DFRobot 8-Channel Isolated Analog Data Acquisition Module

DFRobot 8-Channel Isolated Analog Data Acquisition Module is a single-end 12-bit analog data acquisition module with an accuracy of up to ±1%. This module supports 0V to 5V, 1V to 5V, and 0V to 2.5V voltage ranges as well as 0mA to 20mA, and 4mA to 20mA current ranges. The 8-channel isolated analog data acquisition module can collect multiple channels simultaneously and can also collect voltage and current at the same time. This module features an RS485 communication interface that has optoelectronic isolation and the application layer adopts the standard Modbus RTU protocol that conforms to industrial standards. The channels of this module are independent that can set the range independently. This module supports standard 2-wire, 3-wire, sensor inputs in addition to standard 4-wire sensor inputs.

The 8-channel isolated analog data acquisition module features extremely guaranteed security and the interface adopts an anti-reverse design. This module features communication isolation and input/output isolation so that it can resist interference and ensure accurate and stable data transmission during use. This also ensures that it will only burn out the collection product at most and the entire system will not be damaged in case of a strong electricity supply. The module operates at the 12V to 30V supply voltage range and -40℃ to 80℃ temperature range. 

The 8-channel isolated analog data acquisition module offers 1% collection accuracy, 12 bits resolution, and 1200bps to the 115200bps baud rate. This module is ideal for rapid networking, build a monitoring system, connect with PLC, configuration software, industrial personal computer, OPC, and other systems.

Features

  • RS485 communication interface
  • Power protection:
    • Power reverse protection
  • Input type:
    • Voltage input and current input
  • Range setting:
    • Each channel can independently configure the range
  • Watchdog:
    • Software watchdog
  • RS485 transmission rate:
    • Maximum 180 times/second (total channel of a single module and in the case of 115200bps)
    • Maximum 24 times/second (total channel of a single module and in the case of 9600bps)
    • Maximum 3 times/second (total channel of a single module and in the case of 1200bps)

Specifications

  • 12VDC to 30VDC power supply voltage range
  • Power consumption:
    • Rated value 0.5W @24VDC
  • -40℃ to 80℃ operating temperature range 
  • -40°C to 85℃ storage temperature range
  • Acquisition range:
    • 0V to 5V, 1V to 5V, 0V to 2.5V, 0mA to 20mA, 4mA to 20mA, and the default factory value is 4mA to 20mA
  • 1400sps (total channel) and 50sps (single channel) sampling rate
  • 12 bits resolution
  • 1% collection accuracy
  • Input impedance:
    • 10MΩ voltage range
    • 249Ω current range
  • 1500VDC isolation voltage
  • 1200bps to 115200bps baud rate

Two-wire Current Signal Wiring Diagram

Schematic - DFRobot 8-Channel Isolated Analog Data Acquisition Module

Three-wire Voltage Signal Wiring Diagram

Schematic - DFRobot 8-Channel Isolated Analog Data Acquisition Module

DFRobot 8-Channel Isolated Analog Data Acquisition Module