4-port DS18B20 Digital Temperature Sensor Module with Daisy-Chain Wiring


4-port DS18B20 Digital Temperature Sensor Module with Daisy-Chain Wiring


  1. 4-Port DS18B20 Sensor Input Module
  2. 2/3-wire DS18B20 Wire Connection
  3. Max 20 Sensors per Port
  4. Max. Distance of 100 m per Port when using Daisy-Chain Wiring
  5. Measures Temperatures from -55 to +125°C
  6. ±0.5°C Accuracy from -10 to +85°C
  7. 4 kV ESD Protection
  8. 3000 VDC Intra-module Isolation, Field to Logic


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 module 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


  • CA-TP1-M100-L020
  • CA-TP1-M200-L020
  • Power Supply

CPU Module
Watchdog Timer Yes, Module (1.6 Seconds), Communication (Programmable)
Intra-module Isolation 3000 VDC
EMS Protection
EFT (IEC 61000-4-4) ±4 kV for Power
ESD (IEC 61000-4-2) ±4 kV Contact for each Terminal
±8 kV Air for Random Point
Surge (IEC 61000-4-5) ±2 kV for power liner
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 (See Note 1)
Sampling Rate 1 Hz
Individual Channel Configuration -
COM Ports
Ports 1 x RS-485
Baud Rate 1200 to 115200 bps
Data Format N81, N82, E81, O81
Protocol DCON Modbus/RTU
Reverse Polarity Protection Yes
Input Range +10 ~ +48 VDC
Consumption 0.5 W
Dimensions (mm) 123 x 72 x 35 (W x L x H)
Installation DIN-Rail
Operating Temperature -25 ~ +75 °C
Storage Temperature -30 ~ +80 °C
Humidity 10 ~ 90% RH, Non-condensing
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