Geotab IOX-AUXM: What It Does, Specs and Uses

What Is the IOX-AUXM?

A GPS device knows where a truck is and what the engine is doing. It does not know whether the dump body is raised, the beacon is flashing or the rear door is open. The IOX-AUXM fills that gap. It is an IOX expansion module with four auxiliary inputs that connect to switched circuits on the vehicle, so the GO device can log each one as on or off with a time and location.

Each input is wired to a circuit that changes state when the equipment operates. A second IOX-AUXM can be added to the first for eight inputs in total, with the second unit reporting as Aux 5 to 8.

The IOX-AUXM as a schematic, including the red and black loop that sets a second unit to Aux 5 to 8.

What Does the IOX-AUXM Do?

Four digital inputs per unit. Each input reports on or off, color coded blue, orange, green and white for Aux 1 to 4.
Self-learning triggers. During setup the module learns each circuit's off and on states, so it works with ground-switched, voltage-switched and open-circuit style signals.
Expands to eight inputs. A second unit plugs into the first and reports as Aux 5 to 8. Geotab supports two per GO device.
Feeds rules and reports. Input events land in MyGeotab, where they can drive exception rules, notifications and usage reports.
Input inversion. If a circuit reads opposite to what the fleet expects, the value can be inverted per input in the vehicle's settings.
Manual configuration. Self-learning can be replaced with custom parameters that set the circuit type for each input.

What Do Fleets Use the IOX-AUXM For?

Geotab publishes a standard input map by vocation, and following it keeps data consistent across a fleet. Examples from that map:

Telecom and utility trucks. Beacon, boom or bucket, outriggers, and PTO or auxiliary engine. Fleets use this to separate real work time from idle time on the same truck.
Emergency vehicles. Primary lights, secondary lights, panic or gun lock, and siren, which gives police, fire and EMS a record of when lights and siren were in use.
School buses. Red and amber overhead warning lights, door open, and lift door open.
Public works. Left and right gutter brooms, dump box up and PTO, useful for proving street sweeping and material hauling.
Winter operations. On a second unit, belly plow or spreader, front plow, wing plow, and tow plow or beacon, so plow routes show where blades were actually down.
Hi-rail and heavy service. PTO, hi-rail gear, crane and compressor on the first unit; generator, welder, tool circuit and panic on the second.
Security and cargo. Door lock and panic inputs, and Geotab's marketplace also lists door open and close monitoring and driver panic buttons.

Each input watches one switched circuit on the truck, and the module behind the dash reports every change.

What Are the IOX-AUXM's Key Specifications?

Spec	Detail
Inputs	4 per unit (Aux 1 to 4); 8 with a second unit (Aux 5 to 8)
Circuit types	Ground to float, ground to driven, float to driven, auto-detected
Logic thresholds	Low below 100 mV; high above 3.3 V (driven circuits)
Input impedance	30.3 kΩ or 80.6 kΩ depending on voltage range
Circuit limits	Driving circuit resistance under 100 Ω; capacitive load under 200 pF; common ground required
Input voltage	12 V / 24 V nominal
Current draw	40 mA typical, 100 mA maximum operating; 0.4 mA sleep
Input connector	Molex 8-pin, 43020-0800
Overall length	1140 mm; leads reach about 3.5 ft from the GO device
Weight	46 g
Operating temperature	-40 °C to +85 °C
Compatibility	GO7 and newer; Base, Pro, ProPlus and Regulatory plans

What Should Installers Know About the IOX-AUXM?

Geotab requires a certified or equally qualified installer for this module, and most of the work is finding the right wire. Each input needs a circuit that cleanly changes state with the equipment, shares ground with the IOX, and meets the resistance and capacitance limits. The leads reach roughly three and a half feet from the GO device, so a PTO switch at the back of a cab often needs an extension. Self-learning has to start with every input in its off state. With the GO device in debug mode, each input is cycled on and off one at a time, and the device beeps the input number for both changes. If the beeps never come, Geotab's guidance is to unplug the GO device for about a minute and try again. For a second unit, the red and black loop is cut before it goes into the chain so it reports as Aux 5 to 8, and only the last IOX keeps its termination shunt.

Who Is the IOX-AUXM Right For, and Who Should Choose Something Else?

The IOX-AUXM fits any vocational fleet that needs to prove when equipment ran: utilities, municipalities, emergency services, school transport, public works and construction. It is an input device only. If the goal is to switch something on the vehicle from MyGeotab, such as a light or a buzzer, the IOX-OUTPUTM is the right module. If the equipment sends data such as temperatures or weights rather than a simple on and off, look at the IOX-RS232 or IOX-CAN.

What Are Common Questions About the IOX-AUXM?

Can it tell us how long the PTO ran?

Yes, as long as the input is wired to a circuit that changes with PTO engagement. Each on and off event is logged, and MyGeotab rules and reports can be built from those events.

What if the input shows on when the equipment is off?

The input can be inverted in the asset's IOX and auxiliaries settings. If the circuit type itself was learned wrong, the learning step is repeated or the type is set manually.

Do we have to follow Geotab's input map?

Geotab calls it mandatory for consistent fleet data, and we follow it so reports line up across every vehicle. We can supply and install the modules and wire each input to the matching circuit.

API Signal supplies IOX-AUXM modules and wires each input on site at your yard, following Geotab's input map so every truck reports the same way. Call 803-513-1009 or request pricing through Get a Quote.

Sources: Geotab IOX-AUXM support document; Geotab IOX-AUXM input mapping guide; Geotab Marketplace IOX-AUXM listing. GEOTAB is a registered trademark of Geotab Inc. API Signal is an independent installer and is not Geotab.

Every Geotab Product →Trackers, cameras, asset trackers and IOX add-ons. Get a Quote →The IOX-AUXM supplied and installed on one written quote.

Geotab IOX-AUXM