[Interface de communication]：RS485
[Tension de fonctionnement]：DC 5~24V
[Système de positionnement]：BDS
[Dimensions]：103*28*28.5mm
[Introduction]：The EWD108-GN03B(485) satellite positioning terminal supports the BDS satellite positioning system and features fast response and accurate positioning. The device outputs positioning information via the Modbus RTU protocol, supporting the output of RMC-ASCII strings conforming to the NMEA0183 protocol and separate registers for storage (longitude, longitude direction, latitude, latitude direction, etc.). The serial port baud rate can reach up to 115200bps and can be easily modified via the Modbus RTU protocol. The product is coated with a conformal coating, providing anti-mildew, anti-moisture, and anti-salt spray functions.
Magasin officiel| serial Number | project | Specification |
| 1 | power supply voltage | 5V~24V DC |
| 2 | Communication interface | RS485 |
| 3 | baud rate range | 1200-115200bps |
| 4 | Communication Protocol | Modbus RTU |
| 5 | Supported positioning systems | BDS |
| 6 | Operating frequency band | BDS:B1I,B1C,B2I,B3I,B2a,B2b |
| 7 | Location update rate | 1Hz~10Hz |
| 8 | User Configuration | Modify registers via Modbus RTU, reboot for the changes to take effect. |
| 9 | Antenna Interface | SMA (External Threaded Internal Hole) |
| 10 | Hardware interface | 4-pin 3.81mm Phoenix terminal |
| 11 | Size | 103×28×28.5mm（L×W×H） |
| 12 | Average weight | 32±5g |
| 13 | Operating temperature | -40 ℃ ~ +85℃, industrial grade |
| 14 | Operating humidity | 10% ~ 90% relative humidity, non-condensing |
| category | Indicator Item | Typical value | unit |
| Positioning time (Test Condition 1) | cold start | ≤32 | S |
| warm start | ≤1 | S | |
| Recapture | ≤1 | S | |
| Sensitivity (Test Condition 2) | cold start | -148 | dBm |
| warm start | -156 | dBm | |
| Recapture | -160 | dBm | |
| track | -162 | dBm | |
| accuracy (Test condition 3) | Horizontal positioning accuracy | ＜2.5 | m |
| Speed positioning accuracy | ＜0.1 | m/s | |
| Time accuracy | 30 | ns | |
| Power consumption (Test condition 4) | Capture Current | 30 | m.a. |
| Tracking current | 20 | m.a. | |
| Operating temperature | - | -40℃-85℃ | - |
| Storage temperature | - | -55℃-100℃ | - |
| humidity | - | 5%-95%RH (non-condensing) | - |
[Note]: The above results are for GPS/BeiDou dual-mode operation.
[Test Condition 1]: The number of satellites received is greater than 6, the signal strength of all satellites is -130dBm, the average value is taken after 10 tests, and the positioning error is less than 10 meters.
[Test Condition 2]: External LNA noise figure 0.8, number of satellites received greater than 6, received signal strength value under the condition of locking or not losing lock within five minutes.
[Test Condition 3]: Open, unobstructed environment, continuous 24-hour power-on test, 50% CEP.
[Test Condition 4]: The number of satellites received is greater than 6, and the signal strength of all satellites is -130dBm.