Rockwell Automation 1790D-4T0, 1790D-T4T0, 1790D-T4R0, 1790D-4R0 Installation Instructions Manual

Installation Instructions

DeviceNet Base RTD and
Thermocouple CompactBlock LDX I/O

Catalog Numbers 1790D-4R0, 1790D-4T0, 1790D-T4R0,
1790D-T4T0

Table of Contents

Top ic Pa ge

Important User Information 2

Environment and Enclosure 3

Prevent Electrostatic Discharge 3

North American Hazardous Location Approval 4

EDS File Requirements 4

Install the CompactBlock LDX I/O 5

Set the Node Address on the Base Block 5

Mount the Base Module 6

Wire the Terminal Block 8

Connect Field Wiring 9

Connect the DeviceNet Cable 13

I/O Memory Mapping 14

Interpret the Status Indicators 15

Specifications 16

2 DeviceNet Base RTD and Thermocouple CompactBlock LDX I/O

Important User Information

Solid-state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls
(Publication SGI-1.1

http://www.rockwellautomation.com/literature/

solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also
because of the wide variety of uses for solid-state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the
many variables and requirements associated with any particular installation, Rockwell Automation, Inc.
cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

available from your local Rockwell Automation sales office or online at

WARNING: Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or death,
property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to
personal injury or death, property damage, or economic loss. Attentions help you identify
a hazard, avoid a hazard and recognize the consequences.

) describes some important differences between

SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment (for example, drive or motor)
to alert people that surfaces may reach dangerous temperatures.

IMPORTANT Identifies information that is critical for successful application and understanding of

the product.

Publication 1790-IN011C-EN-P - January 2015

DeviceNet Base RTD and Thermocouple CompactBlock LDX I/O 3

Environment and Enclosure

ATTENTION: This equipment is intended for use in a Pollution Degree 2

industrial environment, in overvoltage Category II applications (as defined in
IEC publication 60664-1), at altitudes up to 2000 meters (6562 ft)
without derating.

This equipment is considered Group 1, Class A industrial equipment according
to IEC/CISPR Publication 11. Without appropriate precautions, there may be
potential difficulties ensuring electromagnetic compatibility in other
environments due to conducted as well as radiated disturbance.

This equipment is supplied as open-type equipment. It must be mounted within
an enclosure that is suitably designed for those specific environmental
conditions that will be present and appropriately designed to prevent personal
injury resulting from accessibility to live parts. The enclosure must have
suitable flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA, V2, V1, V0 (or equivalent) if
non-metallic. The interior of the enclosure must be accessible only by the use
of a tool. Subsequent sections of this publication may contain additional
information regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.
In addition to this publication, see:

• Industrial Automation Wiring and Grounding Guidelines, for additional
installation requirements, Allen-Bradley publication 1770-4.1

• NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure.

.

Prevent Electrostatic Discharge

ATTENTION: This equipment is sensitive to electrostatic discharge, which can

cause internal damage and affect normal operation. Follow these guidelines
when you handle this equipment:

• Touch a grounded object to discharge potential static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component boards.

• Do not touch circuit components inside the equipment.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging when not in use.

Publication 1790-IN011C-EN-P - January 2015

4 DeviceNet Base RTD and Thermocouple CompactBlock LDX I/O

North American Hazardous Location Approval

The following information applies when
operating this equipment in hazardous
locations:

Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for
use in Class I Division 2 Groups A, B, C, D, Hazardous
Locations and nonhazardous locations only. Each product is
supplied with markings on the rating nam eplate indicating
the hazardous location temperature code. When comb ining
products within a system, the most adverse temperature
code (lowest "T" number) may be used to help determine the
overall temperature code of the system. Combinations of
equipment in your system are subject to investigation by the
local Authority Having Jurisdiction at the time of
installation.

EXPLOSION HAZARD

• Do not disconnect equipment unless
power has been removed or the area is
known to be nonhazardous.

• Do not disconnect connections to this
equipment unless power has been
removed or the area is known to be
nonhazardous. Secure any external
connections that mate to this equipment
by using screws, sliding latches, threaded
connectors, or other means provided with
this product.

• Substitution of components may impair
suitability for Class I, Division 2.

• If this product contains batteries, they
must only be changed in an are a known to
be nonhazardous.

Informations sur l’utilisation de cet
équipement en environnements dangereux:

Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne
conviennent qu'à une utilisation en environnements de
Classe I Division 2 Groupes A, B, C, D dangereux et non
dangereux. Chaque produit est livré avec d es marquages sur
sa plaque d'identification qui indiquent le code de
température pour les environnement s dangereux. Lorsque
plusieurs produits sont combinés dans un système, le code
de température le plus défavorabl e (code de température le
plus faible) peut être utilisé pour déterminer le code de
température global du système. Les combinaisons
d'équipements dans le système sont sujettes à inspection
par les autorités locales qualifiées au moment de
l'installation.

RISQUE D’EXPLOSION

• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher l'équipement.

• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher les connecteurs.
Fixer tous les connecteurs externes reliés
à cet équipement à l'aide de vis, loquet s
coulissants, connecteurs filetés ou autres
moyens fournis avec ce produit.

• La substitution de composants peut rendre
cet équipement inadapté à une util isation
en environnement de Classe I, Division 2.

• S'assurer que l'environnement est classé
non dangereux avant de changer les piles.

