
INSTALLATION
5-50
System 2 Installation / Programming Manual
Personal Computer (PC)
Serial data is sent to and received from a PC via a RS232 data link which requires a five conductor shielded
cable. It may be located up to 100 ft. from the System 2 . Connection to the System 2 are made using the on-
board 9-pin male connector (P1). The baud rate is factory set at 9600 and it may be changed. The number of
data bits is 8, there is one stop bit and no parity. The PC must emulate a VT-100 (ANSI) terminal.
A Terminal Emulation software package must be installed on your PC to program the System 2. We
recommend using the Windows Terminal Emulator. Set to emulate a VT-100 (ANSI) terminal with
“hardware” flow control.
PC Wiring
The optional PC requires a five conductor, 22 or 24 gauge stranded wire, with an overall shield. Maximum
cable length from the System 2 to the PC is 100 ft.
PC Ground
The foil shield to the PC must be earth grounded. Attach the shield from the PC cable only to Terminal #1 of
the System 2. Do not attach the foil shield to pin 1 of the 25 pin D connector.
PC Connections
You will need a male 25 pin "D" computer connector. It is necessary to solder this connector to the terminal
side of the shielded cable. You will need a female 9 pin connector and a 25 pin "D" male computer connector.
Use a good soldering iron, small tip, suitable for electronic components. Do not connect the shield to the 25 pin
"D" connector. Note: Some PC’s require a 9-pin connector. Refer to Figure 13.
Using a five conductor, shielded wire, make the following connections:
9 Pin Connector (P1 - System 2) 25 Pin Male DB25 Connector (PC):
Pin #2 Pin #2
Pin #3 Pin #3
Pin #5 Pin #7
Pin #7 Pin #5
Pin #8 Pin #4
DO NOT CONNECT THE FOIL SHIELD TO PIN #1 OF THE 25 PIN "D" CONNECTOR.
Plug the 25 pin "D" connector into the COM port on the rear of the PC.
If you are going to be using modems to program the System 2, refer to the section entitled Modems for
complete descriptions and wiring for Phone Modems and Short-Haul Modems. Refer to Figure 12.
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