Pilz PSEN enc s2 eCAM User Manual

Operating Manual PSSu H m F DP ETH SD

Operating Manual PSSu H m F DP ETH SD

PSEN enc m1 eCAM, PSEN enc m2 eCAM
PSEN enc s1 eCAM, PSEN enc s2 eCAM

Position Monitoring

Operating Manual — No. 1002327-EN-04

This document is a translation of the original document.

All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for internal purposes.

Suggestions and comments for improving this documentation will be gratefully received.

Pilz®, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®, SafetyEYE®,
SafetyNET p®, the spirit of safety® are registered and protected trademarks of
Pilz GmbH & Co. KG in some countries.

SD means Secure Digital.

Preface

Contents

Contents

Contents .................................................................................................................. 1

1 General ................................................................................................................. 3

1.1 Scope ...................................................................................................................................... 3

1.2 Applied directives and standards ............................................................................................ 4

1.3 General function description ................................................................................................... 5

1.3.1 Main features .......................................................................................................... 5

1.3.2 Overall system overview ......................................................................................... 6

2 Essential safety information ............................................................................... 7

2.1 Definition of symbols and instructions .................................................................................... 7

2.2 General hazards when using the product ............................................................................... 8

2.3 Intended use ........................................................................................................................... 9

2.4 Warranty and liability .............................................................................................................. 10

2.5 Organisational measures ........................................................................................................ 11

2.6 Selection and qualification of personnel; fundamental obligations ......................................... 11

2.7 Safety information ................................................................................................................... 12

3 Transport / storage .............................................................................................. 14

4 Assembly .............................................................................................................. 15

4.1 Solid shaft version PSEN enc m2 eCAM ................................................................................ 15

4.1.1 Requirements .......................................................................................................... 15

4.2 Hollow shaft version PSEN enc m1 eCAM ............................................................................. 17

4.2.1 Requirements .......................................................................................................... 17

4.2.2 Dowel pin ................................................................................................................ 19

English

5 Installation / Preparation for commissioning .................................................... 21

5.1 EMC requirements .................................................................................................................. 21

5.2 SSI communication mode ....................................................................................................... 23

5.3 SSI, RS422 communication technology ................................................................................. 24

5.4 Cable specification .................................................................................................................. 26

5.5 Connection .............................................................................................................................. 27

5.5.1 Supply voltage, X1 .................................................................................................. 28

5.5.2 Measuring systems, X2 .......................................................................................... 29

5.6 Shield connection ................................................................................................................... 30

5.7 Count direction ........................................................................................................................ 34

5.8 SSI interface ........................................................................................................................... 35

5.9 Incremental interface .............................................................................................................. 37

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Contents

5.10 LED status display ................................................................................................................ 39

6 SSI format ............................................................................................................. 40

6.1 Sign of life counter .................................................................................................................. 40

English

7 Replacing the measuring system ....................................................................... 41

8 Technical details ................................................................................................. 43

5.9.1 Signal characteristic of the incremental interface ................................................... 37

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General

1 General

1.1 Scope

This operating manual includes the following topics:

● General function description

● Essential safety information with details of intended use

● Characteristic data

● Assembly

● Installation/commissioning

● SSI interface

This operating manual applies exclusively to the following measuring systems with
SSI interface:

● PSEN enc m1 eCAM

● PSEN enc m2 eCAM

● PSEN enc s1 eCAM

● PSEN enc s2 eCAM

The products are labelled via nameplates and form part of a system.

English

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General

1.2 Applied directives and standards

The measuring systems PSEN enc m1 eCAM and PSEN enc m2 eCAM have been developed,
designed and manufactured in compliance with the applicable European and international standards,

English

directives and regulations.

Directives

- 2004/108/EC (L 390/24) EMC Directive

EMC; Immunity in accordance with EN 61000-6-2:2005, industrial environment:

- DIN EN 61000-4-2:2009 Electrostatic discharge, ESD

- DIN EN 61000-4-3:2008 High frequency electromagnetic fields

- DIN EN 61000-4-4:2005 Fast transient electrical disturbances, burst

- DIN EN 61000-4-5:2007 Surge voltages

- DIN EN 61000-4-6:2009

EMC; Emissions in accordance with EN 61000-6-3:2007, residential environment:

