Rockwell Automation 1492-CM800-LD007 User Manual
Field Wire Conversion Module for Modicon B821-108 to 1756-IB16 or 1756-IC16
(Cat 1492-CM800-LD007)
10000021878 (Version 00)
Printed in Germany
Local language (French, Italian, German & Spanish) versions of this document can be downloaded by going to www.ab.com.
In the left margin click on Publications Library and Literature Library. In the Search Area (right margin), Search by Catalog
Number and in the Search box type in the catalog number of the conversion system component.
I. Module Description
The 1492-CM800-LD007 conversion module provides field wire signal conversion from a Modicon® B821-108, 10 to
60Vdc, 8-pt output module to a ControLogix 1756-IB16, 10 to 31.2Vdc or 1756-IC16, 30 to 60Vdc 16-pt output
module. The conversion module provides the mating connections to the B821-108 swing-arm (terminal block) with the
attached field wires. It routes those signals, via its 20-pin connector and a 1492-CABLE(1)X pre-wired cable to
compatible terminals of the 1756-IB16 or 1756-IC16 (refer to the Wiring Diagrams on pages 2 and 3).
II. Module Installation
The 1492-CM800-LD007 conversion module must be installed in a 1492 conversion base-plate and cover-plate
assembly. The installation of the module into the assembly is explained in the Installation Manual that ships with the
conversion assembly. For a list of compatible assemblies refer to Appendix A.
III. Conversion Module Compatibility Matrix
This is the cable length in meters and tenths of meters (e.g. 015 = 1.5 meters). Recommended cable
length is 003 (00.3 meters).
20-Pin Connector for 1492-CABLE
X
Mating Connector for
B800 Terminal Block
Conversion Module Compatible 800
Input Module
Compatible 1756
Input Module
Required 1492 Cable
1492-CM800-LD007 B821-108 1756-IB16 1492-CABLEX
1492-CM800-LD007 B821-108 1756-IC16 1492-CABLEX
1492-CM800-LD007 Conversion Module
De-energize and lockout any and all power to all I/O field devices connected to the Modicon 800 I/O
housing, and the power to the 800 I/O housing itself. Ensure all power is de-energized and locked out to
any device in the control cabinet where the conversion is to be performed. Ensure work is performed by
qualified personnel.
WARNING
(2)
10000021878 (Version 00)
IV. Conversion Module Wiring Diagram
The following diagrams show the connections from the existing B821-108 swing-arm, through the conversion module, 1492
cable and to the 1756-IB16 or 1756-IC16 input module. The diagrams can be used as an aid in possible system troubleshooting.
1756-IB16
1492-CABLE003X
1492-CM800-LD007
Conversion: B821-108 to 1756-IB16 with 1492-CM800-LD007
B821-108 Swing Arm
3 1
1
19
2
3
7
4
8
5
11
6
12
7
17
8
18
9
10
11
4
12
10
13
14
20
155
166
1715
16 18
20
14
2
3
+
-
Input 5
Input 7
Input 6
Input 8
Input 1
Input 3
Input 2
Input 4
Group 1 Common
Not Used
Not Used
10
GND-0
IN-0
1
IN-1
2
IN-2
3
IN-3
4
IN-4
5
IN-5
6
IN-6
7
IN-7
8
IN-8
11
IN-9
12
IN-10
13
IN-11
14
IN-12
15
IN-13
16
IN-14
17
IN-15
18
Black
White
Red
Green
Orange
Blue
White/Black
Red/Black
Green/Black
Orange/Black
Blue/Black
Black/White
Red/White
Green/White
Blue/White
Black/Red
White/Red
Orange/Red
Blue/Red
Red/Green
GND-1
20
9
GND-0
19
GND-1
9
Group 2 Common
13
Group 3 Common
19
Group 4 Common
Group 1 Supply Volt
Group 2 Supply Volt
Group 3 Supply Volt
Group 4 Supply Volt
Not Used
Not Used
Conversion Module Installation and Application Considerations
The voltage range of the B821-108 module is 10-60V DC and the 1756-IB16 is 10-30V DC. If the input source voltage is
greater than 30V DC, use the 1756-IC16.
The input delay times for the B821-108 module versus 1756-IB16 module are as follows:
B821-108 1756-IB16
a) Off-to-On Delay 2.5ms (min),11ms (max) 1ms (plus selectable filter)
b) On-to-Off Delay 2.5ms (min),11ms (max) 2ms (plus selectable filter)
The B821-108 has 4 groups (allowing 4 separate power supplies) and the 1756-IB16 has 2 groups. This module/cable
combination ties Groups 1 & 2 from the B821-108 to Group 0 on the 1756-IB16 and it ties Groups 3 & 4 from the B821-108 to
Group 1 on the 1756-IB16. Field wiring modification must be made to accommodate this if multiple supplies were used. If 4
supplies were used, 2 must be removed. NOTE: To allow for multiple supplies in this conversion, the Inputs do not map directly
to the equivalent input. For example: Input 5 on the B821-108 maps to Input 8 on the 1756-IB16, the user needs to account for
this in the controller program.
Refer to your B821-108 and 1756-IB16 Installation Manual wiring schematics and diagrams for more details.
[Reference Doc: 41170-756 (Version 03)]
There are several key application considerations and system specifications (bottom of drawing) when
using these components (conversion module, cable and output module). Read and understand these
considerations before installation.
WARNING
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