Switching Of Loads; Connecting Capacitive Loads - Siemens SIMATIC S7-1500 Manual

Switching of loads

B.1

Connecting capacitive loads

If an F-DQ 8x24VDC/2A PPM digital output module is interconnected with loads that require
little current and have capacitance, this can lead to detection of a short-circuit or overload.
Reason: The capacitance cannot be sufficiently discharged or charged during the configured
readback time of the bit pattern test.
The typical trends shown in the two figures below represent the correlation between load
impedance and maximum switched load capacitance at a supply voltage of 24 V DC.
Image B-1 Switching of capacitive loads for the F-DQ 8x24VDC/2A PPM digital output module in PM-switching mode
depending on the configured dark and light test times
Digital output module F-DQ 8x24VDC/2A PPM (6ES7526-2BF00-0AB0)
Manual, 01/2016, A5E03858037-AA
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