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50 The control unit
Default I/O diagram of the supply control unit
The diagram below shows the default I/O connections on the supply control unit (A51), and
describes the use of the connections in the supply unit. Under normal circumstances, the
factory-made wiring should not be changed.
The wire size accepted by all screw terminals (for both stranded and solid wire) is 0.5 ...
2
2.5 mm
(24...12 AWG). The torque is 0.5 N·m (5 lbf·in).
Terminal
XD2D
1
B
1
2
2
A
3
3
BGND
4
4
Shield
D2D.TERM
X485
5
B
5
6
6
A
7
7
BGND
8
8
Shield
XRO1, XRO2, XRO3
11
NC
12
COM
13
NO
11
21
NC
12
22
COM
13
21
22
23
23
NO
31
32
33
31
NC
32
COM
33
NO
XSTO, XSTO OUT
1
OUT
1
2
SGND
2
3
IN1
3
4
4
IN2
5
5
IN1
6
6
SGND
7
7
IN2
8
8
SGND
XDI
Description
Drive-to-drive link
Not in use by default
Drive-to-drive link termination switch
RS485 connection
Cooling fan monitoring (CIO module)
Relay outputs
Norm. closed
Common
Norm. open
Norm. closed
Common
Norm. open
Norm. closed
Common
Norm. open
4)
Safe torque off
XSTO: Factory connection. Both circuits must be closed for the drive to start
(IN1 and IN2 must be connected to OUT).
XSTO OUT: Not in use.
Digital inputs
1)
2)
XRO1: Running
(Energized = running)
250 V AC / 30 V DC, 2 A
2)
XRO2: Fault (-1)
(Energized = no fault)
250 V AC / 30 V DC, 2 A
Note: If drive is equipped with a liquid cool-
ing unit, the relay output controls the cooling
unit start signal. Then the selection Fault(-
1) may also be changed to Started by bit
12 of parameter 195.12. See ACS880 diode
supply control program firmware manual
(3AUA0000103295 [English]).
3)
XRO3: MCB ctrl
(Energized = closes
main contactor/breaker) 250 V AC /
30 V DC, 2 A
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