Rockwell Automation 1791 IOBX, IOVX Block I/O User Manual
The 1791 IOBX and 1791 IOVX are small, self-contained remote I/O devices that include a power supply, programmable controller interface, input/output connections, and signal conditioning circuitry. They are compatible with PLC-2, PLC-3, and PLC-5 family programmable controllers, and the SLC 500 modular controllers. These devices are designed for use in a variety of industrial applications.
Advertisement
Advertisement
Block I/O
Cat. No. 1791-IOBX and -IOVX
User Manual
Important User Information
Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment 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.
The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley 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 Allen-Bradley office) describes some important differences between solid-state equipment and electromechanical devices which 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 in part, without written permission of Allen–Bradley Company, Inc.
is prohibited.
Throughout this manual we make notes to alert you to possible injury to people or damage to equipment under specific circumstances.
ATTENTION: Tells readers where people may be hurt if procedures are not followed properly.
ATTENTION: Tells readers where machinery may be damaged or economic loss can occur if procedures are not followed properly.
Attention helps you:
Identify a hazard.
Avoid the hazard.
Recognize the consequences.
Important: We recommend you frequently backup your application programs on appropriate storage medium to avoid possible data loss.
Preface
Using This Manual
Purpose of Manual
This manual shows you how to use your Block I/O with an Allen-Bradley programmable controller. It helps you:
install
troubleshoot your module.
Audience
You must be able to program and operate an Allen-Bradley programmable controller (PLC) to make efficient use of Block I/O modules.
We assume that you know how to do this in this manual. If you do not, refer to the appropriate PLC programming and operations manual before you attempt to program this module.
Vocabulary
Manual Organization
In this manual, we refer to:
the block I/O module as the “block” or the “module”
the programmable controller as the “controller” or “processor.”
This manual is divided into 4 chapters. The following chart shows each chapter with its corresponding title and brief overview of the topics covered in that chapter.
Chapter
3
4
1
2
Title
Introducing Block I/O
Installing the Module
Configuring your block I/O
Troubleshooting
Appendix A
Specifications
Topics Covered
Description of the module, including general and hardware features
Module power requirements, location, and wiring information
How to set the configuration switches and address the block I/O.
How to use the indicators to troubleshoot your block I/O module.
How to replace the fuse.
Specifications for the block I/O.
P-1
Preface
Using This Manual
About Block I/O
Related Publications
Block I/O consists of small, self–contained remote I/O devices complete with power supply, programmable controller interface, input/output connections and signal conditioning circuitry.
This publication covers the 1791–IOBX and –IOVX block I/O modules.
The 1791–IOBX has 64 sinking inputs and 64 sourcing outputs; the
1791–IOVX has 64 sourcing inputs and 64 sinking outputs. In all other aspects, they are identical.
For a list of publications with information on Allen-Bradley programmable controller products, consult our publication index (SD499).
P-2
Table of Contents
Introducing Block I/O
Installing Block I/O
Chapter 1
Chapter Objectives
General Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How the Block I/O Fits in a PLC System . . . . . . . . . . . . . . . . . .
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-1
1-3
1-6
Chapter 2
Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pre–installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Block I/O
Connecting Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote I/O Link Wiring
Extended Node Capability
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compatibility of 1771 I/O Products with
Extended Node Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
2-1
2-1
2-3
2-13
2-14
2-15
2-15
2-15
Configuring Your Block I/O
Chapter 3
Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Configuration Switches . . . . . . . . . . . . . . . . . . . . . . .
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3-1
3-14
Troubleshooting Chapter 4
Chapter Objectives
Indicators
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing a Fuse
Summary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4-1
4-3
4-4
Specifications Appendix A
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
I
II
Table of Contents
(This page left intentionally blank.)
Introducing Block I/O
Chapter
1
Chapter Objectives
General Description
In this chapter you will learn what block I/O is, its features, and how it functions.
Block I/O consists of small, self-contained remote I/O devices complete with power supply, programmable controller interface, input/output connections and signal conditioning circuitry.
The 1791-IOBX 24V dc module has 64 sink input channels, and 64 source output channels.
The 1791-IOVX 24V dc module has 64 source input channels, and 64 sink output channels.
Complete specifications for these modules are contained in Appendix A.
The blocks are compatible with PLC-2
programmable controllers, and the SLC
, PLC-3
, and PLC-5
family
500 modular controllers. When used with PLC-2 family programmable controllers, a sub-scanner module is used to communicate with the blocks. When used with PLC-3 and
PLC-5 family programmable controllers, they can be connected directly to the controller or to a scanner module. When used with SLC 500 controllers, a 1747-SN remote I/O scanner is used to communicate with the blocks.
ATTENTION: When using PLC-3 programmable controllers, you must use a 1775-S5 or -SR5 scanner module. Do not use
1775-SR, -S4A or -S4B scanner modules.
Note: The 1791-IOBX and -IOVX block modules are not compatible with the 1747-DSN scanner module.
Connections are made to removable terminal blocks mounted on the sides of the block.
Physical features of the block I/O are shown in Figure 1.1.
1-1
Chapter 1
Introducing Block I/O
Rack Address
Switch
Power, Active,
Comm and Fuse
LED Indicators
Removable
Input Terminal
Blocks
Figure 1.1
Major Features of the 1791-IOBX and -IOVX Block I/O Modules
(-IOBX shown)
8 7 6 5 4 3 2 1
CONFIGURATION
SWITCHES
Configuration Switches
(on top of unit)
RACK
ADDR
POWER
ACTIVE
COMM
FUSE
DISPLAY
SELECT
INPUT OUTPUT
Input/Output
Status LED
Array
Display Select
Pushbuttons
1791-IOBX
128 POINT
24V DC DISTRIBUTED
I/O MODULE
64 24VDC SINK INPUTS
64 24VDC SOURCE OUTPUTS
Removable
Output Terminal
Blocks
CONFIGURATION SWITCHES
Terminal Block
Removal Screws
(same on all 4 terminal blocks)
GROUP No.
GROUP No.
RIO Wiring Block
+24V dc Power
Termination
Resistor
Switch
10914-I
Wiring Terminals - The remote I/O field wiring is made to 4 separate removable 37-pin terminal blocks mounted on the sides of the module.
Terminal assignments are shown in chapter 3.
A separate nonremovable terminal block is provided for connection of the remote I/O link and external 24V dc power supply.
1-2
Chapter 1
Introducing Block I/O
How the Block I/O Fits in a
PLC System
Switch Assemblies - Two DIP switches are provided for setting the I/O configuration and rack address.
The configuration switch lets you select baud rate, last state, processor restart lockout, last rack and I/O group.
The rack address switch lets you select the system rack address for the block.
A third switch is provided for selection of the termination resistor.
Status Indicators - Indicators are provided for power, active, communication and fuse blown indications. An LED array provides input/output status.
Status Indicators - Bi-color LED indicators provide power, active, communication and fuse blown indications. An LED array provides input/output status.
Indicator
Comm (green/wht)
Indication
On (green)
Off (wht)
On (green)
Off (red)
On (green)
Off (wht)
On (red)
Off (wht)
Customer voltage is present
No customer voltage (less than 2V)
CPU operating correctly
CPU not running
Communication correctly established
Communication not established
One of the 4 output fuses is open
All fuses are intact
The I/O status array is an 8 by 8 array of 64 LEDs capable of displaying the status of 32 inputs and 32 outputs at any one time. Pushbuttons are provided to toggle the display between the lower 32 bits and the upper
32 bits.
Block I/O is a complete I/O interface that includes the functionality of the
I/O rack, adapter, power supply, and I/O modules in a single unit. Simply connect sensors and actuators to the module and use the remote I/O cable to connect the block I/O to your programmable controller (Figure 1.6).
The 1791-IOBX block uses sinking inputs and sourcing outputs.
1-3
Chapter 1
Introducing Block I/O
In sinking inputs, the dc common is bussed on the block. and the current is sourced from the field device. The sourcing field device switches the hot side of the power supply bus causing current to flow through the sourcing device to the sinking input on the block. Refer to Figure 1.2.
