Siemens SIMATIC RF600 Series System Manual page 173

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The following diagrams illustrate various connection possibilities.

Minimum time between changes

Note that changes on the I/O 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, 11/2018, J31069-D0171-U001-A21-7618

5.5 SIMATIC RF685R