Siemens SIMATIC NET S7-300 Operating Instructions

WARNING
The device is intended for indoor use only.
WARNING
The device may only be operated in an environment of contamination class 1 or 2 (see EN/IEC
60664-1, GB/T 16935.1).
WARNING
When used in hazardous environments corresponding to Class I, Division 2 or Class I, Zone 2,
the device must be installed in a cabinet or a suitable enclosure.
WARNING
EXPLOSION HAZARD
Do not connect or disconnect cables to or from the device when a 󹪞ammable or combustible
atmosphere is present.
WARNING
Unsuitable cables or connectors
Risk of explosion in hazardous areas
• Only use connectors that meet the requirements of the relevant type of protection.
• If necessary, tighten the connector screw connections, device fastening screws, grounding
screws, etc. according to the speci󹪝ed torques.
• Close unused cable openings for electrical connections.
• Check the cables for a tight 󹪝t after installation.
WARNING
Lack of equipotential bonding
If there is no equipotential bonding in hazardous areas, there is a risk of explosion due to
equalizing current or ignition sparks.
• Ensure that equipotential bonding is available for the device.
Installation
4.1 Important notes on using the device
Compact Switch Module CSM 377
Operating Instructions, 06/2022, A2B00073499-02 21

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)