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8027872/1JTM/0-8/2023-05| SICKO P E R A T I N G I N S T R U C T I O N S | FLOWSIC550
Subject to change without notice
7 ELECTRICAL INSTALLATION
7.3.1 Cable specifications
Cables
▸ Protect cables especially endangered by thermal, mechanical or chemical stress, e.g. by
laying in protective tubes.
▸ Cables must be flame-retardant according to DIN VDE 0472 Part 804. The fire behavior
according to B / IEC 60332-1 must be approved.
▸ The existing air and creepage paths according to EN 60079-7 or EN 60079-15 may not
be reduced by cable connections in the terminal box.
▸ Protect the wire ends with connector sleeves against fraying.
▸ Connect unused wires to ground or safeguard so that a short circuit with other conduc-
tive parts is excluded.
▸ Carry out potential equalization in accordance with EN 60079-14.
RS485
Supply voltage: 5 … 10 VDC
Recommended cable cross section: 0.25 … 1.5 mm², twisted pair, shielded
Maximum cable length: 500 m total length
Digital outputs
Recommended cable cross section: 0.25 … 1.5 mm²
Pressure and temperature sensor
Maximum cable length: 3 m
WARNING: Electrical hazard
▸ The cables and wires must be permanently installed. The plant operator
must provide adequate strain relief.
▸ Cables must have a permitted operating temperature of min. 70 °C
(158 °F).
NOTICE: Requirements on cables and installation
▸ Pay attention to the requirements in EN 60079-14 when selecting the
cables and during installation!
▸ Further legal requirements must be observed for use in explosive
atmospheres.
▸ Only copper wires may be used.
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