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Railway Signaling Systems
Electronic Terminals
Electronic terminal section
Lineup of electronic terminals for on-site equipment
In 1989, Japan’s first six types of electronic terminals—PM, DC, SG, AC, TR and MMIF—were developed with an 8-bit CPU, single system configuration and machinery room-centered and on-site dispersion specifications. The double-system version was then developed and the equipment room relay control terminal and built-in-equipment terminal have been added to the lineup.
  Functions Object of control Rated specifications
Signal terminal Multiple-light colored railway traffic signals are controlled by instructions from the electronic interlocking unit. Also, warning data on breakage and semi-breakage of the core lines of railway traffic signals are output as monitored data. On-site
Departure signals
Four sets of four-indicator and two sets of five-indicator systems are used
AC terminal One- or two-light and serial-light train traffic lights are controlled from the electronic interlocking devices. Warning on breakage of signal lamp core lines is output as monitored data. Turning on of signals and signs, indication of routes, etc. Eight sets of one- and two-light signals and two sets of three- and four-light signals are used.
LED terminal All single-light, multiple-light and serial-light LED railway traffic signals are controlled from the electronic interlocking device. Warning on breakage of LED core lines is output as monitored data. On-site, departure, shunt and all other LED signals With combinations of one to 16 lights
Railway track terminal This electronic railway track relay detects railway lines with trains by connecting with the railway track circuit via the transmission filter. It functions at the equivalent of eight conventional railway track relay units. Railway track circuit Eight-railway track circuit
 Point machine terminal Switching and locking of point machines are controlled from the electronic interlocking device. Defects in opening indications (KR) and locking of point machines are input and output as monitored data on the electronic interlocking device. Point machine Eight sets of one to four switchovers
DC terminal ATS relay machines at sites located remotely from the equipment room and relay machines of sub-equipment rooms are controlled directly from the electronic interlocking device. Connecting point conditions from remote on-site devices are taken into the electronic interlocking device. Multiple-route indicator, ground element of ATS-S, DC relay, railroad crossing Relay output at 16 points
Contacting point input at 16 points
PIO terminal Drives the relaying devices installed in equipment rooms, and takes in the contacting point conditions. A parallel interface is established without a contacting point with other devices in the equipment room. Input and output of DC relay in equipment room  
 General-purpose terminal
(NFS version)
Controls the LED indication lamps on the control panel and takes in the contacting point conditions of push buttons, levers, etc. Indicator output on the control panel    Input data on push buttons, levers, etc. Indicator output at 64 points    Contacting point input at 32 points
Road map of electronic terminals
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