Digital Modules
3-36
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
3.11 Digital Input Module SM 321; DI 16 x UC 24/48 V
(6ES7321-1CH00-0AA0)
Order number
6ES7321-1CH00-0AA0
Characteristics
The SM 321; DI 16 x UC24/48 V features the following characteristics:
• 16 inputs, isolated electrically
• Electrical isolation between channels of 120 V
• Rated input voltage from 24 to 48 DC)
• Inputs are fully independent and can be connected in any required configuration
Terminal assignment and block diagram of the SM 321; DI 16 x 24/48 VUC
3
1
2
0
3
1
2
0
7
5
6
4
7
5
6
4
8
7
10
9
6
2
5
4
1
38
37
40
39
36
32
35
34
31
28
27
30
29
26
22
25
24
21
18
17
20
19
16
13
12
15
14
11
3
23
33
Backplane bus interface
Status display – green
Channel number
Figure 3-11 Module View and Block Diagram of Digital Input Module SM 321; DI 16 x 24/48VUC
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