ABB ACS880-37 Hardware Manual page 43

9 Fiber optic link to each inverter module. Similarly, each supply module is connected to the supply
control unit by fiber optic cables.
10 Terminal blocks for customer connections installed in the drive cabinet. For the locations, see
control cubicle (ACU) layout
11 Supply unit (consisting of one or more supply modules and LCL filters)
12 DC link
13 Inverter unit (consisting of one or more inverter modules)
14 Optional brake chopper (+D150) and resistors (+D151)
Operation principle and hardware description 43
(page 40). Wiring details are given starting on page 97.
Auxiliary