ABB AC31 Assembly And Operation Manual page 40

AC31 Adapters
Replacement devices: CPU > Replacement device 07KT9x-AD
Fig. 31: Connection of Pt100 temperature sensors in 3-wire configuration
In order to keep measuring errors as small as possible, it is necessary to have all the involved
conductors in the same cable. All the conductors must have the same cross section.
Measuring values above range, below range and wire breaks are monitored and indicated.
For further information on protective function, error indication and diagnosis, please refer to the
AC500 documentation.
Use of analog
Data
inputs as digital
Input signal voltage
inputs
● Signal 0
● Undefined signal state
● Signal 1
Input resistance
Conversion cycle
ZP serves as reference signal for the inputs.
40
Value
24 V DC
● -30 V ... +5 V
● +5 V ... +13 V
● +13 V ... +30 V
approx. 3.5 kΩ
1 ms (for 4 inputs + 2 outputs)
1 s when measuring with resistance thermom-
eter Pt/Ni
3ADR010122, 8, en_US 2018/09/24