Rockwell Automation 2755-DM9, -DM9E High Speed Decoder - Manual (Page 133)

Chapter 9
Maintenance and Troubleshooting
9–3
The module fuses are located on the decoder circuit board next to the
modules (refer to Figure 9–2). To replace these fuses:
1) Disconnect the power from both the decoder and the module.
2) Isolate reason for fuse blowing and correct problem.
3) Remove module access cover.
Figure 9.2
Module Fuses
90–061–3
Fuse
4) Remove and install new fuse (Replacement Part No. W77104–899–01).
5) Install access cover, apply power, and test to verify operation of module.
Module Fuse Replacement