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2. WIRING
2.1
Precautions for Cable Installation
Cable between transducer unit and transceiver unit
This cable carries very weak signals with amplitude of less than 0.1 μV which are easily
interfered by noise. Ensure the ground wiring.
Cable between transceiver unit and distribution box
These cables carry echo signals with amplitudes of greater than 0.1 mV which can be interfered
by noise from high tension power cables.
•
Cable carrying more than few kilowatts power to fluctuating loads.
•
Cable carrying switching waves generated by thyristor, etc.
•
Transmission antenna cable of radio equipment.
Other cables of DS-80
Observe the following guidelines to prevent noise, interference problem.
•
When the cables run in parallel with power cables, separate them 400 mm at minimum.
2.2 Wiring of Distribution Box
The distribution box has two sets of cable clamps, upper for cable DPYCY-1.25/TTYCYS-1
(small hole) and lower for cables TTYCY-2S (medium hole), TTYCY-3S (large hole).
Lay the cables on the clamps as below depending on the terminal board.
•
TB1: Left side
•
TB2: Center
•
TB3: Right side
Cut the cables slack to bind them at the fixing plate with a cable tie, leaving some slack for
future servicing and checking.
All cables except the power cable should be fixed by the clamp with the armor.
Entrance Clamp
23
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