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1791P-XXXX
User Manual
32 pgs1.11 Mb0
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Rockwell Automation 1791P-XXXX User Manual

Installation Instructions
Compact
Block
Distributed I/O on
PROFIBUS DP Series D
(Cat. No. 1791P-16B0, -0B16P, -8B8P, -4B4P, -8V8P)
CompactBlock PROFIBUS DP modules must be installed in a secondary enclosure. Base modules are equipped with 8 to 16 points.
CompactBlock PROFIBUS DP provides sinking and sourcing inputs and outputs. Sinking inputs are 24V dc IEC Type 3 compatible. 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.
Publication 1791P-IN002B-EN-P - October 2003
2 CompactBlock Distributed I/O on PROFIBUS DP Series D
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:
WARNING
ATTENTION
IMPORTANT
Publication
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.
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.
1791P-IN002B-EN-P - October 2003
ATTENTION
CompactBlock Distributed I/O on PROFIBUS DP 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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1791P-IN002B-EN-P - October 2003
4 CompactBlock Distributed I/O on PROFIBUS DP Series D

Installing CompactBlock I/O

Follow these steps, to install the 1791P I/O module:
1. Set the Station Address on the Base Module.
2. Mount the Block(s).
3. Connect the Input/Output Wires to the Block.
4. Connect the PROFIBUS DP connector.
5. Select termination for the module.
6. Connect power to the module.
7. Remove the terminal block.
8. Insert the terminal block.
9. Communicate with the 1791P Module.
These steps are explained in detail in the following procedures.
Publication
1791P-IN002B-EN-P - October 2003
CompactBlock Distributed I/O on PROFIBUS DP Series D 5
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
ATTENTION
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.

Set the Station Address on the Base Module

To set the station address, lift the door containing the status LEDs on the top left side of the module. Adjust the switches located behind the door.
The rotary switches can be set between 00 and 99. Use the adjusting tool provided in the package, or a small bladed screwdriver to rotate the switches. The DIP switches are used for addresses between 100 and 125.
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1791P-IN002B-EN-P - October 2003
6 CompactBlock Distributed I/O on PROFIBUS DP Series D
The switches are read at module power up only.
View when looking into module.
3
2
10’s
1
4
100’s
DIP Switches
(100-125)
ON
0
9
1 2
1
0
9
1’s
5
6
8
7
3
2
4
5
6
8
7
Rotary Switches
Example: Node Address is set at 26
(00-99)
43112
DIP Switches
Address
Position 1 Position 2 10’s 1’s
0-99 0 0 0-9 0-9
100-125 1 0 0-2 0-5
100’s
Rotary Switches

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).
Base Module Mounting
You c a n install t h e Compact Block base module on a panel or DIN rail.
WARNING
Publication
1791P-IN002B-EN-P - October 2003
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.
CompactBlock Distributed I/O on PROFIBUS DP Series D 7
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 until the module is firmly in place.
Base Module
141 mm
5.55 in
Module
Status
Network
Status
Profibus DP
01234567
Allen-Bradley
01234567
CompactBlock I/O
8 INPUTS / 8 OUTPUTS - DC POWER
1791P-8V8P
41 mm
1.6 in
43115
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.
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8 CompactBlock Distributed I/O on PROFIBUS DP Series D
Connecting an Expansion Module to a Base Module
ATTENTION
Expansion blocks should not be installed when power
is applied to the base.
IMPORTANT
Carefully read the section “Word/Bit Definitions” on
page 18 to change produce and consume data sizes.
1. Remove the expansion covers from both the base and expansion modules.
2. Position the expansion block with the proper spacing. See the illustration below.
Module
Status
Network
Status
Profibus DP
Base Module Expansion Module
141 mm
5.55 in
01234567
01234567
Allen-Bradley
CompactBlock I/O
8 INPUTS / 8 OUTPUTS - DC POWER
25 mm
1 in
41 mm
1.6 in
1791P-8V8P
Expansion covers
104 mm
4.09 in
3. Mount expansion module using panel or DIN rail mounting, as described in the previous section.
41 mm
1.6 in
43116
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CompactBlock Distributed I/O on PROFIBUS DP Series D 9
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 cable.
01
67
01
Module
Status
Network
Status
Profibus DP
2345
Allen-Bradley
2345
CompactBlock I/O
1791P-8V8P
8 INPUTS / 8 OUTPUTS - DC POWER
67
43117
5. Replace the expansion covers on both modules.

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 1791P-4B4P module. The following figures show the wiring information for both sinking and sourcing wiring.
Input and Output wiring use up to 14AWG (2mm
inch insulation.
WARNING
Use supply wires suitable for 30°C above surrounding ambient.
2
) stranded (Cu) with 3/64
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10 CompactBlock Distributed I/O on PROFIBUS DP Series D
Output Wiring Diagram for 1791P-0B16P and 1791D-0B16PX Modules
V
DC
OUT 0 OUT 2
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
-
41669
Input Wiring Diagram for 1791P-16B0 and 1791D-16B0X Modules
V
DC
GND
IN 0 IN 2
IN 1 IN 3
IN 4
IN 5 IN 7
V
IN 8IN 6
IN 10
DC
IN 9
IN 12 IN 14
IN 11 IN 15IN 13GND
-
+
Not Used
41671
Wiring Diagram for the 1791P-8B8P Module
V
DC
GND
IN 0 IN 2
IN 1 IN 3
IN 4
IN 5 IN 7
OUT 0IN 6
OUT 2
V
DC
GND
OUT 1
OUT 4 OUT 6
OUT 3 OUT 7OUT 5
Not Used
-
+
Publication
+
Load
-
1791P-IN002B-EN-P - October 2003
41672
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