YOKOGAWA CW240

App.1-1
IM CW240E
Appendix
App
Appendix
Appendix 1 Block Diagram
U1
Range Amp
U3
LPF
U2
N
Voltage Input Area (insulated)
Power Supply
Circuit
Ref.
ISO.
ADC
ADC
ADC
CPU
SDRAM
PLL
For Program Storage
For Data Storage
F SEL
Urange
LPF_ON
FPGA
RTC
EEPROM
Buzzer
Key
RS-232
PC
Printer
External
Signal
VRAM
PC Card
Power Supply
Circuit
Current Input
Area
Ref.
Range Amp
ADC
DAC
(Option)
Range Amp
ADC
ADC
ADC
ADC
I1
I2
I3
I4
Charge Circuit
Irange
AC Adapter
LCD Unit (with LED backlight)
LCD
Driver
LCD
Driver
Dot Matrix
LCD
320 ⫻ 240
LCD
Controller
FPGA
Contrast
Adjustment
Control
I/O
DA Output
4ch
Analog
Input 2ch
Flash
Memory
Flash
Memory
Backup
SRAM
NiMH
Battery
Zero Cross
Detector