Argantix KDC 100-100, Руководство пользователя

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User Manual
78 KDC Series II DC Power Supplies
6.5 Controller Module (A3)
The Controller Module has the circuits to perform the following operations:
1. Generates the output voltage and current reference signals and load regulates the output
voltage or current.
2. Allows setting of Voltage and Current from the front panel or the standard RS232C or
optional GPIB interface.
3. Measures and displays the output voltage, current, peak current and power.
The controller assembly consists of the DC controller display board (A1), the DC controller
CPU/Analog board (A2), and the DC controller interface board (A3). Refer to Figure 6-1 and
Figure 6-2.
The CPU/Analog board is the core of this assembly. This board has a DSP, memory, D/A
converters, A/D converters, reference, and logic circuits to program, calibrate, and measure the
output of the KDC Power source. Voltage and current error amplifiers control the overall output
according to programmed user values. Sensed voltage and current signals from the DC Output
modules feed these error amplifiers and the measurement circuits.
The Display board (A1) holds the switches, rotary pulse generators, LED‟s, and liquid crystal
display at the front panel. The CPU board (A2) communicates directly with the liquid crystal
display and LED‟s via a parallel bus and indirectly with the switches and rotary pulse generators
via the same parallel bus through a microcontroller.
The standard interface board (A3) only provides a rear panel RS232 interface. The board uses
opto-isolators and SELV supplies to drive the serial interface chips.
The optional interface board (A3) has the same RS232 interface as the standard board as well
as similar SELV interfaces for GPIB and RS232. A programmable logic device takes the serial
data from the CPU board and directs it to the three interfaces.
The optional interface board has isolated circuits to provide function strobe, on/off, and trigger
logic signals, and analog SELV user programming of output voltage and current. This analog
programming allows 5 volt, 10 volt, or resistive user references.
The three boards that make up the controller are stacked together using stand-offs and
interconnected using ribbon cables. The whole assembly attaches to the front panel. The board
closes to the front panel is the keyboard display board. The center board in the stack is the DSP
board which also contains the control and measurement logic. The third board is either the
standard RS232C isolated interface board or the optional (-IF option) Analog I/O and GPIB
interface board.
6.5.1 Remote Control [Option] Interfaces (A8)
The KDC Series comes standard with an RS232C remote control interface. It can also be
outfitted with an analog I/O and GPIB / IEEE 488 interface board. (Option -IF, Assembly A8).
The GPIB address for the DC power supply (if installed) is selected through the
CONFIGURATION menu.