RMS-100v2 has 2 power relays for remote control of AC/DC powered equipment.

RMS-100v2 relays

RMS-100v2 has two power relays for remote control of AC/DC powered equipment. When used in conjunction with the on board voltmeters, a voltage monitoring relay can be created. Each power relay gives you direct hardware control of fans, lights, computers, cameras, modems, radios, etc. No more long drives to reset a fussy piece of equipment. The power relays can be used to start or stop a generator.

Each relay has a manual override button that can toggle the relay; useful for on-site testing. Each relay also has a jumper shunt connector that allows the relay to be engaged manually for hands free testing.

Control of each relay can be done with a web browser. The picture below shows a portion of the RMS-100v2 relays web interface. In the picture below all relays are in the default "Normally Closed" position. By double clicking on the relay 1 icon....

Web relays

The relay will be toggled to the "Normally Open" position as shown below.

Web relay 2

The relays can also be toggled with RMS-100v2 relay Scripts. Relay scripts are made up of simple commands that control the relays. Complex relay actions can be performed to control your equipment. When used in conjunction with the on board voltmeters, a powerful voltage monitoring relay can be created.

Below is a screen shot of making a relay script to toggle relay 1 on, wait 2 seconds, then toggle relay 1 off again.

Relay script

Each relay can have a name and its actions defined. Below is a screenshot of a relay script that turns a pump on for 30 minutes and then turns it off again.

Relay names

Control of the RMS-100v2 relays can also be done by using ssh. Below is an example of using the rmsrelay command to toggle relay 1 on and off.

Control relays via Telnet.

Below is an example of reading the status of Relay 1 using the command line interface. Note the relay1, and relay2 file will contain a "0" when the relay is in the "Normally Open" position, and will contain a "1" when in the "Normally Closed" position.

Relay 3

An example of running a relay script on the command line using the rmsscript program. The example below runs relay Script 1.

Relay script 2

PHP programmers may want to write their own programs to control the relays. Below are two example PHP functions that use the PHP system command to turn relay 1 on and off.


  # © EtherTek Circuits 2001 - 2021

  #* Relay 1 ON Function        *
  function relay1on()
     system("/bin/rmsrelay 1 on");
  #* Relay 1 OFF Function         *
  function relay1off()
     system("/bin/rmsrelay 1 off");

Need more Relays? Add our USB Relay Add-on Board.

USB Relay Board

Our Story

EtherTek Circuits started its business in 2001. Ever since we have provided remote monitoring and control solutions for Remote Tower Sites, the Oil & Gas industry, Telemetry systems for Agriculture, Municipalities, Mines, Solar Farms, Hydro Plants, and the Military.

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