Advantech PCL-734 Manual de usuario Pagina 17

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Chapter 3 Signal connections
1313
1313
13
Isolated Output
Eachoftheeight isolateddigitaloutputchannels comeequippedwith
eightdarlingtontransistorsfeaturingcommonemittersandintegral
suppressiondiodesforinductiveloads.
Iftheexternalvoltage(5to40V)isconnectedtoeachisolatedoutput
channel(IDO)anditsisolateddigitaloutputturnson(max.of200
mAperchannel),thecard'scurrentwillsinkfromtheexternal
voltage. The current through each E.GND should not exceed 50 mA.
If the current forallchannels combined exceed 150mA,returnthe
currenttotheexternalvoltage through CN2. Thefollowing figure
showshowtoconnectanexternaloutputloadtothecard'sisolated
outputs.
E XT E R NA L C I R C U IT R
Y
I NT E RN A L C IR C U I T R YV C C
O NE PA I R O F 2 80 3 A
N P N
D I OD E
V D D
DC (5 -4 0V
E . G N D
P C 81 7 C
E . G N D
D C /D C
R
R
N P N
L O A D
R R
R
I DO
P C O M
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