DAQ system USB-LT02, Руководство пользователя

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USB-LT02 Users Manual (Rev 1.0)
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http://www.daqsystem.com
A.3 Application Circuit (Isolation Input/Output)
It is used in the automations that used PC in case of USB-LT02 in order to simply
input/output that it used the established serial (RS232), parallel (printer) ports. The
advantage of USB-LT02 has no program confliction because of using exclusive USB
source, on the other hand, RS232 and printer ports have a confliction between programs
because of using common source. Also, control Input/output is possible as provide 31 I/O.
If it exchange an input and output between different equipment like factory automations
etc., it use a photo-coupler isolation in order to not to affect with mutual interference and
influence at the below pictures.
Board
Power
IN
External
Device
R
External Power
< Photo-coupler Input Circuit>
Board
Power
OUTN
External
Device
R
External Power
<Photo-coupler Output Circuit>
A register value at the above pictures can use properly selection which it fit to the
external power. The industry power mainly uses 5V, 12V, 24V, 48V.