EKM Switch120

EKM Switch120 - EKM Metering Inc.

EKM Switch120


The EKM-Switch120 is a power cord that switches 120 VAC with a DC control voltage of 3.3–60 VDC, which allows it to be controlled remotely.

Description: Remote Switchable 120 VAC Power Strip with 4x outlets.

Connections: Low Voltage DC Pos(+) and Neg(-), 1x Standard male 3-prong NEMA 5-15 120 VAC, 1x Always On Standard female 3-prong NEMA 5-15 120 VAC, 1x Normally On Standard female 3-prong NEMA 5-15 120 VAC, 2x Normally Off Standard female 3-prong NEMA 5-15 120 VAC

Model: EKM-S120

Control 2 of these 120 volt switches by connecting them to our Omnimeter Pulse v.4 or Omnimeter HV v.5

Each switch can be controlled independently using a Push3 gateway and Push Account Portal, or a USB Converter and the EKM Dash software, by connecting them to Output1 and Output 2 on the v.4 or v.5 Omnimeter.

This is a power cord that switches 120 VAC (up to 15 amps) with a DC control voltage of 3 VDC @ 3mA to 12 VDC @ 30 mA. This device gives you the capability to turn your power on/off remotely using a very tiny control voltage! It is big enough to control major loads: pumps, lights, appliances, etc.

It's Safe:

  • 3kV optical isolation – eliminates shock hazard.
  • Relay hysteresis – prevents relay chatter.
  • De-bounce protection – extends contact life.
  • LEDs – verify input voltage and switch state.
  • No exposed 120 VAC voltages and no dangerous 120 VAC wiring required.
  • Plugs into standard American 120 VAC 3-prong household outlets, power strips, and extension cords.
  • Eliminates the exposure of hazardous voltages in DIY projects, classrooms, and on development work benches.
  • No special 120 VAC wiring when deploying new products and custom solutions.
  • Can be installed by non-technical users.
  • 5300 Vrms isolation from the 120 VAC circuit.
  • A 12A thermal safety circuit breaker switch prevents overloads and adds supplemental protection.
  • A large 3600W MOV clamps surges for clean power

It's Convenient:

  • Easily inserts between power source and corded electrical devices.
  • Switches up to 15 amps with a control signal as low as 3vdc at 3ma. Ideal for use with battery operated controllers or micro controllers.
  • Connects directly to an Arduino or other MCU digital pin without the need for driver transistor or buffer circuit.
  • Two-wire voltage control signal connects to terminal block (30-14 AWG).
  • LED indicator shows status of control signal.
  • Units are "stackable" and easily mount with two screws.
  • Connect input plug to wall outlet or power strip.
  • Connect output receptacle to a single powered device or up to 4 powered devices.
  • Output devices may be 3-prong or 2-prong appliances or lights.
  • Convenient safety ground connection available for grounding external control circuit.


  • AC input: NEMA 5-15P Plug, standard 120vac with ground.
  • AC output: NEMA 5-15R Receptacle, standard 120vac with ground.
  • Switching capacity: 15amps @ 120vac.
  • Life expectancy: The durable SPDT control relay is rated at 30/40A, 400,000 operations at 12A resistive. At no load the estimated lifetime is 5.3 million mechanical operations.
  • Control input: 3.3–60 VDC (3-30ma) or 12–120 VAC, terminal block accepts #30-14 AWG wire.
  • Switching Speed: 15 ms max actuate, 10 ms max release.
  • DC to AC circuit isolation: 5300 Vrms.
  • Indicator: LED indicates when DC side is energized.
  • Protection: AC side protected with 150V AC MOV; DC side is transient free.
  • Mounting: Two #6 screws. Indoor use only.
  • Temperature: -35ºF–145ºF

For more information about our products and services, we encourage you to visit our online Knowledge Base, which provides spec sheets, videos, tutorials, FAQs, diagrams, and more.


Ask a Question
  • Would this work to power on a audio amplifier from a Yamaha CXA5100 preamp via the 12v outputs?

    If your amp can produce 3-30 milliamps on the control signal,  then it should work.

  • Will this outlet work with Atkinson\'s VRDC relay? I want to be sure that the output voltage of the VRDC will trigger the EKM Switch 120 and not damage it.

    Atkinson offers a variety of relays but I think that they do have an option that will work. Be sure that the relay control voltage is within these specs: 3VDC @ 3mA to 12VDC @ 30mA

  • Could this be used to control a small A/C unit or dehumidifier - by using a limit switch that closes the DC circuit? (i.e. could I put a limit switch on my garage door and use the EKM switch to only power a small A/C unit when the door is closed?)

    Provided that your AC unit and/or dehumidifier are 120v appliances that draw 15A or less the Switch120 may work. The limit switch on your garage door simply needs to provide from 3 VDC at 3mA to 12 VDC at 30mA, to the Switch120, for it to provide 120V to your appliances.

  • What is the range on the remote?

    I'm not sure I understand the question. This product is not a remote. It is a switch that is controlled remotely. The possible length of the two control wires depends on the voltage provided, as voltage drops over distance. The Switch120 needs 3-12VDC (3-30mA) in order for the switch to actuate. So if you're providing 12VDC then your distance could be 400ft, possibly more.

  • 2 questions: Is it UL-approved? Does it ship from a warehouse in the US?

    No, the Switch120 is not UL Listed or Recognized. Yes, these ship from our warehouse in Santa Cruz, California.

  • The receiver is an AV receiver (for home theater) It is a Onkyo TX-RZ900. It has a 12V AC trigger, up to 100mA. Also, which connector cable does one need to attach to your device?

    I don't have any experience with this receiver so I won't be able to say for sure if the switch will work with it. It seems like it may work but I don't wan to give you false information.

    The connections are made with twisted pair wires like the ones you find in CAT5 cable. You can see this in the images above.

  • Can I use the "12V Trigger out" from my receiver to operate this switch?

    I don't know what you mean by "receiver" so I won't be able to tell you if it will work with this switch. The switch will work with 3 VDC at 3mA up to 12 VDC at 30mA. The Omnimeter Pulse v.4 has 2 controllable outputs that can be used to control this switch. Using this meter you can also use the EKM Dash software to control the switch from a computer.