| Technical Parameter | MA01-AACX2220 Specification | Remarks / Details |
|---|---|---|
| Product Category | Modbus RTU Remote I/O Network Module | Serial data acquisition and remote relay control |
| I/O Channel Configuration | 2DI + 2AI + 2DO | 2 Digital Inputs, 2 Analog Inputs, 2 Relay Outputs |
| Communication Interface | RS485 Bus | Supports standard Modbus RTU protocol commands |
| Installation Method | Positioning Hole Mounting | Secured inside control cabinets and equipment chassis |
| Enclosure Dimensions | 80 x 50 x 30 mm | Compact footprint for space-constrained integration |
| Product Weight | 80 g (plus or minus 5 g) | Lightweight construction for embedded industrial control |
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Practical Application Scenarios
1. Smart Greenhouse Environmental Monitoring and Automated Ventilation Control
In modern agricultural automation, growers need to read analog sensor values and drive physical actuators. The MA01-AACX2220 collects analog signals (AI) from 4-20mA or 0-10V temperature and humidity transmitters while acquiring dry contact status (DI) from limit switches on motorized window vents. Connected to an Ebyte DTU (such as the E810 or E840 series) via RS485, the telemetry is sent to a central SCADA system, which triggers the MA01-AACX2220 relay outputs (DO) to open or close exhaust fans and irrigation solenoids automatically.
2. Distributed Pumping Station Monitoring and Local Interlock Control
Water treatment facilities require distributed monitoring of tank levels and pump statuses over long distances. The MA01-AACX2220 uses its 2 analog inputs (AI) to continuously monitor liquid pressure sensors and ultrasonic level transmitters, while its 2 digital inputs (DI) detect high-water alarm floats. Integrating with an Ebyte LoRa serial gateway (like the E90-DTU series), field data is relayed to the central control panel, allowing PLCs or HMIs to issue Modbus commands that activate the 2 relay outputs (DO) to trigger backup pumps or sound local warning buzzers.
3. Factory Equipment Retrofitting with Touch Panel Display Interfaces
Legacy factory machinery often lacks direct network connectivity to modern Human-Machine Interfaces (HMIs) or host PLCs. Machine integrators mount the MA01-AACX2220 inside equipment electrical enclosures using its 80x50x30mm compact form factor. The module collects machinery running signals (DI) and motor vibration sensor metrics (AI), communicating via RS485 directly to industrial touchscreens or host PLCs using standard Modbus RTU, while driving 2 local relay channels (DO) for emergency safety shutoffs.
FAQ Section
1. What Modbus protocol function codes are supported by the MA01-AACX2220 for register polling?
The MA01-AACX2220 fully complies with standard Modbus RTU communication protocols over its RS485 bus. It supports standard Modbus function codes including Function 02 (Read Discrete Inputs for DI), Function 03/04 (Read Holding/Input Registers for AI data), and Function 05/06/0F/10 (Write Single or Multiple Coils/Registers for controlling DO relay channels), ensuring plug-and-play integration with PLCs, HMIs, and configuration software.
2. How are the 2-channel analog inputs (AI) hardware-configured for current vs voltage sensors?
The module's 2-channel analog input stage is designed to interface with industry-standard sensor outputs such as 0-20mA / 4-20mA current loops or 0-5V / 0-10V voltage signals. Hardware engineers can switch the input mode via internal jumpers or software configuration settings to match connected pressure transmitters, temperature probes, or gas sensors.
3. Can multiple MA01-AACX2220 modules be daisy-chained on a single RS485 bus?
Yes, multiple MA01-AACX2220 modules can be connected in a multi-drop daisy-chain configuration on the same RS485 bus line. Each module features configurable Modbus slave addresses (typically from 1 to 247) and adjustable baud rates via configuration software, allowing a single host PLC, industrial PC, or Ebyte cellular/LoRa gateway to poll dozens of distributed I/O channels over two wires.
