Siemens SIMATIC NET S7-300 Operating Instructions

Maintenance and troubleshooting
5
WARNING
Unauthorized repair of devices in explosion-proof design
Risk of explosion in hazardous areas
• Repair work may only be performed by personnel authorized by Siemens.
WARNING
Impermissible accessories and spare parts
Risk of explosion in hazardous areas
• Only use original accessories and original spare parts.
• Observe all relevant installation and safety instructions described in the manuals for the
device or supplied with the accessories or spare parts.
CAUTION
Hot surfaces
Risk of burns during maintenance work on parts with a surface temperature above 70 °C
(158 °F).
• Take appropriate protective measures, for example, wear protective gloves.
• Once maintenance work is complete, restore the touch protection measures.
NOTICE
Cleaning the housing
If the device is not in a hazardous area, only clean the outer parts of the housing with a dry cloth.
If the device is in a hazardous area, use a slightly damp cloth for cleaning.
Do not use solvents.
Compact Switch Module CSM 377
Operating Instructions, 06/2022, A2B00073499-02 33

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)