Global Rail Systems Model CWL-7 and 7G

Global Rail Systems cost effective Crossing Warning system is designed as a low power consumption system for Solar or AC applications. The Model CWL-7 provides vital approach and train occupancy indications for crossings where flashing lights and a bell is all that is required. Model CWL-7G is a gated system. The detection circuits allow for positive detection even in rusty rail applications without additional equipment.

The system is a three (3) section design for approach detection from either direction with an island circuit at the crossing with stick release timer for added efficiencies. The system utilizes innovative technology and design to allow easier installations and reduced costs.

Global Rail Systems SI Audio Track Circuit model ATC-2 consists of independent transmitter (ATC-2T) and receiver (ATC-2R) modules. These modules operate independent of each other and may or may not be co-located in the same equipment housing. Both are designed for easy DIN-Rail mounting with quick disconnect screw-type terminals for all interconnections. The ATC-2T Transmitter module (fig. 1) is field-selectable for one of two different standard frequencies and rates.

The ATC-2R Receiver vitally decodes the modulated signal from the ATC-2T as well as provides a 6-second loss-of-shunt, directional stick logic and control logic for the output (XR or flasher control).

The ATC-2 Track Circuit provides an audio overlay type of track circuit that vitally provides immediate shunt detection combined with a delayed pick-up circuitry that takes full advantage of coded and decoded rail signals. The ATC-2 design applies high-noise filtering and interference mitigation techniques not found in other track circuits.

The track circuit characteristics of the ATC-2 allow for track circuits as short as 15 feet, or as long as 3,500 feet.

Features:

• Dual processor vital design (distributed redundant processing)
• No wiring across roadway required
• Stick logic design similar to Electro Code 4 in concept.
• Logic includes stick release timer function

Operation:

1. All island occupancy keeps both flashers operating.
2. Approach circuit occupancy causes code rate change in island circuit transmitters to begin flasher operation.
3. Island circuit occupancy sets directional stick (either mod rate).
4. Two-circuit directional stick logic releases flashers on trailing occupancy.
5. Stick circuit releases on track circuit vacancies, or timeout by stick release timer.

ATC-2 Typical Application (ATC-1R Frequency must be specified by order; ATC-1R is NOT field frequency selectable.

General Application Guidelines

This sheet contains general application guidelines. As with all track circuits, track circuit operation can vary depending on track ballast, wire length, shunt sensitivity, over-ring, under-ring, transmitter setting, receiver adjustment and supply voltage. The CIP-1 Track Circuits provide a wide range of adjustment for almost any application. Care needs to be observed when adjusting.

Physical Specifications

Supply Voltage: 9.2 VDC Minimum, 16.2 VDC
Maximum Supply Current: CIP-1T 150 mA, ATC-1R 180 mA
Output ATC-1R Relay Drive: Equal to supply voltage at 500-ohm load
(ATC-1R Relay drive includes a test strobe when active)
Dimensions - Width: 1.8” (CIP-1T) 2.7” (ATC-1R) Height: 4.25”, Depth: 4.4”

If only they had used a Global Rail CWL-7G!

Global Rail Systems Keeps You Moving Safely

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