Products and services

Lighting control

Wireless control

Active circuit transmitter

The Active Circuit Transmitter (ERM-DA) indicates when an electrical circuit is active by transmitting a standard occupancy profile telegram. The state of the monitored circuit can be used to switch or trigger remote events.

Retrofit applications will benefit from the elimination of extra wiring.

Used in a hospitality application, existing key card systems activate circuits based on suite occupancy.

Using the transmitter with these systems allows the facility to gain control over other electrical loads. Suite vacancy can de-energize plug-in appliances like televisions or turn lights off. Wired-in systems such as window blinds can retract to a preset, reducing solar and infrared radiation into the suite.

Other commercial facilities can benefit by adding a transmitter to electrical circuits controlled by other automation systems, processes or switches. Using the device to transmit circuit status can trigger other processes or turn ON or OFF electrical loads, making it easy to expand automation systems or automate manual processes.

The transmitter installs in electrical junction boxes, behind receptacles, wall switches or in light fixtures and is powered by 120 through to 277 VAC (a 24 VAC/DC model is also available). Assignment of the transmitter to a receiver is as easy as pressing a button.

The transmitter can be used as a telegram repeater increasing the radio range of neighbouring Gentec devices.

  • Uses the state of an electrical circuit as a switch to activate loads ON or OFF
  • Expand existing automation systems or quickly; add automation to any electrical circuit
  • Use with lighting controllers or wall mount thermostat controllers
  • Supports telegram repeating; single or dual hop increasing the range of near-by Gentec devices
  • Reliable radio reception range of 24 m (80 ft), commercial office spaces (typical), up to 100 m (330 ft) line of sight
  • Low-cost alternative to running wires and conduit, ideal for retrofit projects
  • Versatile voltage range 120 through to 277 VAC or 24 VAC/DC model

Listing and Compliance

Safety (90-240 and 120-277V):

  • ETL Listed Component
  • Conforms to UL Standard 508
  • Certified to CAN/CSA Std. C22.2 No.14

Radio Frequency (902 MHz):

  • FCC Part 15.231– Remote Control Transmitter
  • IC RSS-210

Hardware Specifications

  • Power Supply:
          • ERM-DA(*)-277: 120–277 VAC, 50/60 Hz
          • ERM-DA(*)-LV: 24 VAC/DC
          • ERM-DA(*): 90–240 VAC, 50/60 Hz
  • Power Consumption:
          • 90–277 versions: 1.0 W
          • 24 V versions: 600 mW
  • Outputs: 2 x LEDs, Learn (green) and Power (red)
  • Inputs: Repeater and Status buttons


  • Radio Frequency: 902 MHz
  • Antenna: Whip
  • Transmission Range: 24 m (80 ft) – commercial office spaces(typical), up to 100 m (330 ft) line of sight

Mechanical Specifications

  • Operating Temperature: –10 °C to 40 °C (14 °F to 104 °F ) ambient
  • Relative Humidity: 5 % to 95 % (non-condensing)
  • Weight: 56.7 g (2 oz)
  • Dimensions: 55.6 x 37.7 x 25.5 mm (2.2 x 1.5 x 1.0 in)