TSI Instruments 3082, Operation And Service Manual

Page: 87 / 225

Instrument Description 4-11
The following options are available on the Digital I/O:
Out 1 The Not Ready signal. Indicates one of the following: status flag
errors from the connected detectors, status flag errors for the
Classifier, flows off or not at steady operating condition,
temperature faults, undefined or non-valid hardware
configuration, SMPS spectrometer scanning is in process, or the
STOP input is asserted.
Out 2 Reserved for Test commands.
In 1 The Start signal. When In 1 is closed, the SMPS spectrometer
begins sampling.
In 2 The Stop signal. When this signal is closed, the SMPS
spectrometer stops sampling and indicates a Not Ready
condition.
Signals Description Action Comment
Out 1 Not Ready Output switched to
ground when SMPS
spectrometer not
ready Rating: 30 VDC
<110 ma
Switch to ground
(non-inductive load)
Out 2 Reserved
In 1 Start High to Low transition
minimum 350 ms Internal 10K pull-up
resistor to 5 VDC
In 2 Stop (Inhibit)
The digital output (Out 1) is always active, including when the unit is under
remote control by Aerosol Instrument Manager software, or other software.
To enable the use of digital inputs (In 1, In 2), the External Trigger
checkbox must be checked on Setup > Properties >Scheduling. Note that
Digital inputs cannot be used to initiate an Aerosol Instrument Manager
software sample.
The following cable connections are required:

Cable with single conductors: 0.4 to 1.0 mm diameter (AWG26-18)

Cable with stranded conductors: 0.3 mm
2
to 1.0 mm
2
(AWG22-18);
diameter of single wire thicker than 0.18 mm.