Figure 1.2
Sinking Input Example
Bus
+V
Field
Device
Block I/O
Field
Device
Sinking
Input
DC Power
Supply
-V
Common
10826-I
Sourcing outputs have the power bussed in the block. When the output is on, current is supplied to the field control device, which sinks the current.
The field circuit and the equipment remain at ground potential until the output is turned on. Refer to Figure 1.3.
Note: The outputs must be externally fused to protect the device output against overcurrent or short circuit conditions.
Figure 1.3
Sourcing Output Example
Block I/O
+V
DC Power
Supply
-V
Fuse
Field
Device
Fuse
Field
Device
Common
Bus
Common
The 1791-IOVX block uses sourcing inputs and sinking outputs.
10827-I
1-4
Chapter 1
Introducing Block I/O
In sourcing input modules (Figure 1.4), the +V on dc circuits is bussed on the module supplying (sourcing) the current for each input circuit. The field device switches the circuit to the common (side of the power supply, sinking the circuit and causing current to flow from the module’s input.
Figure 1.4
Sourcing Input Example
Block I/O
+V
DC Power
Supply
-V
Field
Device
Input dc Common Bus
10917-I
In sinking outputs (Figure 1.5), the current flow is reversed. The dc common is bussed on the module and the current is sourced from the field device being actuated. When an output is turned on, the output switch in the module sinks the circuit, causing current to flow from the +V bus through the field device to the module.
Note: The outputs must be externally fused to protect the device output against overcurrent or short circuit conditions.
Figure 1.5
Sinking Output Example
Block I/O
+V
Fuse
Field
Device
Bus
Fuse
Field
Device
DC Power
Supply
Common
-V
Common
10918-I
1-5
Chapter 1
Introducing Block I/O
Block I/O functions exactly like any Allen-Bradley remote I/O product.
Input and output data is scanned asynchronously and transferred back and forth between the block and the controller input and output image table.
You connect the block I/O to your remote I/O link as you would any other device. The block looks like a 1/2 I/O rack to the processor, and uses 4 words of input image table memory and 4 words of output image table memory. The block is addressed directly on the remote I/O link.
Figure 1.6
Block I/O Connection in a PLC System
Blocks are daisy-chained to a programmable controller, or scanner.
Programmable Controller, or Scanner
Summary
Block I/O - each block is 1/2 I/O rack.
In this chapter you learned what block I/O is, its features and how it functions.
10915-I
1-6
Installing Block I/O
Chapter
2
Chapter Objectives
Pre-installation
Considerations
Installing the Block I/O
In this chapter you will learn how to mount the block, how to connect the remote I/O link, how to connect the input and output wiring to the block, and how to terminate the remote I/O link.
Before installation, you must determine:
the number of blocks desired
the total distance of the installation
transmission rate desired
Mounting dimensions for the block I/O module are shown in Figure 2.1.
Mount the blocks horizontally with a minimum of 2” between blocks. This air gap is necessary to maintain proper cooling air flow through the block.
2-1
Chapter 2
Installing Block I/O
0.67
(17.105)
Figure 2.1
Mounting Dimensions for the Block I/O Module (Cat. No. 1791-IOBX and -IOVX)
6.15
(156.21)
4.8
(122.0)
8 7 6 5 4 3 2 1
CONFIGURATION
SWITCHES
RACK
ADDR
POWER
ACTIVE
COMM
FUSE
DISPLAY
SELECT
INPUT OUTPUT
Dimensions:
6.15W x 13.0H x 1.72D
(156.21W x 334.0H x 43.7D)
12.7
(322.0)
1791-IOBX
128 POINT
24V DC
DISTRIBUTED
I/O MODULE
12.28
(312.0)
13.0
(334.0)
CONFIGURATION SWITCHES
Inches
(Millimeters)
GROUP No.
GROUP No.
10916-I
The operating temperature in the air gap between block I/O modules must not exceed 60 o
C (140 o
F). The dimensions of the air gap required are shown in Figure 2.2.
2-2
Connecting Wiring
Chapter 2
Installing Block I/O
Figure 2.2
Clearance Required for Block I/O Modules
2
(50.8)
2
(50.8)
2
(50.8)
Inches
(Millimeters)
2
(50.8)
10919-I
Connections to the block I/O module are made to the removable terminal blocks on each side of the module. Input connections are on the left side, and output connections are on the right side. The input terminal blocks are keyed differently than the output blocks to prevent incorrect insertion.
ATTENTION: Both input terminal blocks are keyed alike. If removed for wiring, or module replacement, make certain that the terminal blocks are placed in their proper position when reinstalling.
Wiring connections for the 1791-IOBX and -IOVX are shown in Tables
2.A through 2.H.
Catalog Number 1794-IOBX
Input Terminal Wiring
Groups 0 and 1 (TRM1) Table 2.A, page 2-4
Groups 2 and 3 (TRM2) Table 2.B, page 2-5
Output Terminal Wiring
Groups 0 and 1 (TRM3) Table 2.C, page 2-6
Groups 2 and 3 (TRM4) Table 2.D, page 2-7
Catalog Number 1794-IOVX
Input Terminal Wiring
Groups 0 and 1 (TRM1) Table 2.E, page 2-8
Groups 2 and 3 (TRM2) Table 2.F, page 2-9
Output Terminal Wiring
Groups 0 and 1 (TRM3) Table 2.G, page 2-10
Groups 2 and 3 (TRM4) Table 2.H, page 2-11
Remote I/O link wiring connections are shown in Figure 2.3.
2-3
Chapter 2
Installing Block I/O
9
10
7
8
11
12
13
14
15
16
17
18
3
4
5
6
1
2
Terminal
N b
Input Assignment
Group 0
PLC SLC
Common A Common A
Input 00 Input 00
Input 01
Input 02
Input 03
Input 04
Input 01
Input 02
Input 03
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
Input 16
Input 17
N.C.
Input 05
Input 06
Input 07
Input 08
Input 09
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
N.C.
25
26
27
28
29
30
31
32
33
34
35
36
37
19
20
21
22
23
24
Terminal
N b
Table 2.A
1791-IOBX Input Terminal Wiring for Groups 0 and 1 (TRM1) for PLC
Family Controllers and SLC Processors
+V
PLC
Input Assignment
Group 1
PLC SLC
Common B Common B
Input 00 Input 00
Input 01
Input 02
Input 03
Input 04
Input 01
Input 02
Input 03
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
Input 16
Input 17
N.C.
N.C.
Input 05
Input 06
Input 07
Input 08
Input 09
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
N.C.
N.C.
INPUT
NC
06
07
10
11
12
13
14
15
16
17
COM
00
01
02
03
04
05
COM
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
1
0
NC
NC
Common
36 37
SLC
INPUT
NC
06
07
08
09
10
11
12
13
14
15
COM
00
01
02
03
04
05
COM
08
09
10
11
12
13
14
15
00
01
02
03
04
05
06
07
0
1
NC
NC
12490-I
2-4
Chapter 2
Installing Block I/O
Table 2.B
1791-IOBX Input Terminal Wiring for Groups 2 and 3 (TRM2) for PLC
Family Programmable Controllers and SLC Processors
+V
14
15
16
17
18
10
11
8
9
12
13
3
4
1
2
5
6
7
Terminal
N b
Input Assignment
Group 2
PLC SLC
Common C Common C
Input 00 Input 00
Input 01
Input 02
Input 01
Input 02
Input 03
Input 04
Input 05
Input 03
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
Input 16
Input 17
N.C.
Input 06
Input 07
Input 08
Input 09
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
N.C.
32
33
34
35
26
27
28
29
30
31
36
37
19
20
21
22
23
24
25
Terminal
N b
Input Assignment
Group 3
PLC SLC
Common D Common D
Input 00 Input 00
Input 01
Input 02
Input 01
Input 02
Input 03
Input 04
Input 05
Input 03
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
Input 16
Input 17
N.C.
N.C.
Input 06
Input 07
Input 08
Input 09
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
N.C.
N.C.
PLC
COM
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
NC
COM
00
12
11
14
13
15
16
17
01
02
04
03
06
05
10
07
NC
NC
SLC
2
GROUP No.
COM
08
09
10
11
12
13
14
15
00
01
02
03
04
05
06
07
NC
COM
00
10
09
12
11
13
14
15
01
02
04
03
06
05
08
07
3
NC
NC
2
GROUP No.
