Siemens SIMATIC S7-300 Module data Hardware And Installation Manual

Appendix
S7-300 Programmable Controller Hardware and Installation
11-14 A5E00105492-01
• The lower the impedance of an equipotential conductor, the more effective is
equipotential bonding.
• When shielded signal cables interconnect two system components and the
shielding is connected on both ends to ground/protective conductors, the
impedance of the additionally installed equipotential conductor must not exceed
10% of the shielding impedance.
• The cross-sectional dimension of an equipotential conductor must be sufficient
to handle the maximum equipotential current flow. Practical and proven
equipotential conductor cross-section is 16 mm
2
.
• Always use equipotential conductors made of copper or galvanized steel.
Always connect the cables on a large surface to the equipotential
busbar/protective conductor and protect it against corrosion.
• Route your equipotential conductor to minimize the area between the
equipotential conductor and signal lines as far as possible (see the figure
below).
Figure 11-5 Equipotential bonding
11.2.7 Cable routing inside buildings
Introduction
Inside buildings (inside and outside cabinets), clearances must be maintained
between groups of different cables to achieve the necessary electromagnetic

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)