Agilent Technologies 6890 Series Service Manual page 685

Gas chromatograph

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Table of Contents

External Connectors, 6890A and 6890 Plus

Signal descriptions

Data Carrier Detect

SC26C92. Currently, there are no plans to use this signal.

Receive Data

Transmit Data

Data Terminal Ready

communications (self-test complete).

Digital Ground

Data Set Ready

Request to Send

flow control set. If flow control is configured for XON/XOFF or NONE, RTS

will stay ON. If HARDWARE handshake is configured, RTS is used to inform

the host that the 6890 GC is ready to communicate and there is room in the

data buffer for data. RTS will follow the same logic as XON/XOFF for pacing

Clear to Send

HARDWARE flow control is set. When CTS is sensed in the OFF state,

transmission will be suspended. If flow control is set to XON/XOFF or NONE,

DSR will be ignored.

Clear to Send

is connected to a general purpose input on the

will be set ON when the 6890 GC is ready for

is tied to the digital signal ground on the mainboard.

is connected to the SC26C92. Not currently used.

is set ON when the 6890 GC to the host when HARDWARE

is used for pacing data from the 6890 GC to the host when

Not currently used.

Agilent 6890 Gas Chromatograph Service Manual

Troubleshooting

6890a 6890 plus