EPC-D-F-ATS UL1008 Transfer Relay for Use with All Dimming Systems

(Formerly Known as RLY-DIM-D)

The EPC-D-F-ATS is a single zone, silent emergency transfer control with universal dimming capability. It can be used with 2-wire and 3-wire line voltage dimming systems, as well as 0-10V, DALI, and Lutron EcoSystem. The EPC-D-F-ATS allows emergency lighting to be dimmed with regular lighting during normal times. In the event of utility power interruption, the EPC-D-F-ATS will automatically transfer designated emergency fixtures from the dimming control to the emergency power source and bring them to full brightness, regardless of whether the dimming system is in operation or turned off. Applications include designated dimmable emergency luminaires in public places such as auditoriums, restaurants, conference rooms, theaters, classrooms, and offices.


  • Slim, attractive universal mount enclosure allows flush, surface, panel, and box mounting
  • Utility and emergency power indicator LEDs
  • Integral front-mounted test switch voltage surge protection
  • Plenum rated
  • Field selectable automatic testing, inverter, or fire alarm interface options; contact factory for details
  • Triple Interlock (electrical, mechanical, and time delay) maximizes safety and reliability by eliminating arcing and the potential for phase to phase shorts between separate power sources during transfer
  • Oversized 50A-rated relay contacts allow high inrush loads to be used safely and reliably; tested at more than 5000 cycles Works with normally-on and normally-off type inverter systems