Siemens SIMATIC ET 200MP System Manual page 52

Wiring
6.1 Rules and regulations for operation
Line voltage
Below is described, what you must pay attention to with respect to the supply voltage (see
the chapter Statements on insulation, protection class, degree of protection, and rated
voltage (Page 105)):
● For fixed plants or systems without multipole circuit breaker, a mains disconnection
● For load power supplies, the configured rated voltage range must correspond to the local
● For all power circuits of the ET 200MP distributed I/O system, the fluctuation/deviation of
24 VDC supply
The following describes what you must pay attention to in terms of the 24 V DC supply:
● For buildings: In the event of danger through overvoltage, you must provide lightning
● For 24 V DC supply lines and signal lines: In the event of danger through overvoltage,
● For 24 V DC supply: Ensure safe (electrical) isolation of the low voltage (SELV/PELV) in
Protection against external electrical influences
The following describes what you must pay attention to in terms of protection against
electrical impacts and/or faults:
● For all plants or systems in which the ET 200MP distributed I/O system is integrated, you
● For supply, signal and bus lines, you must ensure that the laying of the lines and the
● For signal and bus lines, you must ensure that a wire/cable breakage or a cross-wire
Reference
Additional information can be found in the function manual, Designing interference-free
controllers (http://support.automation.siemens.com/WW/view/en/59193566).
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device (multipole) must be available in the building installation.
line voltage.
the line voltage from the rated value must be within the permitted tolerance.
protection measures for external lightning protection (e.g. lightning protection elements).
you must provide lightning protection measures for internal lightning protection (e.g.
lightning protection elements).
accordance with IEC 60364-4-41.
must ensure that the plant and/or system is connected to a protective conductor with
sufficient cross-section for conducting electromagnetic disturbances.
installation is correct.
does not lead to undefined states of the plant or system.
ET 200MP Distributed I/O System
System Manual, 01/2013, A5E03723484-01