The Isolated Bidirectional EIA-232-D/EIA-422-A/(EIA-485) Adaptor converts EIA-232-D signals (4 lines) to EIA-422-A/(EIA-485) signals and vice versa. (This unit supports 2 and 4 wire EIA-485 applications). The EIA-232-D and EIA-422-A/(EIA-485) ports are optically isolated from each other, in addition data and signals lines are protected by transient voltage suppressors.
Build in balanced resistors can be used for line termination, the required configuration of balanced resistors is jumpers selectable.
This unit is powered by internal dual isolated power supply.
Full or half duplex asynchronous data transmission can be achieved at data rates up to 120K baud on extended distance .
The EIA-422-A/EIA-485 port can interface up to 10 multi-dropped EIA-422-A receiver inputs and up to 32 multi-dropped EIA-485 receiver input without use of the repeater. In data boosting mode the EIA-422-A/(EIA-485) port can interface up to 20 multi-dropped EIA-422-A receiver inputs . The unit contains EIA-422-A repeater circuit.
This unit can be used for EIA-422-A/EIA-485 data line monitoring.
In multipoint communication with pollable equipment that does not support RTS/CTS, the incoming data will trigger the converter to communicate with the host device .
(When used in pairs, these units also function as EIA-485 repeater).
When the rack version is used these converters can be mixed in the some rack with MIL-188-C, MIL-188-114A, fibre optic and current loop converters, to provide multiplexing/concentrator function.
This product is fully design, build and supported in Australia.
Several different models of data communication interface converters are available from JZW Control System.
All build to high industrial/military standard, are available as self contained units, or rack mounted .