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. The shell adopts three-proof coating, which is Anti-Fungal, Anti-Humidity, and Anti-Salt Spray. 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 |