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14 January 2021, SmartScanIS User’s Guide for Union Pacific, EUD-2016026-00 Rev.2
4.6.4.6 Scanner Connectors
Mounted on the left side of the Scanner Interface board are four Amphenol connectors
(97 series box receptacles). The top two, which are labeled S1 and S2, are for the bearing
scanner cables. The bottom two, which are labeled S3 and S4, are for the wheel scanner
cables.
Connectors S1 through S4 on Scanner Interface board each have the same printout. The
table below shows this pinout.
Pin A
Ground
Pin B
Shield
Pin C
120 VAC (line voltage) that activates the scanner heaters. Fused at 4 amps.
Pin D
Neutral for heaters.
Pin E
Not Used
Pin F
+24 VDC (battery voltage) that activates the scanner shutter.
Pin G
Ground return for shutter solenoid.
Pin H
Heat signal from the scanner.
Pin I
Ground return for heat signal from the scanner.
Pin J
Scanner pyrometer power. Reg12 VDC fused at 100mA with a
self-restoring fuse.
Connector S1
A
H
B
G
Connector S2
Connector S3
Connector S4
Bearing Scanner on Rail1
J
Bearing Scanner on Rail2
Wheel Scanner on Rail1
Wheel Scanner on Rail2
Summary of Contents for SmartScanIS
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