Riello UPS PowerShield³ - Manual (Page 77)

UPSMON User Manual Communication port specifications • 77
IX. Communication port specifications
1.
RS-232 specifications
25 pin contact (male at the computer end):
Pin # Signal Name
1 GND Ground
2 TxT Transmit Data
3 RxD Receive Data
4 RTS Request To Send
5 CTS Clear To Send
6 DTR Data Terminal Ready
7 GND Ground
8 DCD Data Carrier Detect
20 DTR Data Terminal Ready
22 RI Ring
9 pin contact (male at the computer end):
Pin # Signal Name
1 DCD Data Carrier Detect
2 RxD Receive Data
3 TxD Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring
2.
IRIX - serial communication ports
All IRIS-4D Series machines have two or more general purpose serial ports. These ports may be used to connect terminals, printers,
modems, other machines, or graphical input devices such as a tablet or dial and button box. Each line may be independently set to run at
speed, as high as 19,200 or even 38,400 bps. Various character echoing and interpreting parameters can also be set.
Special files for the serial ports exist in the /dev directory. These files, tty[dfm][1-56] are created automatically when the system
software is installed. Each port is referred to by three different names, represents the port number.
Some drivers are used for directly connecting simple devices including most terminals; others for the use modem control signals; and
more for devices that understand hardware flow control signals.