The DGH A2000 is a
bi-directional RS232/RS485 converter. RS485 is recommended when
many DGH modules, or other addressable devices, must be connected to a
host computer over long distances. The A2000 RS232/RS485 converters allow
communications bus lengths up to 4,000 feet and baud rates up to 115.2K
baud using one twisted pair of wires.
The A2000 may also
be used as an RS485 repeater. RS485 repeaters re-amplify the RS485 signal
when transmitting >4000 feet. They also allow more than 32 devices to
be connected to the RS485 bus.
software written for half-duplex RS232 may be used without modification.
The RS485 bus control is completely transparent to the user.
The A2000 is DC
powered: 10 to 3Vdc, unregulated.
Use the CA-2 cable
to connect to a host computer 9 pin serial port.