Agilent Technologies 5975C TAD VL MSD, Troubleshooting And Maintenance Manual

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228 5975 Series 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 53 ) on the back panel of the MSD. The remote start cable connects the
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
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
Figure 53 Remote start connector
Start Ground
Ready