ABB ACS 400 User Manual page 121

Code Description
5 = DI5
Interlocks function is in use. Depending on the number of motors, the digital inputs are reserved for the
interlock signals according to following table.
No of aux. motors
(param. 8117)
0
1
2
3
6 =
EXTERNAL IO
Interlocks function is in use. All interlock signals are taken through external I/O modules. Depending on the
number of motors, the digital inputs are reserved for the interlock signals according to following table.
No of aux. Motors
(param. 8117)
0
1
2
3
Interlock signals are active low, i.e. interlock is active when corresponding interlock signal is absent. If start
command is given when the interlock signal of the speed regulated motor is active, the ACS 400 will not
start, and will show alarm 30 (INTERLOCK) on the control panel.
Each Interlock circuit should be wired as follows:
1. A contact of the On/Off switch of the motor must be wired to the Interlock circuit. PFC logic detects if a
motor is switched off. The logic does not try to start the switched-off motor; the next available motor is
started instead.
2. A contact of the motor thermal relay (or another protective device in the motor circuit) must be wired to
the Interlock input. PFC logic detects if the thermal relay is activated. The motor is stopped.
ACS 400 User's Manual
ACS 400 digital
inputs
DI1-DI4: free
DI5: Motor 1
DI1-DI4: free
DI5: Motor 1
DI1-DI4: free
DI5: Motor 1
DI1-DI4: free
DI5: Motor 1
ACS 400 digital
inputs
DI1-DI5: free
DI1-DI5: free
DI1-DI5: free
DI1-DI5: free
Interlock signals
NDIO module 1
Not used
DI1: Motor 2
DI2: Unused
DI1: Motor 2
DI2: Motor 3
DI1: Motor 2
DI2: Motor 3
Interlock signals
NDIO module 1
DI1: Motor 1
DI2: Unused
DI1: Motor 1
DI2: Motor 2
DI1: Motor 1
DI2: Motor 2
DI1: Motor 1
DI2: Motor 2
NDIO module 2
Not used
Not used
Not used
DI1: Motor 4
DI2: Unused
NDIO module 2
Not used
Not used
DI1: Motor 3
DI2: Unused
DI1: Motor 3
DI2: Motor 4
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