Digital modules
3.13 Digital input module SM 321; DI 16 x 48-125 VDC; (6ES7321-1CH20-0AA0)
S7-300 Automation System Module data
3-38 Manual, 08/2006, A5E00105505-04
3.13 3.13 Digital input module SM 321; DI 16 x 48-125 VDC;
(6ES7321-1CH20-0AA0)
Order number: "Standard module"
6ES7321-1CH20-0AA0
Order number: "SIPLUS S7-300 module"
6AG1 321-1CH20-2AA0
Properties
Properties of SM 321; DI 16 x DC 48-125 V:
● 16 inputs, electrically isolated in groups of 8
● Rated input voltage 48 VDC to 125 VDC
● suitable for switches and 2- /3-/4-wire proximity switches (BEROs)
Wiring and block diagrams of SM 321; DI 16 x DC 48-125 V
0
0
0
0
9
9
① Channel number
② Status display - green
③ Backplane bus interface
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