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(i.e., far below 400 ppm) may prevail, especially in
new, poorly ventilated areas. To prevent sensor
malfunctions in such situations, it is recommended
that ABC be switched OFF.
Switching ABC OFF and ON
IMPORTANT
Do not change the position of the configuration
jumper before first removing power.
ABC
OFF
Fig. 10. Switching ABC OFF (left) or ON (right)
ABC can be switched OFF by repositioning the jumper as
indicated in the left-hand side of Fig. 10. The external LED will
then flash YELLOW briefly and then remain lit YELLOW. This
indicates that ABC has finished switching OFF.
NOTE: If ABC is switched OFF, we recommend that you
then calibrate the sensor using Zero Calibration or
Background Calibration at least once per year to
ensure that the CO
level readings remain within
2
specifications.
ABC can be switched ON by repositioning the jumper as
indicated in the right-hand side of Fig. 10. The external LED
will then flash GREEN for the first 10 sec and then remain lit
GREEN. This indicates that ABC has finished switching ON.
NOTE: Only after ABC has finished switching ON or OFF
should you again remove power, return the jumper to
the desired range setting (i.e., "2000" or "3000"), and
finally restore power. The given ABC setting (ON or
OFF) will then remain in effect even if power is
subsequently removed or restored.
"DEBUG"
Fig. 11. Do not set jumper set to DEBUG!
DO NOT USE!
C7110C1001A, C7110D1009A WALL MODULES – PRODUCT DATA
ABC
ON
5
Configuration Potentiometer
The wall module features a configuration potentiometer
(accessible only after removing the top cover and, in the case
of the C7110D1009A, also the setpoint wheel – see Fig. 2)
which can be used to configure the output of terminal 2 (CO
level) and (when in the "Relay Output" mode) the "Threshold
Level (ppm)".
SERVICE LED
ACTUAL CO2
CONCENTRATION
SERVICE LED
FLASHES
MIN.
SERVICE
LED IS DARK
OFF
Fig. 12. Configuration potentiometer (e.g., set to 50% =
1000 ppm)
The CO
output can operate in two modes:
2
▪
To select the "Sensor Output" mode (analog), set the
configuration potentiometer to "OFF" (default setting) (see
Fig. 12). See also Fig. 13.
▪
To select the "Relay Output" mode (digital), set the con-
figuration potentiometer to between the "MIN." and "MAX."
markers (see Fig. 12). The hysteresis value is
permanently set to 100 ppm. See also Fig. 14.
2
(EXAMPLE)
SERVICE
LED IS LIT
MAX.
EN0B-0735GE51 R0317
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