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4. WIRING
4.1.
W
IRING CONDITIONS
•
The transmitter is SELV supplied. In the case of DC supply the connection is
independent of polarity.
•
Only SELV circuits can be switched on to the relay output.
•
The house must be grounded to have noise protection; it should be
grounded to the equipotential bonding net.
•
3-wire DC powered devices can be created by connecting one of the power
supply wires to the white wire of the current output (GND). In this case the
current output becomes galvanically non-isolated.
•
The units and the cables should be arranged so that the fastening outside
the device relieves the end of the cable of any traction.
4.2.
C
ONNECTION CABLE EXTENSION
•
It is advised to use a terminal box when cable extension is necessary.
The shielding should be connected to the shielding of the extension cable and
it should be grounded at the processing unit.
I
OUT
+ HART
Green
Brown
Grey
White
Pink
Yellow
Grounding
Supply
Housing
Relay output
Colour codes of the outputs
Summary of Contents for EasyTREK SCD-300 Series
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