turck BL20-ABPL, BL20-BR-24VDC-D, BL20-GWBR-PBDP, BL20-P4T-SBBC-B, BL20-S4T-SBBC Hardware And Engineering

BL20 –

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I/O-MODULES

HARDWARE
AND
ENGINEERING

All brand and product names are trademarks or registered trade marks of the owner

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concerned.

Edition 12/20

© Hans Tu

All rights reserved, including those of the translation.

No part of this manual may be reproduced in any form (printed, photocopy, microfilm or any
other process) or processed, duplicated or distributed by means of electronic systems
without written permission of Hans Turck GmbH & Co. KG, Muelheim an der Ruhr.

Subject to alterations without notice

11

rck GmbH, Muelheim an der Ruhr

Before commencing the installation

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 Disconnect the power supply of the device.

 Ensure that devices cannot be accidentally restarted.

 Verify isolation from the supply.

 Earth and short circuit.

 Cover or enclose neighboring units that are live.

 Follow the engineering instructions of the device concerned.

 Only suitably qualified personnel in accordance with

EN 50 110-1/-2 (VDE 0 105 Part 100) may work on this device/system.

 Before installation and before touching the device ensure that you are free of electrostatic

charge.

 The functional earth (FE) must be connected to the protective earth (PE) or to the potential equa-

lization. The system installer is responsible for implementing this connection.

 Connecting cables and signal lines should be installed so that inductive or capacitive interfe-

rence do not impair the automation functions.

 Install automation devices and related operating elements in such a way that they are well

protected against unintentional operation.

 Suitable safety hardware and software measures should be implemented for the I/O interface so

that a line or wire breakage on the signal side does not result in undefined states in the automa­tion devices.

 Ensure a reliable electrical isolation of the low voltage for the 24 volt supply. Only use power

supply units complying with IEC 60 364-4-41 (VDE 0 100 Part 410) or HD 384.4.41 S2.

 Deviations of the mains voltage from the rated value must not exceed the tolerance limits given

in the specifications, otherwise this may cause malfunction and dangerous operation.

 Emergency stop devices complying with IEC/EN 60 204-1 must be effective in all operating

modes of the automation devices. Unlatching the emergency-stop devices must not cause
restart.

 Devices that are designed for mounting in housings or control cabinets must only be operated

and controlled after they have been installed with the housing closed. Desktop or portable units
must only be operated and controlled in enclosed housings.

 Measures should be taken to ensure the proper restart of programs interrupted after a voltage

dip or failure. This should not cause dangerous operating states even for a short time. If neces­sary, emergency-stop devices should be implemented.

 Wherever faults in the automation system may cause damage to persons or property, external

measures must be implemented to ensure a safe operating state in the event of a fault or
malfunction (for example, by means of separate limit switches, mechanical interlocks etc.).

 The electrical installation must be carried out in accordance with the relevant regulations (e. g.

with regard to cable cross sections, fuses, PE).

 All work relating to transport, installation, commissioning and maintenance must only be carried

out by qualified personnel. (IEC 60 364 and HD 384 and national work safety regulations).

 All shrouds and doors must be kept closed during operation.

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Table of Contents

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1About this manual

1.1 Documentation concept .................................................................................................................................1-2

1.2 Description of symbols used ..........................................................................................................................1-3

1.3 General information........................................................................................................................................1-4

1.3.1 Prescribed use .........................................................................................................................................................................................1-4

1.3.2 Notes concerning planning /installation of this product ........................................................................................................1-4

1.4 List of revisions ................................................................................................................................................1-5

2 BL20 Philosophy

2.1 The basic concept ............................................................................................................................................2-2

2.2 BL20 components ............................................................................................................................................2-3

2.2.1 Gateways ...................................................................................................................................................................................................2-3

2.2.2 Power distribution modules...............................................................................................................................................................2-4

2.2.3 Electronics modules ..............................................................................................................................................................................2-4

2.2.4 Base modules........................................................................................................................................................................................... 2-5

2.2.5 BL20 ECO ...................................................................................................................................................................................................2-6

2.2.6 End plate....................................................................................................................................................................................................2-7

2.2.7 End bracket...............................................................................................................................................................................................2-7

2.2.8 Jumpers......................................................................................................................................................................................................2-8

2.2.9 Shield connection (gateway) ............................................................................................................................................................. 2-8

2.2.10 Marking material.....................................................................................................................................................................................2-9

2.2.11 Shield connection, 2-pole for analog modules ...........................................................................................................................2-9

3 General technical Data of BL20 modules

3.1 Introduction .....................................................................................................................................................3-2

3.2 Abbreviations ..................................................................................................................................................3-3

3.2.1 Module abbreviations........................................................................................................................................................................... 3-3

3.3 Station dimensions..........................................................................................................................................3-6

3.3.1 Dimensions for electronics modules...............................................................................................................................................3-6

3.3.2 Dimensions for base modules ...........................................................................................................................................................3-6

3.3.3 Dimension drawings ............................................................................................................................................................................3-6

3.3.4 Dimensions of the BL20-ECO modules........................................................................................................................................ 3-10

3.4 General technical data of a BL20 station ................................................................................................... 3-11

3.4.1 Approvals ............................................................................................................................................................................................... 3-13

3.4.2 Technical data of base modules .................................................................................................................................................... 3-13

4 Power distribution modules

4.1 Power Feeding modules .................................................................................................................................4-2

4.1.1 Module overview....................................................................................................................................................................................4-2

4.1.2 Power Feeding module, 24 V DC, with diagnostics .................................................................................................................4-3

4.1.3 Power Feeding module, 120/230 V AC, with diagnostics ......................................................................................................4-6

4.2 Bus Refreshing modules .................................................................................................................................4-9

4.2.1 Module overview....................................................................................................................................................................................4-9

4.2.2 Bus Refreshing module with diagnostics ................................................................................................................................. 4-10

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5 Digital input modules

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5.1 General ............................................................................................................................................................ 5-3

5.1.1 Module overview ................................................................................................................................................................................... 5-3

5.2 Digital input module, 2DI, 24 V DC, positive switching (sinking) ............................................................. 5-4

5.2.1 Technical data ......................................................................................................................................................................................... 5-5

5.2.2 Diagnostic and status messages ...................................................................................................................................................... 5-5

5.2.3 Module parameters............................................................................................................................................................................... 5-6

5.2.4 Base modules ......................................................................................................................................................................................... 5-6

5.2.5 Wiring diagrams .................................................................................................................................................................................... 5-6

5.3 Digital input module, 2DI, 24 V DC, negative switching (sourcing) ...........................................................5-8

5.3.1 Technical data ......................................................................................................................................................................................... 5-9

5.3.2 Diagnostic and status messages ...................................................................................................................................................... 5-9

5.3.3 Module parameters.............................................................................................................................................................................5-10

5.3.4 Base modules .......................................................................................................................................................................................5-10

5.3.5 Wiring diagrams ..................................................................................................................................................................................5-10

5.4 Digital input module, 2DI, 120/230 V AC ................................................................................................... 5-12

5.4.1 Technical data .......................................................................................................................................................................................5-13

5.4.2 Diagnostic and status messages ....................................................................................................................................................5-13

5.4.3 Module parameters.............................................................................................................................................................................5-14

5.4.4 Base modules .......................................................................................................................................................................................5-14

5.4.5 Wiring diagrams ..................................................................................................................................................................................5-14

5.5 Digital input module, 4DI, 24 V DC, positive switching (sinking) ...........................................................5-16

5.5.1 Technical data .......................................................................................................................................................................................5-17

5.5.2 Diagnostic and status messages ....................................................................................................................................................5-17

5.5.3 Module parameters.............................................................................................................................................................................5-18

5.5.4 Base modules .......................................................................................................................................................................................5-18

5.5.5 Wiring diagrams ..................................................................................................................................................................................5-19

5.6 Digital input module, 4DI, 24 V DC, negative switching (sourcing) ......................................................... 5-20

5.6.1 Technical data .......................................................................................................................................................................................5-21

5.6.2 Diagnostic and status messages ....................................................................................................................................................5-21

5.6.3 Module parameters.............................................................................................................................................................................5-22

5.6.4 Base modules .......................................................................................................................................................................................5-22

5.6.5 Wiring diagrams ..................................................................................................................................................................................5-23

5.7 Digital input module, 4DI, NAMUR ............................................................................................................. 5-24

5.7.1 Technical data .......................................................................................................................................................................................5-25

5.7.2 Diagnostic and status messages ....................................................................................................................................................5-25

5.7.3 Module parameters.............................................................................................................................................................................5-26

5.7.4 Base modules ........................................................................................................................................................................................5-27

5.7.5 Wiring diagrams ...................................................................................................................................................................................5-27

5.8 Digital input module, BL20 Economy, 8DI, 24 V DC, positive switching (sinking) .................................. 5-28

5.8.1 Technical data .......................................................................................................................................................................................5-29

5.8.2 Diagnostic and status messages ....................................................................................................................................................5-29

5.8.3 Wiring diagrams ..................................................................................................................................................................................5-30

5.9 Digital input module, 16DI, 24 V DC, positive switching (sinking) ........................................................... 5-31

5.9.1 Technical data .......................................................................................................................................................................................5-32

5.9.2 Diagnostic and status messages ....................................................................................................................................................5-32

5.9.3 Module parameters.............................................................................................................................................................................5-33

D300717 1211 - BL20 I/O modulesii

5.9.4 Base modules ....................................................................................................................................................................................... 5-33

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5.9.5 Wiring diagrams .................................................................................................................................................................................. 5-34

5.10 Digital input module, BL20 Economy, 16DI, 24 V DC, positive switching (sinking)................................ 5-35

5.10.1 Technical data....................................................................................................................................................................................... 5-36

5.10.2 Diagnostic and status messages.................................................................................................................................................... 5-36

5.10.3 Wiring diagrams................................................................................................................................................................................... 5-37

5.11 Digital input module, 32DI, 24 V DC, positive switching (sinking)...........................................................5-38

5.11.1 Technical data....................................................................................................................................................................................... 5-39

5.11.2 Diagnostic and status messages.................................................................................................................................................... 5-40

5.11.3 Module parameters ............................................................................................................................................................................ 5-40

5.11.4 Base modules........................................................................................................................................................................................ 5-40

5.11.5 Wiring diagrams................................................................................................................................................................................... 5-41

6 Analog input modules

6.1 General .............................................................................................................................................................6-4

6.1.1 Shielding....................................................................................................................................................................................................6-4

6.1.2 Analog value representation.............................................................................................................................................................. 6-4

6.1.3 Module overview....................................................................................................................................................................................6-5

6.2 Analog input module, 1AI, 0/4...20 mA ........................................................................................................6-6

6.2.1 Technical data..........................................................................................................................................................................................6-7

6.2.2 Diagnostic and status messages.......................................................................................................................................................6-7

6.2.3 Module parameters ............................................................................................................................................................................... 6-8

6.2.4 Base modules .......................................................................................................................................................................................... 6-8

6.2.5 Wiring diagrams ...................................................................................................................................................................................6-9

6.2.6 Measurement value representation............................................................................................................................................. 6-10

6.3 Analog input module, 2AI, 0/4...20 mA ...................................................................................................... 6-11

6.3.1 Technical data....................................................................................................................................................................................... 6-12

6.3.2 Diagnostic and status messages.................................................................................................................................................... 6-12

6.3.3 Module parameters (per channel)................................................................................................................................................. 6-13

6.3.4 Base modules ....................................................................................................................................................................................... 6-13

6.3.5 Wiring diagrams ................................................................................................................................................................................. 6-14

6.3.6 Measurement value representation............................................................................................................................................. 6-15

6.4 Analog input module, 1AI, -10/0...+10 V DC .............................................................................................. 6-16

6.4.1 Technical data....................................................................................................................................................................................... 6-17

6.4.2 Diagnostic and status messages.................................................................................................................................................... 6-17

6.4.3 Module parameters ............................................................................................................................................................................ 6-18

6.4.4 Base modules ....................................................................................................................................................................................... 6-18

6.4.5 Wiring diagrams ................................................................................................................................................................................ 6-19

6.4.6 Measurement value representation............................................................................................................................................. 6-20

6.5 Analog input module, 2AI, -10/0...+10 V DC .............................................................................................. 6-21

6.5.1 Technical data....................................................................................................................................................................................... 6-22