- EN 55022:2006 Disturbance field strength, 30 MHz - 1 GHz

- EN 55022:2006 Interference voltage, < 30 MHz

- DIN EN 61326-3-2:2008

Environmental influences

- DIN EN 60068-2-6:2008 Sinusoidal vibration

- DIN EN 60068-2-64:2009 Broadband noise (digitally controlled)

- DIN EN 60068-2-29:1995 Shock and continuous shock tests

- DIN EN 60529:2000 Degrees of protection, IP code

Other requirements

- VDE 0100 Erection of low voltage installations

Conducted disturbances,
induced by high frequency fields

Immunity requirements for safety-related systems and
for equipment

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General

1.3 General function description

The rotary measuring system

• PSEN enc mx eCAM is an absolute multi-turn position measuring system with

synchronous serial interface (SSI).

• PSEN enc sx eCAM is an absolute single-turn position measuring system with

synchronous serial interface (SSI).

The measuring system consists of a redundant, dual-channel system, in which
optical and magnetic sensing units are arranged on a drive shaft, designed as a
hollow shaft or solid shaft.

1.3.1 Main features

● SSI interface, to output data from measuring channel 1

● SSI interface, to output data from measuring channel 2

● Measuring channel 1:

- Single-turn: optical single-turn sensing via code disk (transmitted light)

- Multi-turn: optical single-turn sensing via code disk (transmitted light) and
magnetic multi-turn sensing

● Measuring channel 2:

- Single-turn: magnetic single-turn sensing

- Multi-turn: magnetic single and multi-turn sensing

● Additional incremental interface

● Mechanically, the two systems are connected only by the common drive shaft and

the housing

● Measuring channels have a common voltage terminal, but are electrically isolated
internally via two separate power supplies

● A common drive shaft

● 2 Installation Types:

- Hollow shaft version: PSEN enc m1 eCAM and PSEN enc s1 eCAM

- Solid shaft version: PSEN enc m2 eCAM and PSEN enc s2 eCAM

The optical system has greater accuracy due to the technology.

The magnetic sensing system is a fully-fledged second measuring channel and
operates independently from the first measuring channel. The two measuring systems
have their own SSI interfaces, which transmit the same data format.

The data from measuring channel 1 is also output via an incremental interface.

English

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General

1.3.2 Overall system overview

English

A

Measuring channel 1, single-turn and multi-turn

● Optical detection of the number of steps/revolution

● Max. 8192 steps/revolution, accuracy: 13 Bit

● Synchronous serial interface (SSI)

● Incremental signals for position feedback

B

Measuring channel 1, multi-turn

● Magnetic detection of the number of revolutions

● Max. 4096 revolutions

● Synchronous serial interface (SSI)

C

Measuring channel 2, single-turn and multi-turn

● Magnetic detection of the number of steps/revolution

● Max. 8192 steps/revolution, accuracy: 8 Bit

● Synchronous serial interface (SSI)

D

Measuring channel 2, multi-turn

● Magnetic detection of the number of revolutions

● Max. 4096 revolutions

● Synchronous serial interface (SSI)

optische Abtastung

Antrieb

Fig. 1: System schematic

Inkremental-

Interface

SSI

Welle

Anschlussklemme

N

SSI

S

magnetische Abtastung

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Essential safety information

2 Essential safety information

2.1 Definition of symbols and instructions

DANGER!

This means that death or serious injury will occur if the
relevant preventive measures are not taken.

WARNING!

This means that death or serious injury can occur if the
relevant preventive measures are not taken.

English

CAUTION!

This means that a minor injury can occur if the relevant
preventive measures are not taken.

NOTICE

This means that material damage can occur if the relevant
preventive measures are not taken.

INFORMATION

This indicates important information or features and
application tips for the relevant product.

This means that the relevant ESD protective measures must
be considered in accordance with DIN EN 100 015-1.

(Equipotential bonding between the body and the unit or
housing earth via a high impedance resistor (approx. 1
MOhm) e.g. using a standard ESD arm band).

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Essential safety information

2.2 General hazards when using the product

English

The product, described below as the measuring system, is manufactured using
state-of-the-art technology. Nevertheless, use of the system outside its intended

purpose may pose a risk to the life and limb of the user or third-party or
adversely affect the measuring system and other material assets!

The measuring system should only be used when in perfect working order, in
accordance with its intended use, in awareness of safety measures and hazards and
in compliance with the operating manual! In particular, errors that could adversely
affect safety must be rectified without delay!