EDS File Requirements

Current functionality of CompactBlock LDX I/O blocks require current modular EDS
file for RSNetWorx for DeviceNet™ version 3.0 or later software.

These files are easy to install and are available online at:

www.ab.com/networks/eds/

EDS files for blocks with matching catalog numbers (for both D-Shell and terminal block
versions) are the same. Thus, on the website and in RSNetWorx for DeviceNet, there is
only one EDS file for both versions of the blocks. For example, if you want the EDS file for
1790D-T8BV8B, use the EDS file labeled 1790D-8BV8B.

Publication 1790-IN011C-EN-P - January 2015

DeviceNet Base RTD and Thermocouple CompactBlock LDX I/O 5

Example: Node
Address is set at 11

Install the CompactBlock LDX I/O

Follow these steps to install the block:

• set the node address on the base block.

• mount the base block.

• wire the terminal blocks.

•connect field wiring.

• connect the DeviceNet cable.

These steps are explained in detail in the following procedures.

Set the Node Address on the Base Block

Each base block comes with its internal program set for node address 63. To reset the node
address, adjust the switches on the front of the block. The two switches are most
significant digit (MSD) and least significant digit (LSD). The switches can be set between
00 and 63.

The base block reads the rotary switches at power up only. Switch settings between 64 and
99 cause the block to use the last valid node address stored internally.

Node Address Example

The node address may also be set through RSNetWorx for DeviceNet or a similar
configuration tool. When software configuration is used for the node address, the switches
must be set between 64 and 99.

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6 DeviceNet Base RTD and Thermocouple CompactBlock LDX I/O

IMPORTANT

CompactBlock LDX

1790-16BVOX

DC INPUTS

EXPANSION UNIT

16 INPUTS-DCPOWER

0

7

DC INPUTS

8

15

95 mm
(3.74 in.)

41 mm
(1.6 in.)

Expansion
Cable
Cover

44252

Mount the Base Module

You can mount the base block to a panel or DIN rail. We recommend that you ground the
panel or DIN rail before mounting the block.

The RTD and thermocouple base blocks do not support any expansion
blocks.

WARNING: When used in a Class I, Division 2, hazardous location, this
equipment must be mounted in a suitable enclosure with the proper wiring
method that complies with the governing electrical codes.

Dimensions

Mount on a Panel

For panel mounting, use these steps.

1. Place the block against the panel where you want it mounted.

2. Gently pull and position the expansion cover to the left.

3. Place a center punch, nail, or similar device through the mounting holes in the

block and make two marks on the panel at the lower-left and upper-right corners
of the module.

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DeviceNet Base RTD and Thermocouple CompactBlock LDX I/O 7

Locking Lever

4. Remove the block and drill two holes in the panel to accommodate each of the
mounting screws.

5. Replace the block on the panel and place a screw through each of the two
mounting holes.

6. Tighten the screws until the block is firmly in place.

Mount on DIN Rail

For DIN-rail mounting, use these steps.

1. Hook the top slot of the base block over the DIN rail.

2. Pull down on the locking lever while pressing the base block against the rail.

3. Push up on the locking lever to secure the base block to the rail when the base

block is flush against the rail.

Publication 1790-IN011C-EN-P - January 2015

8 DeviceNet Base RTD and Thermocouple CompactBlock LDX I/O

Wire the Terminal Block

The following figures show how to wire the terminal blocks.

1790D-4R0 RTD Input Module D-Shell Wiring

CH1_B

10

29

CH1_B

10

29

NC

COM

13

COM

28

COM

28

NC

14

NC

9

NC

NC

27

COM

9

27

NC

15

NC

16

NC

CH2_A

8

COM

NC

8

NC

7

26

COM

CH2_A

7

26

NC

17

18

NC

CH2_B

25

CH2_B

NC

CH3_B

CH3_A

5

6

24

23

COM

COM COM COM

CH3_B

CH3_A

5

6

24

25

23

NC

NC NC NC

NC

19

20

NC

+24V

NC

NC

CH0_B

+24V

19

37

GND

18

36

GND

+24V

17

35

GND

NC

16

15

34

33

NC

NC

CH0_A

14

32

NC

13

COM

CH1_A

11

12

30

31

COM

COM

• Wire pins 17, 18, 19 to Field Power (+) 24V DC

• Wire pins 35, 36, 37 to Field Power (-) GND

1790D-4T0 Thermocouple Module D-Shell Wiring

+24V

NC

NC

CH0_B

+24V

19

37

GND

18

36

GND

+24V

17

35

GND

NC

16

15

34

33

NC

NC

CH0_A

14

32

NC

CH1_A

11

13

12

30

31

NC

NC

• Wire pins 17, 18, 19 to Field Power (+) 24V DC

• Wire pins 35, 36, 37 to Field Power (-) GND

1790D-T4RO RTD Input Module Terminal Block Wiring

+24V

CH1_A

CH0_A

1

3

2

GND

CH0_B

• Wire pin 1 to Field Power (+) 24V DC

• Wire pin 2 to Field Power (-) GND

5

4

CH1_B

COM

6

CH2_A

7

8

COM

CH3_A

9

10

CH2_B

11

12

CH3_B

NC

NC

NC

3

4

22

4

1

2

20

21

COM

NC

NC

NC

3

1

2

22

20

21

NC

Publication 1790-IN011C-EN-P - January 2015