HYM781 UHF RFID reader uses R2000 chip, which complies with EPC C1G2 protocol, its working frequency is 840~960MHz. It supports dense reader working mode.With standard 8dBi antenna,the reading distance can reach up to 10meters, maximum identifying speed can reach 400/S; with simple power supply and interface circuit, a high-performance RFID system can be established. It is suitable for new-retail, file management, logistics,
costume, medical industry,garment Industry and complex assets managements etc.
Technical Data
| No | Item | Technical data | Unit | Remark |
| 1 | Fixed current | 700 | mA | Max power output@12V |
| 2 | Standby current | ≤1 | mA | EN pin low level |
| 3 | Frequency range | 840～960 | MHz | |
| 4 |
Default working frequency |
Frequency hopping | MHz | Frequency interval 250KHz |
| 5 | Channel bandwidth | 250 | KHz | |
| 6 | Frequency hopping speed | ≤2 | s | |
| 7 | Fixed power | 31.5 ±1 | dBm | |
| 8 | Stepping interval | 1 | dB | |
| 9 | Label protocol |
EPC C1G2 /ISO18000-6C |
||
| 10 |
Communication protocol |
Asynchronous serial ports protocol |
RS232 Label | |
| 11 | Starting time | ≤50 | ms | |
| 12 |
Radio-frequency power rising time |
≤500 | μs | |
| 13 |
Radio-frequency power dropping time |
≤500 | μs | |
| 14 |
Adjacent channel power leaking ratio |
≤-40 | dB | ±1CH |
| ≤-60 | dB | ±2CH | ||
| 15 | Frequency stabilizing ratio | ±10 | ppm | -25℃ ～+40℃ |
| ±20 | ppm | -40℃ ～+60℃ | ||
| 16 | Max reading range | 10 | m | 8dBi antenna |
Characteristics of DC
| Data | Mini value | Typical value | Max value | Unit | Remark |
| Voltage of power | 9 | 12 | 14 | V | Direct current |
| Communication level | 15 | V | Rs232 |
Appearance and structure
• Size（L×W×H）：105×95×25mm（90degree SMA connector）
• Weight：100g
• Positioning hole：82*77mm φ4mm screw
4/5PIN Interface definition
4/5pin interface type：Horizon XH2.54mm
| P/N | ITEM | TECHNICAL DATA | Unit | Remark |
| PIN | Signal name | Signal direction | Function and compatibility description | |
| 1 | VCC | Input | 12V power | |
| 2 | GND | - | Ground | |
| 3 | RS232_TX | output | RS232 Serial interface transmission | |
| 4 | RS232_RX | input | RS232 Serial interface Receiving | |
| 5 | EN | input | Module power supply enable | 5PIN available |
RF interface
SMA female
Requirement on antenna
| No | Item | Technical data | Unit | Remark |
| 1 | Standing wave ratio | ≤1.5 |
Environment requirement
| No | Item | Technical data | Unit | Remark |
| 1 | Working temperature | -10～+70 | ℃ | |
| 2 | Storage temperature | -40～+85 | ℃ | |
| 3 | Relative humidity | 10%～90% | RH |
