SSCC APPLICATIONS & PROGRAMMING GUIDELINES
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4-2
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
The SSCC IIIi modules are integrated into the GCP5000 (GCE) system (wiring between the
GCP, the SSCC IIIi, and the SEAR IIi is eliminated) and are not redundant.
4.2
Unit Overview
The A80405 module is programmed, calibrated, and tested from the Display module of the
GCE. It is activated by internal logic from the GCE MCF, and monitors gate position inputs from
the crossing gate mechanism as well as provides activation for the bell, lamps, and gates of a
crossing warning system.
4.2.1 Module Function Control
The following A80405 module functions may be programmed:
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Lamp flash rate
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Gate control delay
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Low battery threshold indication
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Control maintenance call output
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Test timer intervals
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Crossing and lamp tests
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Lamp flashing synchronization between the A80405 modules of multiple GCP5000s
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Disabling of crossing bells while the gates are rising
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Disabling of crossing bells while the gates are down
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Requires gate down inputs to be energized
4.2.2 Crossing Controller Features
The circuits of the A80405 incorporate heavy-duty solid-state switches and have regulated lamp
voltage. It is user-programmable. It minimizes lamp voltage dropping below acceptable limits
when the AC power is interrupted for short periods and eliminates seasonal adjustment of lamp
voltages when using temperature compensated battery chargers. The Crossing Controller Lamp
Voltage uses pulse width modulation regulation, with the pulsed output frequency is
approximately 500 Hz. The peak voltage of the pulse is approximately 1 volt below the battery
input voltage. Depending on the voltage input, the pulse width is automatically varied to give a
regulated output. The following examples in Figure 4-2 assume the desired output is 10 volts:
Example 1: 16 volts in, the pulse is 15 volts and on 66% of the cycle.
Example 2: 13 volts in, the pulse is 12 volts and on 83% of the cycle.