UT-520 is a repeater with isolation that complies with RS-485 standards. It can extend the RS-485 BUS network communication distance, and increase the RS-485 network device qty. The built-in optoelectronic isolator and DC/DC isolated module can provide as high as 2,500Vrms isolated voltage; the fast instant voltage restraint is designed to protect RS-485 interface; it adopts advanced TVS (TRANSIENT VOLTAGE SUPPRESSOR) instant voltage restraint. Normally, TVS tube is in high impedance state; when both sides of TVS tube suffer from high power impact in a sudden, the voltage restraint will fast lower the impedance from both sides, and absorb in big current; with this, the voltage on both sides are fixed at presupposed value, protects the component of circuit from damage.

This voltage restraint provides 600W each wire with lightning and ESD protection, and surge voltage and instant overvoltage protection on circuit which causing by all reasons; the tiny interelectrode capacitance ensures high speed transmission for RS-485 ports. Both RS-485 input & output adopt terminal block connector. This converter is with built-in zero delay auto receiving and transmitting conversion and unique I/O circuit auto control data flow direction without any handshake signal (RTS, DTR); there is no need jumper wire setting for half duplex (RS-485) mode, plug & play.

UT-520 optoelectronic isolated repeater provides connection for point to point, point to multipoint communication. For point to multipoint mode, each repeater is allowed to connect 128 sets of RS-485 devices with baud rate 300-115.2Kbps. The power and data flow indicators indicate the working status.

• Standards: RS-232C、RS-485 EIA/TIA
• Connector: RS-232C: 10 bits terminal block

RS-485: 10 bits terminal block

• Transmission media: twisted-pair or shielded cable
• Working mode: asynchronous half-duplex
• Operating power: 9-30VDC/350mA
• LEDs for indicating PWR TXD, RXD, and E1-E4 activity
• Isolated voltage 2,500VRMS 500 DC, DC/DC module
• Baud rate: 300bps-115.2kbps
• Protection level: RS-232 ±15KV ESD protection
• RS-485 provides with 600W lightning, surge protection each line
• Transmission distance: 0-5,000m (115,200-300bps)
• Dimension: 120mm×80mm×25mm
• Operating temperature: -40℃to 85℃
• Relative humidity: 5% to 95%
• Work with all communication software, plug & play