Pin diagram for Apex FMM

[coastal_kid]

I'd like to use a 2 wire float switch with my Apex FMM.
Can anyone tell me what which pins are are for power and which are for open/closed switch?

(PS: Can I use a 3 pole jack?)

(PPS: From other posts I learned that it takes a thin jack to fit into the FMM module. Any advice there?)

 

[Daniel@R2R]

Bump for you #apexusers and #DIYwizards. Any help?

 

[Crabs McJones]

@DarthSimon @rkpetersen @n2585722

 

[block134]

(PS: Can I use a 3 pole jack?)

I would stay away from a 3 pole jack because they may not like up right when inserted. I don't have a FMM to check this aginst.

 

[block134]

This may or may not help. Use at your own risk. FMM 3.5 mm jack

 

[coastal_kid]

This may or may not help. Use at your own risk. FMM 3.5 mm jack

I remember reading that thread. It included a schematic for an optical sensor, but not the FMM input, if I recall.
There is another thread where a reefer uses a 3-pole jack and everything "just works". https://www.reef2reef.com/threads/neptune-apex-breakout-box.329782/post-4098680

But I was hoping for some confirmation before I bought parts and looked around for my old soldering iron.

 

[TheHarold]

You could also just DIY a breakout box, just using a MiniDin8 cable. That gives you 6 inputs for open/closed switches such as float switches, magnetic reed switch, any DIY relay options, etc.

 

[lakai]

This is the pinout for those cheap $1.50 optical sensors. The same cheap ones that neptune uses.

 

[ellisz]

Did anything come from this? I picked up a FMM and now think a PM2 and a BoB would have been an easier solution.

 

[coastal_kid]

I never got around to playing with it. I would think a little experimentation quickly produce a solution.