Mx230 Pyro Board
The Mx230 Pyro Board is an optional accessory that plugs onto the backside of an Mx210 Kate-3 transmitter and adds deployment and staging capability.   An apogee event can be fired with GPS precision even at altitudes that reach into space!  In fact, all deployment and staging events are triggered by GPS data.  However, the accelerometer, gyro, barometric pressure sensor, timer and even manual command can also be used as back-up redundant triggers.  All events can be configured with the Mx220 Receiver.  No computer is needed.  The receiver has an interactive electronic Go/No-Go checklist that guides the user during setup prior to launch.
  • ​​Total of 7 dedicated pyro firing channels.
  • All 7 channels have an electronic 8 Amp current limit.
  • All 7 channels have built-in thermal and ESD protection.​​
  • All channels are opto-isolated from the transmitter board.
  • Pyro board power-on and arming can be done remotely from a safe distance.
  • Continuity status of all channels is transmitted to the ground.
  • Deployments can be triggered by GPS, accelerometer, barometric pressure, timer or manual command from the ground.
  • Staging can be triggered based on a flexible combination of GPS, accelerometer, gyro, and timer criteria.​
  • GPS derived tilt is used to inhibit staging and is completely insensitive to roll rate.
  • 3-axis gyroscope is also used as a backup to inhibit staging when the tilt limit is exceeded.
  • Built-in safety shunt disconnects and shunts sustainer motor ignitor leads.
  • One solid state relay (SSR) for controlling an external device such as a camera.
  • Two general purpose inputs for monitoring digital signals, switches, or beakwires.​
  • Supports external pyro battery: 2S LiPo, 3S LiPo, 9V Alkaline or 9V Lithium.
  • Reverse battery polarity protected.
  • Includes both high side and low side power FETs in firing circuit safety interlock.
  • Self-test performed at power-up. 
  • 1.9" wide x 4.0" long​
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Download
Pyro Board Quick Start Guide 
Rev-2.2  Feb 8, 2025
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Download
Pyro Board Brochure
Rev-A  July 2021
  Mx230 Option-10   Long Skinny Mounting Option
Mx230 Option-10 is a "long skinny" configuration that allows the Mx210 transmitter and Mx230 pyro board to be mounted back-to-back and fit inside a 2" ID tube (i.e. 54mm coupler tube).  It is intended for smaller diameter nosecones.  It includes the Li-ion system electronics battery and the pyro battery.  Everything is in one package. There is also an aft bulkhead that includes an anchor bracket for connection to a recovery harness.
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BACK SIDE
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FRONT SIDE
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Download
User Manual for Mx230 Option-10
Rev-1.0  May 5, 2021
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Dimension Drawings for Mx230 Option-10 
Rev-A  7/5/2019
Three pages of drawings showing all the critical dimensions. They are the same as the Kate-2 Mx152 Option-10.
3D CAD File for Mx230 Option-10
Rev-51   April 14, 2025
​This version is a standard 3D step file for use in any 3D CAD system.
kate_mx230_option10_v51.step
File Size: 27000 kb
File Type: step
Download File
This version is a Fusion CAD file.
kate_mx230_option10_v51.f3d
File Size: 8443 kb
File Type: f3d
Download File
Depending on your browser you may have to right click the download button and select "save link as..." to download the file and save it for your CAD program to open.
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Image of 3D CAD file available for the Option-10 configuration
 Mx230 Option-20   Outrigger Mounting Option
Mx230 Option-20 is an outrigger mounting option that allows the Mx210 transmitter and Mx230 pyro board to be mounted back-to-back.  It provides six holes for mounting the whole assembly onto an avionics bay sled.   The user will also need to mount the Li-ion electronics battery and the pyro battery to the sled. (Batteries not shown here.)
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BACK SIDE
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FRONT SIDE
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Download
User Manual for Mx230 Option-20
Rev-1.0  May 5, 2021
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Download
Dimension Drawings Mx230 Option-20
Rev-A  7/2/2019
Four pages of drawings showing all critical dimensions.
​They are the same as the Kate-2 Mx152 Option-20.
3D CAD File for Mx230 Option-20
Rev-2    April 15, 2025
​This version is a standard 3D step file for use in any 3D CAD system.
kate_mx230_option20_v2.step
File Size: 18333 kb
File Type: step
Download File
This version is a Fusion CAD file.
kate_mx230_option20_v2.f3d
File Size: 7833 kb
File Type: f3d
Download File
Depending on your browser you may have to right click the download button and select "save link as..." to download the file and save it for your CAD program to open.
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Image of 3D CAD file available for the Option-20 configuration
Optional Battery Board
The Mx230 Option-20 outrigger mounting scheme was originally designed to allow the user to mount the system battery and the pyro battery somewhere on the user's custom sled. However, a new optional battery mount board is now available that provides a very convenient mounting platform for the batteries.  It has the same dimensions as the Option-20 outrigger board shown above and the exact same mounting hole pattern.  It mounts neatly and compactly over the top of the transmitter while still allowing access to the power switch, LED's and USB connector.  It provides secure mounts for both batteries.