6.5.2 Diagnostic and status messages.................................................................................................................................................... 6-22

6.5.3 Module parameters (per channel)................................................................................................................................................. 6-23

6.5.4 Base modules ....................................................................................................................................................................................... 6-23

6.5.5 Wiring diagrams ................................................................................................................................................................................. 6-24

6.5.6 Measurement value representation............................................................................................................................................. 6-25

6.6 Analog input module, 2AI, Pt-/Ni-sensors ................................................................................................. 6-26

6.6.1 Technical data....................................................................................................................................................................................... 6-27

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6.6.2 Diagnostic and status messages ....................................................................................................................................................6-27

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6.6.3 Module parameters (per channel).................................................................................................................................................6-28

6.6.4 Base modules .......................................................................................................................................................................................6-29

6.6.5 Wiring diagrams ..................................................................................................................................................................................6-29

6.6.6 Measurement value representation..............................................................................................................................................6-30

6.7 Analog input module, 2AI, thermocouple ................................................................................................. 6-33

6.7.1 Technical data ......................................................................................................................................................................................6-34

6.7.2 Diagnostic and status messages ....................................................................................................................................................6-35

6.7.3 Module parameters (per channel).................................................................................................................................................6-36

6.7.4 Base modules .......................................................................................................................................................................................6-37

6.7.5 Wiring diagrams ...................................................................................................................................................................................6-37

6.7.6 Measurement value representation..............................................................................................................................................6-38

6.8 Analog input module, 4AI, voltage/ current............................................................................................... 6-40

6.8.1 Technical data ......................................................................................................................................................................................6-40

6.8.2 Diagnostic and status messages ....................................................................................................................................................6-41

6.8.3 Module parameters (per channel).................................................................................................................................................6-42

6.8.4 Base modules .......................................................................................................................................................................................6-43

6.8.5 Wiring diagrams ..................................................................................................................................................................................6-43

6.8.6 Measurement value representation..............................................................................................................................................6-44

6.9 Analog input module, 8AI voltage/current and 4 Pt/Ni ............................................................................. 6-46

6.9.1 Technical data .......................................................................................................................................................................................6-47

6.9.2 Diagnostic and status messages ....................................................................................................................................................6-48

6.9.3 Module parameters (per channel).................................................................................................................................................6-50

6.9.4 Wiring diagrams ...................................................................................................................................................................................6-51

6.9.5 Standard value representation for voltage/ current...............................................................................................................6-52

6.9.6 Extended Range - value representation for voltage/current...............................................................................................6-55

6.9.7 Value representation for process automation (NE43) for voltage/current.....................................................................6-60

6.9.8 Standard value representation for Pt-/ Ni- and resistance measurement ......................................................................6-64

6.10 Analog input module, 2AI current, HART®.................................................................................................. 6-71

6.10.1 Technical data .......................................................................................................................................................................................6-72

6.10.2 Diagnostic and status messages ....................................................................................................................................................6-72

6.10.3 Module parameters (per channel).................................................................................................................................................6-75

6.10.4 Base modules ........................................................................................................................................................................................6-76

6.10.5 Wiring diagrams ...................................................................................................................................................................................6-77

6.10.6 Process input data ...............................................................................................................................................................................6-78

6.10.7 Standard value representation, 16 Bit Integer ..........................................................................................................................6-79

6.10.8 Extended Range - value representation, 16-bit-representation.........................................................................................6-80

6.10.9 Value representation process automation (NE 43), 16 bit representation .....................................................................6-81

7 Digital output modules

7.1 General ............................................................................................................................................................ 7-3

7.1.1 Module overview ................................................................................................................................................................................... 7-4

7.2 Digital output module, 2DO, 0.5 A, positive switching (sourcing) ............................................................ 7-5

7.2.1 Technical data ......................................................................................................................................................................................... 7-6

7.2.2 Diagnostic and status messages ...................................................................................................................................................... 7-7

7.2.3 Module parameters............................................................................................................................................................................... 7-7

7.2.4 Base modules ......................................................................................................................................................................................... 7-7

7.2.5 Wiring diagrams .................................................................................................................................................................................... 7-8

7.3 Digital output module, 2DO, 0.5 A, negative switching (sinking) .............................................................7-9

D300717 1211 - BL20 I/O modulesiv

7.3.1 Technical data....................................................................................................................................................................................... 7-10

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7.3.2 Diagnostic and status messages.................................................................................................................................................... 7-11

7.3.3 Module parameters ............................................................................................................................................................................ 7-11

7.3.4 Base modules ....................................................................................................................................................................................... 7-11

7.3.5 Wiring diagrams .................................................................................................................................................................................. 7-12

7.4 Digital output module, 2DO, 2 A, positive switching (sourcing) ............................................................. 7-13

7.4.1 Technical data....................................................................................................................................................................................... 7-14

7.4.2 Diagnostic and status messages.................................................................................................................................................... 7-15

7.4.3 Module parameters ............................................................................................................................................................................ 7-15

7.4.4 Base modules ....................................................................................................................................................................................... 7-15

7.4.5 Wiring diagrams .................................................................................................................................................................................. 7-16

7.5 Digital output module, 4DO, 0.5 A, positive switching (sourcing) .......................................................... 7-17

7.5.1 Technical data....................................................................................................................................................................................... 7-18

7.5.2 Diagnostic and status messages.................................................................................................................................................... 7-19

7.5.3 Module parameters ............................................................................................................................................................................ 7-19

7.5.4 Base modules ...................................................................................................................................................................................... 7-19

7.5.5 Wiring diagrams .................................................................................................................................................................................. 7-20

7.6 Digital output module, BL20 Economy, 8DO, 0,5 A, positive switching (sourcing) ............................... 7-21

7.6.1 Technical data....................................................................................................................................................................................... 7-22

7.6.2 Diagnostic and status messages.................................................................................................................................................... 7-23

7.6.3 Wiring diagrams................................................................................................................................................................................... 7-23

7.7 Digital output module, 16DO, 0,5 A, positive switching (sourcing) ........................................................ 7-24

7.7.1 Technical data....................................................................................................................................................................................... 7-25

7.7.2 Diagnostic and status messages.................................................................................................................................................... 7-26

7.7.3 Module parameters ............................................................................................................................................................................ 7-26

7.7.4 Base modules ....................................................................................................................................................................................... 7-27

7.7.5 Wiring diagrams................................................................................................................................................................................... 7-27

7.8 Digital output module, BL20 Economy, 16DO, 0,5 A, positive switching (sourcing) ............................. 7-28

7.8.1 Technical data....................................................................................................................................................................................... 7-29

7.8.2 Diagnostic and status messages.................................................................................................................................................... 7-30

7.8.3 Wiring diagrams................................................................................................................................................................................... 7-30

7.9 Digital output module, 32DO, 0,5 A, positive switching (sourcing) ........................................................ 7-31

7.9.1 Technical data....................................................................................................................................................................................... 7-32

7.9.2 Diagnostic and status messages.................................................................................................................................................... 7-33

7.9.3 Module parameters ............................................................................................................................................................................ 7-33

7.9.4 Base modules ....................................................................................................................................................................................... 7-34

7.9.5 Wiring diagrams................................................................................................................................................................................... 7-34

7.10 Digital output module, 2DO, 0.5A, 120/230 VAC ...................................................................................... 7-35

7.10.1 Technical data .................................................................................................................................................................................... 7-36

7.10.2 Diagnostic and status messages.................................................................................................................................................... 7-37

7.10.3 Module parameters ............................................................................................................................................................................ 7-37

7.10.4 Base modules ...................................................................................................................................................................................... 7-37

7.10.5 Wiring diagrams ................................................................................................................................................................................. 7-38

8 Analog output modules

8.1 General .............................................................................................................................................................8-3

8.1.1 Resolution of analog value representations................................................................................................................................. 8-3

8.1.2 Shielding....................................................................................................................................................................................................8-3

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8.1.3 Module overview ................................................................................................................................................................................... 8-3

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8.2 Analog output module, 1AO, 0/4...20 mA ................................................................................................... 8-4

8.2.1 Technical data ........................................................................................................................................................................................ 8-4

8.2.2 Diagnostic and status messages ...................................................................................................................................................... 8-5

8.2.3 Module parameters............................................................................................................................................................................... 8-5

8.2.4 Base modules .......................................................................................................................................................................................... 8-6

8.2.5 Wiring diagrams ..................................................................................................................................................................................... 8-6

8.2.6 Measurement value representation................................................................................................................................................ 8-6

8.3 Analog output module, 2AO, 0/4...20 mA ................................................................................................... 8-8

8.3.1 Technical data ........................................................................................................................................................................................ 8-8

8.3.2 Diagnostic and status messages ...................................................................................................................................................... 8-9

8.3.3 Module parameters (per channel)................................................................................................................................................... 8-9

8.3.4 Base modules ........................................................................................................................................................................................8-10

8.3.5 Wiring diagrams ...................................................................................................................................................................................8-10

8.3.6 Measurement value representation..............................................................................................................................................8-10

8.4 Analog output module, 2AO, -10/0...+10 V DC ......................................................................................... 8-12

8.4.1 Technical data ......................................................................................................................................................................................8-13

8.4.2 Diagnostic and status messages ....................................................................................................................................................8-14

8.4.3 Module parameters (per channel).................................................................................................................................................8-14

8.4.4 Base modules ........................................................................................................................................................................................8-14

8.4.5 Wiring diagrams ...................................................................................................................................................................................8-15

8.4.6 Measurement value representation..............................................................................................................................................8-15

8.5 Analog output module, 4AO, voltage/ current, Economy ......................................................................... 8-16

8.5.1 Technical data .......................................................................................................................................................................................8-17

8.5.2 Diagnostic and status messages ....................................................................................................................................................8-18

8.5.3 Module parameters (per channel).................................................................................................................................................8-18

8.5.4 Wiring diagrams ..................................................................................................................................................................................8-20

8.5.5 Standard value representation .......................................................................................................................................................8-21

8.5.6 Extended Range - value representation for voltage/current...............................................................................................8-24

8.5.7 Value representation for process automation (NE 43) ...........................................................................................................8-28

8.6 Analog output module, 2AO current, HART

® ................................................................................................................................................... 8-30

8.6.1 Technical data .......................................................................................................................................................................................8-31

8.6.2 Diagnostic and status messages ....................................................................................................................................................8-32

8.6.3 Module parameters (per channel).................................................................................................................................................8-34

8.6.4 Base module ..........................................................................................................................................................................................8-37

8.6.5 Wiring diagram.....................................................................................................................................................................................8-37

8.6.6 Process input data ...............................................................................................................................................................................8-38

8.6.7 Process output data............................................................................................................................................................................8-38

8.6.8 Standard value representation, 16-bit-representation).........................................................................................................8-38

8.6.9 Extended Range - value representation, 16-bit-representation ........................................................................................ 8-39

8.6.10 Value representation process automation (NE 43), 16-bit-representation.....................................................................8-41

9Relay modules

9.1 General ............................................................................................................................................................ 9-2

9.1.1 Load limit curve with resistive load................................................................................................................................................. 9-2

9.1.2 Module overview ................................................................................................................................................................................... 9-3

9.2 Relay module, 2 normally-closed contacts ................................................................................................. 9-4

9.2.1 Technical data ......................................................................................................................................................................................... 9-5

9.2.2 Diagnostic and status messages ...................................................................................................................................................... 9-6

D300717 1211 - BL20 I/O modulesvi

9.2.3 Module parameters ............................................................................................................................................................................... 9-6

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9.2.4 Base modules .......................................................................................................................................................................................... 9-6

9.2.5 Wiring diagrams......................................................................................................................................................................................9-7

9.3 Relay module, 2 normally-open contacts .....................................................................................................9-9

9.3.1 Technical data....................................................................................................................................................................................... 9-10

9.3.2 Diagnostic and status messages.................................................................................................................................................... 9-11

9.3.3 Module parameters ............................................................................................................................................................................ 9-11

9.3.4 Base modules ....................................................................................................................................................................................... 9-11

9.4 Relay module, 2 changeover contacts ....................................................................................................... 9-14

9.4.1 Technical data....................................................................................................................................................................................... 9-14

9.4.2 Diagnostic and status messages.................................................................................................................................................... 9-15

9.4.3 Module parameters ............................................................................................................................................................................ 9-15

