Intab PC-logger 3150, Как пользоваться инструкцией

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INTAB Interface-Teknik AB
1.2 Digital Inputs
Eight digital inputs are available. Input status of these can be monitored by the
computer.
This way you can measure analog signals and at the same time make sure that
digital (on/off) control signals assume the correct level at the right time.
Six event counters can be paralleled with these inputs.
By connecting pulse type transducers (flowmeters are often of this type) to
these inputs you will get values that represent pulses/time interval. This is the
easily transformed into litres per second.
The PC-Logger 3150 software can be said to be treating these values as if they
were ordinary analog values or voltages.
The digital inputs are on request fitted with filters for electrically noisy
environments.
1.2.1 Opto isolated inputs
The Opto isolated inputs (DI1 - DI8) are used to detect high-level (>10V)
signals or where isolation is essential.
The a and b inputs are equivalent and insensitive to reversal of polarity.
The auxiliary output (VO) will power the opto-couplers if no external source is
available (see 3.2.1). This output is connected directly to the mains adaptor and
is unfused. Make sure you have connected it if you want to use this output.
Remember also that you lose isolation when you use VO.
1.2.2 TTL-compatible inputs.
TTL- or low-level signals are connected to the so called pulse inputs (P1-P6).
These are paralleled with the corresponding DO inputs and do not provide any
isolation to the measured/monitored object.
The auxiliary power output for these inputs is Vp.
This voltage is derived from the internal battery through a current limiting
resistor