Agilent Technologies 6890 Series - Page 684

7 of 14
Jun 2001
Electrical
Agilent 6890 Gas Chromatograph Service Manual
External Connectors, 6890A and 6890 Plus 1210
RS-232
RS-232
JP1 (Host/Modem), JP2 (Sampler)
RS-232
Pin Function In/Out
1 DCD INPUT
2 RxD INPUT
3 TxD OUTPUT
4 DTR OUTPUT
5 GND
6 DSR INPUT
7 RTS OUTPUT
8 CTS INPUT
9 unused INPUT
(No Connect)
1
5
6
9
1
5
6
9
RS-232 Standard wiring
Transmitters
Receivers
3 TxD
7 RTS
4 DTR
2 RxD
8 CTS
6 DSR
1 DCD
5 GND
1
2
3
4
5
6
7
8
9
RS-232 Loop back wiring