STC SmartScanIS, Руководство пользователя

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EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
137
8.6 Advance Transducers
All tracks have either two advance transducers or one track circuit. If your site uses track
circuits, skip the instructions below and go to
8.7 Dragging-Equipment Detector .
When used, there are two advance transducers per track, each having two wires. One black
wire and one white wire. At a single-track site, the cables from the advance transducers
should be labeled
ADV1 and ADV2 .
At a double-track site, they're labeled ADV1-TRACK1 , ADV2-TRACK1 , ADV1-TRACK2 , or
ADV2-TRACK2 , whichever is appropriate. At double-track sites, the cables from the advance
transducers on track1 are connected inside the leftmost SmartScanIS enclosure. The cables
from track2 are connected inside the rightmost SmartScanIS enclosure.
On the Surge Protection Subassembly (in the SmartScanIS enclosure), there is one UTB
assigned to both advance transducers. This UTB protects the SmartScanIS from transients
and surges, which can be induced onto external wiring by lightning. This UTB, which is
labeled
Advance , has four rows of connectors. The wires from both advance transducers are
terminated at the third row of connectors from the top. The second row from the top is wired at
the factory to terminal block
TB1 on the System Interface board.
Observe correct polarity when you connect the wires from the transducers. The polarity is
correct when the transducers' white wires are connected directly below the existing white wire
at row two of the UTB, and the transducers' black wires are connected directly below the
existing black wire at row two of the UTB.
White Wires from both Advance Transducers Black Wires from both Advance Transducers
White Wire from System Interface Board
Black Wire from System Interface Board
White Wires from both Advance Transducers Black Wires from both Advance Transducers
White Wire from System Interface Board
Black Wire from System Interface Board