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SCC-F Sample gas feed unit Operator’s manual
42/23-51 EN Rev. 3
I/O card
I/O card option
An I/O card is installed in the SCC-F sample gas feed unit as an option. The SCC-F
sample gas feed unit and the SCC-C sample gas cooler are connected to the
AO2000 gas analyzers via the I/O card and the system bus (see Figure 18).
Figure 18
System bus structure
(example)
I/O card functions
Display of the cooler temperature
“Cooler” indication on the AO2000 screen
Monitoring of the cooler temperature
Status message “Failure” and shut-down
of the sample gas pumps and the dosing
pump if the cooler temperature is too high
Monitoring for break out of
condensation
Status message “Failure” and shut-down
of the sample gas pumps and the dosing
pump at break out of condensation
Monitoring of the sample gas
flow rate
Status message “Maintenance request”
if the sample gas flow rate is too low
Monitoring of the level of the
condensate collection bottle
Status message “Maintenance request”
if the level is too high
Monitoring of the level of the
reagent supply bottle
Status message “Maintenance request”
if the level is too low
Control of external solenoid valves
for zero gas injection
AO2000
SCC-F
SCC-C
System Bus
