Digital modules
3.15 Digital input module SM 321; DI 8 x 120/230 VAC (6ES7321-1FH01-0AA0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-43
Wiring and block diagrams of SM 321; DI 8 x AC 120/230 V
1
0
1
0
1
0
1
0
① Channel number
② Status display - green
③ Backplane bus interface
Technical data of SM 321; DI 8 x AC 120/230 V
Technical data
Dimensions and weight
Dimensions W x H x D (mm) 40 x 125 x 117
Weight approx. 240 g
Module-specific data
Isochronous mode supported No
Number of inputs 8
Cable length
• unshielded
• shielded
max. 600 m
max. 1000 m