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ADAM-4051-BE 16-ch Isolated Digital Input Module with Modbus

  • 16 digital input channels
  • Digital input for dry contact or wet contact
  • Input Voltage level: 10~50V
  • Over voltage protection: 70 Vdc
  • 2,500 Vdc optical isolation
Certifications CE

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More Description

The ADAM-4051 is a 16-ch. Digital Input Module, built with 2500 VDC optical isolation, suitable for critical applications. Different from other modules, the ADAM-4051 accepts 10~50V input voltage to fit various digital signals, such as 12 VDC, 24 VDC, 48 VDC. Moreover, users can read the current status from the LED indications on the front panel.

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Extended Specifications


  • Protocol ASCII command, Modbus/RTU
  • Connectors 2 x 13-pin plug-in screw terminal


  • Interface RS-485

Isolated Digital Input

  • Channels 16
  • Input Voltage Dry Contact Logic level 1: close to DGND Logic level 0: open Wet Contact Logic level 1: 10~50 VDC Logic level 0: 0~3 VDC


  • Operating Temperature -10~70 °C (14~158 °F)
  • Isolation Voltage 2500 VDC

Power Requirements

  • Input Voltage 10~30 VDC
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