Juniper Systems Allegro DOS Manual - Manual (Page 54)

Page 2-36 Hardware Features
Communication Ports
The Allegro has four communication ports:
❏ Two 9 pin serial ports (located on the top of the case)
❏ Two infrared ports ë W
IN
c
E
(one on top of the case, one on the
bottom)
These ports are recessed to protect them in case of a drop. They are also
completely sealed.
▲ ▲ ▲ ▲ ▲ 9 Pin Serial Communication Ports
The standard 9 pin serial communication ports (COM1 and COM2)
allow for the simultaneous operation of two serial devices such as
printers, modems, and bar code wands. Additional power is
provided on COM1 to power bar code wands and other sensors.
The data transfer rate on these ports ranges from 300 baud to 115
Kbaud. Rubber connector protectors keep dirt and moisture out of the
ports. The ports are sealed without the protectors.
Be sure to use the serial communication cable (9 pin to 9 pin) included
with the Allegro to connect the Allegro to a desktop PC. A wiring
diagram of the cable is shown in Section 6, Technical Reference. Note that
a standard ‘straight through’ serial cable will not work.
9 Pin D Connector Pinouts
Pin #
1
Data Carrier Detect (DCD) Input
2 Receive Data (RCD) Input
3 Transmit Data (TXD) Output
4 Data Terminal Ready (DTR) Output
5 Ground (GND)
6 Data Set Ready (DSR) Input
7 Request To Send (RTS) Output
8 Clear To Send (CTS) Input
9 Ring Indicator (RI) Input