9.4.4 Base modules ....................................................................................................................................................................................... 9-16

9.4.5 Wiring diagrams................................................................................................................................................................................... 9-16

10 Technology Modules

10.1 Module BL20-1CNT-24VDC ......................................................................................................................... 10-4

10.1.1 Selecting counter or measurement mode................................................................................................................................. 10-4

10.1.2 Counter modes .................................................................................................................................................................................... 10-5

10.1.3 Main count direction.......................................................................................................................................................................... 10-5

10.1.4 Limit values of count mode .............................................................................................................................................................10-6

10.1.5 Measurement mode.........................................................................................................................................................................10-16

10.1.6 Functions and explanations ..........................................................................................................................................................10-20

10.1.7 Resetting the status bit ...................................................................................................................................................................10-28

10.1.8 Transfer of values/load function..................................................................................................................................................10-29

10.1.9 Technical features ........................................................................................................................................................................... 10-30

10.2 RS232 Interface BL20-1RS232 ................................................................................................................... 10-37

10.2.1 Data transfer method.......................................................................................................................................................................10-37

10.2.2 Data exchange....................................................................................................................................................................................10-37

10.2.3 Process input data (PDin) ...............................................................................................................................................................10-37

10.2.4 Schematic diagram of the receive sequence ..........................................................................................................................10-39

10.2.5 Process output data (PDout) .........................................................................................................................................................10-39

10.2.6 Schematic diagram of the transmit sequence........................................................................................................................ 10-41

10.2.7 Technical data.....................................................................................................................................................................................10-41

10.2.8 Diagnostic and status messages.................................................................................................................................................. 10-43

10.2.9 Module Parameters .........................................................................................................................................................................10-44

10.2.10 Base modules ..................................................................................................................................................................................... 10-45

10.2.11 Wiring diagrams ................................................................................................................................................................................ 10-45

10.2.12 Pin assignment...................................................................................................................................................................................10-46

10.3 RS485/422 interface BL20-1RS485/422 .................................................................................................... 10-47

10.3.1 Transmission procedure .................................................................................................................................................................10-47

10.3.2 Data exchange....................................................................................................................................................................................10-47

10.3.3 Process input data (PDin) ...............................................................................................................................................................10-47

10.3.4 Schematic diagram of the receive sequence ..........................................................................................................................10-49

10.3.5 Process output data (PDout) .........................................................................................................................................................10-49

10.3.6 Schematic diagram of the transmit sequence........................................................................................................................ 10-51

10.3.7 Technical data ....................................................................................................................................................................................10-51

10.3.8 Diagnostic and status messages.................................................................................................................................................. 10-54

10.3.9 Module parameters ......................................................................................................................................................................... 10-55

10.3.10 Base modules ..................................................................................................................................................................................... 10-56

10.3.11 Wiring diagrams ...............................................................................................................................................................................10-56

D300717 1211 - BL20 I/O modules

vii

10.4 SSI Interface BL20-1SSI............................................................................................................................... 10-58

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10.4.1 Transmission procedure................................................................................................................................................................. 10-58

10.4.2 Data exchange................................................................................................................................................................................... 10-58

10.4.3 Internal registers - read and write operations ........................................................................................................................ 10-58

10.4.4 Register access and meaning ....................................................................................................................................................... 10-59

10.4.5 Comparison value 1, comparison value 2................................................................................................................................ 10-61

10.4.6 Lower limit, upper limit .................................................................................................................................................................. 10-62

10.4.7 Offset function / load value........................................................................................................................................................... 10-63

10.4.8 Status messages of the SSI encoder........................................................................................................................................... 10-63

10.4.9 Resetting the register bank ...........................................................................................................................................................10-64

10.4.10 Technical data .................................................................................................................................................................................... 10-65

10.4.11 Diagnostic and status messages ................................................................................................................................................. 10-66

10.4.12 Module parameters ......................................................................................................................................................................... 10-67

10.4.13 Base modules .................................................................................................................................................................................... 10-68

10.4.14 Wiring diagrams ............................................................................................................................................................................... 10-69

10.5 BL20-E-1SWIRE............................................................................................................................................ 10-70

10.5.1 Features................................................................................................................................................................................................ 10-70

10.5.2 Function parameterization............................................................................................................................................................ 10-71

10.5.3 MC (Moeller Conformance) ........................................................................................................................................................... 10-77

10.5.4 Other parameters.............................................................................................................................................................................. 10-77

10.5.5 Diagnostics.......................................................................................................................................................................................... 10-77

10.5.6 Technical features............................................................................................................................................................................. 10-78

10.5.7 Module parameters.......................................................................................................................................................................... 10-84

10.6 Moeller SWIRE conformance criteria ......................................................................................................... 10-89

10.6.1 Special system behavior with the "Moeller Conformance" function ............................................................................. 10-89

10.6.2 System behavior with the configuration checks................................................................................................................... 10-90

11 Mounting and wiring

11.1 Mechanical mounting................................................................................................................................... 11-2

11.1.1 General mounting rules..................................................................................................................................................................... 11-2

11.1.2 Mounting the gateway .....................................................................................................................................................................11-2

11.1.3 Mounting the base module (block or slice design).................................................................................................................11-4

11.1.4 Mounting slot identification and color markers.......................................................................................................................11-5

11.1.5 Jumpers for relay modules...............................................................................................................................................................11-7

11.1.6 Mounting end brackets and end plates ......................................................................................................................................11-8

11.1.7 Wiring with tension clamp connections................................................................................................................................... 11-10

11.1.8 Wiring of screw connection .......................................................................................................................................................... 11-10

11.1.9 Mounting the electronics modules............................................................................................................................................ 11-11

11.1.10 Prevention of false mounting.......................................................................................................................................................11-11

11.1.11 Switchgear cabinet layout.............................................................................................................................................................11-13

11.2 Dismounting from the mounting rail ........................................................................................................ 11-14

11.2.1 Dismounting of a single component......................................................................................................................................... 11-14

11.2.2 Dismounting electronics modules ............................................................................................................................................. 11-15

11.2.3 Dismounting end brackets and Eend plates........................................................................................................................... 11-16

11.2.4 Dismounting base modules.......................................................................................................................................................... 11-16

11.2.5 Dismounting the gateway ............................................................................................................................................................ 11-19

11.3 Plugging and pulling electronics modules ............................................................................................... 11-20

11.4 Handling the BL20 economy modules ...................................................................................................... 11-21

11.4.1 Insertion of the conductor............................................................................................................................................................. 11-21

11.4.2 Removal of the conductor ............................................................................................................................................................. 11-21

D300717 1211 - BL20 I/O modulesviii

12 Module labeling

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12.1 General notes................................................................................................................................................ 12-2

12.1.1 Colors....................................................................................................................................................................................................... 12-2

12.1.2 Designations/catalog numbers...................................................................................................................................................... 12-2

12.2 Gateways ....................................................................................................................................................... 12-3

12.3 Electronics modules ..................................................................................................................................... 12-4

12.4 Base modules ................................................................................................................................................ 12-5

12.5 Labels............................................................................................................................................................. 12-7

13 BL20-Approvals for Zone 2/ Division 2

14 Appendix

14.1 Analog value representation (analog input modules) .............................................................................. 14-2

14.1.1 Equations for 16 bit representation.............................................................................................................................................. 14-4

14.1.2 Equations for 12-bit-representation ........................................................................................................................................... 14-9

14.2 Analog value representation (analog output modules) .........................................................................14-15

14.2.1 Equations for 16 bit representation............................................................................................................................................14-15

14.3 Identcodes of the BL20-modules .............................................................................................................. 14-21

14.4 Nominal current consumption and power loss ........................................................................................ 14-23

14.4.1 Nominal current consumption of the BL20 modules from supply terminal I

14.4.2 Nominal current of the BL20 modules on the module bus IMB.........................................................................................14-25

14.4.3 Power loss of the BL20 modules..................................................................................................................................................14-27

14.5 Acronyms .................................................................................................................................................... 14-29

14.5.1 Electronic and base modules........................................................................................................................................................14-31

14.6 Conversion table decimal to hexadecimal ............................................................................................... 14-33

14.7 Parameter gateway – assignment in hexadecimal format...................................................................... 14-34

14.7.1 Parameter 4 .........................................................................................................................................................................................14-34

14.7.2 Parameter 5 .........................................................................................................................................................................................14-36

L.................................................................................................14-23

15 Glossary

16 Index

D300717 1211 - BL20 I/O modules

ix

D300717 1211 - BL20 I/O modulesx

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1 About this manual

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1.1 Documentation concept.................................................................................................................... 2

1.2 Description of symbols used ............................................................................................................. 3

1.3 General information. ........................................................................................................................ 4

1.3.1 Prescribed use .......................................................................................................................................................................................4

1.3.2 Notes concerning planning /installation of this product ......................................................................................................4

1.4 List of revisions ................................................................................................................................. 5

D300717 1211 - BL20 I/O modules 1-1

About this manual

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1.1 Documentation concept

This manual contains all information about the bus-independent I/O-modules for the modular TURCK
IP20 I/O system BL20.

The following chapters contain a short BL20 system description, exact descriptions of the I/O-modules’
functionality and their technical data as well as all general information concerning the whole system as
for example mounting/dismounting, labeling etc.

Furthermore, this manual contains a short description of the project planning and diagnostics software
for TURCK I/O-systems, the software I/O-ASSISTANT.

The bus-specific BL20-gateways, the connection to the different automation devices, the maximum
system extension as well as all other bus specific information are described in separate manuals
(www.turck.de).

D300717 1211 - BL20 I/O modules1-2

Description of symbols used

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1.2 Description of symbols used

Danger

This sign can be found next to all notes that indicate a source of hazards. This can refer to
danger to personnel or damage to the system (hardware and software) and to the facility.

This sign means for the operator: work with extreme caution.

Attention

This sign can be found next to all notes that indicate a potential
hazard.

This can refer to possible danger to personnel and damages to the system (hardware and
software) and to the facility.

Note

This sign can be found next to all general notes that supply important information about one
or more operating steps. These specific notes are intended to make operation easier and
avoid unnecessary work due to incorrect operation.

D300717 1211 - BL20 I/O modules

1-3

About this manual

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1.3 General information.

Attention

Please read this section carefully. Safety aspects cannot be left to chance when dealing with
electrical equipment.

1.3.1 Prescribed use

Danger

The devices described in this manual must be used only in applications prescribed in this
manual or in the respective technical descriptions, and only with certified components and
devices from third party manufacturers.

Appropriate transport, storage, deployment and mounting as well as careful operating and thorough
maintenance guarantee the trouble-free and safe operation of these devices.

1.3.2 Notes concerning planning /installation of this product

Danger

All respective safety measures and accident protection guidelines must be considered
carefully and without exception.

D300717 1211 - BL20 I/O modules1-4

List of revisions

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1.4 List of revisions

In comparison to the previous manual edition, the following changes/ revisions have been made:

Table 1-1:
List of revisions

Chapter Subject/

Description

Chap. 13 BL20-Approvals for Zone 2/ Division 2,

→ separate manual D301255

Note

The publication of this manual renders all previous editions invalid.

new changed

X

D300717 1211 - BL20 I/O modules

1-5

About this manual

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D300717 1211 - BL20 I/O modules1-6

2 BL20 Philosophy

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2.1 The basic concept .............................................................................................................................. 2

2.2 BL20 components.............................................................................................................................. 3

2.2.1 Gateways.............................................................................................................................................. 3

– Gateways with integrated power supply ........................................................................................... 3

– Gateways without power supply ......................................................................................................3

2.2.2 Power distribution modules .................................................................................................................. 4

2.2.3 Electronics modules ............................................................................................................................. 4

2.2.4 Base modules ....................................................................................................................................... 5

2.2.5 BL20 ECO............................................................................................................................................. 6

2.2.6 End plate............................................................................................................................................... 7

2.2.7 End bracket .......................................................................................................................................... 7

2.2.8 Jumpers................................................................................................................................................ 8

2.2.9 Shield connection (gateway).................................................................................................................8

2.2.10 Marking material ................................................................................................................................... 9

2.2.11 Shield connection, 2-pole for analog modules..................................................................................... 9

D300717 1211 - BL20 I/O modules 2-1

BL20 Philosophy

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2.1 The basic concept

BL20 is a modular I/O system for use in industrial automation. It connects the sensors and actuators in
the field with the higher-level master.

