ABB ACS880-1607LC - Connection Details and Memory

Additional information on the connections
￭
Power supply for the control unit (XPOW)
The control unit is powered from a 24 V DC, 2 A supply (ZCU, BCU) or a 24 V DC, 2.9 A
supply (UCU) through terminal block XPOW. With a type BCU/UCU control unit, a
second supply can be connected to the same terminal block for redundancy.
Using a second supply is recommended, if:
• the control unit needs to be kept operational during input power breaks, for
example, because of continuous fieldbus communication
• immediate restart is needed after a power break (that is, no control unit power-up
delay is allowed).
￭
The X485 connector (BCU)
The X485 connector provides a connection for the optional CIO-01 I/O module. Refer
to CIO-01 I/O module for distributed I/O bus control user’s manual (3AXD50000126880
[English]) for more information.
This diagram shows the wiring for the module.
BCU CIO CIO
X485
B
A
BGND
SHIELD
X485
B
A
GND
SHIELD
X485
B
A
GND
SHIELD
￭
The X485 connector (UCU)
The X485 connector provides a connection for the optional CIO-01 I/O module. Refer
to CIO-01 I/O module for distributed I/O bus control user’s manual (3AXD50000126880
[English]) for more information.
This diagram shows the wiring for the module.
UCU CIO CIO
X485
B
A
BGND
SHIELD
X485
B
A
GND
SHIELD
X485
B
A
GND
SHIELD
74 The control unit