Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 284)

17–2 Maintenance and Troubleshooting
Publication 2755-833
The I/O Module Board has fuses for each of the eight modules. The
module fuses are located below the module connectors. When
replacing fuses, use Replacement Part No. 77104-899-01.
Figure 17.1 Module fuses
Module
Connectors (8)
Fuses (F1 - F8)
MOD2 MOD3 MOD4 MOD6 MOD7 MOD8
– 1 +
MOD1
– +
12 V
DC
– 2 + – 3 + – 4 +
MOD5
– 5 + – 6 + – 7 + – 8 +
F
1 F
2 F
3 F
4 F
5 F
6 F
7 F
8
+12 VDC Power
Source
100 mA Max
To replace a module fuse on the I/O board:
1. Disconnect power from decoder and module connectors.
2. Isolate cause of blown fuse and correct problem. See Appendix G
for details on the use of output modules with inductive loads.
3. Loosen the two screws which secure the cover of the decoder and
open.
4. Remove defective fuse by pulling it from the I/O board.
5. Align fuse pins over sockets in board before inserting fuse. Insert
new fuse into correct position (F1 - F8).
Note: The pins must puncture the silicon seal of the I/O board
sockets.
6. Close cover of decoder and tighten screws.
Note: The discrete I/O LED indicators still operate when a fuse is
blown.
Replacing Module Fuses