REPAIR/REPLACEMENT PROCEDURES
TERMINATION UNIT REPLACEMENT PROCEDURES
4 - 2
I-E96-419A
®
performance and certification of the unit. When replacing a ter-
mination unit, verify that:
1. The proper fuse has been installed on the replacement ter-
mination unit.
2. All dipshunts are configured on the replacement termina-
tion unit the same as on the failed unit.
3. The module terminated by the faulty termination unit
should be disconnected from the termination unit cable before
the KTU cable is disconnected from the termination unit. Pull
the module out of its module mounting unit slot so that its
edge connector is not in contact with the termination cable
connected to the module mounting unit backplane.
NOTE: Turn off power to the cabinet before removing the +24 VDC
and grounding connection to the termination unit.
To replace the termination unit:
1. Label and remove all field wiring from the terminal blocks
(TB1 and TB2).
2. Label and disconnect the cables connected to the termina-
tion unit.
3. Label and disconnect system I/O power, common and
shield wires from the terminals.
4. Remove the two screws securing the termination unit to the
field termination panel and slide out the termination unit.
5. Insert the tabs of the circuit board into the proper slots of
the field termination panel standoff and slide the new circuit
board into position.
6. Secure the termination unit circuit board to the field termi-
nation panel with two screws.
7. Connect all wiring.
8. Connect the cables that were removed in Step 2.
9. Verify all connections to the termination unit.
10. Energize the cabinet power supply that provides power to
the termination unit.
Table 4-1. Recommended Spare Parts List
Description
Part Number
Fuse (F1) 0.25 A/250 V
194776A12500
