Siemens SIMATIC RF600 Series System Manual page 125

Voltage infeed from internal source
Figure 5-14
Alternative connection possibilities:
● Pin 1 GND to Pin 3 DO Common
● Pin 2 (VCC) to busbar outputs
SIMATIC RF600
System Manual, 11/2018, J31069-D0171-U001-A21-7618
Circuit example 4: Digital outputs
Readers
5.3 SIMATIC RF650R
125