AS-Interface Analog Module
Connections, Displays and Operating Keys
Subject to reasonable modifications due to technical advances
Copyright Bihl+Wiedemann, Printed in Germany
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Connection of a 4-wire-sensor to the analog input module in IP65 with 2
channels:
A 4-wire-sensor is attached to terminal 7 (24 V), 8 (Sig.+), 9 (0 V ext.) and 10
(Sig.-) of channel 1 (see figure above for details).
Corresponding channel 2 is attached via 1 (24 V) and 2 (Sig.+) as well as 3 (0 V
ext.) and 4 (Sig.-).
Analog input modules with 2 current inputs are delivered with a resistor between
terminals 1 and 2 and a bridge between terminals 3 and 4. With that, it is prevented
that a fault message for input channel 2 is notified by the module when it is brought
into service and only one sensor at input channel 1 is attached.
By using of a sensor at channel 2 the resistor and, if necessary, the bridge have
to be removed.
Connection of a sensor with own power supply to an analog input module in
IP65 with 2 channels
:
A sensor with own supply is attached to terminal 8 (Sig.+) and 10 (Sig.-) of
channel 1.
Corresponding channel 2 is attached via 2 (Sig.+) and 4 (Sig.-).
Analog module
4-wire-sensor
Analog module
Sensor with own power supply
24V ext.
Sig.+
Sig.-
GND
24V ext.
Sig.+
Sig.-
0V ext.
supply PELV
without earth
connection
