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MODEL EMTC -04  MODEL EMTC -05  MODEL EMTC -06  PEDESTRIAN PUSH BUTTON PANE ACTUATED CONTROLLER ( vehicular / pedestrian ) . with I/ p channels MODEL - EMTC 06    GENERAL 1.1 These Traffic Controllers have been designed to confirm to Indian Standard specification IS : 7537 – 1974 and British Standard Specification No. BS : 505 – 71 wherever applicable and standard international practices. 1.2 The Controller is fully Solid State and has no moving parts. The controller employs fully Micro controller based Circuitry on double side glass epoxy PCBs which have green masking to counter, tracking problem and is modular in design, having plug in system for easy maintenance and operations. System design is such that it takes care of conflicting lights on opposite roads and optically isolated outputs .    CAPABILITY OF THE CONTROLLER 2.1 The basic controller is capable of being operated in any of the following modes :- 2.1.1 FIXED TIME MODE As an independent fixed time independent controller :- Model Emtc 06 is fully flexible and can be edited or programmed at site with help of hand held terminal or Labtop / pC – It works as Independent isolated Multiplan controller can be programmed for any day plan / duration or timings of Peek / Off peek – Night flashing 2.1.2 DEMAND DEPENDENT MANUAL MODE :- At any time of requirement controller can be switched to - MANUAL OPERATION It will be possible to bring the controller under manual control by operation of auto manual switch in police box. The operation of the switch would result in transfer control over the duration of each stage from the electronic timing unit of the controller through a push button only manual control switch. The sequence of stages preset on the electronic unit will remain undisturbed. Each time of push button is pressed, the current stage will changeover to the next stage in the controller. 2.1.3 There are further 2 modes in Manual operation • Sequential manual operation :- in this mode the signal operates in the same current pattern and Green signal timings run by the manual Push button – with reference to the minimum green time pre set . • Right of the way DEMAND :- This mode is operational from Hand Held terminal or Police panel ( as per requirments ) – In this mode when the demand is requested for Right of the way for traffic on a phase which has no right of the way at the time request is made – will change the sequence and give the way and will wait for next demand is Recorded . This works on First come first Served basis irrespective of the sequence and in case there is no Demand from any other phase will remain open the current phase for indefinite time 2.2 The main frame of the controller will have facilities for extending the capability of the controller for any of the following additional modes of working by addition of suitable modules at any stage. 2.2.1 As independent centrally operated from control room with GSM / PSTN modem . – (optional ) . Data of intersection controller can be edited – send / receive from any remote station – with help of MODEM attachment to controller can communicate with remote station all the features including programming can be changed . 2.2.2 As part synchronized green wave system with neighboring intersection . ( cable linking or cables ) to the maximum of 10 Intersection in one Corridor - System can work as green wave synchronized corridor vehicle moving in one direction at a pre defined speed will get Green signal Through out the corridor – The intersections in the corridor is limited to 10 Numbers and can be linked through cable for more effective synchronization 2.2.3 Vehicle / pedestrian actuated mode , with optically isolated input channels . with comm. Port for reverse count down timer . (RS 232 + RS 422 / RS 485 ) . There are further 2 different modes in Vehicle actuation ( Demand ). i) Sequential VA mode – In this minimum and maximum time for each phase is programmed and The sequence is forwarded in the predefined sequence for Minimum time to all the phases which are programmed irrespective of any Actuation ( Demand ) from that phase has been requested or not and stay till maximum time pre defined . ii) Right of The way – VA ( demand ) – In this mode signal remains open for the Phase from where the demand is requested for Minimum time and stay open till any demand from other phase is recorded . This works on First come first Served basis irrespective of the sequence and in case there is no Demand from any other phase current phase will remain open for indefinite time – In case there is demand from all phases like in peek Hours then the respective phases will remain open till Maximum time allotted to that phase .    CAPACITY 3.1.0 The basic controller is designed to provide for control of vehicular and Pedestrian traffic having control of 16 phases maximum & each phases have 3 outputs ( 1 red , 1 amber , 1 green ) i.e 48 outputs, as per requirement. The Controller will be capable of providing any required o/p signal sequence. And 16 Input sensing chanel which can be used as Pedestrian actuated or vehicle actuated or BOTH. 3.1.1. The controller will have 24 cycle plans (including one for night flashing). And can select multiple day plans including Actuated mode , peek hours timing , off peak hours , any scheme as and when required in the day Plan . 