User`s manual

2-10 Intellio C320Turbo/PCI User's Manual
indicators will light on when local port is opened while DSR and CTS indicators will
light on when remote port is opened. TxD indicator will light on if local port is
transmitting data and RxD indicator will light on if local port is receiving data (or
remote port is transmitting data). DCD indicator is mostly useful to detect phone line
carrier when a modem is connected to the port.
Mix of Various UART Modules
UART Modules with various functions are produced for different requirements, such
as RS-232/RS-422, female/male DB25 connector, isolation protection or surge
protection.
No matter what interfaces they use, any two UART Modules could be mixed
(connected) together freely depending on needs. For example, you may put 2 male
RS-232 UART Modules and 2 female RS-422 UART Modules together for
application consideration.