BL20 offers modules for practically all applications:

 Digital input and output modules

 Analog input and output modules

 Technology modules (counters, RS232 interface...)

A complete BL20 station counts as one station on the bus and therefore occupies one fieldbus address
in any given fieldbus structure. A BL20 station consists of a gateway, power distribution modules and I/
O modules.

The connection to the relevant fieldbus is made via the bus-specific gateway, which is responsible for
the communication between the BL20 station and the other fieldbus stations.

The communication within the BL20 station between the gateway and the individual BL20 modules is
regulated via an internal module bus.

Note

The gateway is the only fieldbus-dependent module on a BL20 station. All other BL20

1

modules are not dependent on the fieldbus used.

Flexibility

All BL20 stations can be planned to accommodate the exact number of channels to suit your needs,
because the modules are available in block and slice design.

A BL20 station can contain modules in any combination, which means it is possible to adapt the system
to practically all applications in automated industry.

Compactness

The slim design of the BL20 modules (gateway 50.4 mm / 1.98 inch, slice 12.6 mm / 0.49 inch and block

100.8 mm / 3.97 inch) and their low overall height favor the installation of this system in confined
spaces.

Easy to handle

All BL20 modules, with the exception of the gateway, consist of a base module and an electronics
module.

The gateway and the base modules are snapped onto a mounting rail. The electronics modules are
plugged onto the appropriate base modules.

The base modules are designed as terminal blocks. The wiring is secured by tension clamp or screw
connection. The electronics modules can be plugged or pulled when the station is being commissioned
or for maintenance purposes, without having to disconnect the field wiring from the base modules.

D300717 1211 - BL20 I/O modules2-2

BL20 components

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2.2 BL20 components

For a detailed explanation of the individual BL20 components, please refer to chapter 2 and chapter 4.
The "Appendix" to this manual contains (amongst others) a list of all BL20 components and the
assignment of electronics modules to base modules.

2.2.1 Gateways

The gateway connects the fieldbus to the I/O modules. It is responsible for handling the entire process
data and generates diagnostic information for the higher-level master and the software tool
I/Oassistant.

Gateways with integrated power supply

The BL20 gateways BL20-GWBR-xxx offer an integrated power supply unit for feeding the gateway and
the connected I/O modules.

It is not necessary to supply each individual module with a separate voltage.

Figure 2-1:
Gateway
BL20-GWBR-PBDP

Gateways without power supply

Note

The gateways without integrated power supply unit need an additional power supply
module (bus refreshing module) which feeds the gateway an the connected I/O modules.

D300717 1211 - BL20 I/O modules

2-3

BL20 Philosophy

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2.2.2 Power distribution modules

The power supply for gateways and I/O modules is fed to the power distribution modules; therefore, it
is not necessary to supply each individual module with a separate voltage.

Figure 2-2:
Power
distribution
module

2.2.3 Electronics modules

Electronics modules contain the functions of the BL20 modules (power distribution modules, digital
and analog input/output modules, and technology modules).

Electronics modules are plugged onto the base modules and are not directly connected to the wiring.
The assignment table in the Section "Ordering Information" of the "Appendix" shows the possible
combinations of electronics and base modules. They can be plugged or pulled when the station is
being commissioned or for maintenance purposes, without having to disconnect the field wiring from
the base modules.

Figure 2-3:
Electronics
module in slice
design

D300717 1211 - BL20 I/O modules2-4

BL20 components

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Figure 2-4:
Electronics
module in block
design

2.2.4 Base modules

The field wiring is connected to the base modules. These are constructed as terminals in block and slice
designs and are available in the following variations with either tension clamp or screw connections: 2­/3-wire (2-channel), 4-wire (2-channel) and 4x 2-/3-wire (4-channel).

The assignment table in the Section "Ordering Information" of the "Appendix" shows the possible
combinations of electronics and base modules.

Figure 2-5:
Base module with
tension clamp
connection

Figure 2-6:
Base module with
screw connection

D300717 1211 - BL20 I/O modules

2-5

BL20 Philosophy

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Figure 2-7:
Base module in
block design

2.2.5 BL20 ECO

Figure 2-8:
BL20 ECO

With the BL20 ECO modules the electronics and connection technology is integrated into a single
housing. Thus, the selection of a base module is unnecessary. Within a station the ECO modules can be
combined with the modules with separate electronics/connection technology, provided that the base
modules feature tension spring connections.

D300717 1211 - BL20 I/O modules2-6

BL20 components

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2.2.6 End plate

An end plate on the right-hand side physically completes the BL20 station. An end bracket mounted
into the end plate ensures that the BL20 station remains secure on the mounting rail even when
subjected to vibration.

Figure 2-9:
end Plate

2.2.7 End bracket

A second end bracket to the left of the gateway is necessary, as well as the one mounted into the end
plate to secure the station.

Figure 2-10:
End bracket

D300717 1211 - BL20 I/O modules

2-7

BL20 Philosophy

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2.2.8 Jumpers

Jumpers (QVRs) are used to bridge a connection level of a 4-wire base module. They can be used to
connect potentials in relay modules (bridging the relay roots); thus considerably reducing the amount
of wiring.

Figure 2-11:
Jumpers

2.2.9 Shield connection (gateway)

If the gateway is wired directly to the fieldbus, it is possible to shield the connection using an
attachment on the gateway.

Figure 2-12:
Shield connection
(gateway)

D300717 1211 - BL20 I/O modules2-8

BL20 components

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2.2.10 Marking material

 Labels: for labeling BL20 electronics modules.

 Markers: for colored identification of connection levels of BL20 base modules.

 Dekafix connector markers: for numbering the mounting slots on BL20 base modules.

Figure 2-13:
Marking material

2.2.11 Shield connection, 2-pole for analog modules

The 2-pole shield connection can be used to connect signal-cable shielding to the base modules of
analog input and output modules. A special tension-clamp operating tool (BL20-ZBW5-2) is required to
mount the shield connection onto the base module.

Figure 2-14:
Shield connection

D300717 1211 - BL20 I/O modules

2-9

BL20 Philosophy

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D300717 1211 - BL20 I/O modules2-10

3 General technical Data of BL20 modules

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3.1 Introduction ...................................................................................................................................... 2

3.2 Abbreviations ................................................................................................................................... 3

3.2.1 Module abbreviations ...........................................................................................................................3

3.3 Station dimensions ........................................................................................................................... 6

3.3.1 Dimensions for electronics modules ....................................................................................................6

3.3.2 Dimensions for base modules ..............................................................................................................6

3.3.3 Dimension drawings ............................................................................................................................ 6

3.3.4 Dimensions of the BL20-ECO modules.............................................................................................. 10

3.4 General technical data of a BL20 station ........................................................................................ 11

3.4.1 Approvals............................................................................................................................................ 13

3.4.2 Technical data of base modules......................................................................................................... 13

D300717 1211 - BL20 I/O modules 3-1

General technical Data of BL20 modules

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3.1 Introduction

This chapter describes the general technical data valid for all BL20 modules.

The following chapters contain all information about the BL20 power supply and I/O modules.

Note

The parameter and diagnosis information of the individual modules correspond to those
determined in the bus configuration files (GSD- or EDS- files) which are described in the bus
specific manuals for the BL20 gateways with PROFIBUS-DP (Turck Documentation-No.:
English D300458), with DeviceNet (Turck Documentation-No.: English D300460).

Please refer to these manuals for the fieldbus-specific description of the diagnostic and
parameter data of the individual BL20 modules.

Note

The gateway’s technical data and the gateway’s diagnostic options are also described in the
bus-specific manuals for the BL20 gateways with PROFIBUS-DP (Turck Documentation-No.:
English D300458), with DeviceNet (Turck Documentation-No.: English D300460).

An overview of all electronic modules and the appropriate base modules can be found in the

„Appendix“.

D300717 1211 - BL20 I/O modules3-2

Abbreviations

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3.2 Abbreviations

3.2.1 Module abbreviations

The module designations are explained in the following table:

Table 3-1:
Module
abbreviations

Abbr. Designation Example

ABPL End plate for right-sided termination of a BL20

station

AI Analog input module BL20-1AI-xxx

AO Analog output module BL20-1AO-xxx

B Designation for base module in block design BL20-B3S-SBB

B Bridge connector: bridged connections on the

same connection level in a base module, for
applying potentials

B Added to designation of base modules for those

Bus Refreshing modules used within a BL20
station but do not supply the gateway with
power.

BR Bus Refreshing module BL20-BR-24VDC-D

C Designation of a connection level with cross-

connection to a C-rail and can, among other
things, be used as a PE (only possible with certain
base modules).

BL20-ABPL

BL20-S3T-SBB

BL20-P4T-SBBC-B

BL20-S4T-SBBC

CJ Base module for BL20-2AI-THERMO-PI with

integrated PT1000 for cold junction
compensation

CNT Counter BL20-1CNT-24VDC

CO Change over BL20-2DO-R-CO

D Diagnostics BL20-BR-24VDC-D

DI Digital input module BL20-2DI-24VDC-P

DO Digital output module BL20-2DO-24VDC-2A-P

GW Gateway BL20-GW-PBDP-1.5MB

KLBU Terminal clip, shielded connection for analog

input modules

KO Coding element for coding electronics and base

module

MB Transmission rate MBit/s BL20-GW-PBDP-1.5MB

N Negative switching (sourcing) BL20-2DI-24VDC-N

BL20-S4T-SBBS-CJ

BL20-KLBU/T

BL20-KO/2

D300717 1211 - BL20 I/O modules

3-3

General technical Data of BL20 modules

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Table 3-1:
Module
abbreviations

Abbr. Designation Example

NC Normally closed BL20-2DO-R-NC

NI For connecting resistance thermometers with

BL20-2AI-PT/NI-2/3
sensors Ni100 and NI1000 in 2- or 3-wire
measurement type

NO Normally open BL20-2DO-R-NO

P Positive switching BL20-2DI-24VDC-P

P Designation of the base module for Power

BL20-P3T-SBB
Feeding and Bus Refreshing modules

PBDP BL20 gateway for PROFIBUS-DP BL20-GW-PBDP-1.5MB

PF Power Feeding modules BL20-PF-24VDC-D

PT Analog input module for connecting resistance

BL20-2AI-PT/NI-2/3
thermometers with sensors PT100, PT200, PT500
and PT1000 in 2- or 3-wire measurement type

QV Jumper for relay modules BL20-QV/1

R Relay module BL20-2DO-R-NC

S Designation for base module in slice design BL20-S3T-SBB

S Designation for base modules with screw

BL20-S3S-SBB
connection

S Designation for gateway with screw connection BL20-GW-PBDB-1.5MB-S

S Single connector: non-bridged connections on

BL20-S3T-SBB
the same connection level in a base module, used
for connecting the signal

T Designation for base modules with tension clamp

BL20-S3T-SBB
connection

x Partly for "S" or "T" in the designations of base

BL20-S3x-SBB
modules with screw or tension clamp connection

D300717 1211 - BL20 I/O modules3-4

Abbreviations

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The following abbreviations are used in the technical data and wiring diagrams:

Table 3-2:
technical
abbreviations

Abbr. Designation

GND Ground

I

A

I

L

I

H

I

I

I

L

I

MB

Active level current (with negative switching electronics modules)

Electrical operating supply (field supply)

High-level current

Inactive level current (with negative switching electronics modules)

Low-level current

Current via the module bus

L- Neutral conductor

L+ Positive conductor

PE Protective earth conductor

R

LI

R

LK

R

LL

Load impedance, inductive

Load impedance, resistive

Lamp load

R

LO

Resistive load

SSignal cable

Sh Shielding

U

A

U

H

U

I

U

h

U

L

U

L

U

PF

U

sys

Active level voltage (with negative switching electronics modules)

High-level voltage

Inactive level voltage (with negative switching electronics modules)

Auxiliary voltage for analog sensor

Field supply with LEDs

Low-level voltage

Voltage that is presently being supplied via the power distribution module

System supply

D300717 1211 - BL20 I/O modules

3-5

General technical Data of BL20 modules

73.1 / 2.88

67.8 / 2.67

82.0 / 3.23

56.4 / 2.22

45.2 / 1.78 72.4 / 2.85

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3.3 Station dimensions

3.3.1 Dimensions for electronics modules

Dimensions in mm / inch (w x l x h)

