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Prototypical control of grade crossing signals (common anode/positive LED or bulbs) and gates
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An eastbound (left to right) train will cause the signals to begin flashing when WF is covered. Approximately 4 seconds later the
gate motor output will turn on and the gates will move down (if present). The signals will continue to flash even if it uncovers photocell WF as long as the
train reaches photocell WN within 35 seconds. Assuming the train does this and then subsequently covers photocell EN the signals will continue flashing. Approximately 2 seconds after the last card of the train uncovers photocell EN the gate motor output will shut off and approximately 3 seconds later the signals will stop flashing. If
the train had not covered photocell WN within 35 seconds of uncovering photocell WF then the GCP will assume the train has reversed. This “timeout”
will cause the gate motor output to shut off and the signals will stop flashing (~3 seconds after gate motor shut off). Similar behavior exists for a westbound
train with respect to photocells EF, EN and WN (shut off occurs after the last car uncovers photocell WN).
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"TrueLamp" feature gives realistic flashing lamp persistence; the lamps
(common anode/positive LED or bulbs) appear to fade out rather than simply turn on and off
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Uses 4 photocells (included) for proper bi-directional behavior; each
photocell has its own sensitivity adjustment and the GCP provides a setup mode
for making the adjustment process easier
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Adjustable gate motor speed
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Cascade multiple GCP units for multi-track crossing arrangements. NOTE: Although it may be tempting to simply add additional photocells to handle a multi-track crossing, this will not yield correct behavior! The GCP would not be able to properly sense the direction of travel on different tracks!
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Can also be triggered by other electronic circuits; trigger output can also be used to turn on a
bell circuit (see below)
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The GCP instructions cover the use of infrared emitters and detectors in place of photocells. It is also possible to use current-sensing detectors rather than photocells; you can download an application note
from our Documents section.
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Works with all scales; signals and gates not included (use with
products made by Tomar,
Oregon Rail Supply, Walthers, NJ International, etc)
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Powered from AC or DC (7-16V); current draw is ~90mA with dual LED
signals
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Solid State Design (1 year limited warranty)
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$42.95 MSRP
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