E-882-4-E
1
Power
Flow input
1/1 output
Density input
Press. input
Temp. input
Analog output
Pulse output
1
Pulse output
2
Pulse output
3
Com port
Te
rminal
Bloc
k
Address path
Data path
P
ower Boar
d
Interface Boar
d
Comm
unication Boar
d
CPU Boar
d
I/O Boar
d
Power Unit
Internal Power
Flow Input Ckt.
Dens. Input Ckt.
A/D
Converter
Press. Input Ckt. (analog)
Temp. Input Ckt. (analog)
Temp. Input Ckt. (Pt)
Analog Output Circuit
Pulse Output Circuit
1
Pulse Output Circuit
2
Pulse Output Circuit
3
Multi plexer
Isolation
Test Pins
Test Pins
Internal
V
olt.
Buzzer
Motherboar
d
K
ey
boar
d
IC Car
d
128
×
128 dots
ST Displa
y
RUN
×
8 keys
Isolation
Isolation
Isolation
Isolation
Parallel I/O
Timer Counter
Parallel I/O
CPU
20MHz
Memory
RS485
Isolation
IC Card Interface Circuit
32.768kHz Real
Time
Clock
Lithium Battery
Isolation
Power Detect
Fuse
Fi
g.
1
2.
1
O
ve
ra
ll B
lo
ck
D
ia
gr
am
12. OVERALL BLOCK DIAGRAM