Slice design 12.6 x 74.1 x 55.4 / 0.49 x 2.92 x 2.18

Block design 100.8 x 74.1 x 55.4 / 3.97 x 2.92 x 2.18

3.3.2 Dimensions for base modules

Dimensions in mm / inch (w x l x h)

Slice design

2-/3-wire connection technology 12.6 x 117.6 x 49.9 / 0.49 x 4.63 x 1.96

4-wire connection technology 12.6 x 128.9 x 49.9 / 0.49 x 5.07 x 1.96

4 x 2-/3-wire connection technology 12.6 x 154.5 x 49.9 / 0.49 x 6.08 x 1.96

Block design

2-/3-wire connection technology 100.8 x 117.6 x 49.9 /3.97 x 4.63 x 1.96

4-wire connection technology 100.8 x 128.9 x 49.9 /3.97 x 5.07 x 1.96

4 x 2-/3-wire connection technology 100.8 x 154.5 x 49.9 /3.97 x 6.08 x 1.96

3.3.3 Dimension drawings

Figure 3-1:
Complete BL20
module (with
tension clamp
connection)

D300717 1211 - BL20 I/O modules3-6

Station dimensions

12.6 / 0.49

12.6 / 0.49

100.8 / 3.97

74.1 / 2.92

47.3 / 1.86

55.4 / 2.18

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Figure 3-2:
Rear view of
complete BL20
module in slice
design

Figure 3-3:
Rear view of
complete BL20
module in slice
design

Figure 3-4:
BL20 module in
block design (top
view)

Figure 3-5:
Electronics
module

D300717 1211 - BL20 I/O modules

3-7

General technical Data of BL20 modules

12.6 / 0.49

100.8 / 3.97

154.5 / 6.08

128.9 / 5.07

117.6 / 4.63

4 x 2-/3-wire

4-wire

2-/-3-wire

49.9 / 1.96

41.6 / 1.63

154.5 / 6.08

128.9 / 5.07

117.6 / 4.63

4 x 2-/3-wire

4-wire

2-/-3-wire

49.9 / 1.96

48.3 / 1.90

12.6 / 0.49

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Figure 3-6:
Rear view of
electronics
module in slice
design

Figure 3-7:
Rear view of
electronics
module in block
design

Figure 3-8:
Base module with
tension clamp
connection

Figure 3-9:
Base module with
screw connection

Figure 3-10:
Base module in
slice design (top
view)

D300717 1211 - BL20 I/O modules3-8

Station dimensions

100.8 / 3.97

12.6 / 0.49

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Figure 3-11:
Top view of base
module in block
design

Figure 3-12:
Rear view of
complete BL20
module in slice
design

D300717 1211 - BL20 I/O modules

3-9

General technical Data of BL20 modules

129.5

74.5

161.5

74.5

13

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3.3.4 Dimensions of the BL20-ECO modules

Figure 3-13:
Side view
BL20-E-8D×

Figure 3-14:
Side view
BL20-E-16D×

Figure 3-15:
Rear view
BL20-E-...
complete module

D300717 1211 - BL20 I/O modules3-10

General technical data of a BL20 station

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3.4 General technical data of a BL20 station

Note

The auxiliary power supply must comply with the stipulations of SELV (Safety Extra Low
Voltage) according to IEC 60364-4-41.

Table 3-3:
General technical
data relating to a
station

Supply voltage/ auxiliary voltage

Nominal value (provision for other modules) 24 V DC

Permissible range according to EN 61131-2 (18 to 30 V DC)

Residual ripple according to EN 61131-2

Potential isolation Yes, via optocoupler

Ambient conditions

Ambient temperature

–t

Ambient

–t

-25 to + 85 °C / -13 to 185 °F

Store

0 to + 55 °C / 32 to 131 °F

Relative humidity according to IEC 61 131-2/

EN 50 178

Climatic tests according to IEC 61131-2

Noxious gas – SO2:

10 ppm (rel. humidity < 75 %, non-condensing)

–H2S:

1.0 ppm (rel. humidity < 75 %, non-condensing)

Resistance to vibration according to IEC 61131-2

10 to 57 Hz, Constant

Yes

amplitude 0.075 mm / 0.003 inch, 1g

57 to 150 Hz, Constant acceleration 1 g Yes

Mode of vibration Frequency sweeps with a change in speed of

1 Octave/min

Period of oscillation 20 frequency sweeps per axis of coordinate

Shock resistant according to IEC 68-2-27 18 shocks, sinusoidal half-wave 15 g peak value/

11 ms, in each case in +/- direction per space
coordinate

Resistance to repetitive shock according to IEC
68-2-29

1 000 shocks, half-sinus 25 g peak value/6 ms, in
each case in +/- direction per space coordinate

Topple and fall according to IEC 68-2-31 and free fall according to IEC 68-2-32

Height of fall (Weight < 10 kg) 1.0 m / 39.37 inch

Height of fall (Weight 10 to 40 kg) 0.5 m / 19.69 inch

Test runs 7

D300717 1211 - BL20 I/O modules

3-11

General technical Data of BL20 modules

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Device with packaging, electrically tested printed-circuit board

Electromagnetic compatibility (EMC) according to
EN 50 082-2 (Industry)

Static electricity according to EN 61 000-4-2

– Discharge through air (direct) 8 kV

– Relay discharge (indirect) 4 kV

Electromagnetic HF fields according to EN 61
000-4-3 and ENV 50 204

Conducted interferences induced by HF fields
according to EN 61 000-4-6

Fast transients (Burst) according to EN 61 000-4-4

Emitted interference according to EN 50 081-2
(Industry)

Reliability

Operational life MTBF min. 120000 h

Electronic modules pull/ plug cycles 20

Tests according to EN 61 131-2

Cold DIN IEC 68-2-1, temperature -25 °C / -13 °F,

Dry heat DIN IEC 68-2-2, Temperature +85 °C / 185 °F,

Damp heat, cyclic DIN IEC 68-2-30, temperature +55 °C / 131 °F,

10 V/m

10 V

according to EN 55 011 Class A, Group 1

duration 96 h; not in use

duration 96 h; device not in use

duration 2 cycles every 12 h; device in use

Temperature change DIN IEC 68-2-14, temperature 0 to +55 °C / 32 to

131 °F, duration 2 cycles, temperature change per
minute; device in use

Pollution severity according to IEC 664
(EN 61 131-2)

Protection class according to IEC 529 IP20

Danger

This device can cause radio disturbances in residential areas and in small industrial areas
(residential, business and trading). In this case, the operator can be required to take
appropriate measures to suppress the disturbance at his own cost.

2

D300717 1211 - BL20 I/O modules3-12

General technical data of a BL20 station

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3.4.1 Approvals

Table 3-4:
Approvals

Approvals

CE

CSA

UL

3.4.2 Technical data of base modules

Table 3-5:
technical data for
base modules

Protection class IP 20 IP 20

Insulation stripping length 8 mm / 0.32 inch 8 mm / 0.32 inch

Max. wire range 0.5 to 2.5 mm

Crimpable wire

"e" solid core H 07V-U 0.5 to 2.5 mm

"f" flexible core H 07V-K 0.5 to 1.5 mm

"f" with ferrules according to
DIN 46228/1 (ferrules crimped
gas-tight)

BL20 BL20 Economy

0.0039 inch

0.0039 inch

0.0023 inch

0.5 to 1.5 mm

0.0023 inch

2

2

2

2

2

/ 0.0008 to

/ 20 to 12 AWG

2

/ 0.0008 to

/ 20 to 12 AWG

2

/ 0.0008 to

/ 20 to 16 AWG

2

/ 0.0008 to

/ 20 to 16 AWG

0,14 to 1,5 mm²/ 0.0056 to

0.06 inch2 / 26 to 16 AWG

0,25 to 1,5 mm

2/

0.06 inch

0,25 to 1,5 mm

0.06 inch

0,25 to 1,5 mm

0.06 inch

22 to 16 AWG

2/

22 to 16 AWG

2/

22 to 16 AWG

2

/ 0.01 to

2

/ 0.01 to

2

/ 0.01 to

Plug gauge according to

A1 A1

IEC 947-1/1988

max. torque for screw

0,4 to 0,6 Nm -

connection technology

Measurement data according to VDE 0611 Part 1/8.92/ IEC 947-7-1/1989

Rated voltage 250 V 250 V

Rated current 17.5 A 17,5 A

Rated surge 4 kV 4 kV

Rated cross section 1,5 mm

2

1,5 mm

Pollution severity 2 2

TOP connection technology Tension clamp or screw

connection

2

D300717 1211 - BL20 I/O modules

3-13

General technical Data of BL20 modules

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D300717 1211 - BL20 I/O modules3-14

4 Power distribution modules

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4.1 Introduction ...................................................................................................................................... 2

4.2 Abbreviations ................................................................................................................................... 3

4.2.1 Module abbreviations ...........................................................................................................................3

4.3 Station dimensions ........................................................................................................................... 6

4.3.1 Dimensions for electronics modules ....................................................................................................6

4.3.2 Dimensions for base modules ..............................................................................................................6

4.3.3 Dimension drawings ............................................................................................................................ 6

4.3.4 Dimensions of the BL20-ECO modules.............................................................................................. 10

4.4 General technical data of a BL20 station ........................................................................................ 11

4.4.1 Approvals............................................................................................................................................ 13

4.4.2 Technical data of base modules......................................................................................................... 13

D300717 1211 - BL20 I/O modules 4-1

Power distribution modules

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4.1 Power Feeding modules

Power Feeding modules distribute the required 24 V DC or 120/230 V AC field voltage to the I/O
modules. They are necessary when groups of modules with different potentials are planned within a
BL20 station, or if the rated supply voltage cannot be guaranteed. Power Feeding modules are
potentially isolated from the adjoining power supply module and modules to the left side.

Danger

Power Feeding modules cannot be used to distribute 5 V DC to BL20 gateways.

By using Power Feeding modules, it is not necessary to distribute power separately to each BL20
I/O module.

Power Feeding modules are available in slice design. They are mounted on to base modules with
tension clamp or screw connections. The dusty grey color of the base modules for Power Feeding
modules clearly distinguishes them from the base modules designed for BL20 I/O modules.

LED status indicators

Error signals and diagnostic statuses are indicated via LEDs on the module. The corresponding
diagnostic information is transmitted to the gateway via diagnostic bits.

4.1.1 Module overview

 BL20-PF-24VDC-D

 BL20-PF-120/230VAC-D

D300717 1211 - BL20 I/O modules4-2

Power Feeding modules

Logic

24 Module supplyV DC

5 Module busV DC

Galvanic isolation

of the Diagnostics U

L

24 Supply (UL)V DC

EMC Filter

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4.1.2 Power Feeding module, 24 V DC, with diagnostics

Figure 4-1:
BL20-PF-24VDC-D

Figure 4-2:
Block diagram

Table 4-1:
Technical data

Technical data

Designation BL20-PF-24VDC-D

Nominal voltage 24 V DC

Permissible range 18 to 30 V DC

Field supply U

Permissible range of U

Nominal current from module bus I

24 V DC

L

L

MB

18 to 30 V DC

≤ 28 mA

Ripple < 5%

Residual ripple according to EN 61131-2

Maximum operating current I

EI

10 A

Voltage anomalies according to EN 61 000-4-11/ EN 61 131-2

D300717 1211 - BL20 I/O modules

4-3

Power distribution modules

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Diagnostic and status messages

The diagnostic functions monitor the supply voltages (system and field supply) supplied by the user for
undervoltage. The diagnostic functions indicate errors via the "DIA" LED and transmit the
corresponding diagnostic information to the gateway..

Table 4-2:
LED indicators

LED Display Meaning Remedy

DIA Red,

flashing,

0.5 Hz

Diagnostics pending Check the wiring from the module bus to the field

power supply and to the system’s power supply.
Check the voltages of the field power supply and to
the system power supply.

Red Module bus

communication
failure

Check if more than two ad-joining electronics
modules have been pulled.
Check the wiring from the module bus to the
system power supply.

Off No error messages or

–

diagnostics

U

L

Green Field power supply

–
via external power
supply unit OK

Off Field power supply via

external power supply

Check the wiring to the field power supply.