3
Common
36 37
12490-I
2-5
Chapter 2
Installing Block I/O
9
10
7
8
11
12
13
14
15
16
17
18
19
3
4
5
6
1
2
Terminal
N b
Output Assignment
Group 1
PLC SLC
N.C.
N.C.
Common B Common B
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC B VDC B
Table 2.C
1791-IOBX Output Terminal Wiring for Groups 0 and 1 (TRM3) for PLC
Family Programmable Controllers
SLC PLC
26
27
28
29
30
31
32
33
34
35
36
37
20
21
22
23
24
25
Terminal
N b
Output Assignment
Group 0
PLC SLC
Common A Common A
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC A VDC A
0
1
OUTPUT
11
10
13
12
15
14
COM
+VDC
L
00
01
03
02
05
04
07
06
09
08
NC
07
06
09
08
11
10
13
12
15
14
+VDC
L
00
01
03
02
05
04
COM
OUTPUT
0
1
13
12
15
14
17
16
COM
+VDC
L
00
01
03
02
05
04
07
06
11
10
NC
07
06
11
10
13
12
15
14
17
16
+VDC
L
00
01
03
02
05
04
COM
37 36 +VDC
Field
Device
Field
Device
Field
Device
Field
Device
Common
12491-I
2-6
Chapter 2
Installing Block I/O
Table 2.D
1791-IOBX Output Terminal Wiring for Groups 2 and 3 (TRM4) for PLC
Family Programmable Controllers
3
4
5
6
1
2
9
10
7
8
11
12
13
14
15
16
17
18
19
Terminal
N b
Output Assignment
Group 3
PLC SLC
N.C.
N.C.
Common D Common D
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC D VDC D
32
33
34
35
26
27
28
29
30
31
36
37
20
21
22
23
24
25
Terminal
N b
Output Assignment
Group 2
PLC SLC
Common C Common C
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC C VDC C
3
2
2
SLC
09
10
11
12
13
14
15
COM
+VDC
L
00
01
03
02
05
04
07
06
08
NC
09
10
11
12
13
14
15
+VDC
L
00
01
03
02
05
04
06
07
08
COM
3
2
2
PLC
11
12
13
14
15
16
17
COM
+VDC
L
01
00
03
02
05
04
07
06
10
NC
11
12
13
14
15
16
17
+VDC
L
00
01
03
02
05
04
06
07
10
COM
37 36
+VDC
Field
Device
Field
Device
Field
Device
Field
Device
Common
12491-I
2-7
Chapter 2
Installing Block I/O
N b
10
11
12
13
14
15
16
17
18
6
7
4
5
8
9
1
2
3
Input Assignment
Group 0
PLC SLC
VDC A VDC A
Input 00 Input 00
Input 01 Input 01
Input 02 Input 02
Input 03 Input 03
Input 04 Input 04
Input 05 Input 05
Input 06 Input 06
Input 07 Input 07
Input 10 Input 08
Input 11 Input 09
Input 12 Input 10
Input 13 Input 11
Input 14 Input 12
Input 15 Input 13
Input 16 Input 14
Input 17 Input 15
N.C.
N.C.
N b
28
29
30
31
32
33
34
35
36
37
22
23
24
25
26
27
19
20
21
Input Assignment
Group 1
PLC SLC
VDC B VDC B
Input 00 Input 00
Input 01 Input 01
Input 02 Input 02
Input 03 Input 03
Input 04 Input 04
Input 05 Input 05
Input 06 Input 06
Input 07 Input 07
Input 10 Input 08
Input 11 Input 09
Input 12 Input 10
Input 13 Input 11
Input 14 Input 12
Input 15 Input 13
Input 16 Input 14
Input 17 Input 15
N.C.
N.C.
N.C.
N.C.
Table 2.E
1791-IOVX Input Terminal Wiring for Groups 0 and 1 (TRM1) for PLC
Family Programmable Controllers
+VDC
PLC
INPUT
NC
+VDC
00
01
02
03
04
05
06
07
10
11
12
13
14
16
15
17
+VDC
00
01
02
03
04
05
06
10
07
12
11
14
13
15
16
17
NC
NC
0
1
SLC
INPUT
NC
+VDC
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
+VDC
00
01
02
03
04
05
06
08
07
10
09
12
11
13
14
15
NC
NC
0
1
36 37
12493-I
2-8
Chapter 2
Installing Block I/O
Table 2.F
1791-IOVX Input Terminal Wiring for Groups 2 and 3 (TRM2) for PLC
Family Programmable Controllers
N b
10
11
12
13
14
15
16
17
18
6
7
4
5
8
9
1
2
3
Input Assignment
Group 2
PLC SLC
VDC C VDC C
Input 00 Input 00
Input 01 Input 01
Input 02 Input 02
Input 03 Input 03
Input 04 Input 04
Input 05 Input 05
Input 06 Input 06
Input 07 Input 07
Input 10 Input 08
Input 11 Input 09
Input 12 Input 10
Input 13 Input 11
Input 14 Input 12
Input 15 Input 13
Input 16 Input 14
Input 17 Input 15
N.C.
N.C.
N b
28
29
30
31
32
33
34
35
36
37
22
23
24
25
26
27
19
20
21
Input Assignment
Group 3
PLC SLC
VDC D VDC D
Input 00 Input 00
Input 01 Input 01
Input 02 Input 02
Input 03 Input 03
Input 04 Input 04
Input 05 Input 05
Input 06 Input 06
Input 07 Input 07
Input 10 Input 08
Input 11 Input 09
Input 12 Input 10
Input 13 Input 11
Input 14 Input 12
Input 15 Input 13
Input 16 Input 14
Input 17 Input 15
N.C.
N.C.
N.C.
N.C.
+VDC
PLC
NC
+VDC
06
05
07
10
11
12
00
01
02
03
04
14
13
15
16
17
04
05
06
10
07
11
+VDC
00
01
02
03
12
13
14
15
16
17
NC
NC
2
3
SLC
NC
+VDC
06
05
07
08
09
10
00
01
02
03
04
12
11
13
14
15
04
05
06
08
07
09
+VDC
00
01
02
03
10
11
12
13
14
15
NC
NC
3
2
36 37
12493-I
2-9
Chapter 2
Installing Block I/O
Table 2.G
1791-IOVX Output Terminal Wiring for Groups 0 and 1 (TRM3) for PLC
Family Programmable Controllers
11
12
13
14
15
16
17
18
19
7
8
5
6
9
10
1
2
3
4
Terminal
N b
Output Assignment
Group 1
PLC SLC
N.C.
N.C.
Common B Common B
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC B VDC B
30
31
32
33
34
35
36
37
24
25
26
27
28
29
20
21
22
23
Terminal
N b
Output Assignment
Group 0
PLC SLC
Common A Common A
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC A VDC A
SLC
1
11
12
13
14
15
-COM
07
06
09
08
10
+VDC
L
00
01
02
03
04
05
NC
0
OUTPUT
07
08
09
10
11
12
13
14
15
-COM
+VDC
L
00
01
02
03
04
05
06
PLC
1
13
14
15
16
17
-COM
07
06
11
10
12
+VDC
L
00
01
02
03
04
05
NC
0
OUTPUT
07
10
11
12
13
14
15
16
17
-COM
+VDC
L
00
01
02
03
04
05
06
37 36
Common
Field
Device
Field
Device
Field
Device
Field
Device
+VDC
12494-I
2-10
Chapter 2
Installing Block I/O
Table 2.H
1791-IOVX Output Terminal Wiring for Groups 2 and 3 (TRM4) for PLC
Family Programmable Controllers
11
12
13
14
15
16
17
18
19
7
8
5
6
9
10
1
2
3
4
Terminal
N b
Output Assignment
Group 3
PLC SLC
N.C.
N.C.
