The Modbus TCP remote I/O module, based on Ethernet and the Modbus TCP protocol, enables remote data interaction between field devices and host computers. Its core advantages are strong compatibility, convenient deployment, and adaptability to multiple scenarios, making it a fundamental component for industrial automation and IoT remote control.
I. Core Functions
1. Cross-Network Data Interaction: Acquires digital/analog signals from sensors and uploads them to PLCs and configuration software; receives control commands to drive actuators; overcomes distance limitations by leveraging Ethernet.
2. Multi-Protocol Compatibility: Natively supports Modbus TCP, partially compatible with Modbus RTU and MQTT, and can interface with mainstream industrial control equipment and cloud platforms.
3. Stable Protection: Features electrical isolation, ESD protection, electromagnetic interference resistance, wide temperature and voltage design, and adaptability to complex industrial environments.
4. Convenient Operation and Maintenance Management: Supports web/software parameter configuration, includes status indicator lights, and some modules include fault diagnosis, ensuring efficient operation and maintenance.
II. Key Selection Considerations
Protocol and Compatibility: Confirm support for the Modbus TCP core protocol, ensuring compatibility with host computers (e.g., Siemens, Inovance PLCs) and configuration software (WinCC, KingSCADA).
IO Channel Configuration: Select digital (DI/DO, dry/wet contacts) and analog (AI/AO, voltage/current signals) signals according to requirements, specifying the number and type of points.
Industrial Environment Adaptability: Prioritize wide-temperature range (40℃~85℃), high protection level, and isolation protection to adapt to environments with strong electromagnetic interference and harsh conditions.
Expansion and Installation: Consider whether it supports module cascading expansion, whether it is DIN35 rail mounting, and whether it can adapt to on-site wiring and system upgrade requirements.
III. Ebyte Core Model Recommendations
1. Main Unit Module (Core Compatibility)
M31-XAXA0404G: 4AI+4AO mixed signal main unit, supports Modbus TCP/RTU dual protocols, RJ45+RS485 dual interfaces, a single main unit can connect to 16 expansion modules, adaptable to multi-signal acquisition and control scenarios. AI accuracy reaches 1‰ (differential input), DO is relay output, supports 5A high load, the shell has a three-proof coating, moisture-proof and salt spray-proof.
2. Expansion Module (Flexible Expansion)
GXAXA0404: 4AI+4AO expansion module, requires M31 series main unit, supports single-ended/differential input, AO output 020mA/420mA, wide voltage 9~36VDC power supply, DIN rail + positioning hole dual mounting, adaptable to signal point expansion needs.
IV. Typical Application Scenarios
Industrial Automation: Signal acquisition of production line equipment, remote control of motors/solenoid valves, replacing local IO and reducing wiring. IoT Monitoring: Connects to temperature, humidity, and gas sensors, remotely uploads data to the cloud platform, and enables environmental monitoring and early warning.
Building Automation: Controls access control, lighting, and air conditioning equipment, collects operational status data, and improves building management efficiency.
Energy and Power: Collects signals from power distribution equipment, remotely manages switching devices, and ensures stable operation of the power system.
Do you need me to provide precise combinations and wiring suggestions for the Ebyte modules based on your specific I/O point types and quantities?