GE LPS-D, Instruction Manual, Page: 161 / 436

GE Power Management LPS-D Line Protection System 3-
11
3 HARDWARE DESCRIPTION 3.3 PRINTED CIRCUIT BOARD MODULES
3
3.3.9 DSP / ANI / COMM / LUI
The digital signal processor (DSP), located on the DSP/ANI board, contains the TMS320C52 digital signal pro-
cessor chip and its required memory. The DSP is responsible for most of the numerical calculations in the LPS-
D. It performs a recursive Fourier transform calculation to transform the digitized waveforms into phasor quan-
tities. It also handles the data acquisition through the ANI section of the board. The keypad, display and com-
munications interfaces are all on the DSP/ANI Board, as well. Figure 3–9: BLOCK DIAGRAM OF THE DSP /
COMM / LUI MODULE is the block diagram of the DSP/ANI Board.
Figure 3–9: BLOCK DIAGRAM OF THE DSP / COMM / LUI MODULE
ANI CIRCUITRY
MUX
A/D &
LATCHES
TMS320C52
DIGITAL SIGNAL
PROCESSOR
EPROM
PROGRAM
RAM
DATA
DUAL-PORT
RAM
ADDRESS DATA CONTROL
CONTROL
LOGIC
TIMER /
COUNTER
SERIAL EPROM
INTERFACE
DIGITAL I/O
INTERFACE
KEYBOARD
INTERFACE
DISPLAY / LED
INTERFACE
FRONT RS-232C
INTERFACE
REAR COMM
INTERFACE PL2
CONTROL
LOGIC
ANALOG
SEQUENCER
CONTROL LOGIC
REAR COMM
INTERFACE PL3
CURRENTS / VOLTAGES
VREF
SYNC
SCAN
ENABLE
END OF
CONVERSION
CLOCK
SEEP LINK