M31-XXXA0008G Distributed Remote IO Module for Analog and Digital Signal Acquisition, Supporting Standard Modbus Protocol, Freely Configurable and Easily Expandable.
[Communication interface]：RJ45, RS485
[Working voltage]：DC 9~36V
[Product weight]： 170±5g
[Introduction]：The M31 series distributed IO host supports Modbus TCP and RTU protocols, allows up to 5 clients to access simultaneously, and is compatible with function codes 01, 02, 03, 04, 05, 06, 15, and 16. Its expandable design enables the connection of up to 16 IO expansion modules as needed, eliminating the need to purchase a complete system. This reduces costs while facilitating easy integration into existing site environments. The device includes built-in status diagnostics for real-time monitoring of IO module communication status.
| category | name | parameter |
| power supply | Working voltage | DC 9～36V |
| Power indicator | PWR red LED indicator light | |
| communication | Communication interface | RJ45、RS485 |
| baud rate | 9600bps (optional) | |
| Communication protocol | Standard Modbus TCP, Modbus RTU protocol | |
| MODBUS | Device address | Can be modified through Modbus instructions, host computer and hardware dialing |
| DI input | input type | NPN、PNP |
| input voltage | 12~24V | |
| Input impedance | 7.2kΩ | |
| Collection frequency | Max 1K Hz | |
| Input instructions | DI green LED indicator light | |
| AI input | Collection characteristics | Single-ended input/differential input (model optional) |
| input type | Single-ended current: 0-20mA, 4-20mA Differential current: 0-20mA, 4-20mA, ±20mA Differential voltage: 0-5V, ±5V, 0-10V, ±10V |
|
| AI resolution | 16 bits (differential)/12 bits (single-ended) | |
| AI accuracy | 1‰(differential)/3‰(single-ended) | |
| Collection frequency | Single-ended maximum 100Hz/differential maximum 40Hz | |
| Input instructions | AI green LED indicator light | |
| DO output | DO output type | Type A relay (normally open) |
| DO output mode | Level output | |
| Relay contact capacity | 5A 30VDC, 5A 250VAC (the total current of the same COM public terminal supports a maximum of 8A) | |
| Output instructions | DO green LED indicator light | |
| AO output | Output type | 0-20mA、4-20mA |
| AO output accuracy | 3‰ | |
| Input instructions | AO green LED indicator light | |
| other | Product size | 110mm * 40mm * 100mm (length*width*height) |
| Working temperature and humidity | -40～+85℃, 5%～95%RH (no condensation) | |
| Storage temperature and humidity | -40 ~ +105℃, 5% ~ 95%RH (no condensation) | |
| Installation method | Positioning holes and guide rail installation | |
| Basic parameters | Modbus address | 1 |
| baud rate | 9600bps (8 options available) | |
| Check digit | None (default), Odd, Even | |
| data bits | 8 | |
| Stop bit | 1 | |
| DI filter parameters | 6 | |
| AI filter parameters | 6 | |
| Network parameters | working mode | TCP server (up to 5 clients access) |
| DHCP | closure | |
| Gateway address | 192.168.3.1 | |
| subnet mask | 255.255.255.0 | |
| Local IP | 192.168.3.7 | |
| native port | 502 | |
| Target IP | 192.168.3.3 | |
| target port | 502 | |
| DNS server | 114.114.114.114 | |
| Native MAC | Determined by chip (fixed) |
