M31-XFXX0800G 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]：185±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.
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| silk screen | name | illustrate |
| AI1+ | AI1 analog input+ | AI1 analog input + interface, used in conjunction with AI1- |
| AI1- | AI1 analog input- | AI1 analog input-interface, used with AI1+ |
| AI2+ | AI2 analog input+ | AI2 analog input + interface, used in conjunction with AI2- |
| AI2- | AI2 analog input - | AI2 analog input-interface, used with AI2+ |
| AI3+ | AI3 analog input+ | AI3 analog input + interface, used in conjunction with AI3- |
| AI3- | AI3 analog input- | AI3 analog input-interface, used with AI3+ |
| AI4+ | AI4 analog input+ | AI4 analog input + interface, used in conjunction with AI4- |
| AI4- | AI4 analog input- | AI4 analog input-interface, used with AI4+ |
| AI5+ | AI5 analog input+ | AI5 analog input + interface, used in conjunction with AI5- |
| AI5- | AI5 analog input- | AI5 analog input-interface, used with AI5+ |
| AI6+ | AI6 analog input+ | AI6 analog input + interface, used in conjunction with AI6- |
| AI6- | AI6 analog input- | AI6 analog input-interface, used with AI6+ |
| AI7+ | AI7 analog input+ | AI7 analog input + interface, used in conjunction with AI7- |
| AI7- | AI7 analog input- | AI7 analog input-interface, used with AI7+ |
| AI8+ | AI8 analog input+ | AI8 analog input + interface, used in conjunction with AI8- |
| AI8- | AI8 analog input- | AI8 analog input-interface, used with AI8+ |
| VO+ | hanging in the air | No effect, access is not allowed |
| VO+ | hanging in the air | No effect, access is not allowed |
| VO- | hanging in the air | No effect, access is not allowed |
| Reload | Factory reset/auto-negotiation | Press and hold for 5-10 seconds to restore factory settings; double-click within 2 seconds to automatically negotiate the expansion module |
| A(RS485) | RS485 A interface | RS485 A interface |
| B(RS485) | RS485 B interface | RS485 B interface |
| G(RS485) | RS485G interface | RS485G interface |
| ON | ground | ground |
| V-(DC9-36V) | Negative pole of power supply | DC (9-36V) power supply negative interface |
| V+（DC9-36V） | Positive power supply | DC (9-36V) power supply positive interface |
| LAN1 | Network port | Standard RJ45 network cable interface |