RS-485 / RS-422 to Current Loop Converter
ADA-4021

RS-485 / RS-422 to Current Loop Converter* The prices are given in the response to the offer.

The ADA-4021 converts RS485/RS422 standard to Current Loop without interfering with format of transmitted data with maximum baud rate of 38,4kbps via 2-pair of twisted pair. The converter has screw terminal block for connection of RS485/422, Current Loop networks and power supply. This device use RX+, RX-, TX+, TX- signals for operating. Over-voltage protection was made on base safety diodes and fuses on each RS485/RS422 and Current Loop lines.
It is possible to connect up to 32 devices operate in half duplex mode (inquiry / response) on 2 or 4 wires, multipoint bus or full duplex mode on 4 wires bus, built on the base of ADA-4021 converters. To Current Loop interface can be connected one device in point-to-point topology, operates in half duplex or full duplex mode. Current Loop connected device can has passive or active transmitter and receiver.
This converter has internal, low energy surge protection for each Current Loop lines however it is recommended to use the external lightning arresters (typical protection of telephone line) for the lightning protection of lines.