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Essential safety information

2.3 Intended use

The measuring system can be used to detect angular movement and to prepare
measured data for control systems within plants.

Intended use includes:

● Compliance with all the instructions in this operating manual

● Compliance with the information on the nameplate and any prohibition or

instruction labels on the measuring system

● Compliance with the operating manual provided by the machine or plant
manufacturer

● Operation of the measuring system within the limit values stated in the technical
details

● Assurance that the failsafe processing unit (control system) fulfils all the required
safety functions

● Compliance with and use of the check list in the Appendix

● Assurance that the measuring system is mounted safely on the driving axis

In particular, the system shall not be used:

English

● In environments with an explosive atmosphere

● For medical purposes

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Essential safety information

2.4 Warranty and liability

English

All claims to warranty and liability will be rendered invalid if

● The product was used contrary to the purpose for which it is intended

● Damage can be attributed to not having followed the guidelines in the manual

● Operating personnel are not suitably qualified

● Any type of modification has been made (e.g. exchanging components on the

PCB boards, soldering work etc.).

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Essential safety information

2.5 Organisational measures

● The operating manual must always be kept ready-to-hand at the location where
the measuring system is used

● In addition to the operating manual there are also generally applicable legal and
other binding regulations regarding accident prevention and environmental
protection, which must be observed and communicated.

● The respective national, local and plant-specific provisions and requirements must
be observed and communicated

● It is the responsibility of the operator to advise staff of any special operational
features and requirements

● Before starting work, any staff charged with operating the measuring system must
have read and understood the operating manual, in particular the chapter entitled
“Essential safety information”.

● The nameplate and any prohibition or instruction labels on the measuring system
must always be maintained in a legible condition.

● No mechanical or electrical modifications may be made to the measuring system
except for those expressly described in the operating manual.

● Repairs may only be made by the manufacturer, or by a body or person
authorised by the manufacturer.

English

2.6 Selection and qualification of personnel; fundamental obligations

● All work on the measuring system must only be carried out by qualified technical
personnel.
Qualified personnel are those who have been authorised by those responsible for
plant safety to carry out the necessary work, based on their training, experience
and instruction, as well as their knowledge of the relevant standards, provisions,
accident prevention regulations and operating conditions. They are able to identify
and avoid potential hazards.

● For a definition of "Qualified personnel" you can also refer to the standards VDE
0105-100 and IEC 364 (sources: Beuth Verlag GmbH, VDE Verlag GmbH, for
example).

● Responsibility for assembly, installation, commissioning and operation must be
clearly defined. There is an obligation to supervise trainees or apprentices.

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Essential safety information

2.7 Safety information

English

Please note:

– Wiring work should only be carried out when the supply voltage is

switched off; the same applies when opening and closing electrical
connections.

– Do not undertake any welding operations if the measuring system is

already wired / switched on.

– An appropriate heating/cooling measure should be used at the

installation site to prevent the ambient temperature exceeding or falling
below the permitted limit values.

– The measuring system must be installed so that direct moisture cannot

affect the measuring system.

– Appropriate ventilation/venting or heating/cooling measures at the

installation site must prevent values falling below the dew point
(condensation).

– If an overvoltage of >36 VDC is applied inadvertently, the measuring system

must be inspected on site and the reasons/circumstances stated.

– Checks must examine the potential hazards arising from interaction

with other systems and devices which are or will be installed in the
vicinity. It is the user’s responsibility to take appropriate measures.

– The supply voltage must be protected with a fuse appropriate for the

cable cross section.

– Cables must be suitable for the relevant temperature range.

– The measuring system should not be operated if it is defective.

– Ensure that the installation environment is protected from aggressive

media (acids etc.).

– Shocks to the shaft (e.g. hammer blows) should be avoided during

installation.

– The measuring system must not be opened.

– The nameplate specifies the technical properties of the measuring

system. If the nameplate is no longer legible or is missing altogether,
the measuring system must no longer be put into service.

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Essential safety information

The measuring system contains electrostatically sensitive
assemblies and components, which can be damaged if handled
incorrectly.

Avoid finger contact with the measuring system connection contacts and
apply the relevant ESD protective measures.

Disposal

If the device is to be disposed of after its service life, the applicable
country-specific regulations must be observed.

English

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Transport / storage

3 Transport / storage

English

● Transport instructions

– Do not drop the device or expose it to heavy impact!

