IDL 101
SIGNAL PROCESSING
HB_IDL101_E_V222.doc
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Gantner Instruments Test & Measurement GmbH
5. SIGNAL PROCESSING
The
Datalogger IDL 101
has 6 analog inputs and 16 digital inputs/outputs. Several different sensors as well as acknow-
ledgements and digital output signals can be connected and processed simultaneously.
5.1. Analog Inputs
The analog inputs serve to collect sensor signals, or to acquire control values respectively. They are particularly
conceived to measure voltages, currents and resistances.
Every single input can be configured in its type of measurement, independent of the others. The
Datalogger IDL 101
has altogether 6 equivalent analog inputs at disposal.
Notice
: Overloads of more than ±10 VDC will lead to false measuring results in the according analog input variable.
Overloads of more than ±15 VDC do also have influence on the measuring accuracy of the other input variables.
5.2. Digital Inputs/Outputs
The 16 digital inputs/outputs of the
Datalogger IDL 101
can be configured - independent of each other - as inputs or as
outputs. The current status (in/out) is signalized by one (for power saving via software disconnectable) LED each.
As inputs the I/Os can be used for collecting acknowledgements, for measuring frequencies or for counting. Status
information can be issued by the outputs in a digital format. The possibilities here are host-out and process-out.
The digital inputs have an excess voltage protection (transil diodes), which comes into action at approx. 33 V. The
maximum permissible input voltage amounts to 30 V. Input voltages between 3.5 VDC and 30 VDC are interpreted as
logic
LOW
("0"), input voltages lower than 1.0 V as logic
HIGH
("1"). The maximum fan-in current amounts to 1.5 mA.
+ 3,5 V
+ 1,0 V
0 V
low high (1)
high low (0)
signal level logic level
Figure 5.1 Definition of signal levels and logic levels
The outputs are open-collector outputs with a maximum voltage of 30 VDC and a maximum fan-out current of 100 mA.
The outputs are internally connected to the power supply potential (10 .. 30 VDC) via a 22 kΩ pull-up resistor.
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