Common D Common D
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC D VDC D
30
31
32
33
34
35
36
37
24
25
26
27
28
29
20
21
22
23
Terminal
N b
Output Assignment
Group 2
PLC SLC
Common C Common C
Output 17 Output 15
Output 16 Output 14
Output 15 Output 13
Output 14 Output 12
Output 13 Output 11
Output 12 Output 10
Output 11 Output 09
Output 10 Output 08
Output 07 Output 07
Output 06 Output 06
Output 05 Output 05
Output 04 Output 04
Output 03 Output 03
Output 02 Output 02
Output 01 Output 01
Output 00 Output 00
VDC C VDC C
2
3
2
PLC
07
06
11
10
13
12
15
14
16
17
-COM
+VDC
L
00
01
03
02
05
04
NC
04
05
06
07
10
11
12
+VDC
L
00
01
03
02
13
14
15
16
17
-COM
2
3
2
SLC
07
06
09
08
11
10
13
12
14
15
-COM
+VDC
L
00
01
03
02
05
04
NC
07
08
09
10
11
13
12
14
15
-COM
+VDC
L
00
01
02
03
04
05
06
37 36
Field
Device
Field
Device
Field
Device
Field
Device
Field
Device
+VDC
Common
12494-I
Table 2.I
Wiring Block Designations
Connector
Input Terminals
Output Terminals
Designation
1 (BLU)
2 (CLR)
Shield
Chassis GND
24VDC RET
24VDC
1 thru 37
1 thru 37
Description
Blue wire - RIO
Clear wire - RIO
Shield - RIO
Chassis Ground
+24V ground
+24V dc
See Tables
See Tables
2-11
Chapter 2
Installing Block I/O
Power Supply Requirements
An external 24V dc (+10/-25%) power supply is required to power the block. Total current required to power the block is equal to 300mA.
In addition, the external power supply should have current limiting capabilities. The voltage range must not exceed 18.0-26.4V dc.
Wiring Requirements
Wiring cable requirements are shown in Table 2.J.
Use
Remote I/O Link
Table 2.J
Acceptable Wiring Cables for Block I/O Connection
Input and Output wiring
Cable Type With
Belden 9463
PLC-2, PLC-3, PLC-5 family programmable controllers and SLC controllers
Up to 14AWG (2mm
2)
Stranded with 3/64 inch (1.2mm) insulation
All
Figure 2.3
Remote I/O Link Wiring
GROUP No.
GROUP No.
2
(CLR)
Shield
1
(BLU)
Chassis
GND
24VDC
RET
24VDC
TERMINATION
RESISTOR
- 150 OHM
-OFF
- 82 OHM
Connection
1
(BLU)
2
(CLR)
Clear wire X
Shield
Blue wire X
Shield wire X
10928-I
2-12
Chapter 2
Installing Block I/O
Remote I/O Link Wiring
Blocks must be wired in series as shown in Figure 2.4. Do not attempt to wire any block in parallel.
The number of blocks used depends not only on the user requirements but also on the system used.
Figure 2.4
Series Connection for Block I/O Using PLC-2, PLC-3 or PLC-5 Family
Programmable Controllers
To Programmable Controller or I/O Scanner Module
1 I/O Rack
1 I/O Rack
Install terminating resistor on last block.
1 I/O Rack
1 I/O Rack
10929-I
2-13
Chapter 2
Installing Block I/O
Termination Resistor
A termination resistor must be used on the last block in the series. A 150 ohm and 82 ohm termination resistors are built into the unit. To select the termination resistor, position the switch to the desired position as shown in
Figure 2.5.
Figure 2.5
Installing the Termination Resistor
2
(CLR)
Shield
1
(BLU)
Chassis
GND
24VDC
RET
24VDC
TERMINATION
RESISTOR
- 150 OHM
-OFF
- 82 OHM
Position switch to connect termination resistor across 1 and 2 as follows:
150 ohm - position switch at top;
82 ohm - position switch at bottom;
OFF - no resistor - position switch in middle.
10930-I
Extended Node Capability
If this is the last remote I/O adapter on the RIO link in a PLC system, you must use a terminating resistor to terminate both ends of the remote I/O link (scanner end and last block end). The size of the terminator is determined by the system configuration.
Older configurations can use a 150 ohm resistor at both ends. With newer devices that can support it, you can use an 82 ohm termination resistor at both ends. The 82 ohm terminators provide “extended node” capability which allows you to have up to 32 physical devices on the RIO link. (The number of logical racks capable of being addressed by the scanner is not affected.)
ATTENTION: Devices that are operating at 230.4K baud must have 82 ohm terminators in place for proper operation.
2-14
Chapter 2
Installing Block I/O
Compatibility of 1771 I/O
Products with Extended
Node Operation
Fusing
Summary
Certain products are not compatible with extended node capabilities obtained with the use of 82 ohm terminators. The following table lists those products that are not compatible.
Device Series
Scanners -1771-SN
Adapters -
1772-SD
1772-SD2
1775-SR
1
1775-S4A
1
1775-S4B
1
1771-AS
1771-ASB
1771-DCM
Miscellaneous - 1771-AF All
1771-AF1 All
1
When using PLC-3 programmable controllers, you must use a
1775-S5 or -SR5 scanner module. Do not use 1775-SR, -S4A or -S4B scanner modules.
All
All
All
All
All
All
All
Series A
All
1791 high-density block I/O modules (64 and 128 input/output) have internal fusing. Each group of 16 output points is protected by a 5.0A fuse.
These fuses protect the user output devices. They do not protect each individual output from overload. It is recommended that individual outputs be fused externally to protect the individual output circuit.
Catalog Number Voltage
1791-IOBX
24V dc
1791-IOVX
24V dc
Maximum Output Rating at:
30 o
C 60 o
C
Maximum Surge Current
300mA per point
1 0A 25
1 pulse per second maximum
Consult the factory for fuse recommendations.
In this chapter you learned how to physically mount your block I/O, make power wiring connections, how to make the input/output wiring connections to the block, and how to terminate the remote I/O link.
2-15
Chapter 2
Installing Block I/O
(This page left intentionally blank.)
2-16
Configuring Your Block I/O
Chapter
3
Chapter Objectives
Setting the Configuration
Switches
In this chapter you will learn how to configure your block I/O when used with PLC family programmable controllers. This includes the following:
setting the configuration switches
addressing the block I/O
To learn how to configure your block I/O when used with SLC 500 processors, refer to the publication for the 1747-SN Remote I/O Scanner
Module.
Each block I/O module has multiple-position switches for setting:
transmission (baud) rate - used to set the communication rate chosen for the remote I/O link
last state - when last state is enabled, a processor reset will keep the outputs in their present (last) state; when last state is disabled, the outputs will reset
processor restart lockout (PRL) - when PRL is enabled (switch 4 on), the programmable controller cannot automatically start up the module’s communications if the power has been cycled to either the module or the programmable controller. Press Input and Output pushbuttons simultaneously to reset PRL.
last rack - used to identify if the module contains the highest numbered
I/O group for the associated rack number
I/O group address - used to identify which module group (0-3 or 4-7) the module should assign to its inputs/outputs
rack address - used to select the rack address of the module
RIO termination resistor - used to connect an internal resistor
(82 ohm, 150 ohm, or no resistor) across LINE 1 and 2 on the remote
I/O terminals
These switches are all accessible on the front or top of the module, as shown in Figure 3.1.
3-1
Chapter 3
Configuring Your Block I/O
Configuration Switch
Rack Address Switch
Termination Resistor Switch
Figure 3.1
Switch Setting Locations (1791-IOBX shown)
14
13
16
15
17
NC
NC
00
01
02
03
04
05
06
07
10
11
12
06
05
10
07
12
11
14
13
COM
00
01
02
03
04
16
15
17
NC
COM
RACK
ADDR
POWER
ACTIVE
COMM
FUSE
8 7 6 5 4 3 2 1
CONFIGURATION
SWITCHES
DISPLAY
SELECT
INPUT
OUTPUT
1791-IOBX
128 POINT
24V DC DISTRIBUTED
I/O MODULE
12
11
14
13
16
15
17
NC
COM
COM
00
01
02
03
04
05
06
07
10
00
01
02
03
04
05
06
07
10
11
12
13
14
16
15
17
NC
NC
GROUP No.