The device contains an optical system.

– Only the original packaging should be used!

Inappropriate packaging material can result in the device becoming
damaged in transit.

● Storage

– Storage temperature: -30 to +80℃

– Store in a dry place

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Assembly

4 Assembly

4.1 Solid shaft version

The measuring system is connected to the drive shaft via an elastic coupling. The
coupling absorbs any deviations in the axial and radial direction between the
measuring system and drive shaft. This prevents excessive load on the bearing.
The centering collar with selective fit is used for centering in relation to the shaft. The
device is fixed to the machine using three screws in the flange.
All the fixing screws must be secured to stop them coming loose unintentionally.

4.1.1 Requirements

As the installation is application-dependent, the following instructions do not
claim to be exhaustive.

English

 An appropriate coupling with positive-locking connection must be used in

the application.

 The instructions and installation specifications provided by the coupling

manufacturer must be observed.

 In particular you must ensure that

– the coupling is suitable for the specified speed and the potential axial

offset

– the device must be installed on a greaseless shaft

– the coupling and measuring system must not have an axial load

– the clamping screws must be tightened with the torque defined by the

coupling manufacturer

– the coupling screws must be secured to stop them coming loose

unintentionally.

 The coupling fixing should prevent axial slippage of the measuring

system on the drive shaft, see Figure 2, 1 .

 Positive locking using a parallel key/groove combination (Fig. 2, 2 )

should prevent radial slippage of the measuring system on the drive
shaft; a coupling with groove should be used for this purpose.

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Assembly

English

Fig. 2: Flange assembly

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Assembly

4.2 Hollow shaft version

4.2.1 Requirements

English

As the installation is application-dependent, the following instructions do not
claim to be exhaustive.

 The measuring system should be installed on a greaseless shaft.

 The clamping ring fixing should prevent axial slippage of the measuring

system on the drive shaft, see Figure 3.

 Additional measures may be required to prevent axial slippage of the

measuring system.

 The clamping of the measuring system must not have an axial load.

 The screw on the clamping ring must be tightened to 3 Nm using a

torque wrench.

 The screw on the clamping ring must be secured to stop it coming loose

unintentionally.

 Positive locking using a parallel key/groove combination should prevent

radial slippage of the measuring system on the drive shaft; the
measuring system must be fixed to the drive side using a dowel pin, see
Fig. 4.

Fig. 3: Friction locking

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Assembly

English

Fig. 4: Positive locking

Fig. 5: Requirements of the shaft mounting

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Assembly

4.2.2 Dowel pin

Simultaneous rotation of the measuring system, caused by the resulting torque, is
prevented by a dowel pin on the machine side. The measuring system has a 6 mm
deep 4K7 groove insertion on the back to hold the dowel pin. The dowel pin must
reach at least 4 mm into the groove insertion.

English

Fig. 6: Using a dowel pin to prevent simultaneous rotation

When inserting the measuring system, position it so that the dowel pin is seated
correctly in the groove insertion. By tightening the clamping ring with the Allen key, the
measuring system is protected against slippage on the shaft.

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Assembly

English

Fig. 7: Assembly schematic

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Installation / Preparation for commissioning

5 Installation / Preparation for commissioning

5.1 EMC requirements

CAUTION!

Invalid measurement values due to radiated and
conducted interference!

• Radiated interference from hand-held radios, lightning

strikes on the network, mobile phones and emissions from
individual devices can cause the measuring system to
malfunction.

English

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Installation / Preparation for commissioning

English

• In particular, sources of conducted interference such as frequency-

controlled drives (circuit feedback) have a negative effect on the function of
the measuring system.

 The 24 V power supplies must comply with SELV/PELV.
 The shielding effect of cables must also be guaranteed after

installation (bending radius!) and after changing connectors. If in
doubt, use a more flexible cable with a higher current carrying
capacity.

 For the drive/motor cabling, use a 5-core cable on which the PE

conductor is separate from the N-conductor (TN network). This will
largely prevent equipotential bonding currents and the development of
interference.

 Shielded, stranded data cable must be used to make the system highly

resistant to electromagnetic interference. Where possible, the shield
should be connected to the protective earth at both ends and with
good conductivity using large screen clamps. Only if the machine earth
is subjected to heavy interference in comparison with the control
cabinet earth should the shield only be earthed at one end in the
control cabinet.

