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7001, 7002 and Switch Cards
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Joined: February 15th, 2012, 4:20 pm
Country: United States


Post by chrismu » February 15th, 2012, 4:30 pm

I'm using a 7706 switch card. When giving the command ROUT:OPEN:ALL, is there specific order in which the switches are opened.

Consider this case.
chan 1 - closed. wired to low impedance source
chan 11 - closed. wired to a differnt low impedance source.
chan 26 - closed. (In the position than isolates the "paired" channels 1 and 11 from each other.)

If I used ROUT:OPEN:ALL is there a gaurantee than chan 1 and or chan 11 will open BEFORE chan 26 opens. If chan 26 opens first, if would short chan 1 to chan 11 and cause havoc.


Vince W
Keithley Applications
Keithley Applications
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Joined: September 22nd, 2010, 12:27 pm
Country: United States


Post by Vince W » February 21st, 2012, 2:11 pm

Hello chrismu,

I don't think there is a guaranteed order or timing for each switch opening in a multiple-open command. You would be best off opening them in an explicit (safe) order of sequence.

Vince W.
A Greater Measure of Confidence

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