64 24VDC SOURCE OUTPUTS
BAUD
RATE
64 24VDC SINK INPUTS
CONFIGURATION SWITCHES
57.6K BPS
115.2KBPS
230.4KBPS
UNUSED
PRL
4
NO OFF
YES ON
1 2
OFF OFF
ON OFF
OFF ON
ON ON
LAST
RACK
5
NO OFF
YES ON
LAST
STATE
LATCH
RESET
NOT
USED
3
OFF
ON
7 8
I/O
GROUP
0 to 3
4 to 7
6
OFF
ON
GROUP No.
11
12
13
14
Termination Resistor
150 Ohm
Off
82 Ohm
15
16
17
COM
NC
02
03
04
05
06
07
10
+VDC
00
01
02
03
04
05
06
07
10
11
12
13
14
15
17
16
COM
+VDC
00
01
+VDC
L
01
00
02
03
04
05
06
07
10
11
12
13
14
15
16
17
COM
+VDC
L
00
01
02
13
14
15
16
17
COM
NC
03
04
05
06
07
10
11
12
3-2
10931-I
Chapter 3
Configuring Your Block I/O
Rack Address Switch
(Refer to Table 3.A)
ON
Figure 3.2
Configuration Switch Settings (PLC designations shown)
COM
00
01
02
03
04
05
06
07
10
11
12
14
13
15
RACK
ADDR
8 7 6 5 4 3 2 1
CONFIGURATION
SWITCHES
Configuration Switch
(Top View of Switch)
8 7 6 5 4 3 2 1
+VDC
07
10
11
12
13
14
15
L
01
00
02
03
04
05
06
Not Used set to off
7 8
I/O
Group
0 to 3
4 to 7
6
OFF
ON
L
AST
R
ACK
5
NO OFF
YES ON
Last Rack Switch 5
PLC-2
OFF - When module does not contain the highest numbered I/O group for the associated rack number.
ON - When module does contain the highest numbered I/O group for the associated rack number.
PLC-3
This switch must always be set to “OFF.”
PLC-5
This switch not used.
B
AUD
R
ATE
57.6kbps
115.2kbps
230.4kbps
Unused
1 2
OFF
ON
OFF
ON
OFF
OFF
ON
ON
L
AST
S
TATE
Latch
Reset
3
OFF
ON
Last State Switch 3
CAUTION: Set switch 3 to the ON position to deenergize outputs wired to this module when a fault is detected. If switch 3 is set to the
OFF position, outputs connected to this module remain in their last state when a fault occurs and machine motion may continue after fault detection.
PRL
4
Disabled OFF
Enabled ON
Processor Restart Lockout (PRL) Switch 4
-
When PRL is enabled (on), the programmable controller cannot automatically start up the module’s communications if the power has been cycled to either the module or the programmable controller
10932-I
3-3
Chapter 3
Configuring Your Block I/O
1747-SN 1771-SN
Number
Rack 0
Rack 1
Rack 2
Rack 3
Number
Rack 1
Rack 2
Rack 3
Rack 4
Rack 5
Rack 6
Rack 7
Table 3.A
Rack Address Switch Settings
PLC-2
Number
Rack 1
Rack 2
Rack 3
Rack 4
Rack 5
Rack 6
Rack 7
PLC-5
Number
Not Valid
Rack 1
Rack 2
Rack 3
Rack 14
Rack 15
Rack 16
Rack 17
Rack 20
Rack 21
Rack 22
Rack 23
Rack 24
Rack 25
Rack 26
Rack 27
Rack 4
Rack 5
Rack 6
Rack 7
Rack 10
Rack 11
Rack 12
Rack 13
PLC-5/250
Number
Rack 0
Rack 1
Rack 2
Rack 3
Rack 14
Rack 15
Rack 16
Rack 17
Rack 20
Rack 21
Rack 22
Rack 23
Rack 24
Rack 25
Rack 26
Rack 27
Rack 30
Rack 4
Rack 5
Rack 6
Rack 7
Rack 10
Rack 11
Rack 12
Rack 13
Rack 31
Rack 32
Rack 33
Rack 34
Rack 35
Rack 36
Rack 37
PLC-3
Number
Rack 0
Rack 1
Rack 2
Rack 3
Rack 40
Rack 41
Rack 42
Rack 43
Rack 44
Rack 45
Rack 46
Rack 31
Rack 32
Rack 33
Rack 34
Rack 35
Rack 36
Rack 37
Rack 47
Rack 50
Rack 51
Rack 52
Rack 53
Rack 54
Rack 55
Rack 56
Rack 57
Rack 60
Rack 61
Rack 62
Rack 14
Rack 15
Rack 16
Rack 17
Rack 20
Rack 21
Rack 22
Rack 23
Rack 24
Rack 25
Rack 26
Rack 27
Rack 30
Rack 4
Rack 5
Rack 6
Rack 7
Rack 10
Rack 11
Rack 12
Rack 13
Rack Address Switch Position
5
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
1
0
0
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
0
0
1
1
1
1
0
1
0
0
0
0
0
0
1
1
1
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
3
0
0
0
0
1
1
1
0
1
0
0
1
1
1
1
0
1
1
0
0
0
0
0
1
1
0
1
1
0
0
1
1
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
2
1
1
0
0
0
0
1
1
0
0
1
0
1
1
1
0
0
1
0
1
0
1
1
0
1
0
0
0
1
1
1
1
0
1
1
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
6
1
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3-4
Chapter 3
Configuring Your Block I/O
Rack 63
Rack 64
Rack 65
Rack 66
Rack 67
Rack 70
Rack 71
Rack 72
Rack 73
Rack 74
Rack 75
Rack 76
Not Valid
6
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1
1
1
0
1
0
0
0
0
1
1
1
Rack Address Switch Position
5
1
1
1
1
1
1
1
1
1
1
1
1
1
3
0
0
0
1
1
0
0
1
1
1
1
1
1
2
0
1
1
0
1
0
1
0
0
1
0
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
Rack address 77 is an illegal configuration.
PLC-5/11 processors can scan rack 03.
PLC-5/15 and PLC-5/20 processors can scan racks 01-03.
PLC-5/25 and PLC-5/30 processors can scan racks 01-07.
PLC-5/40 and PLC-5/40L processors can scan racks 01-17.
PLC-5/60 and PLC-5/60L processors can scan racks 01-27.
PLC-5/250 processors can scan racks 00-37.
PLC-3 processors can scan racks 00-76.
Each block uses 4 words of output image table memory and 4 words of input image table memory. Each block occupies 1/2 rack of data table, with
2 blocks comprising 1 logical rack. Image table usage for one assigned rack number is shown in Figure 3.3. An example of image table usage is shown in Figure 3.4.
1
1791-IOBX
Rack 1
2 1791-IOBX or 1791-IOVX per rack
1st 1/2 rack = module group 0-3
2nd 1/2 rack = module group 4-7
2
Figure 3.3
I/O Image Table for One Assigned Rack Number
17
Input Image
10 7
Block 1
Inputs
Block 2
Inputs
6
7
4
5
2
3
0
1
1791-IOVX
Output Image
10 7
Block 1
Outputs
Block 2
Outputs
2
3
4
0
1
5
6
7
17
0
0
10933-I
3-5
Chapter 3
Configuring Your Block I/O
Starting
I/O Group
0
(Configuration
Switch 6 = OFF)
110
111
112
113
010
011
012
013
Figure 3.4
Input Table Usage Example for One Starting I/O Group with 1791-IOBX and -IOVX
Example
1 1 1 00
Type of I/O
1 = Input
0 = Output
I/O Rack Number
I/O Bit
I/O Group Number
17 16 15 14 13 12
17 16 15 14 13 12
11 10 7 6 5 4 3 2 1 0
11 10 7 6 5 4 3 2 1 0
17 16 15 14 13 12
17 16 15 14 13 12
11 10 7 6 5 4 3 2 1 0
11 10 7 6 5 4 3 2 1 0
Input Image
17 16 15 14 13 12
17 16 15 14 13 12
11 10 7 6 5 4 3 2 1 0
11 10 7 6 5 4 3 2 1 0
17 16 15 14 13 12
17 16 15 14 13 12
11 10 7 6 5 4 3 2 1 0
11 10 7 6 5 4 3 2 1 0
Output Image
Starting
I/O Group
4
(Configuration
Switch 6 = ON)
014
015
016
017
114
115
116
117
17
17
16
16
15
15
14
14
13 12
17 16 15 14 13 12
13 12
17 16 15 14 13 12
11 10 7 6 5 4 3 2 1 0
11 10 7 6 5 4 3 2 1 0
11 10 7 6 5 4 3 2 1 0
11 10 7 6 5 4 3 2 1 0
Input Image
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Output Image
10934-I
3-6
Chapter 3
Configuring Your Block I/O
Terminal
Number
12
13
14
15
10
11
8
9
16
17
18
6
7
4
5
1
2
3
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 0
Common A
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
Program
Address
1XY10
1XY11
1XY12
1XY13
1XY14
1XY15
1XY16
1XY17
1XY00
1XY01
1XY02
1XY03
1XY04
1XY05
1XY06
1XY07
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Table 3.B
1791-IOBX Input Terminal Addressing for Groups 0 and 1 (TRM1)
Terminal
Number
30
31
32
33
26
27
28
29
34
35
36
22
23
24
25
19
20
21
37
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 1
Common B
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
N.C.