 Equipotential bonding measures must be provided for the whole of the

plant’s processing chain.

 Power and signal cables should be laid separately.
 Comply with the manufacturer’s instructions when installing converters

and shielding the power cables between the frequency converter and
motor.

 The energy supply should be adequately dimensioned.
 The measuring system should be separated or segregated from

potential interfering transmitters.

 Use of filters should be envisaged.
 Internal and external protection against lightning should be considered.
 The plant installer must adapt the cable routing to local conditions.

Compliance with the relevant standards and directives is essential to

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guarantee safe, interference-free operation!

In particular, compliance with the applicable EMC Directive and shielding /
earthing guidelines should be guaranteed!

Installation / Preparation for commissioning

5.2 SSI communication mode

SSI mode is a synchronous serial communication mode for the position of the
measuring system. By using the RS422 interface for communication, sufficiently high
transmission rates can be achieved.

The measuring system receives a sequence of clock signals from the data receiver
(control system) and responds with the current position value, which is transmitted
serially and synchronously with the sent clock pulse.

As data transfer is synchronised by the start of the clock signals, it is not necessary to
use single-step codes such as Gray code, for example.

The data signals Data+ and Data– are sent using cable transmitters (RS422). The
clock signals Clock+ and Clock- are received via optocouplers to protect against
damage resulting from interference, potential differences or reverse polarity.

+5V

Opto-Koppler

BAV99

65

English

Ω

SSI-Clock+

C

N.C.

GND

C

Fig. 8: SSI principle input circuit (Key: Opto-Koppler – Optocoupler)

Data+

RS422

Data-

Fig. 9: SSI output circuit

2.2 nF

65

Ω

SSI-Clock-

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Installation / Preparation for commissioning

5.3 SSI, RS422 communication technology

English

RS422 communication requires one cable pair for the signals Data+ and Data– and
one cable pair for the signals Clock+ and Clock–.

The serial data is transmitted without reference to earth as a voltage difference
between two corresponding cables.
The receiver simply evaluates the difference between two cables, so that common­mode interference on the transmission line does not corrupt the usable signal.
By using shielded stranded pair cable, data transmission can be realised over
distances of up to 500 metres at a frequency of 100 kHz.
Under load, RS422 transmitters provide output levels of ± 2 V between the two
outputs; the receivers still recognise levels of ± 200 mV as a valid signal.

Differential signal (A-B)

Idle signal = 3 V

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Installation / Preparation for commissioning

Idle signal = 2 V

English

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Installation / Preparation for commissioning

5.4 Cable specification

English

Signal Cable specification

Data+ / Data–
(RS422+ / RS422–)

Min. 0.25 mm

2

, shielded stranded pair

Clock+ / Clock–
(RS422+ / RS422–)

A+ / A–

Min. 0.25 mm

2

, shielded stranded pair

B+ / B–

Supply
+24 VDC / 0 V

Min. 0.5 mm

2

, shielded stranded pair

The maximum cable length depends on the SSI clock frequency and cable
composition and should match the table below.
Please note that an additional delay time t

(Data+/Data–) of approx. 6 ns should be

v

calculated per metre of cable.

SSI clock frequency
[kHz]

Cable length [m]

810 750 570 360 220 120 100

Approx.

12.5

Approx.

25

Approx.

50

Approx.

100

Approx.

200

Approx.

400

Approx.

500

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Installation / Preparation for commissioning

5.5 Connection

Connection data, terminal block X1, X2:

– Version with slider mechanism

– Grid dimension: 2.5 mm

– Cable cross section, strand: 20-28 AWG

– Rated current: 6 A

Handling:

Terminal assignment:

English

– Move slider mechanism to “1”

– Insert strand

– Move slider mechanism to “2” and lock

Guide/clamp for the
cable strands

Fig. 10: Connection cover open

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Installation / Preparation for commissioning

5.5.1 Supply voltage, X1

English

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NOTICE

Risk of undetected damage to the internal
electronics due to incorrect overvoltages!

• If an overvoltage of >36 VDC is applied inadvertently,

the measuring system must be inspected on site.

