[Specifications]：2DI+2AI+4DO
[DI channels]：2-way
[AI channels]：2-way
[DO channels]：4-way
[Installation method]：DIN-Rail Mounting
[Size]：121*72*34mm
[Product weight]：150 ±5 g
| Name | Parameter |
|---|---|
| Operating voltage | DC 8～28V |
| Power indicator | Blue LED indication |
| Communication Interface | RJ45, RS485 |
| Baud rate | 9600bps (customizable) |
| Protocol | Modbus TCP, Modbus RTU |
| Device address | TModify via Modbus command and computer |
| DI channels | 2 |
| Input type | Default dry node |
| Acquisition frequency | 1 kHz |
| Input indicator | LED display |
| AI channels | 2 |
| Acquisition characteristics | Single-ended input |
| Input type | 0-20mA, 4-20mA |
| AI resolution | 1‰ |
| Acquisition frequency | 10Hz |
| Input instructions | LED display |
| DO channel | 4 |
| DO output type | Type A Relay |
| DO output mode | Level output, pulse output |
| Relay contact capacity | 30V/7A、250V/7A |
| Output indication | Red LED |
| Product Size | 121mm * 72mm * 34mm (Length*width*height) |
| product weight | 150 ± 5 g |
| Working temperature and humidity | -40 ～ +85℃、5% ～ 95%RH(No condensation) |
| Storage temperature and humidity | -40 ～ +105℃、5% ～ 95%RH(No condensation) |
| Installation method | DIN rail installation |
Practical Application Scenarios
1. Industrial Pump Station Automation
In water supply or sewage pumping stations, this module monitors liquid level sensors (via AI channels) and float switches (via DI channels). If levels become critical, the controller triggers the relay outputs (DO channels) to activate pumps or emergency alarms, ensuring full automated closed-loop management without manual intervention.
2. Remote Energy Consumption Management
The ME31-AAAX2240 integrates with industrial smart meters to monitor analog current loads. By utilizing its gateway functionality, it transmits data to a central SCADA system. Maintenance teams can remotely toggle heavy electrical equipment via the relay outputs to manage peak loads and ensure facility safety from a central control room.
3. Distributed Environmental Monitoring
For smart factories, this module collects data from environmental sensors (like CO2 or humidity transmitters outputting 4-20mA signals). It enables local control of ventilation fans and exhaust systems through its relay outputs, allowing for an autonomous environmental response system that adapts in real-time to factory floor conditions.
FAQ Section
1. What does it mean for the module to act as a "simple Modbus gateway"?
This device can automatically forward Modbus commands from a master controller to secondary slave devices connected to its serial port. This allows your central system to communicate with multiple downstream slave devices through this single module, effectively extending your existing network infrastructure without needing additional hubs.
2. Are the digital inputs compatible with common industrial sensors?
Yes, the 2 dry contact inputs are designed for standard industrial switches, push-buttons, and relay status signals. They provide a high level of isolation and stability, making them compatible with almost all standard binary output sensors used in factory automation.
3. How do I switch between 0-20mA and 4-20mA modes for analog inputs?
The module supports these input ranges through software configuration. By modifying the Modbus registers, users can select the desired analog range to match their specific sensors, ensuring accurate conversion and data acquisition across different industrial instrumentation.
