Module 4 kênh đầu vào nhiệt độ với DS18B20 Daisy-Chain ICP DAS I-87004W
Features
- 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 I-87004W 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 I-87004W module in a daisy-chain arrangement with a maximum wiring distance of 100 meters. The I-87004W 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
System Specifications
| Communication | |
| Interface | RS-485 |
| Format | N81, N82, E81, O81 |
| Baud Rate | 1200 to 115200 bps |
| Protocol | 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 Indicator | – |
| Isolation | |
| Intra-module Isolation, Field-to-Logic | 3000 VDC |
| EMS Protection | |
| ESD (IEC 61000-4-2) | ±4 kV Contact for each Terminal |
| ±8 kV Air for Random Point | |
| Power | |
| Power Consumption | 0.5 W Max. |
| Mechanical | |
| Dimensions (L × W × H) | 115 mm x 30 mm x 102 mm |
| Environment | |
| Operating Temperature | -25 to +75°C |
| Storage Temperature | -30 to +80°C |
| Humidity | 10 to 90% RH, Non-condensing |
I/O Specifications
| Temperature Measurement | |
| Port | 4 |
| Wiring | 2-wire or 3-wire |
| Sensor Type | 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 only applies for measurements between -10°C and +85°C
Ordering information
| I-87004W CR | 4-Port Digital Temperature Sensor Module with Daisy-Chain Wiring (RoHS) |
Accessories
| SG-770 CR | 7-channel Differential or 14-channel Single-ended Surge Protector (RoHS) |