Support Document

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Jun 13, 2022

IOX-TACHOGRAPH (Discontinued)

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The IOX-TACHOGRAPH allows the Geotab® GO™ device to read real-time data from the Tachograph and send it to MyGeotab™.

Top Features

  • Monitors one-switch input Automatic driver ID that matches the individual driver with the specific vehicle, improving report accuracy.
  • Uses MyGeotab exception rules to send real-time tachograph error notifications.
  • Detects tachograph malfunction by comparing GO device data and tachograph data.

IOX Specifications and Installation

Hardware Technical Specifications


88 g


Overall length: 3910 mm L

Widest point: 36 mm W × 16 mm H


Black, moisture-resistant thermoplastic overmold


CAN: 500 kbps (for daisy chaining)


Input Impedance: 37 kΩ

Driving Circuit Resistance must be less than 100 Ω

Power Output

Daisy Chaining: 2500 mA @ 12 V/24 V

Current Rating

Operating Mode: 30 mA

Sleep Mode: 0.4 mA

Temperature Rating

–40 ℃ to +85 ℃


1 x 2-PIN Connector (male)

1 x 2-PIN Connector (female)

1 x 8-PIN Tachograph connector (male)

1 x 8-PIN Tachograph connector (female)

Keyed 5-pin mini-USB type-B plug (Daisy chain power and CAN in)

Keyed 5-pin mini-USB type-B socket (Daisy chain power and CAN out)


Keyed mini-USB plug connects to the GO Device or another IOX™ harness

Compatible Firmware

GO7®, GO7 Rugged, GO8®, GO8 Rugged, GO9®: firmware xxx.25.10 or newer

Installation Instructions

NOTE: Professional Installation Required — Installation of the IOX-TACHOGRAPH requires the installer have sufficient technical knowledge and expertise for mobile device installation and integration into modern vehicles, i.e. Certified Geotab® Installer certification or equivalent.

WARNING! Prior to IOX-TACHOGRAPH installation, read and follow GO device installation instructions ( to verify any existing GO device installation is correct in preparation for IOX-TACHOGRAPH installation. Incorrect installation of either the GO device, and/or IOX-TACHOGRAPH can result in loss of vehicle control and serious injury.

WARNING! Prior to IOX-TACHOGRAPH installation, read and follow important safety information including limitations of use located following these installation instructions. Always read and follow all safety information to prevent loss of vehicle control and serious injury.


Unplug the GO device from the vehicle and remove the expansion port cover on your GO device.


Plug in the 90° USB connector from the IOX to the GO device. Secure the USB connector using a zip tie. Please note that over tightening the zip tie may damage the USB connector.

NOTE: The USB connector must be inserted in the orientation displayed in the image.


For safety reasons, turn off the vehicle and unplug any existing connections from Port C and Port D on the Tachograph unit.

NOTE: If you are simultaneously installing the uReader Kit, please see the uReader Installation Guide and dedicated sections of this document.


Connect the BROWN 8-PIN male connector on the IOX-TACHOGRAPH to Port D on the Tachograph unit. Then, connect the BROWN 8-PIN female connector on the IOX-TACHOGRAPH to the existing connector removed from the Tachograph unit in Step 3.


After the IOX-TACHOGRAPH is connected, connect the GO device and immediately start the vehicle. The GO device will enter debug mode.

Check the vehicle’s dashboard to ensure there are no errors or lights that were not illuminated prior to installation.


Navigate to to verify that the device is communicating. In the space provided, enter your name, the company name, and the Geotab GO device serial number — found at the bottom of the device. Click Log Install.


After you click Log Install, the web page displays the current status of your device — in GREEN or RED text. If the device is communicating, the status is displayed in GREEN text with the last valid GPS record. If the device is not communicating, the status is displayed in RED text and you must verify the installation.

Termination Shunt

The IOX comes with a termination shunt installed in the expansion port. If you plan to install more than one IOX in a daisy chain, you must remove the shunt from each device in the line, with the exception of the last IOX connected. The shunt must remain in the last IOX and secured with a zip tie.

The shunt in the last IOX ensures the GO device detects and configures the IOX, as effectively as possible.

NOTE: Failure to install the shunt in the last IOX may affect IOX communication. To ensure the IOX communicates, please secure the shunt with a zip tie.

Important Safety Information and Limitations of Use

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WARNING! Do not attempt to install, configure or remove any product from any vehicle while the vehicle is in motion or otherwise in operation. All installation, configuration or removal must be done only in stationary vehicles which are securely parked. Attempting to service units while being operated could result in malfunctions or accidents, leading to death or serious personal injury.

WARNING! All in-vehicle devices and related cabling must be securely fastened and kept clear of all vehicle controls, including gas, brake, and clutch pedals. You must inspect devices and cabling on a regular basis to ensure all devices and cabling continue to be securely attached. Loose cabling or devices may impede the use of vehicle controls, resulting in unanticipated acceleration, braking or other loss of vehicle control, which could lead to death or serious personal injury. Improperly fastened in-vehicle devices may detach and impact operators upon sudden acceleration or deceleration, which may cause injury.

WARNING! If at any point after an in-vehicle device is installed a warning light illuminates on the vehicle dash or the vehicle stalls or has a marked drop in performance, shut off the engine, remove the device, and contact your reseller. Continuing to operate a vehicle with these symptoms can cause loss of vehicle control, and serious injury.

WARNING! Your in-vehicle devices must be kept clear of debris, water, and other environmental contaminants. Failure to do so may result in units malfunctioning or short-circuiting, that can lead to a fire hazard or vehicle damage or serious injury.

WARNING! Do not attempt to remove the devices from the vehicle in which they are originally installed for installation in another vehicle. Not all vehicles share compatibility, and doing so may result in unexpected interactions with your vehicle, including sudden loss of power or shutdown of the vehicle’s engine while in operation or cause your vehicle to operate poorly or erratically and cause death or serious injury and/or vehicle damage.

NOTICE — This product does not contain any user-serviceable parts. Configuration, servicing, and repairs must only be made by an authorized reseller or installer. Unauthorized servicing of these products will void your product warranty.