ADICON Support Forum Applied Digital, Inc.
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#15238 - 02/28/06 06:49 AM Using DesignSoft TINA to simulate SECU-16 Input
Brian McGinnis Offline
newbie


Registered: 01/15/03
Posts: 3
Loc: Sidney, Montana
Anyone here use TINA to do circuit design and/or testing?

I think it's a great tool to gain an understanding of electronics and try things without actually having to build them...

How can I simulate a SECU-16 input in TINA?

In other words, what's behind the input/common of a SECU-16 input?

Thanks,
-Brian

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#15239 - 02/28/06 09:26 AM Re: Using DesignSoft TINA to simulate SECU-16 Input [Re: Brian McGinnis]
Guy Lavoie Administrator Offline
Beyond All Hope
*****

Registered: 12/21/02
Posts: 6548
Loc: Montreal, QC, Canada
A SECU16 input looks like this:

Code:


+5v
|
1k res.
|
supervised
mode jumper
| Analog
input >--+---------mux chip-------->PIC analog input
|
current loop
mode jumper
|
249 ohm res.
|
common >+------------------------->common




In supervised mode, it pulls up the input signal to +5v through 1k, while in analog mode it just passes through the analog mux chip (CMOS 14051). In current loop mode, the input is pulled to common through a 249 ohm precision resistor to convert a 4 to 20mA signal into a 1 to 5v signal.
_________________________
"If you don't know what you're doing, do it neatly..."

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#15240 - 02/28/06 10:45 AM Re: Using DesignSoft TINA to simulate SECU-16 Input [Re: Guy Lavoie]
Brian McGinnis Offline
newbie


Registered: 01/15/03
Posts: 3
Loc: Sidney, Montana
Thanks, Guy. That's the info I think I was looking for. I'll play around with it a bit and see what happens.

-Brian

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