Description
The I-87005W module is used for measuring temperature using a thermistor. The module supports a wide range of thermistors, and features individual channel configuration, which means that eight of the input channels can be individually configured for different kinds of thermistor. The board also supports user-defined thermistor types, which can be added by specifying the Steinhart coefficients.
Additionally, the I-87005W also provides 8 digital output channels that can be used for alarm output.
The inclusion of 3000 VDC intra-module isolation and overvoltage protection for the thermistors on the I-87005W ensures that the module operates at a higher reliability.
Features
- Thermistor Input
- Individual Channel Configuration
- Open Wire Detection
- 8-channel Digital Output for Alarm Output
- 3000 VDC Intra-module Isolation
- Overvoltage Protection for Thermistor Input
- User-defined Thermistor Types
- RoHS Compliant
- Wide Operating Temperature Range: -25 ~ +75°C
Specifications
I/O specifications
| Thermistor Input | |
| Channels | 8 |
| Wiring | 2 Wires |
| Sensor Type |
Precon ST-A3, Fenwell U, YSI L100, YSI L300, YSI L1000, YSI B2252, YSI B3000, YSI B5000, YSI B6000, YSI B10000, YSI H10000, YSI H30000, User-defined |
| Resolution | 16-bit |
| Accuracy | ±0.1% of FSR |
| Sampling Rate | 8 Hz (Total) |
| Zero Drift | ±0.5 μV/°C |
| Span Drift | ±25 ppm/°C |
| Common Mode Rejection | 113 dB |
| Normal Mode Rejection | 100 dB |
| Input Impedance | >1 MΩ |
| Individual Channel Configuration | Yes |
| Resistance Measurement | 200 kΩ |
| Open Wire Detection | Yes |
| Overvoltage Protection | 120 VDC/110 VAC |
| Digital Output | |
| Output Channels | 8 |
| Output Type | Isolated Open-collector |
| Maximum Load Current | 700 mA/Channel |
| Load Voltage | +5 ~ +50 VDC |
| Safe Value | Yes |
| Power-on Value | Yes |
System Specifications
| Communication | |
| Interface | RS-485 |
| Format | N, 8, 1 |
| Baud Rate | 1200 ~ 115200 bps |
| Protocol | DCON |
| Dual Watchdog | Yes, Module (1.6 Seconds), Communication (Programmable) |
| LED Indicators/Display | |
| System LED Indicator | 1 LED as Power/Communication Indicator |
| I/O LED Indicator | 16 LEDs as High/Low Alarm Signals |
| 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 | |