SSCC APPLICATIONS & PROGRAMMING GUIDELINES
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4-10
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
4.4 Crossing Controller Operation
The A80405 module provides the drive for up to 20 amps of lamp current. The A80405 module
continually performs self-diagnostic tests that result in complete on-line testing of module
operation. If a critical failure is detected, the appropriate signal states are generated to
immediately flash the crossing lamps and bring down the gates.
WARNING
REMOVING INPUT POWER FROM THE A80405 MODULE CAUSES
THE GATES TO DROP BUT THE LAMPS ARE NOT ACTIVATED.
IF B OR N ARE FULLY OR PARTIALLY REMOVED, SIGNALS
AND/OR GATES MAY NOT OPERATE AS INTENDED. TAKE
ALTERNATE MEANS TO WARN VEHICULAR TRAFFIC,
PEDESTRIANS, AND EMPLOYEES.
Table 4-1 A80405 Module Operating Parameters
PARAMETER
VALUE
System Reaction Time:
Nominal 700 ms
Power-Up Time:
40 seconds maximum
Lamp Flash Rate:
Can be programmed for 30 to 70 flashes per minute in 5 flashes-per-
minute increments.
50 flashes per minute default
Lamp Duty Cycle:
50% each flashed lamp
Lamp Voltage Adjustment:
Gate lamps are programmable, with regulated set points from 9.0 to
15.0 volts in 0.1 increments
The lamp output voltage at the SSCC connector is limited to 1.5 volts
under the battery voltage.
Variable resistors on the Near Gate output of the Lighting Surge panel
are provided for voltage drop compensation as required (see Figure 4-8
and Figure 4-9).
Test Modes:
Static Lamp & Bell Tests:
Selected lamps lit steady.
All lamps flashing
Bell ON Steady
Activate Crossing:
Crossing activates according to normal operation
Timed Lamp Test:
Automatically delayed & timed.
Repeated Lamp Test:
Timed lamp test repeated after twice the initial delay.