Interfacing To External Devices - Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual

8
Electronics

Interfacing to External Devices

Remote control processor
The remote control processor on the LAN/MS control card synchronizes
start-run signals with GCs and other devices. The functions of the remote
control processor are extended to the remote start (Remote) connector
(Figure
GC and the MSD.
Remote start signals
It is often necessary to communicate with external devices (for example, a
purge-and-trap) during a run. Typically, these communications are requests to
send a system-ready signal. They also include:
• Receive a start run signal from an external device
• Program the timing of events during a run
Figure 53
System ready
When interfacing to an external device, it is often desirable to send a
system-ready signal to the device. In the case of a multisample Tekmar
purge-and-trap, each sample is purged onto a trap where it waits for a ready
228
53) on the back panel of the MSD. The remote start cable connects the
Remote start connector
5975 Series MSD Troubleshooting and Maintenance Manual
Start Ground
Ready