The ADA-4020 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. You can connect
32 devices operate in half duplex mode (inquiry / response) on 2 or 4 wires, multipoint RS485/422 bus or full duplex mode on 4 wires
RS485/422 bus, built on the base of ADA-4020 converters.
To Current Loop line based on ADA-4020
you can connect:
- 2 devices operating in half duplex or full duplex mode in point-to-point topology,
- 15 devices operating in half duplex mode in multipoint topology "current loop network".
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.