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1791D-XXXX
User Manual
28 pgs859.41 Kb0
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Rockwell Automation 1791D-XXXX User Manual

Installation Instructions
Compact
Block
I/O for DeviceNet Modules
Series D
(Cat. No. 1791D-16B0, -16V0, -0V16P, -0B16P, -16B0X, -16V0X,
-0B16PX, -0V16PX, -8B8P, -4B0, -4B4P, -0B8P, -8V8P)
NOTE: The 1791D-4B0 module cannot be expanded.
CompactBlock I/O modules must be installed in a secondary enclosure. Base modules are equipped with 4 to 16 points and expansion modules are equipped with 16 I/O points.
Sinking or sourcing inputs are 24V dc IEC Type 3 compatible. Sinking or sourcing self-protected 24V dc outputs can provide up to 0.5 amp each.

Important User Information

Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards. In no event will Rockwell Automation be responsible or liable for indirect or consequential damage resulting from the use or application of these products.
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!
WARNING
ATTENTION
!
IMPORTANT
Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Rockwell Automation does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the
Application, Installation and Maintenance of Solid-State Control
(available from your local Rockwell Automation office), describes some important differences between solid-state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in whole or part, without written permission of Rockwell Automation, is prohibited.
Throughout this publication, notes may be used to make you aware of safety considerations. The following annotations and their accompanying statements help you to identify a potential hazard, avoid a potential hazard, and recognize the consequences of a
potential hazard:
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.
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Identifies information about practices or circumstances that can lead to personal injury or death, property damage or economic loss.
Identifies information that is critical for successful application and understanding of the product.
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ATTENTION
!
CompactBlock I/O for DeviceNet Modules Series D 3
Environment and Enclosure
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 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 "enclosed" equipment. It should not require additional system enclosure when used in locations consistent with the enclosure type ratings stated in the Specifications section of this publication. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings, beyond what this product provides, that are required to comply with certain product safety certifications.
See NEMA Standards publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosure. Also, see the appropriate sections in this publication, as well as the Allen-Bradley publication 1770-4.1 ("Industrial Automation Wiring and Grounding Guidelines"), for additional installation requirements pertaining to this equipment.
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ATTENTION
!

Installing CompactBlock I/O

Follow these steps, to install the 1791D I/O module:
1. Set the Node Address on the Base Module.
2. Mount the Block(s).
3. Connect the Input/Output Wires to the Block.
4. Connect the DeviceNet Cable.
5. Remove the terminal block.
6. Insert the terminal block.
7. Communicate with the 1791D Module.
These steps are explained in detail in the following procedures.
Preventing Electrostatic Discharge
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.
• If available, use a static-safe workstation.
• When not in use, store the equipment in appropriate
static-safe packaging.
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Set the Node Address on the Base Module

Each 1791D base module comes with its internal program set for node address 63. To reset the node address, adjust the switches located behind the door on top of the module. The two switches are most significant digit (MSD) and least significant digit (LSD).
The switches can be set between 00 and 63. Use the node adjusting tool provided in the package, or a small bladed screwdriver to rotate the switches.
The rotary switches are read at module power up only. Switch settings between 64 and 99 cause the module to use the last valid node address stored internally.
NODE ADDR
(00-63)
Example: Node Address is set at 62
0
9
1 8 7
6
2
3
4
5
The node address may also be set through RSNetWorx for DeviceNet™, DeviceNetManager™ or a similar configuration tool. When software configuration is used for the node address, the switches must be set between 64 and 99.
LSDMSD
0
1
9
8
7
6
2
3
4
5
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Mount the Block(s)

The base and expansion modules mount to a panel or DIN rail, which must be grounded before installing the module(s).
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!
WARNING
Base Module Mounting
You can install the CompactBlock base module on a panel or DIN rail.
When used in a Class I, Division 2, hazardous location, this equipment must be mounted in a suitable enclosure with proper wiring method that complies with the governing electrical codes.
Panel Mounting
1. Place the module against the panel where you want to mount
it.
2. Drill holes in the panel that are aligned with mounting holes
on the module.
3. Place screws through each of the 2 mounting holes and
tighten the screws until the module is firmly in place.
Base Module
141 mm
5.55 in
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41 mm
1.6 in
41673
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ATTENTION
!
DIN Rail Mounting
1. Hook top of slot over the DIN Rail.
2. Pull down on the locking lever while pressing the block
against the rail.
Locking Lever
90358
3. Push up on the locking lever to secure the block to the rail
when block is flush against the rail.
Connecting an Expansion Module to a Base Module
Expansion blocks should not be installed when power is applied to the base.
IMPORTANT
NOTE: 1791D-4B0 cannot be connected to expansion modules.
1. Remove the expansion covers from both the base and
expansion modules.
Make sure you carefully read the section “Communicate With the 1791D Module” on page 15 to change produce and consume data sizes.
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2. Position the expansion block with the proper spacing. See the
illustration below
Base Module Expansion Module
141 mm
5.55 in
.
25 mm
1 in
104 mm
4.09 in
41 mm
1.6 in
Expansion
3. Mount expansion module using panel or DIN rail mounting, as
described in the previous section.
4. Plug the expansion cable into both the base and expansion
modules.
IMPORTANT
The expansion cable can only be connected to the modules such that the red stripe on the cable is on top as shown below.
Red strip must be on top of ribbon
5. Replace the expansion covers on both modules.
41 mm
1.6 in
30358
30360
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CompactBlock I/O for DeviceNet Modules Series D 9
!
WARNING

Connect the Input/Output Wires to the Block

Two sets of VDC+ and GND power pins are located on each terminal (one for each bank of 8 points) except on the 1791D-4B0, -4B4P, and
-0B8P modules. The following figures show the wiring information for both sinking and sourcing wiring. Refer to the following table for the proper cable to use for your application.
Use supply wires suitable for 30°C above surrounding ambient.
Use Cable type
Input and output wiring
Output Wiring Diagram for 1791D-0B16P and 1791D-0B16PX Modules
OUT 0 OUT 2
V
DC
Up to 14AWG (2mm2) stranded (Cu) with 3/64 inch insulation
OUT 4
OUT 8OUT 6
OUT 10
V
DC
OUT 12 OUT 14
Not
Used
GND
OUT 1 OUT 3
OUT 5 OUT 7
GND
OUT 9
OUT 11 OUT 15OUT 13
+
Load
-
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