Installing the Insteon Micro On/Off Relay Module for Controlling Light Fixture

Recently I started automating the lights in the closets in our house, starting with those the most used on the main level. I quickly discovered that the light switches for most of the closets in the house have only a switch wire running to the switch box (14/2) and no line feed wire or neutral. You can get a special Insteon dimmer for 2 wire applications (no neutral), but it's more expensive that the standard controls, and not suitable for flourescent fixtures (which I have). 

So, I ordered up 6 of the Insteon Micro On/Off Relays, to get around this issue. The micro relays have two sense wires, that allow you to control the module using a standard electrical switch, and can be configured for several modes to accommodate momentary switches, latching switches, or double pole momentary switches. 

Standard north american 110V light switches are single pole latching, and standard north american 3-Way light switches are double pole latching. Latching just means that the switch connection stays connected once you take your hand off the switch. So from the documentation, I figured that the latching wiring diagram shown below would be suitable for my application. 

Insteon Micro On/Off Relay Module, with the Latching Wiring Diagram
Whenever I set up an Insteon module for installation, I normally label the application with a Brother P-Touch labeller, then take a photo with my phone. When it comes time to add the device to my network using the ISY-994i, I can quickly bring up the Insteon address and the application to correctly add the device manually with the ISY commands.
When using standard north american light switches as the control switch (latching), the purple sense wire is not used, so I roll it up and tie wrap it into a loop to keep it out of the way. Only the yellow sense wire is used. 

Connections are simple. For my application, I required pigtails for line, neutral, and load. I used 14 guage stranded wire for the line and neutral wires for additional flexibility in placing the module back into the electrical box.
The Micro On/Off module is a nice small size, and fits quite well in an octagonal box. It's much more convenient than the older On/Off modules which were just about the same size as the Insteon switchlinc modules.
The Micro On/Off Relay wired up and ready to stuff back into the electrical box. I used a bit of yellow tape to mark the cable coming back from the light switch box to indicate which wire to connect to the sense wire. The sense wire seems a bit fragile - I connected this last and was careful not to put too much stress on the wire. 

Here's the module rearranged in the electrical box. The flourescent light frame will cover the opening once installed. 
I typically label these sensors with a Brother P-Touch labeller prior to installation, and label the battery with the installation date. A quick photo with my phone and I have a record of the configuration, including the Insteon address on the sticker on the circuit board. This way, when it comes time to link up the sensor with my ISY-994i, I simply bring up the photo in my phone screen to recall the Insteon address for adding the device manually.
Insteon Door Open / Close Sensor ready for installation on the closet bifold doors. 
Once the module is installed, it worked perfectly without any additional configuration. It ships prepared for operation with latching switches on the yellow sense wire. What is nice is that regardless of which state the Micro On/Off Module is left at, one tap of the connected switch (up or down), will change the state again on the Micro On/Off module. So - you don't have to flick the manual light switch off and then on again to control the light. The next switch of the light controls the module, regardless of which state the module is in, or which state the switch is in.

Overall I'm impressed with this device. Very nice. Good small size. Simple installation (depending on how much time it takes to remove your light fixture to get behind it to the electrical box), and good functionality with the sense wire input for hooking up to a standard light switch for control.

UPDATE - ONE MONTH FOLLOWING INSTALLATION - This feature - linking the Insteon Open / Close module to the closet lighting control - Micro On/Off or Switchlinc On/Off - is another one of my favourite Insteon features. Open the closet door - light comes on. Close the door - light goes out. Even during the day with a good amount of background light this feature is quite appreciated.


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