STC SmartScanIS, Руководство пользователя

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EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
135
8.5 Gating Transducers
There are two gating transducers per track, each having two wires. One black wire and one
white wire. At a single-track site, the cable from gating transducer TO1 should be labeled
TO1 . The cable from gating transducer TO2 should be labeled TO2 .
At a double-track site, they're labeled TO1-TRACK1 , TO2-TRACK1 , TO1-TRACK2 , or
TO2-TRACK2 , whichever is appropriate. At double-track sites, the cables from the gating
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
(universal transient barrier) assigned to transducer TO1 and another to transducer TO2.
These UTBs protect the SmartScanIS from transients and surges, which can be induced onto
external wiring by lightning. Each UTB has four rows of connectors. The wires from one
gating transducer 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.
Universal Transient Barriers Universal Transient Barriers
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