3.1.2. It will be possible to buildup a 24 hours day plan from the combination of Cycle plans such that a particular cycle plan is in operation during any Desired period of the day. It will be possible to provide max 24 cycle plans in a period in a day . •  With the help of Hand held Terminal & display unit or through pc windows based software , system can be programmed or edited at site by operator / police man even without knowledge or training of electronics or software programming. •  Controller can be programmed for weekdays of the month and holidays ( any special day of the year .) and Multiple day plans for Routine •  Controller can be upgraded to SMS FEATURE & 2 WAY COMMUNICATION USING GSM MODEM FOR DATA RETRIEVING / TRANSMITTING AND CAN SEND SMS MESSAGES OF DIFFERENT FAULTS & ALSO CONFIRMATION ON RECTIFICATION. SELF DIAGNOSTIC TYPE : typical faults . •  Conflicting signal •  Time errors •  Memory checksum error •  Power supply fault And other as required by user . CONFLICT MONITOR UNIT :- (OPTIONAL) Green Signal Conflict Monitor is electronic equipment which enables the signal controller to turn on blinking mode during conflict condition for Different Green Phase Working Principle :- Output of Each green signal of every Phase is connected with the conflict monitoring unit. The conflict monitor monitors the output of green signals, which is running at the moment. Due to any reason if the other unwanted green signal o/p is recorded the equipment senses it raises alarm indication + forced blinking signal to the TCU (Traffic Control Unit) to switch on to the Blinking mode and also Cuts the supply to GREEN & RED PHASE outputs. Features : - •  When green signal conflict condition takes place, phase supply for green & red solid states get disconnected. •  Phase supply amber solid states is going directly where as phase for green & red solid States are going via conflict monitoring units •  In case of conflict conditions, Amber Flahser Buzzer is on - to Reset the system Trip down the main supply through MCB & again switch on the same.     BASIC CONTROLLER FEATURES 4.1. The operation of all signals will be positive without dark intervals or flickering lights. The signal light switching wiring is interlocked to prevent simultaneous display of conflicting green signals. Cyclic Operation A control scheme in which the stages are given in a fixed order. Demand A request for right of way for traffic on a phase which has no right of way when the request is made Early Cut-off A condition in which one or more traffic streams are permitted to move after the stoppage Of one or more of the traffic streams which during the preceding stage have been permitted to run with them. Inter-Green Period The period of time between the termination of the green signals for one phase and the beginning of the green signal for the next phase to receive right of way. Maximum (or Fixed ) Green Period The time that a green signal can continue after a demand has been made by traffic on another phase. Phase The sequence of conditions applied to one or more streams of traffic which during the cycle, receive identical signal light indications Signal Plan (or timing OR Program ) The sequence of stages and their duration and the mode of operation that governs the operating of a controller at a selected time. In linked systems, the plan also defines the offsets. Stage A condition of the signal lights which permits a particular movement of traffic. 4.2. The controller will have facility to set each stage time for any duration from 1 to 199 seconds. ( can switch On / Off / Blink any output ) 4.3. The change from one cycle plan to the next cycle plan will occur at the end of a cycle and not halfway through a cycle. Similarly the first cycle of the new plan will start with stage one and not midway through a cycle.- in fixed time / Multiple day plan Mode 4.4. In any day plan, it will be possible to repeat the same cycle setting for multiple cycle plans.    INDICATIONS & CONTROL The traffic control unit will incorporate the following Controls : 5.1. ON / OFF Switch. 5.2. Control circuit fuse. 5.3. Control Circuit Supply Indicator. 5.4. LAMP TEST SWITCH 5.5. Stage Indicators. 5.6 . LCD DISPLAY 2 LINE 16 DIGIT WITH BACK LIGHT 5.7. HAND HELD TERMINAL / KEY BOARD OPTIONAL 5.8. AUTO / MANUAL SWITCH. 5.9. Police man control box 5.10 Flash MODE switch.    FLASHING SIGNAL The controller will be equipped with a reliable electronic flashing unit that would flash Amber signals in the following conditions: a) When the day plan provides for it. b) When fault monitor alarm has detected a fault in the signaling system. c) When switched to this mode by manual control. d) CONFLICT MONITORING UNIT SEND COMMAND The flashing unit will confirm to the following specifications: - 6.1. A solid state blinker will be provided for flashing Amber signal lights. 6.2. The flashing rate will be within the range of 30 flashes per minute when this applied voltage varies in the range between +15% and –20% of its nominal values 4% of its nominal frequency over an ambient temperature range of 0 to 55c.    HARDWARE 1. CPU : Micro controller 89C series (Atmel / Philips) 2. Memory :. EEprom. 3. Clock : Built in RTC with 10 years battery backup 4. Protection : : Auto Shut down on fluctuation beyond limits and Auto Start up on restoration . 5. Output switching : Through solid state devices with zero cross over & optically isolated . 6. Input / Output isolation : Output switching isolated from control circuit by optical isolation. 