EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: captainscarlet on April 27, 2016, 06:35:18 pm
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So I've recently gotten a Kikusui TOS5200 dielectric tester for a project at work.
I need to write a simple program to test our dielectric jig using the signal IO sub-D port at the back.
The datasheet says an input high is 11-15V and input low is 0-4V, so I expect it's looking for a 12V signal. Usually in my experience, there'd be a 12V source on the sub-D port that I can tap into if I wanted to use switches to control the inputs, but this has a 24V source on the back according to the data sheet. (pg 54-55 for those who are interested: http://www.kikusui.co.jp/kiku_manuals/T/TOS5200/English/TOS5200_USER_E.pdf (http://www.kikusui.co.jp/kiku_manuals/T/TOS5200/English/TOS5200_USER_E.pdf))
It seems strange to provide a 24V pin, when inputs are limited to 15V.
It's an expensive piece of kit, so I don't want to mess with it.
Anyone have any experience or see this before?
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No experience with this particular device, but from the specs its not required to apply a voltage at all, since there is an internal pull-up to +12V. That means, leaving the input open equals logic high.
In order to get it to logic low, just switch the input to ground.
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Yep, figured that out after rereading the data sheet.
Internal pull ups, just need to bring the line low.
Rookie mistake.