Simatic Rf600 - Siemens SIMATIC RF600 System Manual

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input (DI 0 ... 3)

● The inputs are optically isolated through optocouplers.

– Low: 0 ... 7 V

– High: 15 ... 24 V

The following diagrams illustrate various connection possibilities.

Minimum time between changes

Note that changes on the DI/DQ interface that are not applied for at least 1.5 seconds are

not detected by the reader.

Voltage infeed from internal source (no electrical isolation)

Circuit example 1: Digital inputs

Alternative connection possibilities:

● Pin 2 (VCC) to Pin 9 DI Common

● Pin 1 GND to busbar inputs

SIMATIC RF600

System Manual, 06/2019, J31069-D0171-U001-A22-7618

5.6 SIMATIC RF685R