Sequoia / Tahoe Series User Manual California Instruments
94 M447352-01 REV-A
Figure 4-16: External Analog Programming – Reference AC waveform for Phase C
4.3.2 External Analog Programming of Output Voltage Amplitude (Source and Grid-Simulator
MODE)
NOTE: This function is available in both the SEQUOIA and TAHOE series power supply and for the
SEQUOIA series, this function is applicable only in SOURCE and Grid-Simulator Modes of operation.
This is an alternative method where the user can program the amplitude of output voltage based on the
DC voltage provided to the External Reference Signal pins. Applying an external DC Voltage of the range
between 0VDC to 10VDC to the External Analog Control Signal Connector can provide the output voltage
to scale between 0VAC to 166VAC when low-range AC mode is selected and 0VAC to 333VAC when
high-range AC mode is selected.
Similarly, applying an external DC Voltage of the range between -10VDC to +10VDC to the External Analog
Control Signal Connector can provide the output voltage to scale between +/- 220VDC when DC mode
low range is selected and +/-440 VDC when DC mode high range is selected.
Pin 1 (External Reference Signal – Phase A) and Pin 4 (Return / ISO_COM) are to be connected to the
DC source to vary the output voltage for Phase A, refer to Figure 4-17.
Pin 2 (External Reference Signal – Phase B) and Pin 4 (Return / ISO_COM) are to be connected to the
DC source to vary the output voltage for Phase B, refer to Figure 4-18.
Pin 3 (External Reference Signal – Phase C) and Pin 4 (Return / ISO_COM) are to be connected to the
DC source to vary the output voltage for Phase C, refer to Figure 4-19.
The mentioned above pins are present in the External Analog Control Signal Connector (EXT ANLG)
available on the rear panel; refer to Table 4-2 for pin-out details.
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