[Signal d'interface]：RS485/RS232
[Tension de fonctionnement]：DC 8-28 V
[Puissance d'émission]：20 dBm
[Distance de communication]：1,3 km
[Dimensions]： 66 x 68 x 21 mm
[Poids]：64 ± 5 g
[Introduction]：L'EWD181-Z20 (232/485) est une radio sans fil basée sur la technologie ZigBee 3.0, offrant de multiples fonctionnalités telles que la transmission transparente et la transmission de protocole. Elle assure une transmission fiable et en temps réel des signaux de surveillance dans des conditions spécifiques, tout en offrant un faible coût et une installation et une maintenance faciles. Elle est dotée d'un revêtement conforme pour une résistance à la moisissure, à l'humidité et au brouillard salin.
Magasin officiel
| Serial number | name | Function | illustrate |
| 1 | VCC | Press-wire power interface, positive | DC 8~28V, 12V or 24V is recommended |
| 2 | GND | Press-wire power interface, negative | The negative pole of the power supply is connected to the system ground and the casing |
| 3 | AGND | Public interface | Can be connected to the ground terminal of external equipment or not |
| 4 | RXD | Serial port terminal | Receiving port, connected to the transmitting end of other devices |
| 5 | TXD | Serial port terminal | Transmitter port, connected to other device receiving end |
| 6 | RS485-B | Serial port terminal | B port for connecting to other RS485 devices |
| 7 | RS485-A | Serial port terminal | A terminal for connecting to other RS485 devices |
| 8 | PWR-LED | Power indicator | Red, always on when the power is on |
| 9 | TXD-LED | Send indicator light | Yellow, flashing when sending data |
| 10 | RXD-LED | Receiving indicator | Yellow, flashing when receiving data |
| 12 | FUNCL-LED | - | Reserved lights |
| 11 | LINK-LED | See indicator light description for details. | See indicator light description for details. |
| 13 | NWK | Network configuration button | One-click network configuration or use commands to configure the network |
| 14 | ANT (antenna interface) | SMA-K interface | External thread inner hole, length 8 mm, characteristic impedance 50Ω |
| 15 | M0 | Mode switch | Dial up for router mode, dial down for coordinator mode |
Note:
1. The user needs to use the VCC and GND terminals in ① for power supply. An 8-28V DC power supply can be used, and a 12V or 24V DC power supply is recommended.
2. If the radio experiences communication problems when connected to multiple devices, but not with a single device, try connecting a 120Ω resistor in parallel between the 485_A and 485_B terminals.
Indicator light description:
| Serial number | name | Radio Status | Indicator status | Remark |
| 11 | LINK-LED (red) | No network | Extinguished | - |
| Network configuration in progress - Coordinator or router opens the network | 1Hz flashing | - | ||
| Network configuration in progress - a router or terminal that is not connected to the network is joining the network | 10Hz flicker | - | ||
| The router or terminal network has been successfully joined. | 2Hz flashing for 3 seconds then steady on | - | ||
| The network connection is normal | Constantly on | - | ||
| Network establishment/join failure | Extinguished | - | ||
| The terminal node is offline | 5Hz flashing, 3 times per second | - |