ABB AC31 Assembly And Operation Manual page 34

AC31 Adapters
Replacement devices: CPU > Replacement device 07KT9x-AD
Characteristics of the analog inputs:
● The 8 analog inputs are not electrically isolated. The internal PTC connection is connected
to earth ZP (existing device: earth M). Depending on sensor type or measuring principle,
this may result in wiring adjustments.
● Resolution:
–
–
–
–
–
Connection examples for analog transmitters are shown below.
34
Reference to earth ZP: connect ZP to several connectors. In the example, ZP is
connected to connector X3.
Range 0 ... 10 V: 12 bit
Range -10 ... +10 V: 12 bit + sign
Range 0 ... 20 mA: 12 bit
Range 4 ... 20 mA: 12 bit
Range RTD (Pt100, PT1000, Ni1000): 0.1 °C
3ADR010122, 8, en_US 2018/09/24