Siemens SIMATIC S7-1500 Manual page 13

Tip: Using the potential jumpers
Use the potential jumpers supplied with the front connector if you want to distribute the 24 V
DC supply voltage to a neighboring module. This helps you to avoid having to terminate two
wires to one terminal.
Proceed as follows:
1. Connect the 24 V DC supply voltage to terminals 19 and 20.
2. Insert the potential jumpers between terminals 19 and 39 (L+) and between terminals 20
and 40 (M).
3. Use the terminals 39 and 40 to loop the potential to the next module.
Figure 3-2
Note
Ensure that the maximum current load of 8 A per potential jumper is not exceeded.
Digital output module DQ 16x230VAC/2A ST Relay (6ES7522-5HH00-0AB0)
Manual, 03/2015, A5E34934019-AA
Using the potential jumpers
Wiring
13