Drehmo i-matic Installations- und Betriebshandbuch - Seite 18

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Supplement operating manual for DREHMO i-Matic actuators with integrated
MODBUS fieldbus interface

2.6 Interface to external sensor - process inputs

Actuators of type i-Matic can be equipped with an optional interface for an external sensor.
The interface consists of four discrete inputs (24 V DC), and two analogue inputs
(4...20mA). The discrete inputs with common ground are galvanically isolated from the
electronic potential by optocouplers. The nominal current of the discrete inputs is 12 mA for
an input voltage of 24 V DC. The following picture shows the structure of the discrete
inputs.
- digital process inputs
The analogue inputs are connected to the electronic potential. The following pictures show
examples of how to use these inputs:
- connection with two wires
- connection with three wires
- connection with four wires
DREHMO GmbH
Zum Eichstruck 10
57482 Wenden/Germany
Fon: +49 27 62 9850-206
Fax: +49 27 62 9850-205
Internet:www.drehmo.com
Wenden, 21.03.12
Page 18 of 18
Prepared by: Ste