Siemens SIMATIC S7-1500 Manual page 35

The figure below shows an example of the pin assignment of the fail-safe digital output
module F-DQ 8x24VDC/2A PPM with connection of loads per digital output to L+ and M,
PM-switching mode.
To protect the F-module, always install an external fuse with the following properties for the
load circuit: Circuit-breaker 24 V DC/16 A, tripping characteristic type B.
①
Backplane bus interface
②
Microcontroller 1
③
P1 switch for channel groups 0 to 3
Image 5-2 Wiring diagram for 2 relay to 1 F-DQ of the digital output module F-DQ 8x24VDC/2A PPM, PM-switching
mode
Digital output module F-DQ 8x24VDC/2A PPM (6ES7526-2BF00-0AB0)
Manual, 01/2016, A5E03858037-AA
5.3 Application: Connection of loads per digital output to L+ and M, PM-switching mode
WARNING
④
Microcontroller 2
⑤
P1 switch for channel groups 4 to 7
⑥
Reverse polarity protection
Applications of the F-I/O module
35