Siemens SIMATIC S7-300 Module data Reference Manual

Digital Modules
3-74
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
L+
green
L+ Monitoring
Fuse
Monitoring
Control
red
Group error display (1x)
red
Channel fault LED (8x)
Channel status LED (8x)
M
Output
(8x)
SF
Diagnostics
Status
F ƪ0 to 7ƫ
ƪ0 to 7ƫ
Output
drivers
(8 x)
Output
Backplane
bus
Logic
Figure 3-26 Block Diagram of the SM 322; DO 8 DC 24 V/0.5 A
Redundant control of a load
The output with series diode can be used for redundant control of a load.
Redundant control is possible from two different signal modules without external
circuitry. Both modules must have the same reference potential, M.
Note
If the output with series diode is used, external short-circuits to L+ cannot be
detected.

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)