Siemens SIMATIC PCS 7 Operating Instructions

Line voltage
The following table indicates requirements to be observed for the line voltage.
In the case of ... then ...
Stationary plants or systems without all-
pole line voltage disconnect switch
A line voltage disconnect switch or a fuse must be present
in the building installation system
Load power supplies, power supply mod‐
ules
The rated voltage range setting must correspond to the line
voltage at the site
All power circuits of ET 200PA SMART The fluctuation/deviation of the input/load voltage from the
rated value must lie within the permissible tolerance
(refer to Technical Specifications of the ET 200PA SMART
modules or S7-300 modules)
24 V DC supply
The following table indicates requirements to be observed for the 24 V supply.
In the case of ... then ...
Buildings External lightning protection
must be ensured
Provide lightening protection meas‐
ures
(e.g. lightening protection units)
24 V DC supply cables, signal
lines
Internal lightning protection
must be ensured
24 V supply Safety extra-low voltage with safe electrical isolation
Protection from external electrical influences
The following table indicates requirements to be observed for protection from electrical
influences or faults.
In the case of ... then ...
All plants or systems in which the
ET 200PA SMART is integrated
Connection of the plant or system to the protective conductor must
be ensured for discharge of electromagnetic interference.
Connection, signal and bus lines Correct cabling and installation must be ensured.
Signal and bus lines It must be ensured that a break of a line or conductor strand does
not result in undefined states of the plant or system.
Assignment planning
2.3 Configuring the electrical structure
ET 200PA SMART
Operating Instructions, 06/2019, A5E34192013-AB 23

Siemens SIMATIC PCS 7 Specifications

General

Brand	Siemens
Model	SIMATIC PCS 7
Category	Control Systems
Language	English