Function Description; Analog Inputs; Voltage Ranges - Addi-Data APCI-3003 Technical Description

Function description

4 Function description

4.1 Analog inputs

Up to 4 differential signals can be connected to the APCI-3003 board.
Each channel has its own A/D converter. A high throughput rate (400 kHz per channel) can be reached
by a simultaneous conversion of all four channels.
The four analog modules are always started simultaneously. Only the configured channels are written
in the read registers provided for this purpose (FIFO, AUTOREFRESH RAM).
Besides the software trigger, the analog acquisition can also be started via the hardware trigger, i.e. by
a signal change from 0 V to 24 V at the digital input 0 (see Chapter 4.1.3).

4.1.1 Voltage ranges

The analog input range (0-10 V, ± 10 V, 0-5 V, ±5 V, 0-2 V, ± 2 V, 0-1 V, ± 1 V or optional 0-20 mA) and
the gain can be selected through software for each channel. This enables different voltages
(or currents) with the channels so that the resolution of the A/D converter can be used to full capacity.
www.addi-data.com
NOTICE!
Please note that a longer settling time of the measurement chain
has to be reckoned with when switching the voltage range from
unipolar to bipolar or vice versa.
19
APCI-3003