Connecting The Interval Counter Input - Siemens SIMATIC SM 335 Manual

Connecting the Inputs and Outputs of the SM 335
Unused analog outputs
To ensure that unused analog outputs on the SM 335 are dead, you must deacti-
vate them and leave them open. An analog output is deactivated with HW Config.
2.4

Connecting the interval counter input

Non-Isolated
If you wire the interval counter input as a non-isolated input, connect pin 19 (M
and pin 20 (24 V power supply's zero potential).
Isolated
If you wire the interval counter input as an isolated input, you may not connect pin
19 (M ) to pin 20 (24 V power supply's zero potential).
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Additional information
See Section 4.3 for more information about connecting the interval counter input.
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SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
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6ES7 335-7HG00-8BA1