Connecting
4
4.1 Basic safety notes
WARNING
Safety extra low voltage
The equipment is designed for operation with Safety Extra-Low Voltage (SELV) by a Limited
Power Source (LPS). (This does not apply to 100 V...240 V devices.)
This means that only SELV / LPS complying with IEC 60950-1 / EN 60950-1 / VDE 0805-1
must be connected to the power supply terminals. The power supply unit for the equipment
power supply must comply with NEC Class 2, as described by the National Electrical Code (r)
(ANSI / NFPA 70).
There is an additional requirement if devices are operated with a redundant power supply:
If the equipment is connected to a redundant power supply (two separate power supplies),
both must meet these requirements.
WARNING
Suitable cables at high ambient temperatures
If the temperature of the cable or housing socket exceeds 70 °C or the branching point of
conductors exceeds 80 °C, special precautions must be taken.
If the device is operated at ambient temperatures of between 50 °C and 60 °C, only use cables
with a maximum permitted operating temperature of at least 80 °C.
4.1.1 ATEX/IECx special conditions for use
WARNING
WARNING – EXPLOSION HAZARD:
DO NOT CONNECT OR DISCONNECT EQUIPMENT WHEN A FLAMMABLE OR
COMBUSTIBLE ATMOSPHERE IS PRESENT.
Technology module TM SIWAREX WP351 HF
Operating Instructions, 01/2020, A5E47521010-AA 23
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