glossary:glossary_t
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| glossary:glossary_t [2014/11/20 02:48] – [Train detection] Link to Toti dpharris | glossary:glossary_t [2017/10/20 09:28] – [TVS] Bob Vetterlein | ||
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| A means of generating a signal when a train or item of rolling stock is present. Quite commonly accomplished by means of a track circuit and ToTI, FTC or DTC module which detects an object for the whole of its traverse through a track section but also possible using spot detectors such as infra-red devices (see MERG Hector kit 72), Hall effect switches (see MERG kits 101, 102 and 103) and magnetically-operated reed switches (see MERG kits 97 and 104 - 109). [[glossary: | A means of generating a signal when a train or item of rolling stock is present. Quite commonly accomplished by means of a track circuit and ToTI, FTC or DTC module which detects an object for the whole of its traverse through a track section but also possible using spot detectors such as infra-red devices (see MERG Hector kit 72), Hall effect switches (see MERG kits 101, 102 and 103) and magnetically-operated reed switches (see MERG kits 97 and 104 - 109). [[glossary: | ||
| + | ===== TriState ===== | ||
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| + | tri-state or three-state logic allows an output port to assume a high impedance state in addition to the 0 and 1 logic levels, effectively removing the output from the circuit. | ||
| ===== Transducer ===== | ===== Transducer ===== | ||
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| A collective term that refers to the device that switches turnouts by means of a mechanical linkage, so that trains can be diverted from one track to another. A common example is the twin solenoid arrangement that, when pulsed with an electric current, cause the turnout throwbar to switch from one side of the track to the other. Actuators can also consist of high torque motors or [[glossary_s# | A collective term that refers to the device that switches turnouts by means of a mechanical linkage, so that trains can be diverted from one track to another. A common example is the twin solenoid arrangement that, when pulsed with an electric current, cause the turnout throwbar to switch from one side of the track to the other. Actuators can also consist of high torque motors or [[glossary_s# | ||
| + | ===== TVS ===== | ||
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| + | [[https:// | ||
| ===== Twinkling ===== | ===== Twinkling ===== | ||
glossary/glossary_t.txt · Last modified: 2021/08/08 06:26 by Wayne