Multi-Point to Point Contact Closure Relay 4-Channel 5-Amp

Contact Closure From Multiple Locations

The MIRWR45 can have up to eight remote locations that can all control the relays on the receiver board.  All Sender boards will have one contact closure input and any location can toggle the relay on or off.  Contact closure inputs such as buttons, switches or other electronic devices (no voltage) attached to inputs on the sender boards will control the relays on the receiver board.  The Sender boards have an input while the Receiver board has the relay.  When the dry contact (no voltage) circuit on the Sender boards is closed the relay on a Receiver board is energized and will remain energized until the dry contact circuit opens on any of the sender boards.  Communication between the Sender boards and Receiver board is Wireless.  Pricing shown on our web site indicates pricing for two contact closure sender boards and one receiver board.  More sender boards can be added at checkout up to 8 locations.

Remote Sender Locations

The remote locations (sender boards) communicate wirelessly from up to eight different locations.  These locations will have to be in range of the receiver board.  The receiver board will receive a command from one of the the sender boards when a contact closure input is tripped to control the relay from different locations.  Additional remote locations can be added at a later date but all married boards in the system will need to be sent back for configuration.

XBee-PRO 900 RF Module

The MIRWR45 boards are equipped with an 900HP Modules and are paired together using the serial numbers of the radios installed.  The XBee-PRO 900 RF module is ideally suited for less power-hungry, low-latency point-to-point applications.  Capable of point-to-point and peer-to-peer, the XBee-900 modules have a higher selectable transmitting power of 250mW.  This higher TX power allows for line-of-sight range up to 15 miles with the right antenna.  All range tests are conducted in clear line-of-sight installations.  It is not possible for us to accurately predict range prior to purchase.  We cannot predict range inside buildings, using google map images, or predict interference that may be present at your location that would prohibit proper operation.The module is powered from the board and the board itself will require 12 VDC power and can be hard wired or you can purchase a "wall wart" type Power Supply at checkout.

Standard Range Antenna

The 900HP Standard Range Antenna (distance of 2 miles) is included with the price of the boards.  The included antennas are a 6" whip antenna with an RP-SMA threaded connection.  The antenna will screw directly onto the wireless module.  NCD has tested this device at 2 Miles with excellent results using smaller antennas than what would be required to achieve the 28-Mile range achieved by the manufacturer.  All range tests are conducted in clear line-of-sight installations.  It is not possible for us to accurately predict range prior to purchase.  We cannot predict range inside buildings, using google map images, or predict interference that may be present at your location that would prohibit proper operation.

Extension Cable

An extension cable can be used position the antenna if needed.  The cable should be no longer than 20' (6 m) to prevent signal loss.  The antenna uses an RP-SMA connection or Reverse Polarity SMA connector.

Line-Of-Site Operation

As with any wireless technologies, for optimal performance it needs to be line-of-sight.  We can't stress this enough.  In other words the antennas of the boards must "see" each other to get the optimal range or even be able to communicate at all.  Obstructions like walls, buildings and even trees and hills can diminish the signal or prevent communication altogether.  Metal being the worst for any wireless signal to penetrate with stone, brick and hills being a close second.  Upgrading to a longer distance module will not mean that the signal will be able to penetrate these obstructions even at a short distance of a few feet. 

Multiple MirW Sets

Multiple sets of the MirW boardss can be used within range of each other.  The boards are married together using the serial numbers of the wireless modules installed, meaning multiple pairs will not interfere with each other!  Please note: When there are large numbers of devices using the same channels, there will be interference that can cause dropped communications.  There are ways to combat this interference, there are a few things that can be done.  Contact us if you are quoting a large job for more information.

Who’s Qualified to Use the MirW Series?

Anyone!  The MirW Series Controllers are very consumer-friendly devices that are married together through software and only require some wiring by the end user.  Whether an electronics engineer or a home hobbyist, almost anyone is qualified to use the MirW Series controllers. 

MirW Relay

We have looked at the interface and the MirW Concept now let's take a look at the board design itself.  These controllers allow you to trigger a relay simply by using a contact closure (no voltage).  All relays are electronically latched, depending on the contact closure input that you are using you can momentarily keep the relay on or use an Alternate Action Switch can trigger relay on then off.  The relay on the receiver boards can also be used as a contact closure input in applications that require a contact closure trigger point.  Fully tested before they leave the production facility each MirW pair is ready to stand up to rigorous demands from heat, cold or vibration.  The best test of all is the numerous boards in the field from customers all over the world in all sorts of conditions.  Take it from us, these controllers will hold up!

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 any of the MirW Sender Boards.

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

The Receiver Board 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 over 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

MirW 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 MirW sender boards 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 board with a smaller profile when you need to fit in a tight space.

5-Year Warranty/Money Back Guarantee

MirW 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 manufacturing facility 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 5 to 7 days production time for your order to ship.

Who’s Qualified to Use the MirW Series?

Anyone!  The MirW Series Controllers are very consumer-friendly devices that are married together through software and only require some wiring by the end user.  Whether an electronics engineer or a home hobbyist, almost anyone is qualified to use the MirW Series controllers. 

Induction Capacitors

Perhaps the most overlooked aspect of relay control is proper handling of inductive loads.  Inductive loads are anything with a magnetic coil, such as a motor, solenoid, or a transformer.  Controlling a inductive load using these boards requires induction suppression capacitors to absorb the high voltages generated by inductive loads, blocking them from the contacts of the relay.  Without this capacitor, the lifespan of the relay will be greatly reduced.  Induction can electrically interfere with the microprocessor logic of the boards, causing relay banks to shut down unexpectedly.  If this happens the boards may need to be power cycled to restore communication.  Capacitors are available at checkout, for more information and drawings view our Induction Suppression Page.

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.

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