Siemens SIMATIC NET S7-300 Operating Instructions

4.1 Important notes on using the device
Read the safety notices
Note the following safety notices. These relate to the entire working life of the device.
WARNING
If a device is operated in an ambient temperature of more than 55 °C, the temperature of the
device enclosure may be higher than 70 °C. The device must therefore be installed so that it is
only accessible to service personnel or users that are aware of the reason for restricted access
and of the required safety measures at an ambient temperature higher than 55 to 70 °C.
WARNING
If the cable or conduit entry point exceeds 70 °C or the branching point of conductors exceeds
80 °C, special precautions must be taken. If the equipment is operated in an air ambient in
excess of 60 ℃, only use cables with admitted maximum operating temperature of at least 80
℃.
NOTICE
Improper mounting
Improper mounting may damage the device or impair its operation.
• Before mounting the device, always ensure that there is no visible damage to the device.
• Mount the device using suitable tools. Observe the information in the respective section
about mounting.
Safety notices on use in hazardous areas
General safety notices relating to protection against explosion
WARNING
EXPLOSION HAZARD
Do not open the device when the supply voltage is turned on.
WARNING
EXPLOSION HAZARD
Replacing components may impair suitability for Class 1, Division 2 or Zone 2.
Installation
4.1 Important notes on using the device
Compact Switch Module CSM 377
20 Operating Instructions, 06/2022, A2B00073499-02

Siemens SIMATIC NET S7-300 Specifications

General

Product Type Designation	SIMATIC NET S7-300
Mounting	DIN rail mounting
Protection Class	IP20
CPU Models	Various models available (e.g., CPU 312, CPU 314)
Communication Interfaces	MPI, PROFIBUS DP
Power Supply	24 V DC power supply required. Different power supply modules available.
I/O Modules	Digital input modules, digital output modules, analog input modules, analog output modules
Programming	STEP 7 software
Supply Voltage	24V DC or 120/230V AC (depending on model)
Digital Inputs	Available via digital input modules
Digital Outputs	Available via digital output modules
Analog Inputs	Available via analog input modules
Analog Outputs	Available via analog output modules
Communication Functions	MPI, PROFIBUS DP, Ethernet (depending on model)
Protocols	MPI, PROFIBUS DP, TCP/IP (depending on model)
Operating Temperature	0°C to 60°C
Storage Temperature	70 °C
Memory	Depends on CPU model (e.g., 32 KB to 1.5 MB)