Siemens SIMATIC S7-300 Module data Hardware And Installation Manual

Appendix
S7-300 Programmable Controller Hardware and Installation
11-20 A5E00105492-01
Lightning-protection zone 0 (field side)
Ligtning-prot. zone 2
Ligtning-protection zone 1
Line in information system
Line in
power
system
Internal
line
Metal
part
Lightning
-prot.
Zone 3
device
Lightning-
protection equal
Local potential
equal
Building shield
(Steel reinforcing)
Room shield
(Steel reinforcing)
Device shield
(Metal casing)
Non-
electric
line
(metalic)
External
lightning prot.
-
Figure 11-6 Lightning protection zones of a building
Principle of the transition points between lightning protection zones
At the transitions points between lightning protection zones, you must take
measures to prevent surges being conducted downstream.
The principle of the lightning protection zone conception also specifies that all
cables which are capable of carrying lightning current (!) and installed at the
transition points of lightning protection zones must be included in the equipotential
bonding system.
Conductors and cables capable of carrying lightning current are:
• Metal pipes (e.g. water, gas and heat)
• Power cables (for example, mains voltage, 24 V supply)
• Data cables (for example, bus cable).
11.3.3 Rules for the transition point between lightning protection
zones 1
Rules for transition point 0 <-> 1 (Lightning protection equipotential bonding)
The following measures are suitable for lightning protection equipotential bonding
at the transition between lightning protection zones 0 <-> 1:

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)