Rhombus280 B remote directional adjustable reader technical manual, which includes product introduction, specification parameters, interface description and other information.
This technical manual introduces the Rhombus280 B long‑range directional card reader, describing its 2.45 GHz microwave operation, adjustable read distance of 2‑15 m, and 120° fan‑shaped read zone. Safety notes advise keeping metal objects away from the sensor and using a linear regulated power supply.
The document lists detailed electrical parameters, physical dimensions, and interface connections (RS485), along with environmental limits and antenna specifications, enabling proper installation and maintenance. This manual is written in Chinese.
| Working frequency | 2.45 GHz |
|---|---|
| Frequency bandwidth | 8 MHz |
| Modulation method | GFSK |
| Peak RF power | 1 mW |
| Receive sensitivity | 90 dBm |
| Voltage standing wave ratio | <1.5 |
| Front/back ratio | >25 dB |
| Polarization | Vertical |
| Read zone | 120° fan‑shaped |
| Adjustable read distance | 2–15 m |
| Maximum read speed | 100 km/h |
| Anti‑collision capacity | 30 cards |
| Input voltage | DC 12 V ±15 % |
| Working current | 60 mA |
| Operating temperature | 40 °C–+70 °C |
| Reader weight | 0.75 kg |
| Antenna dimensions | 245 mm × 215.6 mm × 5.7 mm |
| Antenna weight | 2.0 kg |
| Antenna wind resistance | 60 m/s |
The read distance can be set between 2 and 15 meters by the user.
The device can identify up to 30 cards at the same time.
It operates from a DC 12 V supply with a tolerance of ±15 %.