 The measuring system must be taken out of

service immediately

 If returning the measuring system, the reasons or

circumstances under which the overvoltage
occurred should be stated

 The power supply must satisfy the requirements

in accordance with SELV/PELV (IEC 60364-4­41:2005)

PIN Signal Description

1 + 24 VDC (11…28 VDC) Supply voltage
2 + 24 VDC (11…28 VDC) Supply voltage
3 0 V GND
4 0 V GND

Optical sensing unit and magnetic sensing unit have a common supply, but are
electrically isolated internally via two separate power supplies.

PIN 1/2

through-connected

PIN 3/4

through-connected

Installation / Preparation for commissioning

5.5.2 Measuring systems, X2

PIN Signal Description

N.C.

1
2 INK A– Channel A –, RS422
3 INK A+ Channel A +, RS422

N.C.

4
5 INK B– Channel B –, RS422
6 INK B+ Channel B +, RS422
7 SL_m – Data –, measuring channel 1, differential RS422
8 SL_m + Data +, measuring channel 1, differential RS422
9 MA_m – Clock –, measuring channel 1, differential RS422

10 MA_m + Clock +, measuring channel 1, differential RS422
11 SL_s – Data –, measuring channel 2, differential RS422

12 SL_s + Data +, measuring channel 2, differential RS422
13 MA_s – Clock –, measuring channel 2, differential RS422
14 MA_s + Clock +, measuring channel 2, differential RS422

Do not connect!

English

Do not connect!

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29

Installation / Preparation for commissioning

5.6 Shield connection

English

The shield connection is made via special EMC-compliant cable screw connections, in
which the cable shield can be connected internally.

Cable screw connection assembly, type A

Pos. 1 Union nut

Pos. 2 Sealing insert

Pos. 3 Contact sleeve

Pos. 5 Screw socket

1. Trim the shield braid / shield foil to the dimension "X".

2. Slide the union nut (1) and sealing insert / contact sleeve (2) + (3) over the

cable.

3. Bend the shield braid / shield foil by approx. 90° (4).

4. Slide the sealing insert / contact sleeve (2) + (3) up to the shield braid / shield

foil.

5. Fit the screw socket (5) on the housing.

6. Push the sealing insert / contact sleeve (2) + (3) flush into the screw socket

(5).

7. Screw the union nut (1) to the screw socket (5).

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Installation / Preparation for commissioning

English

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31

Installation / Preparation for commissioning

English

Cable screw connection assembly, type B

Pos. 1 Union nut
Pos. 2 Clamping insert
Pos. 3 Inner O-ring
Pos. 4 Screw socket

1. Trim the shield braid / shield foil to the dimension "X" + 2 mm.

2. Slide the union nut (1) and clamping insert (2) over the cable.

3. Bend the shield braid / shield foil by approx. 90°.

4. Slide the clamping insert (2) up to the shield braid / shield foil and wrap the
braid back around the clamping insert (2), so that the braid goes over the
inner O-ring (3) but not over the cylindrical part or the torque supports.

5. Fit the screw socket (4) on the housing.

6. Push the clamping insert (2) into the screw sockets (4), so that the torque
supports fit into the lengthwise slots provided in the screw socket (4).

7. Screw the union nut (1) to the screw socket (4).

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Installation / Preparation for commissioning

1

English

2

3

4

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33

Installation / Preparation for commissioning

5.7 Count direction

English

DIP 1 DIP-Schalter 2 Count direction

OFF ON

ON OFF

M1

M2

Fig. 11: Setting the count direction

M1: Setting for measuring channel 1
M2: Setting for measuring channel 1

Permitted switch settings measuring channel 1/ measuring channel 2:

Increasing in clockwise direction, viewed towards the flange
connection

Decreasing in clockwise direction, viewed towards the flange
connection

NOTICE

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34

The count direction for measuring channel 1 and
measuring channel 2 must be set in opposite
direction!

Installation / Preparation for commissioning

A

5.8 SSI interface

NOTICE

Risk of damage to subsequent electronics due to
overvoltages caused by a missing earth reference
point!

In the rest condition, Data+ and Clock+ are high. This corresponds to the time before
Point (1) in the diagram below.
The first time the clock signal changes from high to low (1), the internal retriggerable
monoflop is set with the monoflop time t
The time t
off frequency is calculated from the sum of all the signal run times and is also limited
by the built-in filter circuits.

With each additional falling clock edge, the active status of the monoflop is extended
by the time tM; this is the case by Point (4) at the latest.
By setting the monoflop (1), the bit-parallel data present on the internal parallel-serial
converter is stored in an input latch of the shift register via an internally generated
signal. This ensures that the data does not change as the position value is
transmitted.

