ABB Symphony Harmony Series Instruction page 65

Termination Unit Replacement
When replacing a termination unit, observe the special han-
dling guidelines listed in
Remove a module from its assigned slot before installing or
CAUTION removing a cable assigned to that slot. Failure to do so could
result in damage to the module.
Follow Steps 1 through 17 to replace the termination unit.
1. Turn off power to the cabinet and remove the safety shield.
2. Disconnect the 24 VDC and I/O common wiring from the
E1 and E2 Faston connectors of the termination unit. Mark
the wires according to their terminal assignment as they are
removed.
3. If the termination unit is connected to an I/O module, pull
the I/O module out of its cable connection on the module
mounting unit backplane.
4. If there is a termination cable connected, disconnect it from
the P1 and P2 connectors on the termination unit.
5. Turn off power to the field devices. Disconnect I/O wiring
from the terminal blocks. Mark the wires according to their ter-
minal assignment.
6. When all cables and wires are removed from the termina-
tion unit, remove the two mounting screws and remove the ter-
mination unit from the field termination panel.
7. Verify that the dipshunts on the replacement termination
unit are the same as the dipshunt settings on the faulty termi-
nation unit.
8. Verify that the fuse is installed on the replacement termi-
nation unit.
9.
termination unit.
10. Secure the replacement termination unit circuit board to
the field termination panel with the two mounting screws.
4 - 2
NOTE: Turn off power to the field devices before removing the cables from the
termination unit.
Verify that the jumpers are installed on the replacement
Section 2.
WBPEEUI260047A0