# Level Converter V5.0

URL: https://irs.systems/en/docs/level-converter

The isolated serial interface is available in two variants, one for K-Line and one for RS485.



The interface has a galvanic isolation of min. 1kV and protects the PC Hardware from failures on the DUT side.

The K-Line is a bi-directional one wire bus mainly used in the automotive industry and specified by ISO9141 and ISO14230-1.

RS485 is a bus for differential serial data transmission and can be used over long distances and in electrically noisy environments.

![Isolated serial interface PCB with RS232 D-Sub9, terminal block and K-Line / RS485 D-Sub9](/docs/assets/level-converter/images/level-converter.jpg)

![Isolated serial interface, smaller PCB with one D-Sub9 and pin header](/docs/assets/level-converter/images/lc-board-small.jpg)