Digital Modules
3-16
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
3.6 Digital Input Module SM 321; DI 32 x 120 VAC;
(6ES7321-1EL00-0AA0)
Order number
6ES7321-1EL00-0AA0
Characteristics
The SM 321; DI 32 x 20 VAC features the following characteristics:
• 32 inputs, isolated in groups of 8
• 120 VAC rated input voltage
• Suitable for switches and two / three-wire AC proximity switches
Terminal assignment and block diagram of the SM 321; DI 32 x 120 VAC
Channel
number
Status display - green
1 L
L
L
L
2
3
4
1 N
2 N
3 N
4 N
backplane
bus
IM
Figure 3-3 ModuleView and Block Diagram of Digital Input Module SM 321; DI 32 x 20 VAC
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