Rockwell Automation 1492-CM800-LD006 User Manual
Fused Field Wire Conversion Module for Modicon B820-008 to 1756-OB8 or 1756-OC8
(Cat 1492-CM800-LD006)
10000021873 (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-LD006 conversion module provides field wire signal conversion from a Modicon® B820-008, 10
to 60Vdc, 8-pt output module to a ControLogix 1756-OB8, 10 to 30Vdc or 1756-OC8, 30 to 60Vdc, 8-pt output
module. The conversion module provides the mating connections to the B820-008 swing-arm (terminal block) with
the attached field wires. It routes those signals, via its 20-pin connector and a 1492-CABLEU pre-wired cable to
compatible terminals of the 1756-OB8 or 1756-OC8. To maintain the functionality of the B820-008 output module
the conversion module provides a mechanical fuse for each of the two power supplies (DC-0+ and DC-1+) on the
1756-OB8 and 1756-OC8 (refer to the below Wiring Diagrams for details).
II. Module Installation
The 1492-CM800-LD006 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).
Conversion Module Compatible 800
Output Module
Compatible 1756
Module
Required 1492 Cable
1492-CM800-LD006 B820-008 1756-OB8 1492-CABLEU
1492-CM800-LD006 B820-008 1756-OC8 1492-CABLEU
1492-CM800-LD006 Conversion Module
20-Pin Connector for 1492-CABLE
U
Mating Connector for
B800 Terminal Block
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)
10000021873 (Version 00)
IV. Conversion Module Wiring Diagram
The following diagram shows the connections from the existing B802-008 swing-arm, through the conversion module,
1492 cable and to the 1756-OA8 or 1756-OC8 output module. The diagram can be used as an aid in possible system
troubleshooting.
1756-OB8
1492-CABLE003U
Conversion Module Installation and Application Considerations
The voltage range of the B820-008 module is 10-60VDC and the 1756-OB8 is 10-30VDC. If the load source voltage is
greater than 30 VDC range, use the 1756-OC8.
The B820-008 module output current limits versus 1756-OB8 limits are as follows:
B820-008 1756-OB8 w/ 1492-CABLE003U
a) Current/Point 2A 2A
b) Current/Group 6A - c) Current/Module 12A 8A
d) Surge Current/Pt 10A for 10ms 4A for 10ms
The B820-008 has 4 groups (allowing 4 separate power supplies) and the 1756-OB8 has 2 groups. This module/cable
combination ties Groups 1 & 2 from the B820-008 to Group 0 on the 1756-OB8 and it ties Groups 3 & 4 from the B820-008
to Group 1 on the 1756-OB8. Field wiring modification must be made to accommodate this if multiple supplies were used.
If 4 supplies were used, 2 must be removed.
The B820-008 provided a single fuse per group. The 1756-OB8 is NOT fused. The 1492-CM800-LD006 provides a
5x20mm fuse per 1756-OB8 Group. Fuse rating for this configuration is 4 Amps.
The 1492-CABLE003U current is limited to 2A per pin.
Refer to your B820-008 and 1756-OB8 Installation Manual wiring schematics and diagrams.
Ensure 1756 output
module ratings are not exceeded.
[Reference Doc: 41170-755 (Version 03)]
1492-CM800-LD006
Conversion: B820-008 to 1756-OB8 with 1492-CM800-LD006
B820-008 Swing Arm
1
1 2
2 3
7 4
8 5
6
74
8
910
10
11
1214
13
20
11 15
12 16
17 17
18 18
19
20
14
Output 1
Output 3
Output 2
Output 4
LOAD
Supply Voltage Grp 1
Output 5
Output 7
Output 6
Output 8
3Common Grp 1
9Common Grp 2
13Common Grp 3
19Common Grp 4
5Not Used
6
15
16Not Used
Not Used
Not Used
2
DC-0(+)
OUT-0
3
OUT-1
5
OUT-2
7
OUT-3
9
OUT-4
4
OUT-5
6
OUT-6
8
OUT-7
10
12
14
16
18
11
13
15
17
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
RTN OUT-1
19
1
RTN OUT-0
20
RTN OUT-1
DC-0(+)
DC-0(+)
DC-0(+)
RTN OUT-0
DC-1(+)
DC-1(+)
DC-1(+)
DC-1(+)
Supply Voltage Grp 2
Supply Voltage Grp 3
Supply Voltage Grp 4
+
-
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. In addition, refer to the current draw requirements of the existing
loads for this configuration to ensure they are within the current ratings of the 1756 output module.
WARNING
(3)
10000021873 (Version 00)
IV. Conversion Module Wiring Diagram (Continued)
Conversion Module Installation and Application Considerations
The voltage range of the B820-008 module is 10-60VDC and the 1756-OC8 is 30-60VDC. If the load source voltage is
less than 30VDC range, use the 1756-OB8.
The B820-008 module output current limits versus 1756-OC8 limits are as follows:
B820-008 1756-OC8 w/ 1492-CABLE003U
a) Current/Point 2A 2A
b) Current/Group 6A - c) Current/Module 12A 8A
d) Surge Current/Pt 10A for 10ms 4A for 10ms
The B820-008 has 4 groups (allowing 4 separate power supplies) and the 1756-OC8 has 2 groups. This module/cable
combination ties Groups 1 & 2 from the B820-008 to Group 0 on the 1756-OC8 and it ties Groups 3 & 4 from the B820-008
to Group 1 on the 1756-OC8. Field wiring modification must be made to accommodate this if multiple supplies were used.
If 4 supplies were used, 2 must be removed.
The B820-008 provided a single fuse per group. The 1756-OC8 is NOT fused. The 1492-CM800-LD006 provides a
5x20mm fuse per 1756-OC8 Group. Fuse rating for this configuration is 4 Amps.
The 1492-CABLE003U current is limited to 2A per pin.
Refer to your B820-008 and 1756-OC8 Installation Manual wiring schematics and diagrams.
Ensure 1756 output
module ratings are not exceeded.
[Reference Doc: 41170-768 (Version 03)]
1756-OC8
1492-CABLE003U
1492-CM800-LD006
Conversion: B820-008 to 1756-OC8 with 1492-CM800-LD006
B820-008 Swing Arm
1
1 2
2 3
7 4
8 5
6
74
8
910
10
11
1214
13
20
11 15
12 16
17 17
18 18
19
20
14
Output 1
Output 3
Output 2
Output 4
LOAD
Supply Voltage Grp 1
Output 5
Output 7
Output 6
Output 8
3Common Grp 1
9Common Grp 2
13Common Grp 3
19Common Grp 4
5Not Used
6
15
16Not Used
Not Used
Not Used
Supply Voltage Grp 2
Supply Voltage Grp 3
Supply Voltage Grp 4
+
-
2
DC-0(+)
OUT-0
3
OUT-1
5
OUT-2
7
OUT-3
9
OUT-4
4
OUT-5
6
OUT-6
8
OUT-7
10
12
14
16
18
11
13
15
17
RTN OUT-1
19
1
RTN OUT-0
20
RTN OUT-1
DC-0(+)
DC-0(+)
DC-0(+)
RTN OUT-0
DC-1(+)
DC-1(+)
DC-1(+)
DC-1(+)
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
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. In addition, refer to the current draw requirements of the existing
loads for this configuration to ensure they are within the current ratings of the 1756 output module.
WARNING
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