Agilent Technologies 6890 Series Service Manual page 699

1215 External Connectors, 6890N
Remote start/stop
Remote control
Remote control allows easy connection between single instruments or
systems to ensure coordinated analysis with simple coupling requirements.
Start Relay—A 120 millisecond contact closure
Prepare
H
H
Start
H
Stop
Figure 1215-7
Control of analysis is maintained by signal readiness READY for next analysis,
followed by START of run and optional STOP of run triggered on the respective
lines. In addition, PREPARE and START REQUEST may be issued.
The signal levels are defined as standard TTL levels (0 V is logic true, +5 V is
logic false).
Input Load >= 2.2 kOhm against +5 V
Output type is open collector.
8 of 10
Remote control analysis
Electrical
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001