Siemens SIMATIC User Manual

Digital modules
3.6 Digital input module SM 321; DI 64 x DC 24 V, sinking/sourcing; (6ES7321-1BP00-0AA0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
65
The table below shows how channel terminals are assigned to the terminal block for module
SM321; DI 64 X DC 24 V Sinking/Sourcing.
Terminal
Function
Terminal
Function
1
I x.0
2
I x+2.0
3 I x.1 4 I x+2.1
5
I x.2
6
I x+2.2
7 I x.3 8 I x+2.3
9
I x.4
10
I x+2.4
11
I x.5
12
I x+2.5
13
I x.6
14
I x+2.6
15
I x.7
16
I x+2.7
17
COM 0
18
COM 1
19
I x+1.0
20
I x+3.0
21
I x+1.1
22
I x+3.1
23
I x+1.2
24
I x+3.2
25
I x+1.3
26
I x+3.3
27
I x+1.4
28
I x+3.4
29
I x+1.5
30
I x+3.5
31
I x+1.6
32
I x+3.6
33
I x+1.7
34
I x+3.7
35
COM 0
36
COM 1
37
Not connected
38
Not connected
39
Not connected
40
Not connected
Note
The COM x te
rminals must be connected on the terminal block.

Siemens SIMATIC Specifications

General

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)