Serial converter repeater isolator RealPower 284515

The RealPower 284515 is a USB 2.0 RS-422/485 serial converter, repeater and isolator engineered for reliable industrial data transmission. The device converts USB 2.0 to differential serial interfaces and provides galvanic isolation to protect host systems and field equipment. Its compact housing and wide input voltage range make it suitable for integration into control cabinets, automation systems and remote communication nodes.

Advantages

The device provides galvanic isolation between USB and RS-422/485 interfaces to reduce ground loop currents and protect connected equipment. Support for both RS-422 and RS-485 differential signalling enables flexible use with a variety of serial devices. The broad input voltage range supports 9–35 V supply voltages while using an internal stable 5 V operating rail for the converter electronics. Its compact dimensions allow installation in space-constrained environments and industrial enclosures.

Suitable for

• Connecting legacy serial equipment to modern USB hosts in industrial control systems
• Long-distance differential serial links using RS-422 or RS-485
• Applications requiring galvanic isolation to protect sensors, controllers or PCs
• Use inside control cabinets, test rigs or monitoring stations

Key specifications

• Interface: USB 2.0 to RS-422/RS-485 differential serial
• Functionality: converter, repeater and isolation
• Operating voltage (device electronics): 5 V regulated
• Supply voltage range: 9–35 V DC
• Isolation: galvanic isolation between USB and serial ports
• Physical dimensions: 483 mm (width) × 445 mm (depth) × 135 mm (height)
• Suitable environments: industrial installations and control cabinets

How to use

Connect the unit to a USB host using the provided cable or a compatible USB 2.0 cable, and wire the RS-422/485 differential pairs to the target serial device according to the device pinout. Supply the unit with a DC voltage within the specified 9–35 V range; the converter electronics run on an internal regulated 5 V. Configure the host serial port parameters (baud rate, parity, data bits, stop bits) to match the connected serial device. If using RS-485 in multi-drop networks, ensure correct termination and biasing on the bus according to the network topology.

Recommendations

Install the unit inside a galvanically secure enclosure and route power and signal cables separately from high-voltage or high-current lines. For stable serial communication over long distances, use shielded twisted-pair cable and observe correct termination and biasing for RS-422/485. Verify supply voltage and polarity before powering the device to prevent damage.