User manual
Table Of Contents
Manual VN1600 Interface Family
© Vector Informatik GmbH Version 2.0 - 33 -
Extended measuring
range of the analog
input
In normal operation, voltages up to 18 V can be applied and measured at the analog
input. The cutoff frequency
(-3 dB) for AC voltages is approx. 7.2 kHz.
For measurements above 18 V (max. 50 V), an external series resistor has to be
applied to the analog input. The series resistor
depends on the input voltage
and can be calculated as follows:
with
The cutoff frequency for AC voltages is also affected by the external series resistor:
Examples
24 V
32 V
36 V
48 V
367 k
856 k
1100 k
1833 k
(E96)
374 k
(24.12 V)
866 k
(32.17 V)
1100 k
(36.00 V)
1870 k
(48.60 V)
(-3 dB)
1148 Hz
496 Hz
390 Hz
230 Hz