STC SmartScanIS, User Manual

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EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
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2.2 Transducers
Transducers are rail-mounted devices that provide the timing signals that allow the system to:

Detect a train's presence

Coordinate gating

Determine a train's direction

Calculate a train's arrival and exit speeds

Calculate a train's length

Identify individual railcars and locomotives based on axle spacing patterns
Two mounting plates are packaged with each transducer. The smaller one, which is labeled
112LB-130LB , is used with lighter rails. The larger one, which is labeled 131LB-141LB , is
used with heavier rails.
If your rail size were 112 to 130 pounds per yard (55.6 to 64.5 kilograms per meter), you would
use the smaller mounting plate (2100-554) that looks like this.
If your rail size were 131 to 141 pounds per yard (65.0 to 69.9 kilograms per meter), you would
use the larger mounting plate (2100-552) that looks like this.
112LB-130LB
131LB-141LB