Contact Closure Transmitter to Multiple Receivers with 1 SPDT Relay

Contract Closure Transmitter to Multiple Remote Relay Receivers

NCD MirM series controllers consist of at least 3 circuit boards, sold as a group.  MirM uses contact closure inputs in one location to control relays in several remote locations.  Two 1-channel relay controllers are included in the basic configuration.  MirM controllers consist of a contact closure input board, shown at the bottom of the main product photos.  Simply connect buttons or switches to the contact closure inputs of the contact closure transmitter to control 1 relay in two different locations for a total of 2 relays.  Wireless range of MirM controllers is up to 2,000 feet indoors and in urban environments, or up to 2 miles in line-of-sight applications.

MirM controllers are ideal for applications that require a centralized control panel to control devices in several remote locations.  Up to 24 remote locations are supported by our MirM series transmitter.  We will automatically upgrade the transmitter for more inputs at no additional charge based on the number of remote locations you require.

This set of controllers includes two 1-channel relay boards with general purpose SPDT relays installed, rated at 5 or 10-Amps (configured during purchase).  Please note that it is difficult to upgrade MirM in the future to include more relay outputs, as the main transmitter may need to be returned to us for reprogramming of additional units.  Each MirM controller requires a 12VDC power supply.

900 MHz 802.15.4 Wireless Communications

The sender board and each receiver board is equipped with a Wireless 802.15.4 Module.  MirM operates at 900 MHz, so it’s not bothered by WiFi or other common signals.  The wireless module adds wireless communications to the board using an 802.15.4 wireless protocol and will only communicate with it’s paired modules.  The module is powered from the board and the board itself will require 12 volts of power and can be hard wired or you can purchase a “wall wart” type transformer at checkout.

Who’s Qualified to Use the MirM Series?

The MirM Series Controllers are very friendly for first time users.  They arrive pre-configured and ready to work once powered up.  Whether you are an electronics engineer or a home hobbyist, only a small amount of electronics knowledge is required to use the MirM Series controllers.

Contact Closure Inputs

The MirM transmitter has contact closure input on-board to control each relay at each location independently.  Inputs can be wired to trigger any of the relays at any of the remote locations in any combination.  The inputs are contact closure inputs only – no voltage can be applied to these inputs.  Buttons, switches, other relays or other electronic devices can be used as an input and trigger the remote relays as long as no voltage is applied.

Relay Outputs

MirM Controllers have relays integrated into the receiver board for the remote locations.  Relays do NOT provide a voltage output, they provide a contact closure output and simply control the power to the device you are switching.  Wiring to a relay will be slightly different depending on the model of MirM controller you choose.

Break-A-Way Tabs for a Smaller Design

The MirM Receiver Boards have a great feature where space is a premium – Break-Away Tabs.  The Break-Away Tabs allow most receiver boards to fit in an optional undrilled plastic enclosure.  Snap off the Break-Away Tabs and you have a receiver board with a smaller profile when you need to fit in a tight space.

Relay Cycles

MirM controllers are fast, capable of activating remote relays in less than a second.  MirM controllers were designed for long life, you should expect to get years of service from your controller and literally thousands of cycles from the relay(s) onboard.  MirM controllers are covered under our 5-year industrial warranty, so you have problems, we’ll help get you going again.

Relay Options

MirM series controllers are manufactured according to your exact needs.  Please choose from the following relay options below:

10-Amp SPDT Relay Option

This controller is available with a 10-Amp relay option, allowing control of higher-power loads up to an absolute maximum of 240VAC at 10 Amps. Ideal for general purpose switching applications, this relays is focused on power-switching, and should never be used for low-power signals due to a higher On resistance of up to 150 Ohms when relay contacts are new (contact resistance drops to less than 1 Ohm after break-in period). The 10-Amp relay is of the SPDT variety, which provides Common (C), Normally Open (NO), and Normally Closed (NC) connections. Common is connected to NC when the relay is off. Common disconnects from NC and connects to NO when the relay is activated.  All connections are made via screw terminals, capable of accepting up to 12 AWG wire.

5-Amp SPDT Relay Option

This controller is available with a 5-Amp relay option, allowing control of higher-power loads up to an absolute maximum of 240VAC at 5 Amps. Ideal for general purpose switching applications, this relays is focused on power-switching, and should never be used for low-power signals due to a higher On resistance of up to 150 Ohms when relay contacts are new (contact resistance drops to less than 1 Ohm after break-in period). The 5-Amp relay is of the SPDT variety, which provides Common (C), Normally Open (NO), and Normally Closed (NC) connections. Common is connected to NC when the relay is off. Common disconnects from NC and connects to NO when the relay is activated.  All connections are made via screw terminals, capable of accepting up to 12 AWG wire.

Features

• Wireless Operation up to 1 Mile (1.6km)
• Contact Closure Triggers Relays in Remote Locations
  • Contact Closure Inputs on Sender Board
  • Relays on Receiver Boards
• Sold with Multiple Boards
  • 1 Contact Closure Board
  • Minimum Locations 2
  • Maximum Locations 24
• Inputs can be Wired to Your Needs
  • An Input for Each Remote Relay
  • One Input controls Multiple Remote Relays
  • One Input can Control All Remote Relays
• No Computers, No Programming
  • Just Simple Wiring of Inputs
• Prices Include 2 Remote Locations
  • Add More Locations at Checkout