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ELECTRICAL CONNECTION
All wiring must be in accordance with local and national electrical codes and should be undertaken by
an experienced and qualified electrician.
Always use dust/liquid tight flexible metal conduit with approved fittings to protect the sensor cables.
Use rigid metal conduit to protect the cables from the sensors to the control unit. Conduit systems can
channel water due to ingress and condensation directly to sensors and sensor connections which over
time will adversely affect the performance of the system. As such, the installation of low point conduit
drains is recommended for all sensors.
All electrical connections are made via 3 sets of terminals provided as shown in image 1.
FUSE RATINGS -
In order to maintain the product certification, all fuses MUST be replaced with equivalent fuses at the
same rating. Failure to do so will invalidate the certification and any warranties which may exist.
Model WDC4V4C -
•
F1, F2, F3, F5 200 mA maximum.
•
F1 to F3 are used to limit the current available to the sensor inputs.
•
F5 is used to limit the current available to the internal electronics.
•
F6 is not used.
Model WDC4V46C -
•
F1 to F3 2 amp maximum, used to limit the current available to the sensor inputs.
•
F5 200 mA, used to limit the current available to the internal electronics.
•
F6 2 amp maximum, used to protect the AC power supply.
NOTE
Recommended cable type is Belden 5508FE with 10 conductors each 22 AWG, shielded. Overall
outer diameter is 0.23 inches. Belden 5508FE wire colors are used in all of the sensor wiring
diagrams
NOTE
To calibrate speed and utilize the Watchdog’s built-in alarm and shut-down capabilities, a motor
interlock (run) signal is required. For typical motor interlock wiring examples, review the wiring
diagrams for terminals 6 & 7 in the WDC4 manual (section 9).
