Remote I/O Modules

Ebyte Remote I/O Products Selection Guide

1. Product Line Overview & Screening Logic

2. Detailed Parameter Comparison Tables

Table 1: MA01 Series – Entry-level RS485 Modbus RTU Remote I/O

Table 2: ME31 Series – Compact Specialized Remote I/O

Table 3: M31 Series – High-performance Distributed Remote I/O

3.1 Modbus TCP/RTU Version

3.2 Industrial Bus Versions

3.3 LoRa Wireless Distributed I/O

Table 4: Wireless Remote Synchronous I/O (Signal Remote Transmission)

3. Quick Selection Steps

1. Confirm bus protocol: Match the PLC/host system communication interface first.
2. Count I/O points: Calculate the required number of DI, DO, AI, AO and temperature channels.
3. Select wired or wireless: Choose wired for stable and high-speed scenarios; choose LoRa for long-distance wiring-free scenarios; choose 4G for cross-regional scenarios.
4. Select host or expansion: For systems with more than 16 points, use M31 host + expansion modules to reduce cost.
5. Verify environmental requirements: For harsh sites, prioritize models with triple-proof coating and wide voltage supply.

Applications

• Smart Factory Automation: The M31 series distributed I/O (supporting Modbus, Profinet, EtherCAT fieldbuses) connects sensors and solenoid valves directly at production workstations, achieving ≤1ms bus synchronization. Its DIN-rail splice design allows flexible I/O expansion with production upgrades, and adapts to high-interference workshop environments.
• Energy Management: Combined with ME31 temperature acquisition modules and MA01 digital I/O modules, it realizes busbar temperature monitoring, switch status collection and energy consumption statistics in distribution rooms. The standard Modbus protocol is compatible with mainstream energy management systems, reducing wiring and construction costs for multi-point acquisition.
• Remote Environmental Telemetry: M31 LoRa wireless I/O or E860-DTU 4G remote I/O enables wiring-free deployment in field hydrology and meteorology monitoring sites without wired networks. The LoRa version delivers 10km line-of-sight transmission, while the 4G version has no distance limit; both feature wide temperature range and low power design for solar power supply.
• Building Automation: MA01 series serial I/O modules can be deployed floor by floor to integrate lighting, access control and fire signals into the building control system. For old building renovation, LoRa wireless I/O avoids cross-wall wiring and greatly shortens the construction period.
• PLC Extension: The full range of remote I/O supports mainstream protocols including Profinet and Modbus TCP/RTU, and is directly compatible with Siemens, Mitsubishi and other mainstream PLCs. It flexibly expands digital, analog and temperature channels at a much lower cost than original brand expansion modules, with no need to replace the PLC host.