The Simplicity of MirC, The Security of Bluetooth
Contact Closure Inputs on Sender Device
Relay Outputs on Receiver Device
Secure, Fast, Reliable Wireless Communication
Two Boards Working Together
Mir-C controllers are really two boards that allow contact closure inputs on the first board to control relay outputs on a
second board. The sending device is equipped with contact closure inputs, the receiving
devise is where the relays are. Both sender and relay devices are included when you purchase a Mir-C pair. 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.
Bluetooth Wireless Range
The distance between MirC controllers will affect reliable operation. MirC controllers will offer better range if two MirC controllers
are within line of sight of each other. If it is not possible for 2 MirC controllers to see each other, more expensive communications
options will improve working distance for most users. You can expect MirC devices to function properly in most applications between
100 feet and up to 300 feet depending on communications module and antenna options chosen. Bluetooth MirC controllers are available
with 2 options. The default option is the "Standard Range", which operates up to 100 feet and includes a small integrated antenna
that cannot be moved or positioned. The "300 Foot Range" option offers communication between devices up to 300 feet apart (line of sight)
and includes a small external antenna.
Mir-C devices feature SPDT & SPST relays and are available with the same number
of contact closure inputs on the sender as there are relays installed on the
remote device. Contact Closure Inputs may only be connected to switches,
buttons, or sensors with Contact Closure capability. Not suitable for use in
voltage detection applications.
Who's Qualified to Use the Mir-C Series?
Anyone. The Mir-C Series Controllers are the most consumer friendly devices at Relay Pros. Weather
you are an electronics engineer or home hobbyist, anyone is qualified to use the Mir-C Series controller
The sending device is also equipped with LEDs that display the status of the remote relay. Status information is
verified using 2-way communications. If communication is lost between the remote relay and the sending device,
the sending device will turn off the LED. Additionally, every MirC controller is equipped with a Busy/Ready LED. If the
Busy LED flashes, this indicates the remote device has successfully received and accepted your contact closure status.
If the Busy LED does not flash, the remote device is out of range.
Communication Between Boards
Mir-C devices use Bluetooth, 802.15.4, wired and Ethernet two-way communications to
ensure the remote device is properly functioning. The Busy LED is always used to indicate a properly functioning remote
device. If you do not see the Busy LED flash, then the Mir-C controller is unable to communicate to the remote device. A
flashing busy LED is your verification that all communications are functioning properly between Mir-C controllers.
Multiple Mir-C Pairs?
Multiple Mir-C Controllers can be used in one locations. One Pair of Mir-C controllers will not interfere with another Mir-C pair
as they are isolated through the way they are designed. Mir-C Devices are paired together before shipment and will only communicate
to each other, for this reason they will not interfere with other Mir-C controllers.
Contact Closure Inputs
A Mir-C Sender controller has as many inputs as its mating Mir-C Receiver has Relays. So a pair of 4 relay Mir-C controllers
will have 4 relays on the Receiver board and 4 inputs on the Sender board which are used for controlling the relays on the
Receiver Board, the same holds true for 1, 2, and 8 relay versions. Users must NEVER apply any voltage to an input on the
Mir-C Sender controller, these inputs are for Contact Closure connection only.
Mir-C Controllers have 1, 2, 4, or 8 Relays integrated into the circuit board. A relay is similar to a switch. The only
difference between a switch and a relay is the actual mechanism for changing the on/off status of the switch. On a
switch, you manually push on a piece of metal or plastic to operate the switch. On a relay, an electric current is
used to operate the switch. Relays do NOT provide a voltage output. They provide a contact closure output, exactly like
the terminals found on a light switch at your local hardware store. Wiring to a relay will be slightly different depending
on the model of Mir-C controllers you choose.