Feature:1. YN2209 is an active isolated RS485 repeater designed to solve the industrial complex electromagnetic environment. The external power supply can ensure the stability and reliability of the equipment during longterm operation.2. Photoelectric technology isolation can ensure that the equipment is not damaged by the ground loop and the common mode voltage difference during the communication process.3. YN2209 can extend the existing RS485 by 1200m to solve the problem of signal attenuation caused by too long RS485 wiring. The baud rate supported at the same time is up to 115.2kpbs.4. The direction control of the RS485 bus is automatically completed by the onboard microprocessor, without software intervention, and the YN2209 can work in an industrialgrade temperature and humidity environment5. Can be used for video surveillance, building intercom, PLC, card access control, power acquisition, time attendance, etc.Specification:Item Type: RS485 RepeaterMaterial: ABSModel: YN22091. Interface Characteristics: Compatible with EIA/TIA's RS 485 Standard2. Electrical Interface: RS 485 Bolted Terminal3. Interface Protection: 600w Thunder Surge Protection4. Transmission Medium: Twisted Pair or Shielded Twisted Pair5. Number of Nodes: Maximum 32 (128 Can Be Customized, Contact Customer Service)6.terminal Resistance: Externally Connected As Needed7 Transmission Rate: 600bps-115.2kbps8. Transmission Distance: 4000ft (1200m) at 9.6kbps9. Isolation Voltage: 1000V10. Input Power: DC9-24V11 Status Indication: Real-time Display of the On-board Transceiver Indicator12. Working Temperature: -20~6513.working Humidity: 25%~85% (non-condensing).Package List:1 xRS485 RepeaterNote:Do not use outside the voltage range.