THORLABS Kinesis PFM450E, Руководство пользователя

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Page 41 ETN018233-D03
PFM450E Piezo Focus Mount and Controller
A.2.2 Digital Outputs
All digital outputs are of the open-collector type, with a 330 Ohm series resistor. When
the output is set to a logic zero (which is also the default state), it behaves as open
circuit. When it is a logic one, it behaves as a 330 Ohm resistor connected to ground.
Fig. A.3 Digital Output Schematic
In some applications, the digital outputs may be required to control external equipment
that has optocoupler type inputs (such as PLCs). The digital outputs used here can be
used to directly drive most optocouplers and the +5V supply available on pins 14 and
15 can be used to provide power for the optocouplers.
Fig. A.4 Application Example: Connection to Optocoupler Inputs
The digital outputs can also be used to interface to external logic circuitry (a pull-up
resistor may be needed if the external logic does not contain it) or control other types
of inputs.
Please see the Kinesis helpfile for details on software calls used to control these logic
IO.
Caution
The voltage that external equipment applies to the digital outputs must be within
the range 0 V and +5 V DC, or damage to the outputs may occur.
Output
330R
0V
330R
gnd
+5V
Optocoupler