💡 Key Summary: Long-range wireless transceiver that sends alarm dry-contact signals up to 1 km without wiring
YH-RF300 TX/RX is a long-range wireless transceiver that delivers dry-contact (alarm) signals from leak detectors, fire detection devices, and equipment fault alarms to remote locations via wireless. Supporting communication up to 1 km (open area, Line of Sight) and 8 inputs / 8 outputs, it enables fast and stable alarm system deployment even in large facilities where cabling is difficult.
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| YH-RF300 TX (Transmitter) | YH-RF300 RX (Receiver) |
● Wireless transmission replacing wiring: Sends alarm dry-contact signals (leak, fire, equipment fault, etc.) wirelessly to remote locations.
● 8 inputs / 8 outputs: Supports 8 inputs (COM, NO) and 8 outputs (COM, NO, NC) for easy integration with various sensors and alarm devices.
● Near real-time operation with minimal delay: TX input activation and RX output operation occur almost simultaneously, ideal for real-time alarm notification.
● Long-range communication (up to 1 km): Stable wireless transmission up to 1 km in open areas, suitable for large sites.
| Item | Specification |
| Model | YH-RF300TX (Transmitter) / YH-RF300RX (Receiver) |
| Operating Power | DC 8 ~ 38V (Wide input voltage) |
| Power Consumption | 1W (Max) - Low-power design |
| Frequency | • 447.8625 ~ 447.9875Mhz BAND (Data transmission / 11 channels) • 447.2625 ~ 447.5625Mhz BAND (Safety system / 25 channels) |
| Receiver Sensitivity | -117 dBm (TX power: +10 dBm) |
| Transmission Distance | Over 1000m (Line of Sight, 4,800bps, 10dBm, 100% receive success) |
| Antenna | SMA TYPE ANTENNA (External antenna) |
| Input | 8 points (COM, NO) Dry-contact input |
| Output | 8 points (COM, NO, NC) Dry-contact output |
| Contact Rating | AC 250V 5A / DC 30V 5A |
| Channel Setting | 32 frequency channels selectable (DIP S/W) |
| PCB Size | TX: 90(W) x 79(H)mm / RX: 63(W) x 79(H)mm |
| Enclosure Dimensions | 200mm X 150mm X 75mm (Excluding antenna) |
| Operating Temperature / Humidity | -10˚C ~ 60˚C, Max 85% RH |
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| Wireless Transmitter: YH-RF300 TX
| Wireless Receiver: YH-RF300 RX
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