T41-1 System


Tunnel Lighting Control System T51-1 system is an industrial microprocessor lighting control panel.
  • Unidirectional
  • Bidirectional
  • Unidirectional ramp
  • Bidirectional underpass
Inside the T41-1 System NEMA 3R, 4X or 12 enclosure depending on the location.
(Pre-wired and tested to UL508A (CAN/CSA C22.2.0014-M91)

Major Components

Note:  Incoming power of 120 VAC.  Other source of power can be converted down by the use of transformer inside the T41-1 system.

  • Normally closed interposing relay
  • Power distribution
  • Fuses
  • Main controller: T41
    Four output channels for night and two daytime light levels.
    Hold-On timer, (0-160 min)
Output channel
  • Adjustable ascending input time delay (0-99 min)
  • Adjustable descending input time delay (0-99 min)
 Optional programming sequence
  • Alternation of lights.
  • Night/Day crossover
Input into the T41 controller
  • TMAS sensor
  • TLUM sensor
  • Receives 4-20mA signal.
  • Adjustable deadband.
Type of Tunnel light sources
  • Fluorescent (FL)
  • Low Pressure Sodium (LPS)
  • High Pressure Sodium (HPS)
  • Metal Halide (MH)
  • Light emitting diode (LED)