Program
Address
1X(Y+1)10
1X(Y+1)11
1X(Y+1)12
1X(Y+1)13
1X(Y+1)14
1X(Y+1)15
1X(Y+1)16
1X(Y+1)17
1X(Y+1)00
1X(Y+1)01
1X(Y+1)02
1X(Y+1)03
1X(Y+1)04
1X(Y+1)05
1X(Y+1)06
1X(Y+1)07
COM
NC
COM
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
00
01
02
03
04
05
06
10
07
12
11
14
13
16
15
17
INPUT
0
1
NC
NC
36 37
10935-I
3-7
Chapter 3
Configuring Your Block I/O
Terminal
Number
12
13
14
15
10
11
8
9
16
17
18
6
7
4
5
1
2
3
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 2
Common C
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
Program
Address
1X(Y+2)10
1X(Y+2)11
1X(Y+2)12
1X(Y+2)13
1X(Y+2)14
1X(Y+2)15
1X(Y+2)16
1X(Y+2)17
1X(Y+2)00
1X(Y+2)01
1X(Y+2)02
1X(Y+2)03
1X(Y+2)04
1X(Y+2)05
1X(Y+2)06
1X(Y+2)07
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Table 3.C
1791-IOBX Input Terminal Addressing for Groups 2 and 3 (TRM2)
Terminal
Number
30
31
32
33
26
27
28
29
34
35
36
22
23
24
25
19
20
21
37
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 3
Common D
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
N.C.
Program
Address
1X(Y+3)10
1X(Y+3)11
1X(Y+3)12
1X(Y+3)13
1X(Y+3)14
1X(Y+3)15
1X(Y+3)16
1X(Y+3)17
1X(Y+3)00
1X(Y+3)01
1X(Y+3)02
1X(Y+3)03
1X(Y+3)04
1X(Y+3)05
1X(Y+3)06
1X(Y+3)07
10
11
12
13
14
15
16
17
NC
COM
00
01
02
03
04
05
06
07
12
11
14
13
15
16
17
COM
00
01
02
03
04
05
06
10
07
NC
NC
2
GROUP No.
3
2
36 37
10936-I
3-8
Chapter 3
Configuring Your Block I/O
Terminal
Number
Program
Address
12
13
14
15
10
11
8
9
16
17
18
19
6
7
4
5
1
2
3
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Output
Assignment
Group 1
N.C.
Common B
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC B
0X(Y+1)17
0X(Y+1)16
0X(Y+1)15
0X(Y+1)14
0X(Y+1)13
0X(Y+1)12
0X(Y+1)11
0X(Y+1)10
0X(Y+1)07
0X(Y+1)06
0X(Y+1)05
0X(Y+1)04
0X(Y+1)03
0X(Y+1)02
0X(Y+1)01
0X(Y+1)00
Table 3.D
1791-IOBX Output Terminal Addressing for Groups 0 and 1 (TRM3)
37
Terminal
Number
31
32
33
34
27
28
29
30
35
36
37
23
24
25
26
20
21
22
Output
Assignment
Group 0
Common A
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC A
Program
Address
0XY07
0XY06
0XY05
0XY04
0XY03
0XY02
0XY01
0XY00
0XY17
0XY16
0XY15
0XY14
0XY13
0XY12
0XY11
0XY10
1
07
06
11
10
13
12
15
14
+VDC
L
00
01
03
02
05
04
17
16
COM
NC
OUTPUT
0
07
06
11
10
13
12
15
14
17
16
+VDC
L
00
01
03
02
05
04
COM
36
10937-I
3-9
Chapter 3
Configuring Your Block I/O
Terminal
Number
Program
Address
12
13
14
15
10
11
8
9
16
17
18
19
6
7
4
5
1
2
3
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Output
Assignment
Group 3
N.C.
Common D
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC D
0X(Y+3)17
0X(Y+3)16
0X(Y+3)15
0X(Y+3)14
0X(Y+3)13
0X(Y+3)12
0X(Y+3)11
0X(Y+3)10
0X(Y+3)07
0X(Y+3)06
0X(Y+3)05
0X(Y+3)04
0X(Y+3)03
0X(Y+3)02
0X(Y+3)01
0X(Y+3)00
Table 3.E
1791-IOBX Output Terminal Addressing for Groups 2 and 3 (TRM4)
37
Terminal
Number
31
32
33
34
27
28
29
30
35
36
37
23
24
25
26
20
21
22
Output
Assignment
Group 2
Common C
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC C
Program
Address
0X(Y+2)07
0X(Y+2)06
0X(Y+2)05
0X(Y+2)04
0X(Y+2)03
0X(Y+2)02
0X(Y+2)01
0X(Y+2)00
0X(Y+2)17
0X(Y+2)16
0X(Y+2)15
0X(Y+2)14
0X(Y+2)13
0X(Y+2)12
0X(Y+2)11
0X(Y+2)10
2
GROUP No.
3
2
+VDC
11
10
13
12
15
14
17
16
COM
L
00
01
03
02
05
04
07
06
NC
00
L
01
03
02
05
04
07
06
11
10
13
12
15
14
17
16
COM
+VDC
36
10938-I
3-10
Chapter 3
Configuring Your Block I/O
Terminal
Number
12
13
14
15
10
11
8
9
16
17
18
6
7
4
5
1
2
3
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 0
VDC A
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
Program
Address
1XY10
1XY11
1XY12
1XY13
1XY14
1XY15
1XY16
1XY17
1XY00
1XY01
1XY02
1XY03
1XY04
1XY05
1XY06
1XY07
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Table 3.F
1791-IOVX Input Terminal Addressing for Groups 0 and 1 (TRM1)
Terminal
Number
30
31
32
33
26
27
28
29
34
35
36
22
23
24
25
19
20
21
37
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 1
VDC B
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
N.C.
Program
Address
1X(Y+1)10
1X(Y+1)11
1X(Y+1)12
1X(Y+1)13
1X(Y+1)14
1X(Y+1)15
1X(Y+1)16
1X(Y+1)17
1X(Y+1)00
1X(Y+1)01
1X(Y+1)02
1X(Y+1)03
1X(Y+1)04
1X(Y+1)05
1X(Y+1)06
1X(Y+1)07
INPUT
+VDC
00
01
02
03
04
05
06
10
07
12
11
14
13
15
16
17
NC
+VDC
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
0
1
NC
NC
36 37
10939-I
3-11
Chapter 3
Configuring Your Block I/O
Terminal
Number
12
13
14
15
10
11
8
9
16
17
18
6
7
4
5
1
2
3
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 2
VDC C
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
Program
Address
1X(Y+2)10
1X(Y+2)11
1X(Y+2)12
1X(Y+2)13
1X(Y+2)14
1X(Y+2)15
1X(Y+2)16
1X(Y+2)17
1X(Y+2)00
1X(Y+2)01
1X(Y+2)02
1X(Y+2)03
1X(Y+2)04
1X(Y+2)05
1X(Y+2)06
1X(Y+2)07
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Table 3.G
1791-IOVX Input Terminal Addressing for Groups 2 and 3 (TRM2)
Terminal
Number
30
31
32
33
26
27
28
29
34
35
36
22
23
24
25
19
20
21
37
Input 04
Input 05
Input 06
Input 07
Input 10
Input 11
Input 12
Input 13
Input
Assignment
Group 3
VDC D
Input 00
Input 01
Input 02
Input 03
Input 14
Input 15
Input 16
Input 17
N.C.
