Type:Logic ICs
Condition:New
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I. Product Overview
l High-precision single-channel DC-type0-20mA /4-20mACurrentOutput ,Using an independent 16 industrial-grade DA output chip
l Using RS485 MODBUS RTU standard communication , networking and configuration software can be , PLC, industrial touch screen , etc.
l With communication 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 1 channel analog output channels
l Analog output range DC-type 0-20mA / 4-20mA
l Analog Output Accuracy ± 0.01mA
l Analog output steady drift ± 3ppm /
l Maximum output load 1050Ω (24V power supply )
l Operating temperature range -20 ~ 70
l External power supply DC 9V ~ 30V / 2W
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 | Analog ground , then the negative side of the external power input |
| Iout + | Current output positive terminal |
| AGnd | Analog ground , then the current output negative terminal |
| NC | Air terminal , do not take |
| NC | Air terminal , do not take |
| NC | Air terminal , do not take |
| 485B | RS485Signal B- |
| 485A | RS485Signal A + |
| DGnd | Digital ground , which can be accessed RS485 communication cable shields as needed |
Four analog output diagram
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 |
2Analog output signal control command
Send : 01 06 00 00 2C 3955 18 ( cases / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 01 | 1 | Module address | Address range 01-FE |
| 06 | 1 | Function Code | 06-Write single register |
| 0000 | 2 | Register number (4x type ) | 0000-Current output channel |
| 2C39 | 2 | Write data | Current output data range 0000-4E20 |
| 5518 | 2 | CRCChecksum | All the data in front of the CRC |
Reception : 01 06 00 00 2C 39 55 18 ( cases / 16 hex )
This command is issued to an address 01 represents a module command , control the module output current , written data "2C39" hexadecimal , converted to decimal 11321 , on behalf of the current output is calculated : Iout = DATA / 1000 = 11321 / 1000≈11.32mAWhen 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
3Analog output signal acquisition command :
Send : 01 03 00 00 00 01 84 0A ( case / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 01 | 1 | Module address | Address range 01-FE |
| 03 | 1 | Function Code | 03-Read register |
| 0000 | 2 | Register Address (4x type ) | 0000-Analog output starting register address |
| 0001 | 2 | Read length | 0001-Read a register |
| 840A | 2 | CRCChecksum | All the data in front of the CRC |
Reception : 01 03 02 2C 39 64 96 ( cases / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 01 | 1 | Module address | Address range 01-FE |
| 03 | 1 | Function Code | 03-Read register |
| 02 | 1 | Bytes | 02Read two bytes in length |
| 2C39 | 2 | Read data | 2C39-Read analog output channel data |
| 6496 | 2 | CRCChecksum | All the data in front of the CRC |
Receive instructions explained the current analog output channel current output data "2C39", converted into decimal number 11321 , on behalf of the formula:
Iout = DATA / 1000 = 11321/1000≈11.32mA
4,Module address setting command :
Send: 0,006,006,400,010,804 ( case / 16 hex )
| Data | Bytes | Data Description | Remarks |
| 00 | 1 | Module address | 00-Bulk Address |
| 06 | 1 | |
