Sm 321; Di 16 Dc 24 V, 6Es7 321-7Bh00-0Ab0 - Siemens SIMATIC S7-400H Manual

F.8

SM 321; DI 16 DC 24 V, 6ES7 321-7BH00-0AB0

The following diagram shows the connection of two redundant sensors to two
SM 321; DI 16 DC 24 V. The sensors are always connected to Channel 0 or
Channel 8.
Figure F-8
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
24V
Connection example SM 321; DI 16 x DC 24V
Connection Examples for Redundant I/O
CH0
Vs
Vs
CH8
CH0
Vs
Vs
CH8
F-9