Agilent Technologies Helium User Manual page 59

Technical Information
The rear panel of the leak detector (Model G8610A and G8610B) is shown in the
following figure.
Figure 22 Rear Panel (with Discrete I/O PCB)
I/O Connector is a 25-pin female D-sub connector to interface with an external PLC
via a parallel cable.
Inputs:

 Four level inputs: optically isolated, (+5 to+24) VDC.
 Four momentary inputs: optically isolated, (+5 to+24) VDC, requires 200 ms
All inputs are opto-isolator LEDs with a series 3300 Ohm resistor.
 Outputs: Eight optically isolated emitter followers with a 10 Ohm series
 Power: An external power supply is supplied by the user.
Agilent Helium Leak Detector User Manual
7
9
pulse width.
resistor, 14 mA max drive current, +24VDC max.
59