The first time the clock signal changes from low to high (2), the most significant bit
(MSB) of the device information is connected to the serial data output. With each
additional rising edge, the next lower value bit is moved to the data output.
When the clock sequence is complete, the data lines are held at 0 V (Low) for the
duration of the monoperiod tM (4). This is also used to calculate the minimum pause time
t
t

The data is read in by the evaluation electronics from the first rising clock edge. Based
on various factors, a delay time of t
measuring system moves the data to the output after the delay time t
a “Pause-1” is read in at Point (2). This must be rejected or can be used in conjunction
with a “0” after the LSB data bit for open circuit monitoring. The MSB data bit is not
read in until Point (3). For this reason, the number of clock pulses must always be one
higher (n+1) than the number of data bits to be transmitted.

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determines the lowest transmission frequency (T = tM / 2). The upper cut-

M

that must be maintained between two consecutive pulse sequences and amounts to 2 *

p

.

M

• If the earth reference point is missing entirely, e.g. 0 V

of the power supply is not connected, voltages equal
to the level of the supply voltage can occur at the
outputs of this interface.

n earth reference point must be guaranteed to be

•

present at all times.

.

M

>100 ns results, without cable. As a result, the

V

. For this reason,

V

35

English

Installation / Preparation for commissioning

p

p

English

t

p

Clock

Clock

Takt +

ulse

Pulse

Daten+

Data

Fig. 12: Typical SSI communication sequences

1 2

Takt+

Clock

ulse

Daten+

Data

intern

internal

Fig. 13: SSI communication format

re-triggerbares Monoflop

12 n

retriggerable monoflop

3

Monoflop time

Monoflopzeit

T

4

n+1

t

M

LSBMSB

t

V

High

Low

High

Low

High

Low

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Installation / Preparation for commissioning

A

5.9 Incremental interface

To output the absolute position, the standard version of the measuring system also
has an incremental interface in addition to the SSI interface.

• The measuring system checks the outputs on this interface for external voltage

sources. The measuring system is shut down if voltages > 5.7 V arise. In this
state, the measuring system behaves as though it were not connected.

• The interface is generally used for position feedback on motor control

applications.

NOTICE

Risk of damage to subsequent electronics due to
overvoltages caused by a missing earth reference
point!

English

• If the earth reference point is missing entirely, e.g. 0 V

of the power supply is not connected, voltages equal
to the level of the supply voltage can occur at the
outputs of this interface.

n earth reference point must be guaranteed to be

•

present at all times.

5.9.1 Signal characteristic of the incremental interface

A corresponding number of pulses is output while completing a revolution. To
evaluate the count direction, a 2nd signal sequence with 90° phase offset is output for
the controller.

On the standard version, the incremental resolution of the measuring system is 4096
pulses / revolution. There is no zero pulse.

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37

Installation / Preparation for commissioning

English

Measuring
system

single

Counter
evaluation

Fig. 14: Counter evaluation)

double

Edge evaluation

4096 pulses

4096 Counter pulses/rev.

8192 Counter pulses/rev.

16384 Counter pulses/rev. quadruple

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Installation / Preparation for commissioning

5.10 LED status display

English

Fig. 15: LED status display

Power LED, green CH1: Measuring channel 1, CH2: Safety system

OFF

ON Ready for operation, normal condition

Error LED, red CH1: Measuring channel 1, CH2: Safety system

OFF Ready for operation, no fault

ON

Supply voltage absent or outside the range 11…28 VDC,
hardware error

Fault condition; general fault indicator for faults which
result in the data output being shut down.

Exception:
If there is a fault in the incremental channel, the LED is

also ON, but the SSI remains operational.

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39

SSI format

6 SSI format

6.1 Multi-turn

English

6.2 Single-turn

Bit 0-11 Bit 12-24 Bit 25-39

MSB LSB

MT, 12 Bit ST, 13 Bit Err1, 1Bit Err2, 1 Bit SoL, 5 Bit 8 Bit

Multi-turn

resolution

224-213 2

Single-turn

resolution

12-20

2

Error bit

Measuring

channel 1

0

2

Error bit

Measuring

channel 2

0

2

Sign of life

counter

4-20

2

Reserved

7-20

Both measuring system channels use the same SSI data format.

