
44
Operating Manual
OMBG3000 – Iss.01
© Copyright 2016
4.8
Cable Conductor Sizes and Insulation Requirements
Cable Conductor Sizes
4.8.1
Cable conductors must meet the following requirements, be suitable for the
environment, and distance to the supply:
Function Type
Conductor Size
Voltage
Rating
Current
Rating
Mains
supply
Tri-rated 0.14 – 4.0mm
2
solid
0.14 – 2.5mm
2
stranded
230Vac 3.15A
4-20mA
outputs
Twisted
pair
0.14 – 4.0mm
2
solid
0.14 – 2.5mm
2
stranded
24Vdc
20mA
Modbus
outputs
Twisted
pair
0.14 – 4.0mm
2
solid
0.14 – 2.5mm
2
stranded
12Vdc
83.3mA
Relays
Tri-rated 0.2 – 2.5mm
2
24Vdc
6A
Warning
Failure to meet the above requirements could make the
equipment unsafe resulting in a hazard and invalidate
the ATEX/IECEx certification.
Cable Insulation Requirements
4.8.2
In addition to the table below, the cable insulation must comply with a
recognised standard and have a flammability rating of V1 or better:
Function
Cable Insulation thickness (min)
Mains supply
0.6mm
4-20mA outputs
0.2mm
Modbus outputs
0.2mm
Relays
0.2mm
Warning
Failure to meet the above requirements could make the
equipment unsafe resulting in a hazard and invalidate
the ATEX/IECEx certification.
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