Siemens SIMATIC S7-300 Module data Reference Manual

Digital Modules
3-38
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
3.12 Digital Input Module SM 321; DI 16 x VDC 48-125;
(6ES7321-1CH20-0AA0)
Order number: “Standard module”
6ES7321-1CH20-0AA0
Order number: “SIPLUS S7-300-Module”
6AG1321-1CH20-2AA0
Characteristics
The SM 321; DI 16 x 48-125 VDC features the following characteristics:
• 16 inputs, isolated in groups of 8
• Rated input voltage 48 to 125 VDC
• Suitable for switches and two / three / four-wire BEROs (proximity switches).
Terminal assignment and block diagram of the SM 321; DI 16 x 48-125 VDC
Status display – green
Channel number
Backplane bus
interface
M
2M
48 to 125 V
M
1M
48 to 125 V
12
13
14
15
16
17
18
19
20
2
3
4
5
6
7
8
9
10
Figure 3-12 Module View and Block Diagram of SM 321; DI 16 x 48-125 VDC

Siemens SIMATIC S7-300 Module data Specifications

General

Series	S7-300
Manufacturer	Siemens
Protection Class	IP20
System	SIMATIC S7-300
Digital Inputs	Varies by module
Digital Outputs	Varies by module
Analog Inputs	Varies by module
Analog Outputs	Varies by module
Central Processing Unit	Varies by CPU model
Supply Voltage	24V DC or 120/230V AC
CPU Type	Varies (e.g., CPU 312, CPU 315, etc.)
Memory	Varies by CPU model
Communication Interfaces	MPI, PROFIBUS
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Relative Humidity	10% to 95% (non-condensing)