UOTEK Industrial Rackmount RS-232 RS-485 to RS485 Hub 8 Port with Optoelectronic Isolation RS485 to RS232 RS485 Hub Half Duplex Lightning Surge Protection AC100-240V 50/60Hz UT-1208U

Parameter:
Standards: RS-232/485 EIA/TIA
Interface: RS-232C 5-pin terminal block, (1-3 pin) RS-485 5-pin terminal block(4-5pin)
Transmission media: Twisted-pair or shielded wire
Operating mode: asynchronous half-duplex
Power: AC100-240V 50/60Hz
LED for indicating PWR, TXD, RXD, E1-E8 activity
Isolation: 2, 500VRMS 500VDC continuous isolated voltage, DC/DC isolated module
Baud rate: 300- 115.2K bps
Protection: RS-232 port ±15KV ESD protection, RS-485 each port 1, 500W lightning surge protection
Transmission distance: 0-5KM(115, 200-300bps)
Dimension: 440mm×201mm×44mm
Operating temperature: -40 to 85
Relative humidity: 5% to 95%

UT-1208U is a RS-485 Hub special designed for RS485 system under complicated electromagnetic field. With dual core and non-stop running, the transmission rate can be up to 115.2KBPS. To ensure the safety and reliability of the communication, it adopts optoelectronic isolation technology on RS-485 ports; this provides surge & lightning protection with the converter & device; the internal optoelectronic isolator and 1, 500W lightning & surge protection circuit provide with 2, 500V isolated voltage to prevent from lightning and ESD. At the same time, it prevents from common-grounded interference. This hub adopts external power; it is quite safe and convenient for outdoor application.

Under RS-485 working mode, UT-1208U will detect the data flow direction by distinguishing the circuit automatically; at the same time, it will control the circuit by auto switching, this solves RS485 data receiving and transmitting delay problem. The transmission distance of RS-485 port is up to 1, 200m. UT-1208U is widely used in highway toll system, traffic monitoring system and power system.

UT-1208U RS-485 HUB provides with star topology RS-485 connection, each port supports short circuit, open-circuit protection. Users can easily change RS-485 BUS structure, and cut the network segment to improve the communication reliability. When lightning or the equipment breaks down, the network segment with problem will be isolated, to make sure the other network segment works regularly. This performance enhances the reliability of RS-485 network, and shortens the network maintenance time. Using UT-1208U RS-485 HUB in a right way will help you create a unique and reliable RS-485 system.