Sm 321; Di 8 X Ac 120/230 V, 6Es7 321-1Ff01-0Aa0 - Siemens SIMATIC S7-400H Manual

Connection Examples for Redundant I/O
F.1

SM 321; DI 8 x AC 120/230 V, 6ES7 321-1FF01-0AA0

The following diagram shows the connection of two redundant sensors to two
SM 321; DI 8 x AC 120/230 V. The sensors are always connected to Channel 0.
Figure F-1
F-2
Connection example SM 321; DI 8 x AC 120/230 V
1N
120/230V
1N
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07