Apex Rail Manufactures full assortment of industrial crossing warnings including fully automated solutions, remote controlled DTMF, and more.
Fully Automated Crossing
Remote DTMF Radio Controlled Crossing Warning System
By adding Remote Radio Control DTMF activation to a fully automated crossing you would provide train crews the ability to request the activation of the crossing prior to occupying any of the circuits. Adding DTMF to a fully automated crossing would not be a safety concern because the crossing would still operate as described above if the train crew were to forget to DTMF the crossing.
In a remote DTMF activated crossing warning system the crossing is activated by a DTMF radio code as the train approaches the crossing. Because the train crews are responsible for activating the crossing no approach track circuits are provided with the system. In remote activated crossing the train crew is responsible putting the gates in the down position. The approach to the crossing is replaced with remote DTMF radio control.
DTMF Stands for Dual Tone Multiple Frequencies. DTMF are the tones you hear when you dial a telephone. A code is programed in the DTMF decoder and the DTMF Decode listens for the specific programed code. Once the correct DTMF code is received and decoded an output will be provided. This output is then used as an input into the system for a specific command. In the case of a DTMF activated crossing this DTMF output would be used as an input to activate the crossing.
In this type of setup, we employ three sets of track circuits. The two approach circuits consist of one ATC-1T Transmitter and one ATC-1R Receiver for detection of occupancy. The Island Circuit in this system consists of one ATC-1T transmitter and one ATC-3R Receiver.
The ATC-3R operates much like the ATC-1R receivers, but it also has the ability to take occupancy inputs from both of the approach receivers. The ATC-3R is also equipped with stick logic to determine where the train is as it moves across the detection area. The ATC-3R takes information it is given by the other ATC-1R receiver along with its own occupancy information and will produce a vital output based on occupancy information to activate and deactivate the crossing.