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E830-DTU(2R2-433L)-V8 RS485 switch remote control supports 2 isolated switch inputs and 2 relay outputs standard MODBUS RTU protocol
[Introduction]：E830-DTU (2R2-433L) is a remote control product with switch follow and control acquisition functions. It supports 2 isolated switch inputs and 2 relay outputs. The communication interface adopts RS-485 interface (only used in configuration mode ); the wireless acquisition function supports the standard MODBUS RTU protocol. This product is highly easy to use and can be widely used in signal acquisition, monitoring and control of industrial field equipment.
| Pin number | Name | Function | Description |
| 1 | DI1 | Switch input channel 1 | 1 channel of switching value acquisition, optocoupler isolation |
| 2 | COM1 | Switch input channel 1 | The common terminal of input channel 1 is internally connected to the module ground. |
| 3 | DI2 | Switch input channel 2 | 2 channels of switching value acquisition, optocoupler isolation |
| 4 | COM2 | Switch input channel 2 | The common end of input channel 2 is internally connected to the module ground. |
| 5 | RESET | reset button | In acquisition mode, you can press and hold the soft button for 5 seconds to reset the Modbus address to the default address 01. |
| 6 | 485_A | RS-485 interface A | RS-485 interface A is connected to the device A interface and is only used to configure parameters. |
| 7 | 485_B | RS-485 interface B | RS-485 interface B is connected to the device B interface and is only used to configure parameters. |
| 8 | GND | Pressed wire power input negative pole | Power reference ground |
| 9 | VCC | Pressed line power input positive pole | Power input terminal, range: DC8-28V, recommended 12V, 24V |
| 10 | PWR/ACK | Power/ACK indicator light | Two-color light, blue light is the power indicator light, always on when power is on, green light is the ACK indicator light |
| 11 | D1 | Input/output indicator light | Bi-color light, when DI1 has an input signal, the blue light turns on; when relay 1 has action, the green light turns on |
| 12 | D2 | Input/output indicator light | Bi-color light, when DI2 has an input signal, the blue light turns on; when relay 2 has action, the green light turns on |
| 13 | ANT | Wireless module antenna interface | 433M antenna interface |
| 14 | M1 | DIP switch 1 | M0/M1 dialing determines the working mode |
| 15 | M0 | DIP switch 0 | M0/M1 dialing determines the working mode |
| 16 | COM2 | Relay output channel 2 | Relay 2 output common terminal |
| 17 | NO2 | Relay output channel 2 | Relay 2 output normally open |
| 18 | COM1 | Relay output channel 1 | Relay 1 output common terminal |
| 19 | NO1 | Relay output channel 1 | Relay 1 output is normally open |