Fibroptic Model FG Thermometer
5.3 Cable requirements
Note
To comply with EMC requirements, the thermometer must be used with
screened cable.
The maximum overall cable diameter must not exceed 8mm/0.3in.
For short cable runs, when general interference is unlikely, use standard PVC 2
Core cable (BELDEN 2576 or equivalent).
For longer runs, or when interference is expected, use a screened cable (BELDEN
9302 or equivalent).
For extended high temperature environments, use a TEFLON insulated cable
(BELDEN 83319 or equivalent).
5.4 Screening and earthing details
Note
Screens or earth cores must be earthed at a single point on the indicator
unit.
The recommended implementation for multiple loops from a single isolated power
supply unit is shown schematically in Fig. 5-3.
Fibroptic
Model FG
A
Fibroptic
Model FG
B
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Fig. 5-3 Screening and Earthing Arrangement
Indicator A
Indicator B
User Guide
+
Isolated
24V d.c.
-
Power
Supply
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