National Instruments RMX-410 Series, Руководство пользователя, Страница: 76 / 132

75
NATIONAL
INSTRUMENTS
NOTES:
1. In Remote analog mode: the output voltage cannot be set by the Voltage encoder.
The output voltage limit is set to 5% over the model-rated maximum value. The output Current
limit is set by the Current encoder to 5% over the model-rated maximum value.
2. The power supply will operate within the extended range, however it is not recommended to
operate the power supply over its voltage and current rating and performance is not guaranteed.
3. Communication: In Remote analog mode, power supply parameters can be programmed and
read back via the Communication port except output voltage and current settings.
4. To maintain the temperature stability specification of the power supply, the resistors used
for programming should be stable and low noise resistors, with a temperature coefficient of less
than 50ppm.
5. Radiated emissions, FCC requirements: FCC requirements for radiated emissions, use a shielded
cable for the analog control signals. In cases using a non shielded cable, attach an EMI ferrite
suppressor to the cable, as close as possible to the power supply.
6. Front panel PREV button: Use PREV button to display the output voltage and current settings
defined by the Encoders or Communication.
6.6 Programming Monitoring of Output Voltage (V_MON) and Current (I_MON)
The J1 connector, located on the rear panel provides analog signals for monitoring the output
voltage and output current. Selection of the voltage range between 0-5V or 0-10V is made via
Front Panel.
The monitoring signals represent 0 to 100% of the power supply output voltage and output
current. The monitor outputs have 500 ohm series output resistance.
Ensure that the sensing circuit has an input resistance of greater than 500 Kohm or accuracy
will be reduced.
Range selection as follows:
1. Press MENU button. MENU (GREEN) LED illuminates. ”
Set
” appears on Voltage display.
2. Press Voltage encoder. ”
Ot
” message appears on Voltage Display and ”
CvRR
” appears on
the Current display.
3. Rotate Voltage encoder until ”
rNG
” appears on display. Press on the relevant Encoder.
4. ”
rANG
” appears on Voltage display and ”
5
” (5V) or ”
10
” (10V) appears on Current display.
5. Rotate and press the Current encoder to select the desired monitoring Voltage range.
6. Press MENU button twice to return display to the previous state. MENU LED turns OFF.