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M-2004 - 4-port Digital Temperature Sensor Module with Daisy-Chain Wiring. Communicates over Modbus RTU.
by ICP DAS
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M-2004_SUMMARY.html
- 4-Port DS18B20 Sensor Input Module
- 2/3-wire DS18B20 Wire Connection
- Max 20 Sensors per Port
- Max. Distance of 100 m per Port when using Daisy-Chain Wiring
- Measures Temperatures from -55 to +125C
- ±0.5C Accuracy from -10 to +85C
- 4 kV ESD Protection
- 3000 VDC Intra-module Isolation, Field to Logic
- RoHS Compliant
- Wide Operating Temperature Range: -25 to +75C
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M-2004_DESCRIPTION.html
ICP DAS USAs M-2004 is a digital temperature sensor module that provides four ports for 2- or 3 wire DS8B20 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 measuring range between -55 and +125°C. Up to 20 DS18B20 sensors can be connected to each port on the M-2004 module in a daisy-chain arrangement with a maximum wiring distance of 100 meters. The M-2004 module is fully RoHS compliant, and features 4 kV ESD protection as well as 3000 VDC intra-module isolation.
M-2004.html
System Specifications
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Interface
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RS-485
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Bias Resistor
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Yes, 1kΩ bias resistor by switch selectable
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Format
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N81, N82, E81, O81
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Baud Rate
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1200 to 115200 bps
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Protocol
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Modbus RTU, DCON
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Dual Watchdog
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Yes, Module (1.6 Seconds), Communication (Programmable)
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System LED Indicator
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Yes, 1 as Power/Communication Indicator
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I/O LED Indicators
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-
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Intra-module Isolated, Field-to-Logic
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3000 VDC
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ESD (IEC 61000-4-2)
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±4 kV Contact for each Terminal
±8 kV Air for Random Point
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EFT (IEC 61000-4-4)
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±4 kV for Power
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Surge (IEC 61000-4-5)
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±2 kV for power liner
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Reverse Polarity Protection
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Yes
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Input Voltage Range
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+10 ~ +48 VDC
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Power Consumption
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0.5 W
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Dimensions (L x W x H)
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110 x 33 x 96 mm
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Installation
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DIN-Rail
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Operating Temperature
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-25C to +75C
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Storage Temperature
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-30C to +80C
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Relative Humidity
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10 ~ 95% RH, Non-condensing
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I/O Specifications
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Port
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4
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Wiring
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2-wire or 3-wire
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Resolution
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DS18B20
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Temperature Measurement Range
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-55C to +125C
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Resolution
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12-bit
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Accuracy
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±0.5C (See Note 1)
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Sampling Rate
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1 Hz
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Number of Sensors per Port
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20
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Sensor Wiring Length
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Max. 100 m per Port
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Note :1 ±0.5C Accuracy from -10C to +85C
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