[Introduction]:The M31 series distributed IO host supports Modbus TCP protocol and Modbus RTU protocol for acquisition control. The device supports simultaneous access by 5 clients and supports function codes 01/02/03/04/05/06/15/16. The product adopts an scalable design in structure. During use, if the user finds that the current device has some functions When the needs cannot be met, you can select the corresponding IO expansion modules according to the missing functions and splice them together to achieve the functions. There is no need to purchase the whole machine. This saves costs and facilitates customers to access the current on-site environment; the modules are self-contained. With status diagnosis function, it can monitor the communication status of IO modules in real time; it can support a maximum of 16 IO expansion modules.
| Symbol | name | Function Description |
| DI1 | Dll switch input | Dll switch input interface, used in conjunction with COMA |
| DI2 | DI2 switch input | DI2 switch input interface, used in conjunction with COMA |
| DI3 | DI3 switch input | DI3 switch input interface, used in conjunction with COMA |
| DI4 | DI4 switch input | DI4 switch input interface, used in conjunction with COMA |
| COMA | DI switch input common terminal | DI1-DI4 share the COMA common port |
| DI5 | DIS switch input | DI5 switch input interface, used in conjunction with COMB |
| DI6 | DI6 switch input | DI6 switch input interface, used in conjunction with COMB |
| DI7 | DI7 switch input | DI7 switch input interface, used in conjunction with COMB |
| DIS | DIS switch input | DI8 switch input interface, used in conjunction with COMB |
| COMB | DI switch input common terminal | DI5-DI8 share the COMB common terminal |
| DI9 | DI9 switch input | DI9 switch input interface, used in conjunction with COIC |
| DUO | DUO switch input | DI10 switch input interface, used in conjunction with CONIC |
| DIll | DIll switch input | DIll switching input interface, used in conjunction with CONIC |
| DI12 | DI12 switch input | DI12 switch input interface, used in conjunction with CONIC |
| DI13 | DI13 switch input | DI13 switch input interface, used in conjunction with COMC |
| DI14 | DI 14 switch input | DI 14 switch input interface, used in conjunction with COMC |
| DI15 | DI15 switch input | Dll 5 switch input interface, used in conjunction with COMC |
| DI16 | DI16 switch input | DI16 switch input interface, used in conjunction with COMC |
| COMC | DI switch input common terminal | DI9-DI16 share the COMC common terminal |
| Reload | Factory reset auto-negotiation | Press and hold for 5-10 seconds to restore factor}- 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 |
| PE | ground | ground |
| V-(DC9-36V) | Negative pole of power supply | DC (9-36V) power supply negative interface |
| V+ (DC9-36V) | Positive pole of pcwer supply | DC (9-36V) power supply positive interface |
| LAN1 | Network port | Standard RJ45 network cable interface |