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SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
EGOM
Exit Gate Operating Mode – A dynamic mode in which the exit gate operation
is based on the presence and detection of vehicles between the stop bar or
entrance gate and the exit gate.
Entrance Gate:
A gate used at the entrance to a highway-railroad grade crossing, which is
designed to release and lower by gravity from the full vertical position to the
horizontal position under a loss of power condition or when the control energy
(GC) is removed.
Exit Gate:
A gate used at the exit from a highway-railroad grade crossing with Four
Quadrant Gates to restrict wrong direction vehicular movements, which is
designed to raise by gravity from the horizontal position to a vertical position
great enough to allow vehicle clearing under a loss of power condition or when
the control energy (GC) is removed.
FAR GATE:
On the same surge panel, the ‘far gate’ is the flashing light signal or gate with
the largest voltage drop in the cable circuit. In general, if both signals have the
same number and type of lamps and the same size cable conductors, the ‘far
gate’ is the location with the longest cable run. The ‘far gate’ circuit on the
surge panel does not have an adjustable resistor in series with L1 and L2 that
provides voltage adjustment.
Field Password
The password set that allows field maintenance personnel access to field
editable parameters.
Flash Memory
A type of non-volatile memory that can be reprogrammed in-circuit via
software.
FLASH SYNC:
The two-wire circuit that synchronizes the alternating flash of an external
crossing controller with the internal crossing controller, SSCC IIIi, or the
external crossing controller, SSCC IV.
Gate Delay Period
The programmable time period from when the lights begin to flash until the
gates begin to descend.
GC:
Gate Control
GCE
Grade Crossing for Electrified Territory – A track occupancy detection system
suitable for electrified territory, based upon the GCP5000, that supplies track
occupancy information for crossing warning devices and other train or vehicle
detection systems.
GCP:
Grade Crossing Predictor
– A train detection device used as part of a
highway-railroad grade crossing warning system to provide a relatively
uniform warning time.
GD:
Gate Down
, input energized when gate arm is horizontal.
GFT:
Ground Fault Tester (GFT-II)
– An optional external device connected to
the Echelon LAN that constantly monitors up to two batteries for
ground faults and indicates battery status to the SEAR IIi.
GP:
Gate Position
– Input energized when the gate is vertical.
GU:
Gate Up
– Used in a user-defined SEAR IIi application program, (the
same as GP).