
48
Operating Manual
OMBG3000 – Iss.01
© Copyright 2016
4.10
Modbus Digital Output
If Modbus digital outputs are being used, the cable must enter the enclosure
via a suitably rated cable gland (see
Cable Gland Selection and Cord
Cable Conductor Sizes and Insulation
), through the data outputs customer cable entry point (see
Figure 3 - BIOGAS 3000 customer connections
A label within the system identifies the appropriate outputs ‘+’, ‘-‘, and ‘LG’.
Refer to annotation 10 on
Figure 2 - BIOGAS 3000 internal components
Modbus terminal connections.
Warning
The BIOGAS 3000 Modbus terminals must only be used
for standard Modbus communications. No other
connections must be made as they could make the
equipment unsafe resulting in a hazard and invalidate
the ATEX/IECEx certification.
Wiring the BIOGAS 3000 Modbus Outputs
4.10.1
Warning
Only a qualified person should make electrical
connections to the system.
Ensure the power is isolated.
Cable glands should meet the requirements of
Gland Selection and Cord Anchorage
Cable insulation and conductor sizes must meet the
requirements of
Cable Conductor Sizes and Insulation
If using armored cable, the armor must not be used as
the main earth connection for the BIOGAS 3000. If
earthing of the armor is required, this must not be taken
from the BIOGAS 3000.
All cables should be crimped with an appropriate
insulated ferrule for the size of the cable being used. In
addition, the cable insulation must be housed
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