T51-1 System STAND ALONE MICROPROCESSORTunnel Lighting Control SystemT51-1 system is an industrial microprocessor lighting control panel. SCOPE APPLICATIONStructureUnidirectionalBidirectionalShort tunnel rampLong tunnelInside the T51-1 System NEMA 1 enclosure.(Pre-wired and tested to UL508A (CAN/CSA C22.2.0014-M91)Major ComponentsNote: Incoming power of 120 VAC, additional Transformer 480/277 VAC.Normally closed interposing relayPower distributionFusesNormally closed contactorMain controller: T51Six output channels for night and two daytime light levels.Hold-On timer, (0-160 min)Output channelAdjustable ascending input time delay (0-99 min)Adjustable descending input time delay (0-99 min) Optional programming sequenceAlternation of lights.Night/Day crossoverInput into the T51 controllerTMAS sensorTLUM sensorReceives 4-20mA signal.Adjustable deadband.Type of Tunnel light sourcesFluorescent (FL)Low Pressure Sodium (LPS)High Pressure Sodium (HPS)Metal Halide (MH)Light emitting diode (LED)