Chromatography Forum

Hello,

I'm new to the forum, but I'm having an issue that I hope someone will have experience with.

We have a Dionex ASM-2 autosampler, and I am trying to connect it with a Dionex ICS-90. From my understanding, the only connections required for are the GROUND and LOAD pins.

We do not have a manual for the instrument, and Dionex has been less than helpful in providing this information.

Does anyone know the order of the pins in the Relay Out connector? There are 6 pins, and I believe (from my browsing of the AS-40 autosampler manual) there should be a ground, LOAD, READY OUT, CBL PRESENT, +5VDC and F2.

Thank you for reading this, and any help you can provide.

Hello,

I have the very same problem. Did you find a solution in the meanwhile?

thanks for helping

If these are the same as the AS40, you need to jump the cable present contacts and then use a contact closure/relay to fire the autosampler. One is ground, one is load. If you post a link to the back panel, I'll compare with the AS40. The AS40 is configured with 10 connection points that are setup in pairs. Jump the two contacts in 4 (so positions 7+8) and then use your contact closure in 3 (positions 5+6). An easy way to test is to load a sample and then just touch the wires attached to 5+6 together and see if the autosampler engages. Don't forget about jumping 7+8. That's the most overlooked centimeter of wire in my lab.
Let me know how it goes.

Thanks a lot for your answer. Unfortunately I need indication from someone that has the ASM-2.
AS40 is very similar but for the connections. the plug is different and has 6 cables instead of ten. of course functions must be the same, but placed differently. We have a newer AS40 in hause and comparison doesn't help. What i would need most is scanning of the connection pages from some old manual of ASM-2 .

Hi gschiavon,

While I do not have access to an ASM-2 to try this firsthand, I did find a copy of the manual (from 1992 ) and my interpretation is as follows:

Pin 2 (black) is LOAD
Pin 6 (brown) is Ground

In addition, Pin 5 (yellow) must be grounded or the sampler will ignore commands received through the relay cable.

Please contact me (john.guajardo@thermofisher.com) and I will send you an electronic copy of the operators manual.

OK IT WORKS!

To identify the ground cable (pin 6) if you have a not original cord and different color coding, i suggest the following:
the ground cable (6) can be easily identified because it is the only one that has a voltage, if you try it with a tester.
in any case it is the one on the left side looking at the plug.

Thanks again to John Guajardo for his help.