Check the external power supply unit.
unit faulty

This module has the following diagnostic data:

 "Undervoltage field supply"

Monitoring of the external power supply to the field

Module parameters

Figure 4-3:
Base module
BL20-P3T-SBB

None

Base modules

D300717 1211 - BL20 I/O modules4-4

Power Feeding modules

24 V DC

23

22

21

13

12

11

–

+

24 V DC

PE

24

23

22

21

14

13

12

11

–

+

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Figure 4-4:
Base module
BL20-P4T-SBBC

 with tension clamp connection

BL20-P3T-SBB
BL20-P4T-SBBC

 with screw connection

BL20-P3S-SBB
BL20-P4S-SBBC

Wiring diagrams

Figure 4-5:
Wiring diagram

Figure 4-6:
Wiring diagram

D300717 1211 - BL20 I/O modules

4-5

Power distribution modules

Logic

120/230 Module supplyV DC

5 Module busV DC

Galvanic isolation

of the Diagnostics U

L

120/230 V AC Supply (UL)

EMC Filter

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4.1.3 Power Feeding module, 120/230 V AC, with diagnostics

Figure 4-7:

electronics module

Figure 4-8:
Block diagram

Table 4-3:
Technical data

Technical data

Designation BL20-PF-120/230VAC-D

Nominal voltage 120/230 V AC

– Permissible range according to EN 61 131-2

Field supply U

Permissible range of U

Nominal current from module bus I

120/230 V AC

L

L

MB

according to EN 61 131-2

≤ 25 mA

Ripple < 5%

Residual ripple according to EN 61131-2

Maximum operating current I

EI

10 A

Voltage anomalies according to EN 61 000-4-11/ EN 61 131-2

D300717 1211 - BL20 I/O modules4-6

Power Feeding modules

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Diagnostic and status messages

The diagnostic functions monitor the supply voltages (system and field supply) supplied by the user for
undervoltage. The diagnostic functions indicate errors via the "DIA" LED and transmit the
corresponding diagnostic information to the gateway..

Table 4-4:
LED indicators

LED Display Meaning Remedy

DIA Red,

Diagnostics pending -

flashing,

0.5 Hz

Red,
flashing,

0.5 Hz and
LED U

L

voltage at the
terminal < 84 V AC ± 5
V AC

Check the wiring to the field power supply.
Check the external power supply unit and external
mains unit.

"Off"

Red Module bus

communication
failure

Check if more than two ad-joining electronics
modules have been pulled.
Check the wiring from the module bus to the
system power supply.

Off No error messages or

–

diagnostics

U

L

Green Field power supply

–
via external power
supply unit OK

Off Field power supply via

external power supply

Check the wiring to the field power supply.

Check the external power supply unit.
unit missing

Figure 4-9:
Base module
BL20-P3T-SBB

This module has the following diagnostic data:

 "Undervoltage field supply"

Monitoring the external power supply to the field

Module parameters

None

Base modules

D300717 1211 - BL20 I/O modules

4-7

Power distribution modules

23

22

21

13

12

11

N

L

24

23

22

21

14

13

12

11

PE

N

L

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Figure 4-10:
Base module
BL20-P4T-SBBC

 with tension clamp connection

BL20-P3T-SBB
BL20-P4T-SBBC

 with screw connection

BL20-P3S-SBB
BL20-P4S-SBBC

Wiring diagrams

Figure 4-11:
Wiring diagram

Figure 4-12:
Wiring diagram

D300717 1211 - BL20 I/O modules4-8

Bus Refreshing modules

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4.2 Bus Refreshing modules

Bus Refreshing modules are used to distribute 5 V DC to the internal BL20 module bus, as well as to
distribute a nominal voltage of 24 V DC (permissible range according to EN 61 131-2) to the various
BL20 modules, when building up BL20 stations with gateways without integrated power supply.

The adjoining power supply module and modules to the left are potentially isolated.

Attention

When using BL20 gateways with an integrated power supply unit (BL20-GWBR-xxxx), no
additional Bus Refreshing module is needed to distribute 5 V DC to the internal BL20 module
bus, as well as the nominal voltage of 24 V DC.

Attention

When using Bus Refreshing modules, this must be mounted immediately to the right of the
gateway. This and a special base module guarantee the 5 V DC supply to the gateway.

Bus Refreshing modules eliminate the necessity to separately distribute the system or field voltage to
each BL20 I/O module. Depending on the planned application, it is possible to build tailor-made groups
of modules with different potentials by selecting appropriate Bus Refreshing modules. Bus Refreshing
modules are available in slice design. They are mounted on to base modules with tension clamp or
screw connections. The dusty grey color of the base modules for Bus Refreshing modules clearly
distinguishes them from the base modules designed for BL20 I/O modules.

LED status indicators

Error signals and diagnostic statuses are indicated via LEDs on the module. The corresponding
diagnostic information is transmitted to the gateway via diagnostic bits.

4.2.1 Module overview

 BL20-BR-24VDC-D

Note

The structure of the individual supplies is described in detail in
chapter 7.

D300717 1211 - BL20 I/O modules

4-9

Power distribution modules

Logic

24 Module supplyV DC

5 Module bus

5 Gateway supply

V DC

V DC

24 Supply U

sys

V DC 24 Supply U

L

V DC

EMC Filter

EMC Filter

Diagnostics

24 V DC

5 V DC

Galvanic isolation

of the diagnostics U

L

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4.2.2 Bus Refreshing module with diagnostics

Figure 4-13:
BL20-BR-24VDC-D

Figure 4-14:
Block diagram

Table 4-5:
Technical data

Technical data

Designation BL20-BR-24VDC-D

Nominal voltage 24 V DC

System supply U

sys

Permissible range for U

Permissible range for U

Field supply U

24 V DC

L

Permissible range for U

= 24 V DC 18 to 30 V DC

sys

= 5 V DC 4.7 to 5.3 V DC

sys

L

24 V DC / 5 V DC

18 to 30 V DC

Ripple < 5%

Residual ripple according to EN 61131-2

Maximum operating current I

Maximum system current supply I

EI

MB

10 A

1.5 A

D300717 1211 - BL20 I/O modules4-10

Bus Refreshing modules

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Diagnostic and status messages

The diagnostic functions monitor the supply voltages (system and field supply) supplied by the user for
undervoltage. They indicate errors via "DIA" LED and transmit corresponding diagnostic information to
the gateway.

Table 4-6:
LED indicators

LED Display Meaning Remedy

DIA Red,

flashing,

0.5 Hz

Faulty power supply

sys

L

or

to the field U
system U

Check the wiring from the module bus to the field

power supply and to the system’s power supply.

Check the voltages of the field power supply and to

the system power supply.

Red Module bus

communication
failure

Check if more than two ad-joining electronics

modules have been pulled.

Check the wiring from the module bus to the

system power supply.

Off No error messages or

–
diagnostics

V

cc

Green 5 Vcc voltage supply

–
to the module bus is
OK

Off 5 V

the module bus is

voltage supply to

cc

When LED "Sys" is off, then check the wiring and

voltage of the system power supply.
faulty

Sys Green System power supply

–
via external power
supply unit OK

Off System power supply

via external power
supply unit faulty

U

L

Green Field power supply

via external power
supply unit OK

Off Field power supply

via external power
supply unit faulty

This module has the following diagnostic data:

 "Module bus undervoltage warning"

Monitoring of the external power supply to the system
Usys = 24 V DC.

 "Undervoltage field supply"

Monitoring of the external power supply to the field

Module parameters

None

Check the wiring to the system power supply.

Check the external power supply unit.

–

Check the wiring to the field power supply.

Check the external power supply unit.

D300717 1211 - BL20 I/O modules

4-11

Power distribution modules

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Base modules

Figure 4-15:
Base module
BL20-P3T-SBB
with gateway
power supply

Figure 4-16:
Base module
BL20-P4T-SBBC-B
without gateway
power supply

Base modules with power supply to the gateway:

 with tension clamp connection

BL20-P3T-SBB
BL20-P4T-SBBC

 with screw connection

BL20-P3S-SBB
BL20-P4S-SBBC

D300717 1211 - BL20 I/O modules4-12

Bus Refreshing modules

B

A

23

22

21

13

12

11

–

+

–

+

24 V DC

Module bus supply

24 V DC
Field
supply

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Base modules without power supply to the gateway:

 with tension clamp connection

BL20-P3T-SBB-B
BL20-P4T-SBBC-B

 with screw connection:

BL20-P3S-SBB-B
BL20-P4S-SBBC-B

The base modules with or without power distribution to the gateways can be differentiated as follows:

Figure 4-17:
Assigning base
modules

Awith power

distribution to
the gateway:
light grey
connection

Bwithout power

distribution to
the gateway:
yellow
connection

Attention

Only the modules BL20-P3x-SBB or BL20-P4x-SBBC
(= first module to the right of the gateway) can be used to distribute power to the gateways.

Wiring diagrams

Figure 4-18:
Wiring diagram

D300717 1211 - BL20 I/O modules

BL20-P3x-SBB with gateway supply
BL20-P3x-SBB-B without gateway supply

4-13

Power distribution modules

24

23

22

21

14

13

12

11

–

+

PE

–

+

24 V DC

Module bus supply

24 V DC
Field
supply

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Figure 4-19:
Wiring diagram

BL20-P4x-SBBC with gateway supply
BL20-P4x-SBBC-B without gateway supply

D300717 1211 - BL20 I/O modules4-14

5 Digital input modules

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5.1 General.............................................................................................................................................. 3

5.1.1 Module overview ..................................................................................................................................3

5.2 Digital input module, 2DI, 24 V DC, positive switching (sinking) .................................................... 4

5.2.1 Technical data ......................................................................................................................................5

5.2.2 Diagnostic and status messages.......................................................................................................... 5

5.2.3 Module parameters .............................................................................................................................. 6

5.2.4 Base modules ...................................................................................................................................... 6

5.2.5 Wiring diagrams ................................................................................................................................... 6

5.3 Digital input module, 2DI, 24 V DC, negative switching (sourcing) ................................................. 8

5.3.1 Technical data ......................................................................................................................................9

5.3.2 Diagnostic and status messages.......................................................................................................... 9

5.3.3 Module parameters ............................................................................................................................ 10

5.3.4 Base modules .................................................................................................................................... 10

5.3.5 Wiring diagrams ................................................................................................................................. 10

5.4 Digital input module, 2DI, 120/230 V AC ....................................................................................... 12

5.4.1 Technical data .................................................................................................................................... 13

5.4.2 Diagnostic and status messages........................................................................................................ 13

5.4.3 Module parameters ............................................................................................................................ 14

5.4.4 Base modules .................................................................................................................................... 14

5.4.5 Wiring diagrams ................................................................................................................................. 14

5.5 Digital input module, 4DI, 24 V DC, positive switching (sinking) .................................................. 16

5.5.1 Technical data .................................................................................................................................... 17

5.5.2 Diagnostic and status messages........................................................................................................ 17

5.5.3 Module parameters ............................................................................................................................ 18

5.5.4 Base modules .................................................................................................................................... 18

5.5.5 Wiring diagrams ................................................................................................................................. 19

5.6 Digital input module, 4DI, 24 V DC, negative switching (sourcing) ............................................... 20

5.6.1 Technical data .................................................................................................................................... 21

5.6.2 Diagnostic and status messages........................................................................................................ 21

5.6.3 Module parameters ............................................................................................................................ 22

5.6.4 Base modules .................................................................................................................................... 22

5.6.5 Wiring diagrams ................................................................................................................................. 23

5.7 Digital input module, 4DI, NAMUR ................................................................................................. 24

5.7.1 Technical data .................................................................................................................................... 25

5.7.2 Diagnostic and status messages........................................................................................................ 25

5.7.3 Module parameters ............................................................................................................................ 26

5.7.4 Base modules ..................................................................................................................................... 27

5.7.5 Wiring diagrams.................................................................................................................................. 27

5.8 Digital input module, BL20 Economy, 8DI, 24 V DC, positive switching (sinking) .......................... 28

5.8.1 Technical data .................................................................................................................................... 29

5.8.2 Diagnostic and status messages........................................................................................................ 29

5.8.3 Wiring diagrams ................................................................................................................................. 30

D300717 1211 - BL20 I/O modules 5-1

Digital input modules

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5.9 Digital input module, 16DI, 24 V DC, positive switching (sinking) ................................................. 31

5.9.1 Technical data ....................................................................................................................................32

5.9.2 Diagnostic and status messages........................................................................................................32

5.9.3 Module parameters.............................................................................................................................33

5.9.4 Base modules .................................................................................................................................... 33

5.9.5 Wiring diagrams ................................................................................................................................. 34

5.10 Digital input module, BL20 Economy, 16DI, 24 V DC, positive switching (sinking) ........................ 35

5.10.1 Technical data .................................................................................................................................... 36

5.10.2 Diagnostic and status messages........................................................................................................ 36

5.10.3 Wiring diagrams ..................................................................................................................................37

5.11 Digital input module, 32DI, 24 V DC, positive switching (sinking) ................................................. 38

5.11.1 Technical data .................................................................................................................................... 39

5.11.2 Diagnostic and status messages........................................................................................................ 40

5.11.3 Module parameters.............................................................................................................................40

5.11.4 Base modules .....................................................................................................................................40

5.11.5 Wiring diagrams ..................................................................................................................................41

D300717 1211 - BL20 I/O modules5-2

General

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5.1 General

Digital input modules (DI) detect electrical high- and low-level values through the base module
connections and transmit the corresponding digital value to the gateway via the module bus.

