Digital Modules
3-42
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
3.14 Digital Input Module SM 321; DI 8 x VAC 120/230;
(6ES7321-1FF01-0AA0)
Order number: “Standard module”
6ES7321-1FF01-0AA0
Order number: “SIPLUS S7-300-Module”
6AG1321-1FF01-2AA0
Characteristics
The SM 321; DI 8 x 120/230 VAC features the following characteristics:
• 8 inputs, isolated in groups of 2
• 120/230 VAC rated input voltage
• Suitable for switches and two / three-wire AC proximity switches
Terminal assignment and block diagram of the SM 321; DI 8 x 120/230 VAC
Channel number
Status display – green
M
1N
2N
M
M
3N
4N
M
Backplane bus in-
terface
Figure 3-14 Module View and Block Diagram of the SM 321; DI 8 x 120/230 VAC
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