Microscan MS-96 Manual de usuario Pagina 185

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Appendices
MS-9 Scanner User’s Manual A-7
Optoisolator Outputs
Optoisolator circuits can transfer pulses between the scanner and peripherals with no
direct connection with the scanner’s internal circuitry. However, not every optoisolator
configuration provides complete isolation. The following diagrams show both fully
optoisolated and non-optoisolated circuits. They are only examples and do not repre
-
sent all the possible wiring configurations.
Output Circuit Examples
Fully Optoisolated
This circuit is fully optoisolated and is
the recommended configuration. It
allows the user to apply 1 to 28
VDC to
the circuit.
Caution: The maximum current that
can pass through the optoisolator is
100
mA.
Not Optoisolated, Scanner
Grounded
In this diagram, power is applied exter-
nally, but the scanner’s power ground is
used to complete the circuit. This setup
involves some risk to the optoisolator if
excessive voltages are applied.
Caution: The maximum current that
can pass through the optoisolator is
100
mA.
I
load
=5 mA I
load
=50 mA I
load
=100 mA
V
Out-On
a
a. Voltage drop across output when activated.
0.7 V0.9 V1.0 V
t
On-Typ
15 µS 20 µS 30 µS
t
Off-Typ
1000 µS 150 µS 75 µS
I
Load
Scanner
Output
Outputs (+)
Outputs (–)
Isolated Scanner
Host
1to28V
Input
Scanner
Output
Power ground
Outputs (+)
Power (+)
Outputs (–)
Non-isolated Scanner
Host
1to28V
Input
Scanner
Output
Power ground
Power (+)
Outputs (–)
Outputs (+)
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