SMART TRAFFIC LIGHTS SIMULATORSMART TRAFFIC LIGHTS SIMULATOR

SMART TRAFFIC LIGHTS SIMULATORSMART TRAFFIC LIGHTS SIMULATOR .
The panel must reproduce a crossroads between two one-way streets each one controlled by traffic lights
and equipped of three pedestrian crossings with traffic lights too.
The timing of the set of lights must be not cyclically constant any longer, but it must be as a function of the traffic intensity: as a matter of fact everything shall depend on the number of vehicles present on the single streets and detected through some sensors; the distance between the latter must establish the maximum number of vehicles that can pass each time, while the pedestrian crossing shall occur only on request.
 The different traffic lights must be represented by LEDs, while for the sensors some push-buttons shall be used like for the requests of pedestrian crossing.
The presence on the street of vehicles, schematically represented, must be pointed out by LEDs whose control shall be managed by an internal electronic circuit independent from the PLC.
All the LEDs, with the exception of the ones displaying the vehicles, must be connected to the terminals of the first left block, that shall then  be connected to the outputs of the PLC; all the cathodes of the LEDs must converge to the "com".
The push-buttons, whose common shall be represented by "com", must be on the contrary connected to the terminals of the second right block, that shall  be at their turn connected by means of a cable to the PLC inputs. The closing of the "reset" push-button must restore the initial conditions.
The connectors, set in the rear part, must allow to directly connect the panel to the PLC through two 37 pin connectors placed on the back side of the trainer.
The panel must be  equipped with an internal stabilized power supply unit with the following characteristics:
Output voltage: 24V
Output current: 1A
Thermal protection
Protection against overloads
A bipolar plug with relative ground, set in the rear part of the panel, must allow the supply of the system at 220 V - 50 Hz.
The trainer must be provided with manual in English language