ABB Symphony Harmony Series Instruction page 66

Termination Unit Replacement
11. Connect the termination unit cables to their assigned con-
nector on the termination unit.
12. Connect the I/O wiring to the terminal strips.
13. Connect the 24 VDC and common wiring to the E1 and E2
Faston connectors of the termination unit.
14. Push on the faceplate of the I/O module to fully insert it
into its module mounting unit slot. The I/O modules should be
seated in the termination unit cable at the rear of the module
mounting unit when fully inserted.
15. After all cables and wiring have been replaced, install the
safety shield and return power to the field devices.
16. Return power to the cabinet.
WBPEEUI260047A0 4 - 3