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Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
142 Troubleshoot with the Indicators
1734-OB2E, 1734-OB4E, and 1734-OB8E Source Output Modules
1734-OB2, 1734-OB4, and 1734-OB8 Source Output Modules
1734-OB2E 1734-OB4E
24VDC
Source
Output
Module
Status
Network
Status
1734
OB4E
NODE:
0
1
2
3
24VDC
Source
Output
Module
Status
Network
Status
1734
OB2E
NODE:
0
1
1734-OB8E
24VDC
Source
Output
Module
Status
Network
Status
1734
OB8E
0
1
2
3
NODE:
4
5
6
7
Module Status
Network Status
Module Status
Network Status
Module Status
Network Status
Status of Output 0
Status of Output 1
Status of Output 0
Status of Output 1
Status of Output 2
Status of Output 3
Status of Output 0 & 4
Status of Output 1 & 5
Status of Output 2 & 6
Status of Output 3 & 7
Indication Probable Cause Recommended Action
I/O Status
Off All outputs are inactive. None.
Yellow One or more output is active and under control. None.
Flashing red Open circuit detected - no load (Off-state only). Connect load or disable no load detection.
Solid red Short circuit detected (On-state only). Remove short or overloaded circuit.
Module Status
Network Status
Status of Output 0
Status of Output 1
Status of Output 2
Status of Output 3
1734-OB2 1734-OB4
Status of Output 0 & 4
Status of Output 1 & 5
Status of Output 2 & 6
Status of Output 3 & 7
Module Status
Network Status
1734-OB8
24VDC
Source
Output
Module
Status
Network
Status
1734
OB2
0
1
NODE:
24VDC
Source
Output
Module
Status
Network
Status
1734
OB4
0
1
2
3
NODE:
24VDC
Source
Output
Module
Status
Network
Status
1734
OB8
0
1
2
3
NODE:
4
5
6
7
Status of Output 0
Status of Output 1
Module Status
Network Status
Indication Probable Cause Recommended Action
I/O Status
Off All outputs are inactive. None.
Yellow One or more outputs is active and under control. None.