ATC-3

The ATC-1 and ATC-3 products are an evolution of the CIP-1 island protection circuits, expanding Global Rail Systems' family of audio frequency overlay (AFO) track circuits. Like their CIP-1 cousins, they apply a modulated signal to the rail that is decoded by the receiver to provide immediate shunt detection in the harshest railroad signal environments. The modulated signal, combined with fixed-impedance rail connections, allows increased receiver sensitivity to control detection distances from transmitter and receiver track wire connections. Additionally, both ATC-1 & -3 incorporate vital post processing and processor-based decoding of the receiver output to provide a vital output with immediate shunting and very high noise immunity from both false pick-up and false drop-away.

ATC products are ideally suited for grade crossing applications, with the ATC-3 allowing multiple inputs and performing all vital processing and stick logic functions. Designed to AREMA standards, their unique circuitry takes full advantage of coded and decoded rail signals, and they are a direct replacement for both vital and non-vital shunt-type island circuits.

They are packaged in a Phoenix-type enclosure providing a flexible, compact, and lightweight DIN-rail mounted configuration. Plug-coupled, spring-loaded wire terminals are used for ease of maintenance and replacement. The vital timers (LOS, stick release, and approach time out) can be user adjusted from a minimum of 6 seconds to a maximum of 1200 seconds (20 minutes).

Circuit Features

• Accommodates track circuits as short as 15 feet or as long as 4,000 feet
• Transmitter frequency is easily selected in the field
• Low power consumption is ideal for solar powered applications
• Transmitters and receivers operate independently and need not be co-located
• DIN rail mounting using Phoenix-type enclosure (compatible with Global Rail Systems' audio modules, DTMF decoder, and programmable controller)
• Spring-loaded, plug-coupled wire terminals (keyed or non-keyed) for easy service
• Post processing of output signal provides vitality to the design
  

ATC track circuit components must have surge protection. Only air-gap arrestors and equalizers having no in-series impedance are recommended. Use of other equipment will dramatically affect performance of units. Specifically, Safetran Model 90925-02 and LPC Model LPC-15010 are not compatible for use with ATC and CIP products.

Global Rail Systems Inc.
P.O. Box 110, 503 FM 147, Marlin, Texas 76661
Call toll free: 866-883-2213 --- Fax: 254-883-2201