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AS-Interface Analog Module
Connections, Displays and Operating Keys
Subject to reasonable modifications due to technical advances
Copyright Bihl+Wiedemann, Printed in Germany
Bihl+Wiedemann GmbH · D-68199 Mannheim · Phone +49-621-339960 · Fax +49-621-3392239 · Internet http://www.bihl-wiedemann.de
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4.5.1.4
Pin Configuration of the AS-Interface Pt100 Module in IP65 with 4 Channels
Connection of a 2-wire-Pt100 element to the AS-Interface Pt100 module in
IP65 with 4 channels:
Channel 1 applies to terminals 1 and 3, channel 2 applies to terminals 4 and 6,
channel 3 applies to terminals 7 and 9 and channel 4 applies to terminals 10 and
12.
Terminals 1, 4, 7 and 10 (Ch. +) are interconnected inside the module.
Connection of a 3-wire-Pt100 element to the AS-Interface Pt100 module in
IP65 with 4 channels:
Channel 1 applies to terminals 1 - 3, channel 2 applies to terminals 4 - 6, channel
3 applies to terminals 7 - 9 and channel 4 applies to terminals 10 - 12.
Terminals 1, 4, 7 and 10 (Ch. +) are interconnected inside the module.
3-wire-Pt100 sensors yield better results than 2-wire-sensors. For this, the feed
lines must be equal in resistance.
Switching between 3- and 2-wire-sensors takes place via AS-Interface parameter
bit 3.
The Pt100 moduls are deliverd with resistors between terminal 4 and 6, 7 and 9 as
well as 10 and 12. With that it is prevented that a fault message is notified by the
module when it is brought into service and only one sensor is attached.
Analog module
Pt100 element
Analog module
Pt100 element
Ch. +
Ch Sense -
Ch -
Ch. +
Ch Sense -
Ch -