STC Smartscan NG2, Manual

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May 2021, SmartScanNG² User's Guide for Wayside Enclosure Components, EUD-2018086-00 Rev.3
9.9.2 Advance Transducers
Not all systems use advance transducers. If yours doesn’t, skip ahead to the next section.
There are two advance transducers per track, each having two wires: one black wire and one
white wire. At a single-track site, the wires should be labeled
ADV1 and ADV2 . At a double-
track site, they should be labeled ADV1-TRACK1 , ADV2-TRACK1 , ADV1-TRACK2 , or
ADV2-TRACK2 , whichever is appropriate. At double-track sites, the wires from the advance
transducers on track1 connect inside the leftmost SmartScanNG² enclosure. The wires from
track2 connect inside the rightmost SmartScanNG² enclosure.
On each surge-suppression panel, there is one UTB assigned to transducer ADV1 and
another to transducer ADV2 . These UTBs protect the SmartScanNG² system from transients
and surges, which can be induced onto external wiring by lightning. Each UTB has two rows
of connectors. The wires from one advance transducer terminate to the bottom row of
connectors. The top row of connectors is prewired at the factory to TS3 on the System-
Interconnect board.
Observe correct polarity when you connect the wires from the transducers. The polarity is
correct when the transducer's white wire is connected directly below the existing white wire at
the top of the UTB, and the transducer's black wire is connected directly below the existing
black wire at the top of the UTB. Connect
ADV1 first and ADV2 second. ADV1 is the
advance transducer to the right of the gating transducer TO2 . ADV2 is the one to the left of
gating transducer TO1 .
9.9.3 Dragging-Equipment Detector
Most, but not all, systems use dragging-equipment detectors. If your site doesn't use them,
skip ahead to the next section.
When used, there is one dragging-equipment detector per track, each having two wires —
usually, one black wire and one white wire. The color of your wires may be different.
At double-track sites, the wires from the dragging-equipment detector on track1 connect inside
the leftmost SmartScanNG² enclosure. The wires from track2 connect inside the rightmost
SmartScanNG² enclosure.
White Wire from Advance Transducer Black Wire from Advance Transducer
White Wire from System -Interconnect Board
Black Wire from System -Interconnect Board
White Wire from Advance Transducer Black Wire from Advance Transducer
White Wire from System -Interconnect Board
Black Wire from System -Interconnect Board
Shield from Cable
If no GND connection on UTB,
connect shield to Chassis GND.