Agilent Technologies VS Series Operation Manual page 48

VS Series Helium Mass Spectrometer Leak Detectors
➃
I/O Connector
1-26
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 pulse width.
All inputs are opto-isolator LEDs with a series 3300 Ohm resistor.
Outputs:
Eight optically isolated emitter followers with a 10 Ohm
❑
series resistor, 14 mA max drive current, +24VDC max.
Power:
An external power supply is supplied by the user.
❑
A detailed summary of information related to I/O pin identifications
is provided in Table A-6 on page A-14.