Wired Contact Closure Relay 4-Channel 20-Amp

Wireless Contact Closure

The MIRXR420_ZRS are sold in pairs, you will receive both boards shown here when you purchase this set.  These boards will give you the opportunity to control a relay using a simple dry contact.  Contact closure devices such as buttons and switches attached to inputs on either board will control relays on the opposite board.  Both boards are basically the same except the inputs will always control the relays on the other board.  When an input on one board is tripped by a contact closure the corresponding relay on the other board is energized.  Communication between both boards through a wired connection.  Pricing shown on our web site indicates pricing for the pair of boards.

Go Where Wireless Won't Reach

MirX boards with a wired connection should be used in applications where wireless is not an option.  Direct wired applications are advisable between thick masonry walls, steel, or underground installations where a wireless signal won't travel or in areas where there may be interference.  MirX_ZRS controllers are also suitable in applications where security may be a concern.

ZRS Modules

Each board is equipped with a ZRS Module.  The ZRS Modules will be physically wired together using the screw terminal located on the module.  A Quality cable such a s twisted pair Cat 5 or Cat 6 is ideal with a working range of 1000 feet (300 meters) between controllers.  The module is powered from the board and each board will require 12 volts of power and can be hard wired or you can purchase a "wall wart" type Power Supply at checkout.

Read Status of Remote Relays

Both boards are also equipped with LEDs that display the status of the remote relay.  Status information is verified using 2-way wireless communications.  If communication is lost between the devices, the LED will turn off.  Additionally, every MirX controller is equipped with a Busy/Ready LED.  If the Busy LED flashes, this indicates the other device has successfully received and accepted your contact closure status.  If the Busy LED does not flash, the remote device is out of range (1000' or 300 m).

Order of Operations
• Contact closures are read on one controller
• Data is sent to other controller to turn on or off relays
• Remote device replies back
• Busy light flashes to confirm data was received at the other end

What Happens When Communication is Lost

A common question we receive is what happens to the relay that is energized and communication between the boards is lost.  The relay can remain energized or on until communication is re-established or the relay can de-energize or turn off.  This is done by a simple jumper on the board and setting it to Beacon or Smart mode.  Regardless of the Mode you choose, if the busy LED flashes, the two devices are communicating properly.  If the Busy LED does not flash at all, the devices are unable to communicate. 

MirX Relay

This pair of boards allows you to control a relay using a dry contact (no voltage).  The dry contact can come from a manual switch, a sensor or device that provides a contact closure, or another relay.  As long as the contact closure circuit is closed the relay will remain energized or on.  When the circuit opens the relay will de-energize or turn off.  Meaning the relay will respond to a toggle or momentary connection depending on what type of input you select.  Each MirC pair is ready to stand up to rigorous demands from heat, cold or vibration.  Take it from us, these controllers will hold up!

Status of Remote Relays

Both boards are also equipped with LEDs that display the status of the remote relay.  Status information is verified using 2-way wireless communications.  If communication is lost between the devices, the LED will turn off.  Additionally, every MirX controller is equipped with a Busy/Ready LED.  If the Busy LED flashes, this indicates the other device has successfully received and accepted your contact closure status.  If the Busy LED does not flash, the remote device is out of range.

Contact Closure Inputs

The inputs on these boards accept a dry contact only - no voltage.  Users must never apply any voltage to an input on either of the MirX Controllers.

Relay Outputs

Relays do NOT provide a voltage output and can be used as a dry contact.  They provide a contact closure output and simply interrupt the power to the device you are switching.  The relays are rated for 240 VAC or 24 VDC.  See the Data Sheets tab above for the specs on relays installed.

SPDT Relay Installed

This device has SPDT relays installed.  SPDT Single Pole Double Throw Relays have three connections - Common, Normally Open, and Normally Closed.  When the relay is off, the common is connected to the normally closed connection of the relay.  When the relay coil is energized, the Common swings to the Normally Open Connection of the Relay.  You can wire the device you are switching to either the Normally Open or the Normally Closed position using screw terminal connections.  The maximum guage wire the terminal can handle is 14 ga but we have used up to 12 ga solid core for several applications with no issues.

2-Million Cycles

MirX series controllers are designed for long life, you should expect to get years of service from your controller and literally 2-million cycles from the relays on board.  With a 5-year warranty and a money back guarantee you have nothing to loose!  Place your order now, while everything is in front of you.

Break-A-Way Tabs for a Smaller Design

The MirX relays have a great feature where space is a premium - Break-A-Way Tabs. The Break-A-Way Tabs allow most boards to fit in an optional undrilled plastic enclosure.  Snap off the Break-A-Way Tabs and you have a controller with a smaller profile when you need to fit in a tight space.

5-Year Warranty/Money Back Guarantee

MirX controllers are guaranteed against manufacturing and functionality defects for a full 5 years!  Not to mention a 30-day money back guarantee!  If for any reason you are not happy with a relay purchased from Relay Pros, simply return it within 30 days and we will give you your money back!  Controllers that are damaged by our customers will not of course be warranted under any circumstances. 

This Board is RoHS Compliant

This board is led free and RoHS Compliant.  If your requirements are for RoHS compliant parts this board is manufactured with RoHS compliant led free parts and solder.

Shipping

The boards sold are brand new units shipped from our office conveniently located in Missouri.  These boards are completely tested before they are released for shipping  With so many boards on our site it is impossible to stock boards, please allow two to three days production time for your order to ship.  If you have any questions please feel free to call our office at 800-960-4287 or e-mail us at sales@relaypros.com.

Contact Closure Relay Is Here!

A more streamlined manufacturing process brings a more durable, reliable and better relay board to the market. Here's a lists of great features:

User Friendly Board Design

• Single Pole Double Throw Relays Installed
    - Wire to Normally Open or Normally Closed Position
    - 12 Guage Solid Core Wire Capacity
• Screw Terminal Contact Closure and Relay Connections
• Break-A-Way Tabs Lets you Decide the Board's Size
• Temperature Rating -40° C to 85° C
• RoHS Compliant

MirX Features

• Control Relay From a Dry Contact (No Voltage)
• Inputs and Relays on Both Boards
• Inputs Control Relays on Opposite Board
• Each Board Displays Status of Remote Relays

Data Sheets & Quick Start Guides

Below are the Data Sheets Quick Start Guides for this board.  These are the guides that will help you communicate and configure this board.