M-2004 CR ICP DAS Digital IO Modules

• 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 +125°C
• ±0.5°C Accuracy from -10 to +85°C
• 4 kV ESD Protection
• 3000 VDC Intra-module Isolation, Field to Logic
• RoHS Compliant
• Wide Operating Temperature Range: -25 to +75°C

INTRODUCTION

The 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 total measurement range of 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.

APPLICATIONS

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

I/O SPECIFICATIONS

Analog Input
Port: 4
Wiring: 2-wire or 3-wire
Resolution: DS18B20
Temperature Measurement Range: -55°C to +125°C
Resolution: 12-bit
Accuracy: ±0.5°C (See Note 1)
Sampling Rate: 1 Hz
Number of Sensors per Port: 20
Sensor Wiring Length: Max. 100 m per Port
 
Communication Interface
Interface: RS-485
Bias Resistor: Yes, 1k Ω bias resistor by switch selectable
Format: N81, N82, E81, O81
Baud Rate: 1200 to 115200 bps
Protocol: Modbus RTU, DCON
Dual Watchdog: Yes, Module (1.6 Seconds), Communication (Programmable)
 
LED Indicators/Display
System LED Indicator: Yes, 1 as Power/Communication Indicator
I/O LED Indicators: -
 
Isolation
Intra-module Isolated, Field-to-Logic: 3000 VDC
 
EMS Protection
ESD (IEC 61000-4-2): ±4 kV Contact for each Terminal

±8 kV Air for Random Point
 
EFT (IEC 61000-4-4): ±4 kV for Power
Surge (IEC 61000-4-5): ±2 kV for power liner
 
Power
Reverse Polarity Protection: Yes
Input Voltage Range: +10 ~ +48 VDC
Power Consumption: 0.5 W
 
Mechanical
Dimensions (L x W x H): 110 x 33 x 96 mm
Installation: DIN-Rail
 
Environment
Operating Temperature: -25°C to +75°C
Storage Temperature: -30°C to +80°C
Relative Humidity: 10 ~ 95% RH, Non-condensing