The module bus electronics of the digital input modules are galvanically isolated from the field level via
an optocoupler. The module provides reverse polarity protection.

LED status indicators

Channel statuses are indicated by LEDs. Error signals from the I/O level are indicated by each module
via the "DIA" LED.

A continuously lit up red "DIA" LED indicates the failure of the module bus communication at the digital
input module.

5.1.1 Module overview

Table 5-1:
Overview digital
input modules

Number of channels Positive switching

BL20-2DI-24VDC-P 2 

BL20-2DI-24VDC-N 2

BL20-2DI-120/230VAC 2

BL20-4DI-24VDC-P 4 

BL20-4DI-24VDC-N 4

BL20-E-8DI-24VDC-P 8 

BL20-16DI-24VDC-P 16 

BL20-32DI-24VDC-P 32 

D300717 1211 - BL20 I/O modules

5-3

Digital input modules

Logic

24 Module supplyV DC

24 V DC

GND

5 Module busV DC

Galvanic isolation

Field

Filter

Filter

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5.2 Digital input module, 2DI, 24 V DC, positive switching (sinking)

Figure 5-1:
BL20-2DI-24VDC-P

Figure 5-2:
Block diagram

D300717 1211 - BL20 I/O modules5-4

Digital input module, 2DI, 24 V DC, positive switching (sinking)

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5.2.1 Technical data

Table 5-2:
Technical data

Designation BL20-2DI-24VDC-P

Number of channels 2

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

24 V DC

≤ 20 mA

≤ 28 mA

Power loss of the module, typical approx. 0.7 W

Input voltage, nominal value at 24 V DC

Low level U

High level U

L

H

- 30 V to +5 V

11 V to 30 V

Input current

Low level I

High level I

L

H

0 mA to 1.5 mA

2 mA to 10 mA

Input delay

t

ON

t

OFF

2-wire initiators (Bero

®

) can be connected with a permissible closed-circuit current of 1.5 mA

< 200 μs

< 200 μs

5.2.2 Diagnostic and status messages

Table 5-3:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

11 Green Status of channel 1 = "1"

Off Status of channel 1 = "0"

21 Green Status of channel 2 = "1"

Off Status of channel 2 = "0"

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules

5-5

Digital input modules

23

22

21

13

12

11

SS

––

++

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5.2.3 Module parameters

None

5.2.4 Base modules

Figure 5-3:
Base module
BL20-S3T-SBB

Figure 5-4:
Base module
BL20-S4T-SBBC

 with tension clamp connection

BL20-S3T-SBB
BL20-S4T-SBBC

 with screw connection

BL20-S3S-SBB
BL20-S4S-SBBC

5.2.5 Wiring diagrams

Figure 5-5:
Wiring diagram
BL20-S3x-SBB

D300717 1211 - BL20 I/O modules5-6

Digital input module, 2DI, 24 V DC, positive switching (sinking)

23

22

21

13

12

11

SS

––

++

PE PE

2414

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Figure 5-6:
Wiring diagram
BL20-S4x-SBBC

D300717 1211 - BL20 I/O modules

5-7

Digital input modules

Logic

24 Module supplyV DC

5 Module busV DC

Galvanic isolation

Field

Filter

Filter

24 V DC

GND

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5.3 Digital input module, 2DI, 24 V DC, negative switching (sourcing)

Figure 5-7:

BL20-2DI-24VDC-N

Figure 5-8:
Block diagram

D300717 1211 - BL20 I/O modules5-8

Digital input module, 2DI, 24 V DC, negative switching (sourcing)

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5.3.1 Technical data

Table 5-4:
Technical data

Designation BL20-2DI-24VDC-N

Number of channels 2

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

24 V DC

≤ 20 mA

≤ 28 mA

Power loss of the module, typical approx. 0.7 W

Input voltage, nominal value at 24 V DC

Active level U

Inactive level U

A

I

0 V to +5 V

> (U

- 11 V)

PF

Input current

Active level I

Inactive level I

A

I

1.3 mA to 6 mA

0 mA to 1.2 mA

Input delay

t

ON

t

OFF

2-wire initiators (Bero

®

) can be connected with a permissible closed-circuit current of 1.5 mA

< 200 μs

< 200 μs

5.3.2 Diagnostic and status messages

Table 5-5:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

11 Green Status of channel 1 = "1"

Off Status of channel 1 = "0"

21 Green Status of channel 2 = "1"

Off Status of channel 2 = "0"

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules

5-9

Digital input modules

23

22

21

13

12

11

SS

++

––

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5.3.3 Module parameters

None

5.3.4 Base modules

Figure 5-9:
Base module
BL20-S3T-SBB

Figure 5-10:
Base module
BL20-S4T-SBBC

 with tension clamp connection

BL20-S3T-SBB
BL20-S4T-SBBC

 with screw connection

BL20-S3S-SBB
BL20-S4S-SBBC

5.3.5 Wiring diagrams

Figure 5-11:
Wiring diagram
BL20-S3x-SBB

D300717 1211 - BL20 I/O modules5-10

Digital input module, 2DI, 24 V DC, negative switching (sourcing)

23

22

21

13

12

11

SS

++

––

PE PE

2414

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Figure 5-12:
Wiring diagram
BL20-S4x-SBBC

D300717 1211 - BL20 I/O modules

5-11

Digital input modules

Logic

120/230 Module supplyVAC

5 Module busV DC

Galvanic isolation

Field

Filter

Filter

120/230 V AC

GND

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5.4 Digital input module, 2DI, 120/230 V AC

Figure 5-13:
BL20-2DI­120/230VAC

Figure 5-14:
Block diagram

D300717 1211 - BL20 I/O modules5-12

Digital input module, 2DI, 120/230 V AC

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5.4.1 Technical data

Table 5-6:
Technical data

Designation BL20-2DI-120/230VAC

Number of channels 2

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

120/230 V AC

≤ 20 mA

≤ 28 mA

Power loss of the module, typical < 1 W

Input voltage, nominal value at 120/230 V AC

Low level U

High level U

L

H

0 V AC to 20 V AC

79 V AC to 265 V AC

Frequency range 47.5 Hz to 63 Hz

Input current

Low level I

High level I

L

H

0 mA to 1 mA

3 mA to 10 mA

Input delay

t

ON

< 20 ms

t

OFF

Maximum permissible wire capacity 141 nF at 79 V AC/50 Hz

5.4.2 Diagnostic and status messages

Table 5-7:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

11 Green Status of channel 1 = "1"

Off Status of channel 1 = "0"

21 Green Status of channel 2 = "1"

Off Status of channel 2 = "0"

< 20 ms

23 nF at 265 V AC/50 Hz

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules

5-13

Digital input modules

23

22

21

13

12

11

SS

NN

LL

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5.4.3 Module parameters

None

5.4.4 Base modules

Figure 5-15:
Base module
BL20-S3T-SBB

Figure 5-16:
Base module
BL20-S4T-SBBC

 with tension clamp connection

BL20-S3T-SBB
BL20-S4T-SBBC

 with screw connection

BL20-S3S-SBB
BL20-S4S-SBBC

5.4.5 Wiring diagrams

Figure 5-17:
Wiring diagram
BL20-S3x-SBB

D300717 1211 - BL20 I/O modules5-14

Digital input module, 2DI, 120/230 V AC

NN

LL

23

22

21

13

12

11

SS

PE PE

2414

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Figure 5-18:
Wiring diagram
BL20-S4x-SBBC

D300717 1211 - BL20 I/O modules

5-15

Digital input modules

24 V DC

GND

Logic

24 Module supplyV DC

5 Module busV DC

Galvanic isolation

Field

Filter Filter Filter Filter

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5.5 Digital input module, 4DI, 24 V DC, positive switching (sinking)

Figure 5-19:
BL20-4DI-24VDC-P

Figure 5-20:
Block diagram

D300717 1211 - BL20 I/O modules5-16

Digital input module, 4DI, 24 V DC, positive switching (sinking)

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5.5.1 Technical data

Table 5-8:
Technical data

Designation BL20-4DI-24VDC-P

Number of channels 4

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

Power loss of the module, typical

MB

L

L

24 V DC

≤ 40 mA

≤ 29 mA

approx. 1 W

Input voltage, nominal value at 24 V DC

Low level U

High level U

L

H

- 30 V to +5 V

15 V to 30 V

Input current

Low level I

High level I

L

H

0 mA to 1.5 mA

2 mA to 10 mA

Input delay

t

ON

t

OFF

< 200 μs

< 200 μs

5.5.2 Diagnostic and status messages

Table 5-9:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

11 Green Status of channel 1 = "1"-

Off Status of channel 1 = "0"

21 Green Status of channel 2 = "1"

Off Status of channel 2 = "0"

14 Green Status of channel 3 = "1"

Off Status of channel 3 = "0"

24 Green Status of channel 4 = "1"

Off Status of channel 4 = "0"

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules

5-17

Digital input modules

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5.5.3 Module parameters

None

5.5.4 Base modules

Figure 5-21:
Base module
BL20-S4T-SBBS

Figure 5-22:

Base module
BL20-S6T-SBBSBB

 with tension clamp connection

BL20-S4T-SBBS
BL20-S6T-SBBSBB

 with screw connection

BL20-S4S-SBBS
BL20-S6S-SBBSBB

D300717 1211 - BL20 I/O modules5-18

Digital input module, 4DI, 24 V DC, positive switching (sinking)

23

22

21

13

12

11

SS

SS

++

2414

26

25

24

23

22

21

16

15

14

13

12

11

S

S

S

S

–

–

–

–

+

+

+

+

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5.5.5 Wiring diagrams

Figure 5-23:
Wiring diagram
BL20-S4x-SBBS

Figure 5-24:
Wiring diagram
BL20-S6x-SBBSBB

D300717 1211 - BL20 I/O modules

5-19

Digital input modules

Logic

24 Module supplyV DC

5 Module busV DC

Galvanic isolation

Field

Filter Filter Filter Filter

24 V DC

GND

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5.6 Digital input module, 4DI, 24 V DC, negative switching (sourcing)

Figure 5-25:

BL20-4DI-24VDC-N

Figure 5-26:
Block diagram

D300717 1211 - BL20 I/O modules5-20

Digital input module, 4DI, 24 V DC, negative switching (sourcing)

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5.6.1 Technical data

Table 5-10:
Technical data

Designation BL20-4DI-24VDC-N

Number of channels 4

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

24 V DC

≤ 40 mA

≤ 28 mA

Power loss of the module, typical < 1 W

Input voltage, nominal value at 24 V DC

Active level U

Inactive level U

A

I

0 V to +5 V

> (U

- 11 V)

PF

Input current

Active level I

Inactive level I

A

I

1.3 mA to 6 mA

0 mA to 1.2 mA

Input delay

t

ON

t

OFF

< 200 μs

< 200 μs

5.6.2 Diagnostic and status messages

Table 5-11:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

11 Green Status of channel 1 = "1"-

Off Status of channel 1 = "0"

21 Green Status of channel 2 = "1"

Off Status of channel 2 = "0"

14 Green Status of channel 3 = "1"

Off Status of channel 3 = "0"

24 Green Status of channel 4 = "1"

Off Status of channel 4 = "0"

