ANATEL A643, Operator'S Manual, Page: 147 / 222

Anatel A643a - Serial Communications 147 of 220
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Anatel
Operator Manual
12 Serial Communications
12.1
General Information
Anatel A643a Analyzers are equipped with a bidirectional serial interface that allows them to
communicate with a wide variety of intelligent devices such as a Programmable Logic
Controller (PLC) or a host computer. The wiring is configured as for any PC-compatible
RS-232C serial interface.
12.2
Hardware Setup
Serial connections are made to the Analyzer on its DATA ACQUISITION Port. This RS-232C
connection communicates at 1200 baud, 8 data bits, 1 stop bit and no parity. Three- or five-
conductor cable is adequate for most serial interfaces (AWG 24 is recommended), depending
on the connected device.
Note:
Always disconnect the instrument from its power source before attempting to access internal
components.
Interface connections are made on the instrument’s I/O Connector Block as follows:
1) Turn the Anatel A643a Analyzer OFF and disconnect the power cord from its source.
2) Remove the I/O Connector Block from the bottom of the Analyzer by loosening its four
screws.
3) Loosen and remove the two screws that secure the metal strain relief plate.
4) Feed the interface wiring through one of the five holes at the end of the Connector
Block cover and along the corresponding slot in the foam padding.