7. Police Control Panel : Output OFF, Auto / Manual Step & Flash , Lamp Test 8. Programming Facility : i. PC Compatible by RS 232 / 422 communication. •  Built in Keyboard & LCD display. •  Comm . port for count down timer 4 ports RS 422 one for each road cdt. •  RS 485 port for cable linking sync for comm. With neighboring signals •  RS 232 serial comm. Port for PSTN / GSM modem attachment .    PROGRAM SCHUDULE Sr.No. Parameter Min. Max a  b    c    d    e    f    g    h    i      j Minimum Green Minimum Green Per Group Amber Time Amber Time Per Group Pedestrian Flash Time Start Up All Red Time Start Up Flash Time Cycle Time Cycle Time Per Plan Cycle Monitoring Time PRG . PRG 01 Sec. 01 Sec. 01 Sec. 01 sec 01 Sec. 01 Sec 01 Sec. 01 Sec. 199 Sec 299 Sec. 199 Sec. 299 Sec. 20 Sec. C.T. C.T.. 299 Sec. 299 Sec. 299 Sec.      MODES OF OPERATION 1. CABLESS LINKING MODE 2. CABLED LINKING MODE . 3. FIXED TIME 4. MANUAL OPERATION 5. VEHICLE ACTUATED 6. FLASH MODE With windows based software for easy programming for fixed time , multiple time & actuated mode with preview option , retrieving data from controller , 2 way communication .     VEHICLE ACTUATED MODE GENERAL In Vehicular actuated mode, systems operated the Traffic lights by detecting the movement of the arriving vehicles in the controlled zone. Detector loops are installed below the ground at suitable points for sensing the arrival of vehicles. The loop is connected to and Electronic vehicle detector. This is a very precise and discriminatory device with adjustable sensitivity and gives an input signal to the controller every time a vehicle passes over the sensor. The controller operates the Traffic lights as per a pre-scheduled flexible program. Each Road Exit movement is associated with a minimum Green and Maximum Green Time, which is programmed into the memory of the controller as per requirement. The minimum time is the time for which the Road will get green signal once the right of the way is awarded. The time is extended automatically when more vehicles are detected for passage in the same direction. The green time is terminated (the maximum green time) if there is demand from other directions. SUITABILITY as 4-phase 8 detector controller suitable for a 4 arm Intersection and discriminating between the straight going traffic and the tuning traffic. The controller automatically schedules the timings on the basis of information provided by the Vehicle sensors and the program fed into the MCU. This system is particularly suitable for Intersections where there is no fixed or uniform or regular pattern of traffic movement and the traffic density. The controller adjusts the timings of the traffic phases on the basis of actual requirement as computed by the data fed by the detectors. EQUIPEMNT The essential equipment for the system will comprise following items. RED, AMBER and GREEN traffic lights signal as per the layout plan and requirement for each intersection. Signal posts for the Traffic Signal Lights Vehicle detectors as per the layout plan. Vehicle Detector Unit .( Loop detector card Unit ) Cable and other installation material as required. EXPLANATION OF THE TIMINGS VEHICULAR MODE OPERATION  min is the Minimum Green time for which the signal is made green to allow the vehicle to enter into the Intersection. It should be equal to clear at least five vehicles, which may be waiting between the signal Stop line and the Detection loop. in the controlled lane  max is the maximum green time. In case there are vehicles waiting at some other road lane, the Total Green time including the extensions is limited to this Time.  All the timings are programmable at site and also through the Pc (RS 232 serial comm..)  There is a special comm.. Port RS 422 (4 ports) are provided for count down timer attached on each road and will display the time remaining in each cycle and will also indicate the changes as and when demand is send by CPU. System is very flexible and can be programmed for fixed time / Actuated mode as required in The day plan- all the Outputs of controller can be programmed and setting of scheme can be done with help of windows based software. As stated above, is possible to re-programmed the timings at site and the procedure for the same is given in next section,      GENERAL OPERATING SCHEDULE FOR 4 Phase 8 LOOP DETECTORS Let us call the 4 Phases s as S1, S2,S3 and s4. When initiated the system will operate as under : - S. NO. STATUS / field conditions Signal 1 Signal 2 Signal 3 Signal 4 EXPLANATION   First detection recorded from say S1s (Signal-1 Straight) Green RED RED RED This status will remain for a, minimum green period set for this road.   No other detection recorded         Status to continue   More vehicles detected at S1         Green time is extended by a step as pre defined every time a vehicle is detected on the same loop before expiry of time. The extension is subject to a maximum total green time (Preset when there are vehicles waiting else where   Demand recorded from say detector S2. Amber then Red Red Red followed by Green Red Change process will start after expiry of extended time or maximum time which ever is earlier The demand from detectors is actuated & computed for the particular green phase at that particular scheme and the signal change is initiated on the conditions of Minimum – max green, and then change to next phase.

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