Neptune Systems I/O Breakout Box

Neptune Systems I/O Breakout Box
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  • Neptune Systems I/O Breakout Box

Neptune Systems I/O Breakout Box

93% Recommend this to a friend (25 of 27)

SKU: 207510
In Stock: 94
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Quick Overview

Add the I/O Breakout Box to your current aquarium controller an easy way to connect up to six external switch inputs. The breakout box is compatible with any Apex Controller.

  • Float Switches for sump alerts or ATO (Auto Top Off)

  • Push Buttons for special feed, cleaning, ect. modes

  • Leak Detectors

  • Magnetic switches on cabinets for intrusion detection


Full Details

Customize your Neptune Apex Controller with the I/O Breakout Box. Add float switches, magnet switches, or any other open/closed device. The Breakout box does not power any accessories but lets you monitor the signal of the switch connected to it, and then you can program your Apex controller to react to the change in the status. The breakout box can connect to any open I/O port on an Apex Controller System.


Besides the conventional float switches, the options that you unlock with your Apex and a breakout box are virtually endless. Below is a short list of examples for possible switches and what they can accomplish. 

  • Float Switches for Auto Top Off
  • Reed Switches for cabinet lighting or intruder detection
  • Humidity Sensors for turning on and off fans or dehumidifiers
  • Momentary Switches for a time-based function like saltwater mixing or water changes
  • 3-Way Toggle Switches for overriding programmed outlets
  • Leak Detection Switches for notifying you when a leak is occurring


What's Included?

  • 1x Neptune Systems Breakout Box


Items 1 to 12 of 27 total

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  • Good , but the avast is better By Dave on 2/26/2017

    Great addition to an apex, but the single ground pole is annoying. Avast marine has a better design
  • Great for Switches By Jason on 1/14/2017

    Setup switches to turn on and off equipment without login into anything. Float switches can also be utilized with this breakout box.
  • Awesome By Jason on 9/16/2016

    Absolutely love this thing. Have it running my ambient lighting for my stand and several float switches. Very easy to set up and the possibilities are endless.
  • Good Product By Chris J on 9/16/2016

    Using it for my leak detectors, automatic cabinet LEDs and float switch warning notification. Works perfect with no issues.
  • Works great By JGRC on 8/31/2016

    Using for ATO float, Low level and High level alarm sump alarms . Very happy with the breakout box
  • Easy Install By Brett on 8/18/2016

    Got this to use on my NEW Apex 2016 model. Pretty much plug and play..except you will NOT see it on Fusion until you actually wire something up to it...just plugging it in will not recognize the BOB. Once I wired my float switch into it, it shows right up. Im using this as a 3rd switch to turn OFF my ATO if the other 2 fail. Endless possibilities for uses...Im sure I will wire more things into it.
  • Easy, and works as described By Kurt on 6/2/2016

    I'm using this for a day topoff. Works great, easy as pie to setuo
  • Works really well for floats, sump door sensors, & leak sensors. By MTWiley on 11/2/2015

    I have mine monitoring my DT overflow to turn off the return pump if the drain gets clogged and prevent an overflow onto my floors. A magnetic door switch to turn on the fuge light whenever I open the sump/stand door so that I can actually see when I'm looking around inside my sump area. And I picked up a few leak sensors and have those hooked up to the breakout box instead of spending much more on the an ALS and sensors.
  • Best Part of the Apex By Evan on 7/18/2015

    I'm coming to think that this may be the best part of the Apex system.

    I was worried about overflowing, so I hooked up some float switches to send emails to me.

    I hate working in a dark sump, so I wired some magnetic switches to turn on a light when I open the stand doors.

    I wanted to speed up maintenance, so I stuck a button in a box to to automatically turn off and on equipment as needed.
  • Work Well, wish apex made switches By Polymorphyc on 6/17/2015

    Pretty much plug and play, just be mindful it where its plugged in, because that effects the switches names when programming.
  • Great product, but not for an Apex Junior By AZBigJohn on 4/24/2015

    Wish the first comment had been there when I bout this module. I own an Apex Junior, and my ATO system died. I bought this to use to make an ATO system, only to find out that in order to use it with an Apex Junior, you also have to buy another module (PM1 or PM2) which then pushed to cost too high, and made it much more affordable to simply buy a stand alone ATO.

