A-3 Optically Isolated Input Circuit Sketch - Agilent Technologies VS Series Operation Manual

VS Series Helium Mass Spectrometer Leak Detectors
Figure A-3 shows the input circuit sketch. All inputs are optically isolated 3300 Ohm
resistive loads in series with the LEDs of the opto-isolators and voltage level from +5 VDC to
+24 VDC. The required pulse inputs are 200 ms minimum pulse width.
Figure A-3 Optically Isolated Input Circuit Sketch
A-18