Instrument Operating Block Diagram - ABB AW400 Series Instruction Manual

2.6 Instrument operating block diagram

CPU
configuration
output setting
alarms
algorithms and
routines
DIGITAL I/O
CCI 1 freezes Ch.1
CCI 2 freezes Ch.2
CCI 1 + CCI 2 when
in OR freeze Ch.1 +
Ch.2
CCO 1
CCO1Ö6
CCO 2
functions
CCO 3 depend on
type of
CCO 4
instrument
CCO 5
selected
CCO 6
CCO 7 watch dog
SERIAL
COMMUNICATION
RS485
RS422
RS232
G
ANALOG I/O
Channel 1
Type of chann.
Calibration data
Input signals:
pH, mV, O2, Cl,
CD, O3, mA
Output signal:
(0 – 20 or 4 – 20
mA)
B
POWER
SUPPLY
power supply to
all pc boards and
components
C
ANALOG I/O
Channel 2
Type of chann.
Calibration data
Input signals:
pH, mV, O2, Cl,
CD, O3, mA
Output signal:
(0 – 20 or 4 – 20
mA)
E
D
A
Output signal:
ANALOG I/O
Channel 3
Type of chann.
Calibration data
Input signals:
pH, mV, O2, Cl,
CD, O3, mA
Output signal:
– –
(0 20 or 4 20
mA)
F
9