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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

GND Ground

TxT Transmit Data

RxD Receive Data

RTS Request To Send

CTS Clear To Send

DTR Data Terminal Ready

GND Ground

DCD Data Carrier Detect

DTR Data Terminal Ready

RI Ring

9 pin contact (male at the computer end):

Pin # Signal Name

DCD Data Carrier Detect

RxD Receive Data

TxD Transmit Data

DTR Data Terminal Ready

GND Ground

DSR Data Set Ready

RTS Request To Send

CTS Clear To Send

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.

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Riello-ups PowerShield³ Manual de usuario Pagina 77