ABB AC31 Assembly And Operation Manual page 37

Measuring
ranges (passive
two pole sen-
sors)
Fig. 29: Connection of current sensors 4 ... 20 mA to the analog inputs
Protective func-
tions
2018/09/24
If the analog current sensors 4 ... 20 mA are supplied from a separate power
supply unit, the 0 V/GND connection of the power supply unit must be con-
nected to the ZP connection of the 07KT9x-AD.
CAUTION!
Risk of overloading the analog input!
If an analog current sensor supplies a current in excess of 25 mA for more than
1 second during initialization, this input is switched off by the module (input pro-
tection).
Use only sensors with fast initialization or sensors without current peaks higher
than 25 mA. If this is not possible, protect the input by connecting a 10-volt
zener diode in parallel to I+ and I-.
3ADR010122, 8, en_US
Replacement devices: CPU > Replacement device 07KT9x-AD
AC31 Adapters
37