Siemens Simatic S7-300

Digital modules
3.8 Digital input module SM 321; DI 16 x DC 24 V; (6ES7321-1BL02-0AA0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-17
3.8 3.8 Digital input module SM 321; DI 16 x DC 24 V;
(6ES7321-1BL02-0AA0)
Order number: "Standard module"
6ES7321-1BH02-0AA0
Order number: "SIPLUS S7-300 module"
6AG1 321-1BH02-2AA0
Properties
Properties of SM 321; DI 16 x DC 24 V:
● 16 inputs, electrically isolated in groups of 16
● Rated input voltage 24 VDC
● suitable for switches and 2- /3-/4-wire proximity switches (BEROs)
Wiring and block diagrams of SM 321; DI 16 x DC 24 V



















0

















9
0
① Channel number
② Status display - green
③ Backplane bus interface