N.C.
Program
Address
1X(Y+3)10
1X(Y+3)11
1X(Y+3)12
1X(Y+3)13
1X(Y+3)14
1X(Y+3)15
1X(Y+3)16
1X(Y+3)17
1X(Y+3)00
1X(Y+3)01
1X(Y+3)02
1X(Y+3)03
1X(Y+3)04
1X(Y+3)05
1X(Y+3)06
1X(Y+3)07
NC
+VDC
10
07
12
11
14
13
16
15
17
00
01
02
04
03
06
05
+VDC
00
01
02
03
04
05
06
07
10
12
11
14
13
15
16
17
2
GROUP No.
3
NC
NC
36 37
10940-I
3-12
Chapter 3
Configuring Your Block I/O
Terminal
Number
Program
Address
12
13
14
15
10
11
8
9
16
17
18
19
6
7
4
5
1
2
3
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Output
Assignment
Group 1
N.C.
Common B
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC B
0X(Y+1)17
0X(Y+1)16
0X(Y+1)15
0X(Y+1)14
0X(Y+1)13
0X(Y+1)12
0X(Y+1)11
0X(Y+1)10
0X(Y+1)07
0X(Y+1)06
0X(Y+1)05
0X(Y+1)04
0X(Y+1)03
0X(Y+1)02
0X(Y+1)01
0X(Y+1)00
Table 3.H
1791-IOVX Output Terminal Addressing for Groups 0 and 1 (TRM3)
Terminal
Number
31
32
33
34
27
28
29
30
35
36
37
23
24
25
26
20
21
22
Output
Assignment
Group 0
Common A
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC A
Program
Address
0XY07
0XY06
0XY05
0XY04
0XY03
0XY02
0XY01
0XY00
0XY17
0XY16
0XY15
0XY14
0XY13
0XY12
0XY11
0XY10
1
07
10
11
12
13
14
15
16
17
-COM
+VDC
01
00
L
02
03
04
05
06
NC
OUTPUT
0
07
06
11
10
13
12
15
14
17
16
-COM
+VDC
01
00
L
02
03
05
04
1 2
10941-I
3-13
Chapter 3
Configuring Your Block I/O
Terminal
Number
Program
Address
12
13
14
15
10
11
8
9
16
17
18
19
6
7
4
5
1
2
3
Where: X = Rack Number (1, 2, 3 ...)
Y = Module Group (0-7)
Output
Assignment
Group 3
N.C.
Common D
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC D
0X(Y+3)17
0X(Y+3)16
0X(Y+3)15
0X(Y+3)14
0X(Y+3)13
0X(Y+3)12
0X(Y+3)11
0X(Y+3)10
0X(Y+3)07
0X(Y+3)06
0X(Y+3)05
0X(Y+3)04
0X(Y+3)03
0X(Y+3)02
0X(Y+3)01
0X(Y+3)00
Table 3.I
1791-IOVX Output Terminal Addressing for Groups 2 and 3 (TRM4)
37
Terminal
Number
31
32
33
34
27
28
29
30
35
36
37
23
24
25
26
20
21
22
Output
Assignment
Group 2
Common C
Output 17
Output 16
Output 15
Output 14
Output 13
Output 12
Output 11
Output 10
Output 07
Output 06
Output 05
Output 04
Output 03
Output 02
Output 01
Output 00
VDC C
Program
Address
0X(Y+2)07
0X(Y+2)06
0X(Y+2)05
0X(Y+2)04
0X(Y+2)03
0X(Y+2)02
0X(Y+2)01
0X(Y+2)00
0X(Y+2)17
0X(Y+2)16
0X(Y+2)15
0X(Y+2)14
0X(Y+2)13
0X(Y+2)12
0X(Y+2)11
0X(Y+2)10
2
GROUP No.
3
2
11
10
13
12
15
14
17
16
-COM
+VDC
01
00
L
03
02
05
04
07
06
NC
11
10
13
12
15
14
16
17
-COM
+VDC
01
00
L
03
02
05
04
07
06
36
Summary
10942-I
In this chapter you learned how to set the configuration switches and the rack addresses for input and output terminals.
3-14
Chapter
4
Troubleshooting
Chapter Objectives
Indicators
In this chapter you will learn about the indicators on the block I/O module, and how to use them to troubleshoot the unit.
Each block I/O module has indicators (Figure 4.1) which provide indication of specific functions. Each module has the following:
Status Indicators - Indicators are provided for power, active, communication and fuse blown indications. An LED array provides input/output status.
POWER Indicator -
- green -on continuously if customer voltage is present; off if power is not applied or there is an internal power supply problem.
ACTIVE Indicator -
- red if the CPU is not running; green if the CPU is operating correctly.
COMM Indicator - indicates the status of the RIO link.
- green when communication is correctly established; off when communication is not established; flashing when programmable controller is in PROG mode.
FUSE Indicator - indicates the status of the 4 output fuses.
- off if all 4 fuses are intact; red if any one of the fuses opens.
The I/O status array is an 8 by 8 array of 64 LEDs capable of displaying the status of 32 inputs and 32 outputs at any one time. Pushbuttons are provided to toggle the display between the lower 32 bits and the upper
32 bits.
Refer to Table 4.A below for status indications reported by the indicators.
4-1
Chapter 4
Troubleshooting
Figure 4.1
Indicators on the 1791-IOBX and -IOVX Block I/O Modules (PLC labels shown)
POWER
ACTIVE
COMM
FUSE
00
01
02
03
04
05
06
07
10
11
12
14
13
16
15
17
NC
COM
COM
00
01
02
03
04
06
05
10
07
12
11
RACK
ADDR
POWER
ACTIVE
COMM
FUSE
8 7 6 5 4 3 2 1
CONFIGURATION
SWITCHES
DISPLAY
SELECT
INPUT
OUTPUT
+VDC
00
01
02
03
04
05
06
07
10
11
12
13
15
14
16
17
COM
+VDC
00
01
02
03
04
05
06
07
10
11
INPUT
00 10 00 10
01 11 01 11
02 12 02 12
03 13
04 14
03
13
04 14
05 15 05 15
06 16 06 16
07 17 07 17
0:1 2:3
LED
GROUP 0:1 2:3
OUTPUT
00 10 00 10
01 11 01 11
02 12 02 12
03 13 03 13
04 14 04 14
05 15 05 15
06 16
07 17
06 16
07 17
DISPLAY
SELECT indicates LED off - lower 32 bits are displayed indicates LED on - upper 32 bits are displayed
INPUT
OUTPUT
Press Input and Output pushbuttons simultaneously to reset Processor Restart Lockout.
10943-I
4-2
Chapter 4
Troubleshooting
(green)
Indication
Green
I/O status on/off
Off
Solid green
Off
COMM
Flashing green
Green
(green/red)
Red
(red)
Red
Off
Table 4.A
Troubleshooting Chart
Normal indication
Probable Cause Corrective Action
None required
No 24V dc power connected, or hardware fault.
Check 24V dc power to block
Normal indication - module is communicating with the programmable controller
None required
No communication with adapter, scanner etc.
Check that power LED is on. Make sure that proper number of blocks are configured.
Reset command (or output disable bit for SLC) has been issued by processor, scanner or adapter.
SLC or programmable controller not in run mode.
Check program. Correct as necessary.
Place in run mode.
Normal indication None
Internal CPU fault Return module for repair
One or more fuses are open
Normal indication
Replace blown fuse
None required
Replacing a Fuse
The block I/O module has one fuse for each group of outputs. To replace a fuse, proceed as follows.
1.
Remove power to the block I/O module.
ATTENTION: Remove power to the block I/O module before attempting to replace the fuse.
Failure to remove power from the block I/O module could cause injury or equipment damage due to possible unexpected operation.
Failure to remove power from the module could cause module damage, degradation of performance or injury.
2.
Remove the 5 screws securing the cover to the block I/O module.
3.
Locate and remove the blown fuse.
4-3
Chapter 4
Troubleshooting
Summary
4.
