Справочник Пользователя для Advantech Barcode Reader RS-485
3-6
ADAM-5000
ADAM-5000 System
program execution without undue influence on your system. Probabili-
ty of a system crash has thus minimized.
ty of a system crash has thus minimized.
3.3
System Setup
A Single System Setup thru the RS-232 Port
If users would like to use a PC to locally control and monitor a simple
application, the ADAM-5000 system provides up to 64 points or 128
points and front-end wiring through the RS-232 port to the host
computer.
application, the ADAM-5000 system provides up to 64 points or 128
points and front-end wiring through the RS-232 port to the host
computer.
A Distributed I/O Setup thru the RS-485 Network
The RS-485 network provides lower-noise sensor readings as the
systems can be placed much closer to the source. Up to 256
ADAM-5000 systems may be connected to an RS-485
multi-drop network by using the ADAM-4510/4510S RS-485 repeaters,
extending the maximum communication distance to 4,000 ft. The host
computer is connected to the RS-485 network from one of its COM
ports through the ADAM-4520/4522 RS-232/RS-485 converter.
systems can be placed much closer to the source. Up to 256
ADAM-5000 systems may be connected to an RS-485
multi-drop network by using the ADAM-4510/4510S RS-485 repeaters,
extending the maximum communication distance to 4,000 ft. The host
computer is connected to the RS-485 network from one of its COM
ports through the ADAM-4520/4522 RS-232/RS-485 converter.
To boost the network's throughput, the ADAM-4510/4510S RS-485
repeaters use a logical RTS signal to manage the repeater's direction.
Only two wires are needed for the RS-485 network: DATA+ and
DATA-. Inexpensive, shielded twisted-pair wiring is employed.
repeaters use a logical RTS signal to manage the repeater's direction.
Only two wires are needed for the RS-485 network: DATA+ and
DATA-. Inexpensive, shielded twisted-pair wiring is employed.