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AXDIO128CO: Discrete I/O with CANopen

The Discrete I/O Module reads 12 discrete inputs and sets 8 Form C relay outputs while networking with other CAN devices (CANopen) in a machine or engine control system. The unit is a battery powered device with the ability to withstand engine cranking, reverse polarity and transient power conditions. Outputs can be controlled by any input or CAN message. A bi-color LED indicates operational status.

The AXDIO128CO has a number of setpoints that allow the user to configure it for their application. User programmable functionality uses SDO object access, per CiA DS-301 with commercially available CANopen® tools. Settings are saved to non-volatile memory upon command. The setpoints can also be saved to a file and flashed into other AXDIO128CO modules over the CAN bus. A SAE J1939 model is available.

Model AX031801 is a new alternative.

Model AX031851 has the same functionality but offers a compact enclosure.


  • Power Generator Sets
  • Diesel Engine Control Systems
Technical Specifications:Discrete I/O with CANopen
Order Code:P/N: AXDIO128CO
P/N: AX031801
P/N: AX031851
Power:12V or 24VDC nominal
9…32 VDC power supply range
Inputs:Reads twelve (12) discrete inputs (active low with pull-up resistors)
o Low-Level input voltage: 0 to 0.8 V
o High-Level input voltage: 3.75 to +BAT
o Inputs have internal pull-up resistors
o Input resistance: more than 5 kOhms
o The inputs have internal over and under voltage protection
Outputs:Sets 8 Form C relay outputs.
Resistive load:
o 2A NO)/2 A (NC) at 277 VAC
o 2 A (NO)/2 A (NC) at 125 VAC
o 2 A (NO)/2 A (NC) at 30 VDC
Control Logic:Standard embedded control logic is provided.
User programmable functionality uses SDO object access, per CiA DS-301 with commercially available CANopen® tools. An EDS File is provided.
Communications:1 CAN 2.0B port, protocol CANopen
Enclosure:Rugged aluminum housing, stainless steel end plates, neoprene gaskets
145.30 x 149.00 x 73.00 mm (5.72 x 5.86 x 2.87”) L x W x H (models AXDIO128CO and AX031801)

Compact enclosure (model AX031851)
Protection Rating:IP67, Pollution Degree 3 rating per UL508
Operating Conditions:-40 to 85°C (-40 to 185°F)
Compliance:o UL508 (April 2010) (FTPM2) – Controls for Stationary Engine Driven Assemblies and cUL C22.2 No. 14-10 (2010)
o CE marking for the EMC and RoHS Directives
o Marine Type Approvals
PDF Datasheet: Click icon for PDF datasheet for AXDIO128CO.
Click icon for PDF datasheet for AX031801.
Click icon for PDF datasheet for AX031851.

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