Bit 0-12 Bit 13-16 Bit 17 Bit 18 Bit 19-23 Bit 24-31

MSB LSB

ST, 13 Bit 4 Bit Err1, 1Bit Err2, 1 Bit LZZ, 5 Bit 8 Bit

Single-turn

resolution

212-20 2

Both measuring system channels use the same SSI data format.

6.3 Sign of life counter

The 5-Bit sign of life counter is incremented based on the scanning procedures and is
inserted into the SSI telegram.

Place holder

3-20

2

INFORMATION

The sign of life counter is increased when the control system
has fetched the current position values and, internally, new
position values have been generated and provided. In other
words, if the sign of life counter has been incremented in
relation to the previous telegram, this guarantees that the
current data transmitted originates from a new position
scanning operation.

Error bit

Measuring

channel 1

0

2

Error bit

Meausuring

channel 2

Sign of life

counter

0

2

4-20

2

Reserved

7-20

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Replacing the measuring system

7 Replacing the measuring system

The following points must be noted when replacing the measuring system:

● The new measuring system must have the same item number as the system
being replaced. Any deviations from this must be cleared with Pilz.

● You must ensure that the count direction set via hardware switches on the new
measuring system matches the previous count direction.

● The new measuring system must be installed in accordance with the
specifications and requirements stated in the chapter entitled “Assembly”.

● The new measuring system must be connected in accordance with the
specifications stated in the chapter entitled “Connection/Shield connection”.

● When recommissioning the replaced measuring system, a protected test run must
be carried out to ensure the system functions correctly.

English

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41

English

Technical details

110 00Technical detailsTechnical details1-Technische Daten

Technical details

Electrical data

Supply voltage UB DC 24 V
Power consumption at U
Polarity protection yes
Scanning principle magnetic, optical

Absolute values, measuring channel 1

Interface SSI
Output driver RS422
Resolution per revolution 13 Bit
Number of revolutions 12 Bit No. 544021, 544022
Update rate 250 µs
Coding Binary

Absolute values, measuring channel 2

Interface SSI
Output driver RS422
Resolution per revolution 8 Bit
Number of revolutions 12 Bit No. 544021, 544022
Update rate 500 µs
Coding Binär

Incremental values

Interface TTL
Signal level 5 V
Number of increments 4096
Signal tracks A, /A, B, /B

Environmental data

Vibration to EN 60068-2-6
Frequency 55.0 - 2000.0 Hz
Max. acceleration 10g
Shock to EN 60068-2-27
Shock acceleration 60g
Shock time 6 ms
Continuous shock test 25g, 6ms
Ambient temperature -10 - 60 °C
Storage temperature -30 - 80 °C
Climatic suitability 98 %
Protection type EN 60529
Housing IP54

Mechanical data

Housing material Aluminium
Shaft design Hollow shaft No. 544011, 544021

Shaft diameter 10 mm No. 544012, 544022

Connection type Terminals
Connection direction radial
Angular acceleration 1E+04 rad/s²
Max. speed 3000 1/min No. 544011, 544021

Torque on start-up 0.006 Nm No. 544012, 544022

DC 3.6 W

B

Solid shaft No. 544012, 544022

20 mm No. 544011, 544021

6000 1/min No. 544012, 544022

0.060 Nm No. 544011, 544021

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42

Technical details

English

Mechanical data

Axial shaft load capacity 50 N No. 544012, 544022
Radial shaft load capacity 90 N No. 544012, 544022
Mechanical service life 3.9 x 10
Weight 850 g No. 544012, 544022

950 g No. 544011, 544021

10

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43

© Pilz GmbH & Co. KG, 2011

1002327-EN-04, 2013-05 Printed in Germany

...

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Please refer to our homepage
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are registered and protected trademarks

®

, the spirit of safety

®

, SafetyNET p

®

, SafetyEYE

®

, SafetyBUS p

®

, PVIS

®

, PSS

®

, PSEN

®

, Primo

®

, PNOZ

®

, PMI

®

Pilz GmbH & Co. KG
Felix-Wankel-Straße 2
73760 Ostfildern, Germany
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Telefax: [phone]
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Internet: www .pilz.com

, PMCprotego

®

, PIT

®

, Pilz

®

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of Pilz GmbH & Co. KG in some countries. We would point out that product features may vary from the details stated in this document, depending on the status at the time of publication and the scope

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