Siemens SIMATIC S7-1500 Manual page 13

Wiring and block diagram
The example in the following figure shows the terminal assignment and the assignment of
the channels. The individual channels are connected with a relay.
Note
Note that the 24 V DC supply voltage for this module must always be supplied by terminals
19/20 and 39/40. Use the supplied potential jumpers for this purpose.
①
②
L+
M
Figure 3-1
Digital output module DQ 16x230VAC/2A ST Relay (6ES7522-5HH00-0AB0)
Manual, 07/2017, A5E34934019-AC
Relay 16x
Backplane bus interface
Power supply 24 V DC for relay contacts ERROR
Ground
Block diagram and terminal assignment
CHx Channel or channel status LED (green)
RUN Status display LED (green)
Error display LED (red)
PWR POWER supply voltage LED (green)
Wiring
13