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules

5-21

Digital input modules

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5.6.3 Module parameters

None

5.6.4 Base modules

Figure 5-27:
Base module
BL20-S4T-SBBS

Figure 5-28:

Base module
BL20-S6T-SBBSBB

 with tension clamp connection

BL20-S4T-SBBS
BL20-S6T-SBBSBB

 with screw connection

BL20-S4S-SBBS
BL20-S6S-SBBSBB

D300717 1211 - BL20 I/O modules5-22

Digital input module, 4DI, 24 V DC, negative switching (sourcing)

23

22

21

13

12

11

SS

SS

--

2414

26

25

24

23

22

21

16

15

14

13

12

11

S

S

S

S

+

+

+

+

–

–

–

–

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5.6.5 Wiring diagrams

Figure 5-29:
Wiring diagram
BL20-S4x-SBBS

Figure 5-30:
Wiring diagram
BL20-S6x-SBBSBB

D300717 1211 - BL20 I/O modules

5-23

Digital input modules

Logic

24 Module supplyV DC

5 Module busV DC

Galvanic isolation

Filter Filter Filter Filter

24 V DC

GND

Field

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5.7 Digital input module, 4DI, NAMUR

Figure 5-31:

BL20-4DI-NAMUR

Figure 5-32:
Block diagram

D300717 1211 - BL20 I/O modules5-24

Digital input module, 4DI, NAMUR

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5.7.1 Technical data

Table 5-12:
Technical data

Designation BL20-4DI-NAMUR

Number of channels 4

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

IN

NAMUR

(input)

MB

L

L

24 V DC

≤ 30 mA

≤ 40 mA

sitch-on threshold ≥ 1,74 mA

sitch-off threshold ≤ 1,45 mA

IN

WB

sitch-on threshold ≤ 0,08 mA

sitch-off threshold ≥ 0,12 mA

IN

SC

sitch-on threshold ≥ 6,2 mA

sitch-off threshold ≤ 5,9 mA

Isolation voltage

U

(module bus/ filed) 2500 VDC

TMB

U

(field supply/ FE) 1000 VDC

FE

5.7.2 Diagnostic and status messages

Table 5-13:
LED indicators

LED Display Meaning Remedy

DIA Red,

Diagnostics pending

flashing,

0.5 Hz

Red Module bus communication

failure

Off No error messages or

diagnostics

11 to 24 Green Status of channel x= "1"

Red Short circuit or open circuit

Off Status of channel x= "0"

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules

5-25

Digital input modules

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This module has the following diagnostic data:

 "Overcurr./short circuit sensor x"

 "Open circuit sensor x"

5.7.3 Module parameters

Table 5-14:
Module
parameters

AStandard

parameter value

Parameter name Value

Digital input x normal

A

inverted

Input filter x deactivate

A

activate

Short-circuit monitoring x deactivate

A

activate

Short circuit diagnosis x deactivate

A

activate

Open circuit monitoring x deactivate

A

activate

Open circuit diagnosis x deactivate

A

activate

Input on diagnostic x output substitute value

hold current value

A

Substitute value on diag x off

on

A

D300717 1211 - BL20 I/O modules5-26

Digital input module, 4DI, NAMUR

23

22

21

13

12

11

2414

2111

++

++

--

--

Bit 0

Bit 1

Bit 2

Bit 3

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5.7.4 Base modules

Figure 5-33:
Base module
BL20-S4T-SBBS

 with tension clamp connection

BL20-S4T-SBBS

 with screw connection

BL20-S4S-SBBS

5.7.5 Wiring diagrams

Figure 5-34:
Wiring diagram
BL20-S4x-SBBS

D300717 1211 - BL20 I/O modules

5-27

Digital input modules

Logic

24 V DC module supply

5 V DC module bus

Field

Filter Filter Filter

24 V DC

GND (24 V DC)

1

789

10 ...

...

5 V DC

GND(5 V DC)

8 x

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5.8 Digital input module, BL20 Economy, 8DI, 24 V DC, positive switching (sinking)

Figure 5-35:

BL20-E-8DI-24VDC-P

Figure 5-36:
Block diagram

D300717 1211 - BL20 I/O modules5-28

Digital input module, BL20 Economy, 8DI, 24 V DC, positive switching (sinking)

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5.8.1 Technical data

Table 5-15:
Technical data

AThe total current

which is needed
for every module
is the sum of all
partial currents.

Designation BL20-E-8DI-24VDC-P

Number of channels 8

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

24 V DC

1,5 mA A

< 30 mA

Input voltage, nominal value at 24 V DC

Low level U

High level U

L

H

- 30 V to +5 V

11 V to 30 V

Input current

Low level I

High level I

L

H

-1 mA to 1.5 mA

2 mA to 5 mA

Input delay

t

ON

t

OFF

< 100 μs

< 200 μs

Isolation voltage

Module bus/ Channels 500 V

5.8.2 Diagnostic and status messages

Table 5-16:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

1 Green Status of channel 1 = "1"-

Off Status of channel 1 = "0"

... ... ...

8 Green Status of channel 8 = "1"

Off Status of channel 8 = "0"

eff

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules

5-29

Digital input modules

1

10

9

8

7

6

5

4

3

2

24 V DC

S

S

S

S

S

S

S

S

1

10

9

8

7

6

5

4

3

2

24 V DC

S

S

S

S

S

S

S

S

GND

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5.8.3 Wiring diagrams

Figure 5-37:
Wiring diagram

Figure 5-38:
Wiring diagram
with sensor
supply

D300717 1211 - BL20 I/O modules5-30

Digital input module, 16DI, 24 V DC, positive switching (sinking)

Logic

24 Module supplyV DC

5 Module busV DC

Galvanic isolation

Field

Filter 16

Filter 1

24 V DC

GND

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5.9 Digital input module, 16DI, 24 V DC, positive switching (sinking)

Figure 5-39:

BL20-16DI-24VDC-P

Figure 5-40:
Block diagram

D300717 1211 - BL20 I/O modules

5-31

Digital input modules

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5.9.1 Technical data

Table 5-17:
Technical data

Designation BL20-16DI-24VDC-P

Number of channels 16

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

24 V DC

≤ 40 mA

< 45 mA

Power loss of the module, typical < 2.5 W

Input voltage, nominal value at 24 V DC

Low level U

High level U

L

H

- 30 V to +5 V

15 V to 30 V

Input current

Low level I

High level I

L

H

0 mA to 1.5 mA

2 mA to 10 mA

Input delay

t

ON

t

OFF

< 200 μs

< 200 μs

5.9.2 Diagnostic and status messages

Table 5-18:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

11 Green Status of channel 1 = "1"-

Off Status of channel 1 = "0"

21 Green Status of channel 2 = "1"

Off Status of channel 2 = "0"

. . .

161 Green Status of channel 16 = "1"

Off Status of channel 16 = "0"

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules5-32

Digital input module, 16DI, 24 V DC, positive switching (sinking)

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5.9.3 Module parameters

None

5.9.4 Base modules

Figure 5-41:
Base module
BL20-B3T-SBB

Figure 5-42:

Base module
BL20-B4T-SBBC

 with tension clamp connection

BL20-B3T-SBB
BL20-B4T-SBBC

 with screw connection

BL20-B3S-SBB
BL20-B4S-SBBC

D300717 1211 - BL20 I/O modules

5-33

Digital input modules

163

162

161

153

151

23

22

21

13

12

11

S

–

+

S

–

+

152

23 163

22 162

21 161

13 153

12 152

11 151

SS

––

++

PE PE

24 16414 154

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5.9.5 Wiring diagrams

Figure 5-43:
Wiring diagram
BL20-B3x-SBB

Figure 5-44:
Wiring diagram
BL20-B4x-SBBC

D300717 1211 - BL20 I/O modules5-34

Digital input module, BL20 Economy, 16DI, 24 V DC, positive switching (sinking)

11516

...

. . .

GND (5 V DC)
5 V DC

GND

L

UL (24 V DC)

16 x

5VDC

Filter Filter Filter

Logic

Field

Module bus

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5.10 Digital input module, BL20 Economy, 16DI, 24 V DC, positive switching (sinking)

Figure 5-45:

BL20-E-16DI-24VDC-P

Figure 5-46:
Block diagram

D300717 1211 - BL20 I/O modules

5-35

Digital input modules

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5.10.1 Technical data

Table 5-19:
Technical data

AThe total current

which is needed
for every module
is the sum of all
partial currents.

Designation BL20-E-16DI-24VDC-P

Number of channels 16

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

24 V DC

3 mA A

< 25 mA

Input voltage, nominal value at 24 V DC

Low level U

High level U

L

H

- 30 V to +5 V

11 V to 30 V

Input current

Low level I

High level I

L

H

-1 mA to 1.5 mA

2 mA to 5 mA

Input delay

t

ON

t

OFF

< 150 μs

< 300 μs

Isolation voltage

Module bus/ Channels 500 V

5.10.2 Diagnostic and status messages

Table 5-20:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Off No error messages or

diagnostics

1 Green Status of channel 1 = "1"

Off Status of channel 1 = "0"

... ... ...

16 Green Status of channel 16 = "1"

Off Status of channel 16 = "0"

eff

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

–

D300717 1211 - BL20 I/O modules5-36

Digital input module, BL20 Economy, 16DI, 24 V DC, positive switching (sinking)

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5.10.3 Wiring diagrams

Figure 5-47:
Wiring diagram

Figure 5-48:
Wiring diagram
with sensor
supply

S

S

S

S

1

2

3

4

5

6

7

8

9

S

10

11

S

12

13

S

14

15

S

S

16

S

S

S

S

S

S

S

S

UL (24 V DC)

S

S

S

S

1

2

3

4

5

6

7

8

9

S

10

11

S

12

13

S

14

15

S

16

S

S

S

S

S

S

S

S

UL (24 V DC)

GND

L

D300717 1211 - BL20 I/O modules

5-37

Digital input modules

Logic

24 Module supplyV DC

5 Module busV DC

Galvanic isolation

Field

Filter 32

Filter 1

24 V DC

GND

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5.11 Digital input module, 32DI, 24 V DC, positive switching (sinking)

Figure 5-49:

BL20-32DI-24VDC-P

Figure 5-50:
Block diagram

D300717 1211 - BL20 I/O modules5-38

Digital input module, 32DI, 24 V DC, positive switching (sinking)

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5.11.1 Technical data

Table 5-21:
Technical data

Designation BL20-32DI-24VDC-P

Number of channels 32

Nominal voltage from supply terminal U

Nominal current from supply terminal I

Nominal current from module bus I

MB

L

L

24 V DC

< 30 mA

< 45 mA

Power loss of the module, typical < 4,2 W

Input voltage, nominal value at 24 V DC

Low level U

High level U

L

H

- 30 V to +5 V

15 V to 30 V

Input current

Low level I

High level I

L

H

< 1.5 mA

2 mA to 10 mA

Input delay

t

ON

t

OFF

< 200 μs

< 200 μs

D300717 1211 - BL20 I/O modules

5-39

Digital input modules

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5.11.2 Diagnostic and status messages

Table 5-22:
LED indicators

LED Display Meaning Remedy

DIA Red Module bus communication

failure

Check if more than two adjoining
electronics modules have been pulled.
Check the power supply to the module
bus.

Off No error messages or

–

diagnostics

11 Green Status of channel 1 = "1"

Off Status of channel 1 = "0"

...

161 Green Status of channel 16 = "1"

Off Status of channel 16 = "0"

...

14 Green Status of channel 17 = "1"

Off Status of channel 17= "0"

164 Green Status of channel 32 = "1"

Off Status of channel 32= "0"

5.11.3 Module parameters

None

5.11.4 Base modules

Figure 5-51:

Base module
BL20-B6T-SBBSBB

 with tension clamp connection

BL20-B6T-SBBSBB

D300717 1211 - BL20 I/O modules5-40

Digital input module, 32DI, 24 V DC, positive switching (sinking)

26

25

24

23

22

21

16

15

14

13

12

11

S

S

–

–

+

+

166

165

164

163

162

161

156

155

154

153

152

151

S

–

+

S

–

+

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 with screw connection

BL20-B6S-SBBSBB

5.11.5 Wiring diagrams

Figure 5-52:

Wiring diagram BL20­B6x-SBBSBB

D300717 1211 - BL20 I/O modules

5-41

Digital input modules

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D300717 1211 - BL20 I/O modules5-42