Isolators can galvanically isolate two communication lines. This comes in handy in cases when you interconnect two devices powered from two different power supplies and there is a danger of a ground loops occuring. Ground loop can be created by improperly installed or designed system, when parts of that system are powered from different power sources on a different electrical potential. Balancing currents resulting from those different potentials can damage your equipment very easily. Galvanic isolators prevent ground loops and completely protect connected devices from damage.
CQ485 is an RS485 and RS422 repeater, converter and isolator in one device. Both sides are galvanically isolated. Easy setup software included
Price: 118 € ex VAT
US232 is a complete isolator of all RS232 signals. Over voltage protection. It can also be used as repeater, or just to enhance the RS232 signal.
Price: 52 € ex VAT