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5.6
Cable gland and field wiring cables
With use of terminal block and cable gland:
The screwed cable gland must have following specifications:
• Ingress protection IP68
• Temperature range from -40°C to 10 K above max. ambient temperature
• UL or VDE certified (depending on the country where the unit is installed)
• Pull relief
Make sure that the screwed cable gland safely seals the cable and that it is tight (danger of
water intrusion).
The field wiring cables must have following specifications:
• The diameter has to match to the clamping range of the used cable gland.
• The cross section has to match with the clamping range of the connection terminals and
consider the max. current.
• The temperature rating must be at least 10 K above max. ambient temperature.
Cut the field wiring cables to appropriate length to fit properly into the housing.
5.7
M12 mating plug and field wiring cables
With use of M12 plug:
The mating plug must have following specifications
• M12x1 according to IEC 61076-2-101, female, 4-pole, coding A-standard
• Ingress protection IP68
• Temperature range from -40°C to 10 K above max. ambient temperature
The field wiring cables must have following specifications:
• The diameter and cross section has to match to the specification of the mating plug.
• The temperature rating must be at least 10 K above max. ambient temperature.
• Install the field wiring cables according to the instructions of the mating plug.
5.8
Relay protection
Provide protection for relay contacts / solid state relay against spikes with inductive loads
5.9
Protection against static charging
The unit must be earthed in any case to avoid static charging of the unit, especially on
applications with pneumatic conveying.
For Non-Ex units: Functional earthing is satisfactory, see Functional earthing (Page 26).
For Ex-units: The external equipotential bonding terminal must be connected to ground, see
Intrinsically safe version (Page 29).
SITRANS LCS100 2-wire mA and Relay Version
Operating Instructions, 05/2023, A5E52142831-AA
5.6 Cable gland and field wiring cables
Connecting
25
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