Replace the blown fuse with a 5.0A slow blow fuse.
5.
Reinstall cover and secure with 5 screws removed in step 2.
6.
Reapply power to the module.
In this chapter you learned what the LED indicators represent, and how to interpret them.
4-4
Appendix
A
Specifications
General Specifications
External power
Power Dissipation
Thermal Dissipation
Remote I/O Isolation
Interconnect cable length
PLC or SLC
Range: 18 to 26.4V dc
300mA @ 24V dc; initial surge 2.0A for 10msec
25.2 Watts (maximum); 15.2 Watts (typical)
86.2 BTU/hr (maximum); 51.9 BTU/hr (typical)
850V dc (transformer) for 1 second
RIO: 57.6K
115.2K
230.4K
RIO – Belden 9463
10,000 cable–feet
5,000 cable–feet
2,500 cable–feet
Cable requirements
Dimensions
Conductors Wire Size
Category
Inches: 6.15W x 13.0H x 1.72D
Millimeters: 156.21W x 334.0H x 43.7D
14 gauge (2mm
2
) stranded (maximum)
3/64 inch (1.2mm) insulation (maximum)
2
1
Environmental Conditions
Operating Temperature
Storage Temperature
Relative Humidity
Operating
Non-operating
32 to 140 o
F (0 to 60
–40 to 185 o o
C)
F (–40 to 85 o
5 to 95% noncondensing
5 to 80% noncondensing
C)
1
Refer to publication 1770–4.1, Programmable Controller Wiring and Grounding Guidelines
Input Specifications
Number of Inputs
Input type
On-state voltage range
On–state input current
Off–state voltage
Off–state current
Turn On time
Turn Off time
Input to System Isolation
Group to Group Isolation
64 (4 groups of 16)
1791–IOBX – Sinking; 1791–IOVX – Sourcing
12.0 to 26.4V dc
1.56mA (minimum)
7.0V dc (maximum)
1.0mA dc (maximum)
10msec (maximum) (+4msec)
10msec (maximum) (+4msec)
1500V ac (opto) for 1 second
1500V ac (air gap) for 1 second
A-1
Appendix A
Specifications
Output Specifications
Number of outputs 64 (4 groups of 16)
1791–IOBX – Source; 1791–IOVX – Sink Output type
Maximum output range 18.0 to 26.4V dc @ 300mA resistive
Maximum on–state voltage drop 1.5V dc maximum @ 25 o
C at rated current
Maximum on–state current
Minimum on–state current
300mA per point (maximum)
5mA (minimum)
Output Current per output group 2.4A maximum continuous
Surge Current 1.0A for 25ms (maximum), 1 pulse per second max.
Off–state voltage
Off–state leakage current
Turn on time
Turn off time
Fuse Type
Output to System Isolation
Group to Group Isolation
26.4V dc (maximum)
0.5mA (maximum)
2.0ms (maximum)
2.0ms (maximum)
5.0A slow blow (5 X 20mm size) – one per group
1500V ac (opto) for 1 second
1500V ac (air gap) for 1 second
A-2
Index
B
baud rate, 3-1, 3-3
C
compatibility, 1-1 extended node numbers, 2-15 configuration switches, 3-3 setting, 3-1 connection, in a PLC system, 1-6 connections, wiring, 2-3
D
description, 1-1
IOBX, 1-3
IOVX, 1-4 dimensions, mounting, 2-1
E
extended node capability, 2-14
F
fuses, removing and replacing, 4-3
G
group address, 3-1, 3-3
I
image table usage, 3-5 indicator active, 1-3 communication, 1-3 fuse blown, 1-3 power, 1-3 indicators
I/O status array, 1-3 locations, 4-2 status, 1-3 status reported, 4-1 input, sourcing, 1-5 input terminal addressing
IOBX groups 0 and 1, 3-7
IOBX groups 2 and 3, 3-8
IOVX groups 0 and 1, 3-11
IOVX groups 2 and 3, 3-12 inputs, sinking, 1-4 installation, termination resistor, 2-14
L
last rack, 3-1, 3-3
LED indicators, 4-1
M
mounting, clearance, 2-3
O
output, sinking, 1-5 output terminal addressing
IOBX groups 0 and 1, 3-9
IOBX groups 2 and 3, 3-10
IOVX groups 0 and 1, 3-13
IOVX groups 2 and 3, 3-14 outputs, sourcing, 1-4
P
power requirements, 2-12 processor restart lockout, 3-1, 4-2
R
rack address, 3-1
S
sinking inputs, 1-3 description, 1-4 sourcing outputs, 1-3 description, 1-4 specifications, A-1 switch configuration, 1-3 rack address, 1-3 termination resistor, 1-3 switch assemblies, 1-3 switch settings, 3-3
T
termination resistor installation, 2-14 internal, 3-1 troubleshooting chart, 4-3
I-1
Index
W
wiring block designations, 2-11 cable requirements, 2-12
IOBX input terminals
0 and 1, 2-4
2 and 3, 2-5
IOBX output terminals
0 and 1, 2-6
2 and 3, 2-7
IOVX input terminals
0 and 1, 2-8
2 and 3, 2-9
IOVX output terminals
0 and 1, 2-10
2 and 3, 2-11 remote I/O link, 2-12 wiring connections, 2-3 wiring terminals, 1-2
1995 Allen–Bradley Company, Inc.
PLC is a registered trademark of Allen–Bradley Company, Inc.
PLC–2 is a registered trademark of Allen–Bradley Company, Inc.
PLC–3 is a registered trademark of Allen–Bradley Company, Inc.
PLC–5 is a registered trademark of Allen–Bradley Company, Inc.
PLC–5/250 is a registered trademark of Allen–Bradley Company, Inc.
SLC is a registered trademark of Allen–Bradley Company, Inc.
I-2
Allen-Bradley, a Rockwell Automation Business, has been helping its customers improve productivity and quality for more than 90 years. We design, manufacture and support a broad range of automation products worldwide. They include logic processors, power and motion control devices, operator interfaces, sensors and a variety of software. Rockwell is one of the worlds leading technology companies.
Worldwide representation.
Argentina
•
Australia
•
Austria
•
Bahrain
•
Belgium
•
Brazil
•
Bulgaria
•
Canada
•
Chile
•
China, PRC
•
Colombia
•
Costa Rica
•
Croatia
•
Cyprus
•
Czech Republic
•
Denmark
•
Ecuador
•
Egypt
•
El Salvador
•
Finland
•
France
•
Germany
•
Greece
•
Guatemala
•
Honduras
•
Hong Kong
•
Hungary
•
Iceland
•
India
•
Indonesia
•
Ireland
•
Israel
•
Italy
•
Jamaica
•
Japan
•
Jordan
•
Korea
•
Kuwait
•
Lebanon
•
Malaysia
•
Mexico
•
Netherlands
•
New Zealand
•
Norway
•
Pakistan
•
Peru
•
Philippines
•
Poland
•
Portugal
•
Puerto Rico
•
Qatar
•
Romania
•
Russia–CIS
•
Saudi Arabia
•
Singapore
•
Slovakia
•
Slovenia
•
South Africa, Republic
•
Spain
•
Sweden
•
Switzerland
•
Taiwan
•
Thailand
•
Turkey
•
United Arab Emirates
•
United Kingdom
•
United States
•
Uruguay
•
Venezuela
•
Yugoslavia
Allen-Bradley Headquarters, 1201 South Second Street, Milwaukee, WI 53204 USA, Tel: (1) 414 382-2000 Fax: (1) 414 382-4444
Publication 1791–6.5.2 – February 1995
Supersedes publication 1791–6.5.2 – August 1993
P/N 955121–06
Copyright 1995 Allen-Bradley Co. Inc. Printed in USA

Public link updated
The public link to your chat has been updated.
Advertisement
Key features
- Self-contained remote I/O
- Includes power supply
- Programmable controller interface
- Input/output connections
- Signal conditioning circuitry
- Compatible with PLC-2, PLC-3, PLC-5, and SLC 500 controllers
- Removable terminal blocks for easy wiring
- Configuration switches for baud rate, last state, PRL, last rack, and I/O group
- Rack address switch for selecting the system rack address
- Status indicators for power, active, communication, and fuse blown