Chromatography Forum

I'm trying to connect a AS3500 autosampler with our old dionex DX 600 system running under Peaknet 6.2. I don't have the cable to connect from the phone input on the rear of the AS3500 to the computer, but is it possible just to control the AS3500 through the TTLs on the Pump and detector? If so should the AS3500 be in stand alone or Spectranet mode? What command line should I input into my program in Peaknet? I have followed setup2 instructions for gradient methods when wiring the pump, detector and AS 3500.

I realise that these questions could be better addressed by Dionex reps, but maybe someone out there is running this configuration and can answer my question. Fewer and Fewer Dionex tech support people are familiar with these older system setups.

It would be better if you found or made one of those cables. I talked to one of our old-timers, and he just made his own from a standard phone cable and a db-9 connector, and the pinout chart in the manual. The AS3500 was made by Spectra-Physics, now a part of Thermo. The driver to use in PeakNet is TSP AS3500.

If you must use the relays or TTL, you use commands like "Pump.Relay_1.state = closed Duration = 1" or "Pump.TTL_1.on Duration = 1" to send signals to the AS3500 and "Wait Pump.Input_1 timeout=60" to wait for the TTL input. You need to make sure that the required relays and TTLs are enabled in the server configuration; you can rename them to make more sense in your programs. (Check my syntax, I'm doing this from memory.)