Type:Logic ICs
Condition:New
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I. Product Overview
l 8Opto-isolated digital inputs and four relay outputs ( SPST normally open SPST-1 )
l Using RS485 MODBUS RTU standard communication , networking and configuration software can be , PLC, industrial touch screen , etc.
l With communication and input and output status indicator
l Communication circuit lightning , anti-jamming design
l Signal acquisition and control can be widely used in industrial field devices
l Normal use of three-year warranty
Second, the main parameters
l 8 digital input channels (active low )
l Relay outputChannel4 (SPST SPST)
l Relay contact capacity 2A / 250VAC 2A / 30VDC
l Operating temperature range -20 ~70
l External power supply DC 9V ~ 30V /5W
l 1500VDC isolation protection
l Standard DIN mounting rail or screw mounting
l Dimensions 125 × 73 × 35mm
Third, the interface definition
| AVcc | The positive terminal of the external power input |
| AGnd | Negative external power input terminal |
| RY1A | 1 relay output normally open contact A |
| RY1B | 1 relay output normally open contacts B |
| RY2A | The first two relay outputs normally open contact A |
| RY2B | The first two relay outputs normally open contacts B |
| RY3A | 3 relay outputs normally open contact A |
| RY3B | 3 relay outputs normally open contacts B |
| RY4A | 4 relay outputs normally open contact A |
| RY4B | 4 relay outputs normally open contacts B |
| DI_01 | The first digital inputs |
| DI_02 | The first two digital inputs |
| DI_03 | The first three digital inputs |
| DI_04 | 4 digital inputs |
| DI_05 | 5 digital inputs |
| DI_06 | 6 digital inputs |
| DI_07 | The first seven digital inputs |
| DI_08 | The first eight digital inputs |
| 485A | RS485Signal A + |
| 485B | RS485Signal B- |
Fourth, Digital / Relay application diagram
1, Digital input application
2Relay output applications
Five , communications instructions
1,Communication Parameters ( factory default ): 9600, N, 8,1
| Parameters | Description |
| 9600 | Baud Rate |
| N (No parity ) | Parity bit |
| 8 | Data bits |
| 1 | Stop bits |
2, Digital input signal acquisition command :
Send:01 02 00 00 00 08 79 CC( Example / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 01 | 1 | Module address | Address range 01-FE |
| 02 | 1 | Function Code | 02Read input bits |
| 0000 | 2 | Enter the address (1x type ) | 0000-Input bit starting address |
| 0008 | 2 | Read input bit length | 0008-Reads eight input bits |
| 79CC | 2 | CRCChecksum | All the data in front of the CRC |
Receive:01 02 01 C220 19( Example / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 01 | 1 | Module address | Address range 01-FE |
| 02 | 1 | Function Code | 02Read input bits |
| 01 | 1 | Bytes | 01-Read one byte length |
| C2 | 1 | Read data | C2-Reads the input bit status |
| 2019 | 2 | CRCChecksum | All the data in front of the CRC |
Data read "C2", is converted into a binary number " 11000010 " , from left to right correspond to the state of 8 digital input signals DI_08-DI_01 , that DI_08, DI_07, DI_02 input , no input other channels
3, Relay output signal control commands ( multiple control ) :
Send:01 0F 00 00 00 04 01 037E 97( Example / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 01 | 1 | Module address | Address range 01-FE |
| 0F | 1 | Function Code | 0F-Write multiple coils |
| 0000 | 2 | Coil address (0x type ) | 0000-Coil start address |
| 0004 | 2 | Write coil length | 0004-W 4 coils |
| 01 | 1 | Write data byte | 01-Writes a byte of data |
| 03 | 1 | Write data | 03-Write a status output of the coil 4 |
| 7E97 | 2 | CRCChecksum | All the data in front of the CRC |
Reception : 01 0F 00 00 00 04 54 08 ( cases / 16 hex )
Written data "03 " is converted into a binary number " 00000011 ", only after four valid , from left to right correspond to four relay outputs signals RY4-RY1 state , namely RY2, RY1 with output, no other channel output , the module receives the correct command , make the appropriate action based on the command and response command sent back to the host , indicating successful communication
4, Relay output signal control commands ( individual control ) :
Send:01 05 00 00 FF 00 8C 3A( Example / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 01 | 1 | Module address | Address range 01-FE |
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