Coffeemaker User Manual

User’s Manual
39
PART 2 DA264
2. Specifications
2.2 Internal block diagram
The DA264 performs the following operations.
The digital data for D/A conversion generated by the T2 program are written into the DA264.
The written digital data are transferred to the D/A converter through optical isolator. Then the
D/A converter converts the digital values to the analog signals.
The generated analog signals are output to each channel (CH1 to CH4) via amplifier. Each
channel has both the voltage output and the current output. However either voltage or current
output can be used.
Internal control circuit
LED
T2 CPU
Optical isolation
D/A conversion
Amplifier Buffer
CH1
P
N
Voltage
check
circuit
+5V
+15V
-15V
AG
P24
COM
LG
FG
DC/DC
converter
Filter
Regulator
Amplifier
P
N
TR
(V→V)
(V→I)
Amplifier Buffer
Amplifier
TR
(V→V)
(V→I)
Reference
voltage
Voltage
output
Current
output
CH4
P
N
P
N
Voltage
output
Current
output
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