Figure 3: Rear panel with AIO and USB connectors
All analog signals have 5 Volt levels.
If the operating mode is switched to analog I/O (“REM”), the output voltage and current are set to the analogue input signals V
set
and I
set
. The output signals V
mon
and I
mon
monitor the measured voltage respective current.
The INHIBIT input signal enables (when high or open) or disables the high voltage generation. When INHIBIT is high, the
HV-ON-switch on the front panel must also be set to “ON” to enable high voltage generation.
Switching HV-ON to “OFF” or active INHIBIT-signal only switches off the high voltage generator, but does not put the output to
ground. The internal (approx. 2 nF) and external capacitors discharge by the internal measurement resistor (50 MΩ ± 30 %) and
the external load.
CAUTION!
CAUTION!
Hence, long discharging times are possible! Control the discharging status on the display respectively the
monitor voltages before touching any parts under tension.
The POLARITY input signal switches between positive or negative polarity (only for DPS modules, see 12 AIO connector pin
assignments). The REFERENCE output signal provides a +5 Volt reference voltage, that can, for example, be used to connect
potentiometers to the set values (see figure 4 AIO circuit for simple Vset and Iset control). In the simplest case to provide set
voltage and current via AIO, two potentiometers are connected between the internal reference voltage V
ref
and ground and the
sliding contacts are connected to V
set
and I
set
.
Figure 4: AIO circuit for simple V
set
and I
set
control
THQ Systems - CONFIGURABLE AC/DC LABORATORY HV SUPPLY | Last modified on: 2022-04-21 | www.iseg-hv.com
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