Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 251)

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014 251
Status Indicators Appendix A
Troubleshooting Faults
Follow this troubleshooting procedure to diagnose field faults.
1. Note the affected channel as a field fault can indicate that there is a blown
fuse on an input channel.
2. Check the input field connections to the faulty channel to find the source
of the over voltage that caused the fuse to blow.
3. After you have removed the source of the over voltage, replace the blown
fuse by following these steps.
The fuse can be changed with the termination assembly still installed. You
do not have to remove it.
a. Lift the plastic cover that covers the fuses.
b. Use a fuse removal tool to lever the fuse out of the fuse holder and
replace the fuse.
You can use these types of replacement fuses.
c. Close the plastic cover.
Component Fuse Type
Analog Input Termination Assembly Littlefuse No. 396/TE5 50 mA time lag fuse; UL 248-14,
125 V, T Leadfree
Digital Input Termination Assembly Littlefuse No. 396/TE5 50 mA time lag fuse; UL 248-14,
125 V, T Leadfree
Digital Output Termination Assembly Littlefuse Type 451 Omni-Blok 10 A, 125 V very fast acting
fuse. Surface mount fuse block 154 010