Digital Modules
3-18
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
3.7 Digital Input Module SM 321; DI 16 x VDC 24;
(6ES7321-1BH02-0AA0)
Order number: “Standard module”
6ES7321-1BH02-0AA0
Order number: SIPLUS S7-300 module
6AG1321-1BH02-2AA0
Characteristics
The digital input module SM 321; DI 16 x 24 VDC has the following salient
features:
• 16 inputs, isolated in groups of 16
• 24 VDC rated input voltage
• Suitable for switches and two / three / four-wire BEROs (proximity switches).
Terminal assignment and block diagram of the SM 321; DI 16 x 24 VDC
Status display – green
Channel number
Backplane bus
interface
M
24 V
Figure 3-4 Module View and Block Diagram of Digital Input Module SM 321; DI 16 x 24VDC
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