    If you have an Apex, GO FOR IT! If you have an Apex Jr, don't.
  • Added a couple of these to my Apex. By Mark H. on 4/24/2015

    The pinouts for the Apex controller I/O is pretty easy but these boxes are well made and save a finding the cable and making them. I am setting up my system with a bunch of float switches and control points to let the controller alert me when there are problems. The breakout box is an easy short cut. It should be included with each module that needs it but I think the manufacturer realizes most people will buy it and it gives them a little more margin. From everything I have seen from Neptune Systems and their user community (zombie that means you) I am not going to complain. They do good work and a lot of people rely on them.


Ask a question

Product Questions

Will the reefkeeper float switch work with the neptune apex breakout box. from the pics it looks like the reefkeeper floats have no ends just bare wires. Thanks
Question by: AARON on Mar 29, 2014 6:48:00 AM
Hey Aaron,
They sure will. The RK comes with two pieces of wire, one has a 2 pin plug on it and bare leads on the other, the other is the float switch with bare wires. When used with there equipment you connect the two together after the float switch is secured to the bracket. In your case you would just toss that pigtail with the 2 pin connector and use the float switch with the bare wires.
Answer by: Bulk Reef Supply on Mar 29, 2014 6:48:00 AM
which apex controllers is this compatible with? jr? lite?

Question by: jonathan on Jan 4, 2014 2:09:00 AM
Hi Jonathan,
The I/O breakout box is compatible with all versions of the Apex so long as you have an available I/O port. On the regular Apex this is a port that is built into the head unit, if you have a different version, or have used up the port, you may need to add an additional module to give yourself a free I/O port to plug the breakout box into.
Answer by: Bulk Reef Supply on Jan 4, 2014 2:09:00 AM
What's the size of the box?
Question by: Jeremy on Jun 22, 2017 8:31:00 AM
Hey Jeremy,
The breakout box measures: 3.8" x 2.1"
Answer by: Jason Smith (Admin) on Jun 22, 2017 11:08:00 AM
How far away from the Break out box can probes be? Following the recommended wire-gauge, could the Break out box work with 20 feet of cabling? 50 feet? 100 feet? Have a ATO system in my garage about 20 feet directly away 50 worst case through the walls that I'd love to set up float switches to get emails about when I'm running low on RODI water, etc. I scoured Google and couldn't find anything. Would love to know if you guys know or could even possibly test it?!?!?! :-p
Question by: Kyle Rogers on May 14, 2016 10:14:00 PM
Great question!
They can be used well over 50 feet from the source with thicker gauge wire. Neptune has informed us that some customers have taken an ethernet cable wires apart and used the wires to run well over 50'. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on May 19, 2016 2:55:00 PM
Hibiscus am interested in purchasing a Neptune slim leak detector and was wondering if this module is what I need to control that. My apex jr should be delivered any day now but I would love to add a leak detector asap. Thanks
Question by: Javin on May 24, 2017 2:45:00 AM
For leak detection probes, you will need either the ALD module or FMM module. Each has its own probe options with different plugs depending on the module you use. If we can be of further assistance, please let us know!

Have a great day!
Answer by: Zack (Admin) on May 30, 2017 4:01:00 PM
Does this item work with the "New" Apex 2016 system?

Question by: Jeffrey Stevens on Nov 22, 2016 7:40:00 AM
Great question! This is still compatible with the New Neptune Apex, and is necessary for incorporating various NO/NC switches. :-)
Answer by: Randy (Admin) on Nov 22, 2016 2:39:00 PM
What does this connect to? Will it connect to the energy bar or does it have to connect to the head unit?
Question by: dan on Jul 12, 2014 6:31:00 AM
Hi Dan,
It depends on which apex unit you have. If you have a full apex system it will connect to the "I/O" port on the head unit. If you need to add more then one, or have an Apex Jr, then you would need to pick up a probe module 1 or probe module 2 which will give you additional I/O ports.
Answer by: Bulk Reef Supply on Jul 12, 2014 6:31:00 AM