Data Acquisition


  • 4-Port DS18B20 Sensor Input Module                               
  • Up to 20 Sensors per Port
  • Up to 100 Meters per Port when Using Daisy-Chain Wiring
  • 2/3-wire DS18B20 Wire Connection


The M-7004 is a digital temperature sensor module that provides four ports for 2- or 3-wire DS18B20 digital temperature sensor input. The DS18B20 temperature sensor has a high accuracy of ±0.5°C when measuring temperatures between -10 and + 85°C, with a total measurement range of between -55 and +125°C. Up to 20 DS18B20 sensors can be connected to each port on the M-7004 module in a daisy-chain arrangement with a maximum wiring distance of 100 meters. The M-7004 is fully RoHS compliant and features 4 kV ESD protection as well as 3000 VDC intra-module isolation.



• Temperature Measurement
• Environment Monitoring
• Tunnel Monitoring
• Building Monitoring



CPU Module
Watchdog Timer Module, Communication (Programmable)


Intra-module Isolation 3000 VDC


EMS Protection
EFT (IEC 61000-4-4) ±4 kV for Power Line
ESD (IEC 61000-4-2) ±4 kV Contact for Each Terminal
Surge (IEC 61000-4-5) ±0.5 kV for Power Line


LED Indicators
Status 1 x Power and Communication


Temperature Measurement
Range -55 °C ~ +125 °C


Analog Input
Channels 4
Sensor Type DS18B20
Sensors per Ports 20
Sensor Wiring Cables Length Max. 100 m per Port
Resolution 12-bit
Accuracy ±0.5 °C (*Note 1)
Sampling Rate 1 Hz


COM Ports
Ports 1 x RS-485
Baud Rate 1200 ~ 115200 bps
Data Format (N, 8, 1), (N, 8, 2), (E, 8, 1), or (O, 8, 1)
Protocol Modbus RTU, DCON


Reverse Polarity Protection Yes
Input Range +10 ~ +30 VDC
Consumption 1.0 W


Dimensions (mm) 72 x 123 x 35 (W x L x H)
Installation DIN-Rail Mounting


Operating Temperature -25 ~ +75 °C
Storage Temperature -30 ~ +80 °C
Humidity 10 ~ 90% RH, Non-condensing




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