Mueller SprayControl section control

Making automatic section control with AOG for old Mueller Elektronik Spray Control - S connected with Switch-Box for controlling 4 sections:


The electronic could be set at different type of valves (with or without bypass - mine are without bypass). The control signals (12V logic) are going to the SwitchBox to turn on relays for controlling flow and also to have feedback from different switches (manual/auto, rate +/-, on/off, section switches).

This is what is looks like inside the SwitchBox:

Upper connector - connected to SprayControl
Lower connector - cable output to the sprayer

Based on the manual, I made small PCB really quick and put DPDT relays on it. I tested the PCB as a static and it works well. The problem is with through holes for relays (too small), bad pinout on voltage regulator (has to be mounted upside down), and forgot to add flyback diodes on relay coil (putted manually) - it was my first PCB, so dont judge.


I have a pinout describtion from Mueller:
Lower connector - cable going to the sprayer:
Upper connector - connected to SprayControl



i"m about to make the same section control for this Mueller device. Did you just solder wires
to the switches and actived them with the relays ?


you may look here: Section control for the central unit


Any chance that you can re-upload the images that are not available anymore?
I would like to set up automatic section control for my mueller spraycontrol box and keep the existing box and switches and be able to use it in “manual” mode without AOG.

Has anyone integrated AOG section control with this box? How have you integrated?

An interesting way to do it would be to use a dedicated box which connect between the 2 mueller boxes (the top one that manages rate control, width, flow, … and the bottom one with switches) and before the sprayer. I think it would do the magic without making any change on the mueller boxes. Something similar to the teejet section control box:

Also I found this pinout for the mueller spray control box: