A-1012 RS485 and USB Modbus Multifunction IO Unit -2DI, 4AI, 2DO, 2AO

A-1012 RS485 and USB Modbus Multifunction IO Unit -2DI, 4AI, 2DO, 2AO
Our Price:  £94.80(£113.76 Inc. VAT)
Add USB Programming Lead:  

Analogue Inputs:  2
Analogue Outputs:  2
Digital Inputs:  2
Digital Outputs:  2



13 in stock, immediate despatch

A-1012 is a RS485 and USB remote IO unit with 2 digital inputs, 2 analogue Inputs (0/4 to 20 mA), 2 PT100 temperature Inputs, 2 transistor digital outputs and 2 analogue outputs. The unit supports both Modbus RTU and Modbus ASCII protocols. The USB port can be used for configuration or can be used as the main communication interface, installing as a virtual serial port: no external power is required when connected to USB. Featuring a robust industrial construction with the use of optical isolators to prevent ground loop effects and limits damages from power surges.

Special Offer:  Discounts of 7%, 10%, 12.5% and 15% are available when you order 10, 25, 50 and 100 items or more of this product.

  • 2 x Digital Inputs (with opto Isolation)
  • 2 x Digital Outputs: (Souce Transistor rated 1A @ 10-35VDC)
  • 2 x Analogue input Type: 0-20mA, 4-20mA
  • ADC Resolution: 16-bit
  • 2 x PT-100/PT1000
  • Temperature Ranges: (PT-100:-200~+600°C), (PT-1000:-200~+600°C)
  • 2 x Analogue Outputs: (12-bit)
  • Analogue Outputs Type: 0-20mA, 4 -20mA
  • Input Impedance:
    • Current: 100 Ω
    • RTD : 10 MΩ
  • Input Accuracy: ±0.1%
  • Sampling Rate: 10 sample/second (total)
  • CMR @ 50/60 Hz: 120 dB
  • LED indication of IO status
  • Output state pre-settable on Comms fail
  • Output state pre-settable on power-up
  • Input/Output Operating Frequency: 10HZ
  • Interface:
    • RS485
    • USB - installs as a virtual serial port
  • Protocol - Modbus RTU or Modbus ASCII
  • Communication Baud Rate: 1200~115200bps
  • Isolation Voltage: 5000 V DC
  • Surge , EFT And ESD Protection
  • Operating Temperature: - 20 to 75º C
  • Power:
    • 10 to 30VDC, 24VAC (RS485)
    • via USB port
  • Panel or DIN Rail mount
  • Dimensions - 72mm x 118mm x 39mm
Included Software

The unit is configured using the free Utility Software. This can be used to set the units' IP address and to set the input ranges and monitor inputs.


Optional Software


DAQFactory is a low cost data acquisition and control software for SCADA, Factory Automation, HMI and Test and Measurement applications. DAQFactory provides all the tools needed to acquire data, log it, share it on a network, display it on the screen, graph it, analyse it, and automate your project. DAQFactory can communicate with just about any serial or Ethernet device using Modbus RTU, ASCII or Modbus/ TCP. It also supports a wide variety of DAQ devices including LabJack USB devices and many other DAQ cards.

More Information >>



User Manual >>

Quick Start Guide >>

Utility Software >>

USB Driver >>

Customer Reviews
Average Rating (3 Reviews):  
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Great little device
24 February 2022  |  Patrick

Just as I expected, operates perfectly. I will definitely use them again.

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Superb Pre-Sales & Admin Support
04 February 2021  |  Michael

I cannot stop myself buying items from AUDON. I used to use two otherw ell known suppliers, who are both good. But I recently bought a few things from AUDON. I am "hooked". Definitely my preferred supplier. Superb technical help in pre-sales, and very friendly help with the admin. Thanks, Mike

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IoT Solutions Architect
04 May 2020  |  Lawrence

This is very comprehensive device. With onboard analog scaling. The quick start guide should include details on how to power extenaly. Will be using and specifying these in the future.

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