The Ebyte ME31-XDXX0800-485 is a PT100 thermal resistor temperature acquisition module with 8-channel PT100 temperature acquisition function, supports RS485 communication interface, supports Modbus RTU standard protocol for acquisition, and can communicate with PC, configuration, PLC and other networks.
| Parameter Item | Specification | Remarks |
|---|---|---|
| Model Number | ME31-XDXX0800-485 | 8-channel PT100 RS485 temperature collector |
| Supported Sensor | 2-wire PT100 RTD | Platinum resistance temperature probe |
| Collection Channel Quantity | 8 independent channels | Simultaneous multi-point temperature reading |
| ADC Resolution | 16-bit high precision ADC | Factory calibrated before delivery |
| Temperature Resolution | 0.1 Celsius | Fine-grained data output |
| Temperature Accuracy | ±0.2% plus 2 Celsius (25 Celsius ambient) ±0.5% plus 2 Celsius (-40~85 Celsius) |
Stable industrial measurement performance |
| Sampling Frequency | 1Hz fixed cycle collection | Real-time periodic data refresh |
| Communication Interface | RS485 differential serial port | Anti-interference long-distance wiring |
| Supported Protocol | Standard Modbus RTU | Universal industrial bus protocol |
| Baud Rate Range | 1200bps ~ 115200bps, default 9600bps | Configurable via Modbus command |
| Supply Voltage Range | DC 8V ~ 28V | Compatible with 12V/24V industrial power supply |
| Operating Temperature | -40 Celsius ~ +85 Celsius | Full industrial grade wide temperature |
| Humidity Tolerance | 5%RH ~ 95%RH no condensation | Three-proof conformal coating: anti-fungal, anti-humidity, anti-salt spray |
| Installation Mode | DIN rail mount / screw fixed mount | Standard cabinet layout friendly |
| Module Dimension | 121mm * 72mm * 34mm | Compact industrial enclosure |
| Net Weight | 140g | Light weight for cabinet deployment |
Manual Download
User Manual
Configuration tool
Company Proflile
| Category | Name | Parameters |
| power supply | Working voltage | DC8～28V |
| Power indicator | Blue LED indication | |
| communication | Communication interface | RS485 |
| Baud rate | 1200~115200bps (default 9600) | |
| Communication protocol | Standard Modbus RTU protocol | |
| MODBUS | Device address | Can be modified through Modbus instructions and host computer |
| Temperature collection | Number of channels | 8-way |
| Sensor type | 2-wire PT100 temperature sensor | |
| Temperature resolution | 0.1℃ | |
| Accuracy | Normal temperature (25±5℃) condition: ±0.2%±2℃ | |
| Full temperature (-40~85℃) condition: ±0.5%±2℃ | ||
| Acquisition frequency | 1Hz | |
| other | Product size | 121mm * 72mm * 34mm (length * width * height) |
| Product weight | 140 ±5 g | |
| Working temperature and humidity | -40 ～ +85℃, 5% ～ 95%RH (no condensation) | |
| Installation method | Guide rail installation, screw installation | |
| Serial port parameters | Baud rate | 9600bps (8 types) |
| Verification method | None | |
| Data bit | 8 | |
| Stop bit | 1 | |
| MODBUS Parameters | Modbus master-slave | Slave |
| Address | 1 |
Practical Application Scenarios
1. European Food Processing Factory Temperature Monitoring System
Deploy ME31-XDXX0800-485 modules inside oven, fermentation tank and cold storage cabinets of food production lines, matching 2-wire PT100 probes to capture multi-point internal temperature. Multiple modules support RS485 cascade expansion to collect temperature data of dozens of production equipment, upload temperature values to Siemens PLC and touch HMI via Modbus RTU. The three-proof anti-salt spray shell adapts humid food workshop environment, ensures continuous stable temperature recording for food safety compliance inspection.
2. Southeast Asian Solar Energy Power Station Cabinet Thermal Monitoring
Install this 8-channel PT100 collector inside photovoltaic combiner boxes and energy storage battery cabinets, use PT100 sensors to monitor surface temperature of battery packs and power inverters. DC 8~28V wide voltage fits solar off-grid power supply, DIN rail mounting saves cabinet space, RS485 bus transmits temperature data to Ebyte 4G DTU, then wirelessly synchronizes temperature alarm data to cloud monitoring platform for overheat risk early warning of power equipment.
3. North American Chemical Plant Pipeline & Reactor Temperature Collection
Connect ME31-XDXX0800-485 with PT100 probes attached to chemical reaction kettles and transmission pipelines, realize 8-point simultaneous temperature measurement for each module. The -40 to +85 Celsius wide temperature range adapts outdoor chemical pipeline environment, Modbus RTU data seamlessly connects Delta PLC and industrial configuration software, supports long-distance RS485 wiring between workshop central control room and on-site reactors without signal attenuation.
4. Australian Greenhouse Precision Agriculture Temperature Control
Mount the temperature acquisition module in agricultural intelligent control cabinets, lay PT100 sensors in crop canopy, soil layers and greenhouse ventilation ducts to collect multi-zone ambient temperature. RS485 cascade function connects dozens of ME31 modules to form large-area greenhouse temperature sensing network, collected temperature data transmits to industrial host computer to automatically adjust fan, water curtain and heating equipment for constant temperature planting management.
5. Middle East Refrigerated Logistics Container Real-Time Temperature Tracking
Equip refrigerated transport containers with ME31-XDXX0800-485 modules, PT100 probes monitor cargo compartment multi-position temperature in real time. Compact size fits limited container control box space, anti-humidity conformal coating resists high humidity inside cold storage, RS485 port links Ebyte LoRa wireless modules to upload container temperature data to logistics cloud platform, meeting cold chain food temperature traceability regulatory requirements.
FAQ Section
1. Can ME31-XDXX0800-485 connect to multiple PLC brands simultaneously?
This collector adopts standard Modbus RTU slave protocol, fully compatible with mainstream industrial PLC brands including Siemens, Mitsubishi, Delta, Omron and Schneider. Engineers only need to set matching Modbus address and baud rate to finish communication connection without custom driver development.
2. What maximum quantity of ME31 modules can be cascaded on one RS485 bus?
The RS485 bus supports up to 32 ME31-XDXX0800-485 modules for cascade expansion under standard wiring conditions. Users can add RS485 signal repeaters if more temperature acquisition nodes are required to extend bus transmission distance and node capacity.
3. Does this module support 3-wire or 4-wire PT100 temperature sensors?
ME31-XDXX0800-485 only supports 2-wire PT100 RTD probes. For projects requiring 3-wire or 4-wire high precision PT100 measurement, customers can select Ebyte ME31-XDXX0400 Ethernet version multi-channel temperature acquisition module as alternative model.
4. How to modify Modbus device address and serial baud rate of ME31 module?
Users can download Ebyte official PC configuration tool from product page, connect computer with module via RS485 to send Modbus configuration commands, freely adjust device address, baud rate and temperature upload parameters without extra hardware tools.
5. What protection performance does the three-proof conformal coating provide for industrial harsh environments?
The module PCB board is coated with special three-proof paint, delivering anti-fungal, anti-humidity and anti-salt spray protection. It effectively avoids circuit corrosion, short circuit and measurement drift caused by moisture, salt fog and mold in coastal, chemical and food workshop industrial scenes.
