Fairbanks VSX SERIES TRUCK SCALE - Manual (Page 32)

Section 3: Wiring
04/12 32 51173 Rev. 8
WIRING THE POWER SUPPLY, CONTINUED
2. Wire the Pit Power Supply ( PPS) to the Instrument.
 Run the ‘Home-Run’ cable from the PPS, TB1 to the Instrument’s TB1, wire as
follows:
TB1 PPS TB1 Inst 17246 Cable Description
1 1 Black 28 volts, AC
2 2 Green AC Return
3 3 Blue 20 Volts, DC
4 4 Orange Enable
6 6 Shield Shield/DC Return
7 7 White Transmit
8 8 Red Receive
Note: Shields are used for DC Return and MUST be connected.
GROUNDING THE SCALE
For accurate operation and protection against damage from lightning strikes, all of
the components of the system must be properly grounded. The grounding system
contains ground rods for the scale location. Below are points to correctly ground the
system.
It is recommended that the grounding be done with #8 or larger wire or braided
ground straps.
All of the ground connections should be 2 feet or as short as possible.
The case of the SSCs and PPSs must be attached in a clean electrical connection to
the platform frame.
 The platform frame is then connected to a scale ground rod.
The insulated WHITE wire from the PPS connects directly to the separate ground
rod (not to the same rod as the weighbridge steel).