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Mx230 Option-25 Battery Board
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MORE BATTERY BOARD INFORMATION
Mx230 Option-25
This is a short HD video (47 seconds) that shows a 360 degree view of the battery board mounted to the Mx210 Kate-3 transmitter and pyro board.  Be sure to expand it out to full screen to get a good look at the entire package.  (There is no sound.)
 Mx230 Option-25 Configuration
The Mx230 Option-25 configuration shown below is the same as the Option-20 but with the Option-25 battery board installed.  The Mx210 transmitter and Mx230 pyro board are mounted back-to-back. The Li-ion system battery and the pyro battery are mounted over the top of the transmitter but still allow access to the power-switch, LED's and USB connector.   This configuration provides three mounting points along each side edge.  There are 4-40 screws and threaded standoffs at those mounting points that bolt the battery board to the outrigger board.  Those existing screws can be used (or replaced with longer ones if necessary) to mount the whole assembly onto an avionics bay sled. 
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LEFT SIDE
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FRONT SIDE
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RIGHT SIDE
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BACK SIDE
3D CAD File for Mx230 Option-25
Rev-33    April 15, 2025
​This version is a standard 3D step file for use in any 3D CAD system.
kate_mx230_option25_v33.step
File Size: 24761 kb
File Type: step
Download File
This version is a Fusion CAD file.
kate_mx230_option25_v33.f3d
File Size: 9136 kb
File Type: f3d
Download File
Depending on your browser you may have to right click the download button and select "save link as..." to download the file and save it for your CAD program to open.
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Image of 3D CAD file available for the Option-25 configuration
Dimensioned Drawings for Mx230 Option-25
Rev-A  August 25, 2023
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Download
 Mx230 Option-30   Extended Outrigger Configuration
Mx230 Option-30 is an extended outrigger mounting option that allows the Mx210 transmitter and Mx230 pyro board to be mounted back-to-back.  It provides ten holes for mounting the whole assembly onto an avionics bay sled.  It includes mounts for the Li-ion system battery and the pyro battery.
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BACK SIDE
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FRONT SIDE
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Download
User Manual for Mx230 Option-30
Rev-1.0  May 5, 2021
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Download
Mx230 Option-30 Dimension Drawings
Rev-A  7/8/2019
Four pages of drawings showing all critical dimensions.
They are the same as the Kate-2 Mx152 Option-30.
3D CAD File for Mx230 Option-30
Rev-8    Apr 15, 2025
​This version is a standard 3D step file for use in any 3D CAD system.
kate_mx230_option30_v8.step
File Size: 23720 kb
File Type: step
Download File
This version is a Fusion CAD file.
kate_mx230_option30_v8.f3d
File Size: 7497 kb
File Type: f3d
Download File
Depending on your browser you may have to right click the download button and select "save link as..." to download the file and save it for your CAD program to open.
Picture
Image of 3D CAD file available for the Option-30 configuration
 SUMMARY
​​Wondering what version of transmitter to buy?   
​Here are a few tradeoffs to consider.
Option-10 is usually mounted by placing it inside an 54mm coupler tube.  It can be used on 54mm and larger rockets.  However, being so skinny, it ends up being pretty long in order to fit everything together.   Option-20 is easier to mount on a sled or other structure and fits in airframes and nosecones 3” in diameter or larger.   With option-20 the batteries are completely separate.  You will need to figure out how to mount them on your sled or whatever structure you create.  However, this generally allows option-20 to require less overall length since you are taking advantage of a larger diameter.  Option-25 is the same as Option-20 but adds an extra battery board that is bolted onto the Option-20 unit to hold the batteries.    This eliminates the need to create your own battery holders on your sled.  Option-25 also fits in 3” and larger diameters.   Option-25 can be mounted to a sled using the same screws that bolt the battery board to the unit.   With Option-25 you can also remove the battery board if you want, and you are left with the Option-20 configuration.  Option-30 is for situations where length and width are of no concern.  It is very long but has everything packaged together and has lots of mounting screw holes available along its entire length.   
 More Pyro Board Photos
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BACK SIDE - PYRO BOARD
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FRONT SIDE - TRANSMITTER
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TOP VIEW
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BOTTOM VIEW
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TOP SIDE WITH ANTENNA MOUNTED
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BOTTOM SIDE WITH ANTENNA MOUNTED
 Mx151 Antenna Mount
The Mx151 antenna board attaches to the front end of the transmitter and provides connections for the downlink antenna and the GPS antenna.  In some situations, it can be advantages to mount the antenna board separate from the rest of the system and connect it with extension cables.  However, this is not recommended without first consulting with Multitronix to discuss your installation.
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BACK SIDE
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FRONT SIDE
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GPS AND DOWNLINK ANTENNA
Antennas can also be supplied with cables for remote mounting.
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