Siemens SIMATIC S7-300 Module data Reference Manual

Digital Modules
3-14
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Terminal assignment and block diagram of the SM 321; DI 32 x 24 VDC
Channel
number
Status display – green
Backplane bus
interface
24V
24V
Figure 3-1 Module View and Block Diagram of the Digital Input Module SM 321; DI 32 x 24 VDC
Terminal assignment of the SM 321; DI 32 x 24 VDC
The following figure shows the assignment of the channels to the addresses.
Input byte x
Input byte (x+1)
Input byte (x+2)
Input byte (x+3)
Figure 3-2 Terminal assignment of the SM 321; DI 32 x 24 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)