M-2004
4-port Digital Temperature Sensor Module with Daisy-Chain Wiring. Communicates over Modbus RTU. Supports up to 20 sensors per port. Communicates up to 100 meters per port.
Features
ICP DAS USA’s 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.
- 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
Applications
- Temperature Measurement
- Environment Monitoring
- Tunnel Monitoring
- Building Monitoring
Specifications
System Specifications
Communication Interface
Interface
RS-485
Bias Resistor
Yes, 1kΩ 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
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
Note :1 ±0.5°C Accuracy from -10°C to +85°C