Siemens SIMATIC S7-1500 Manual page 56

Switching of loads
B.1 Connecting capacitive loads
Image B-2 Switching of capacitive loads for the F-DQ 8x24VDC/2A PPM digital output module in PP-switching mode
depending on the configured dark and light test times
The trends shown were plotted using a SIMATIC PS 307 10A power supply unit with a cable
length of 25 m (cable cross-section of 1.5 mm
F-DQ 8x24VDC/2A PPM output module and the load.
Note
The maximum readback time switch on test is only relevant if the light test is activated.
Remedy for detecting a short-circuit
1. Determine the load current and capacitance of the load.
2. Locate the operating point in the diagram above.
3. If the operating point is above the trend, select an actuator with higher current
consumption so that the new operating point is below the curve.
56
) between the output of the
2
Digital output module F-DQ 8x24VDC/2A PPM (6ES7526-2BF00-0AB0)
Manual, 01/2016, A5E03858037-AA