DCA Vantage Operator’s Guide 201
Computer Interface (LIS)
Computer Interface (LIS)
Architecture
The basic architecture is point-to-point communications between LIS and the
DCA Vantage system.
Hardware Link
The hardware link consists of serial asynchronous (RS-232) interface.
Communication is normally full duplex at one of the following user-selected
baud rates:
• 19200
• 9600
• 4800
• 2400
The system interface port is equipped with a 9-pin, D-type, male connector.
The systems are considered to be Data terminal Equipment (DTE). The signal
lines that are supported are listed below.
Character Format
You can select the following character format options when you select the LIS
communication parameters in setup at the DCA Vantage system.
The stop bits are set to 1.
Signal Line Pin Number Type
Data Carrier Detect (not used) DCD Pin 1 Control
Received Data RD Pin 2 Data
Transmitted Data TD Pin 3 Data
Data Terminal Ready (not used) DTR Pin 4 Control
Signal Ground G Pin 5 Ground
Data Set Ready (not used) DSR Pin 6 Control
Request to Send (not used) RTS Pin 7 Control
Clear to Send (not used) CTS Pin 8 Control
Ring Indicator (not used) RI Pin 9 Control
Option Selection
data bits 7 bits, 8 bits
parity odd, even, none
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