Siemens SIMATIC S7-300 Module data Hardware And Installation Manual

Wiring
S7-300 Programmable Controller Hardware and Installation
6-4 A5E00105492-01
6.2 Bonding the protective conductor to the profile rail
Prerequisite
The profile rail is fixed to the mounting surface.
Connecting the protective conductor
1. Connect the protective conductor to the rail,
using the M6 protective conductor bolt.
Minimum cross-section of the protective conductor: 10 mm
2
.
The figure below shows how the protective conductor must be bonded to the profile
rail.
Figure 6-1 Bonding the protective conductor to the profile rail
Note
Always ensure a low-impedance connection of the protective conductor. You can
achieve this by bonding a cable with low impedance and as short as possible to a
large contact surface.
For example, if the S7-300 is mounted on a hinged frame you must use a flexible
ground strap.

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)