Dokument
IMA 212
Rev
1
Page
3 (4)
Electrical connections
The power supply has to be connected to
+~
and
.
is considered as system
ground. The same ground reference has to be used for the CF3-W-US-Disp-FLI unit
and for the DDC/signal receiver.
PLEASE NOTE! The same ground reference has to be
used for the CF3-W-US-Disp-FLI unit and for the control
system!
Terminal
Function
Electrical data
Remarks
+~
Power (+)
Power ground (-)
24 VAC/DC+ (+-20%),
2W
24 VAC/DC-
System voltage reference
OUT1
OUT2
Analogue output
1 (+)
Silences the
acoustic alarm
0-10 VDC
0-2000 ppm CO
2
A push on the push button
silences the acoustic alarm
for 30 minutes.
Table I. Connections of the main terminal of CF3-W-US-Disp-FLI
LED Colour
Electrical data
Remarks
Green
0VDC
10VDC
Lit between 0-800 ppm CO
2
Yellow
0VDC
10VDC
Lit between 800-1400 ppm CO
2
Red
0VDC
10VDC
Lit above 1400 ppm CO
2
. Buzzer sounds.
Table II. The LEDs
Self-diagnostics
The system contains complete self-diagnostic procedures that are executed
automatically when the sensor is in operation. Sensors with display show a wrench if
an error is found. The wrench is shown during the first seconds after power up and if
the measuring range is exceeded.
Maintenance
The CF3-W-US-Disp-FLI is basically maintenance free in normal environments
thanks to the built-in self-correcting ABC algorithm.
PLEASE NOTE! The sensor accuracy is defined at continuous operation (at
least 3 weeks after installation)
Electronic products should be disposed of via a suitable recycling centre.