C7232 Spec Sheet

C7232A,B SENSOR AND CONTROLLER
5 63-2571—12
Input Signal
The C7232 Sensors have an adjustable range. These ranges
are determined by the SW1 and SW2 jumper settings (see
Table 2).
Table 2. CO
2
Range Jumper Settings
a
When the level reaches this value, the contacts close; when
the level drops 100 ppm below this value, the contacts open.
b
Setting when shipped from the factory.
Output Signal
The output signal can be adjusted for 0/2-10 Vdc or 0/4-20 mA
(see Table 3).
Table 3. Output Signal Jumper Settings
NOTES:
— Jumper sensors are shown on the sticker on the
inside of the cover.
— Use needle nose pliers to carefully reposition
jumpers.
— The CO
2
settings and the output signal settings
are independent of each other. 0-100% and
20-100% are simply markings for the OUT jumper
settings on the sensor (to differentiate between the
two voltage and the two current ranges) and do not
refer to or alter the ppm range chosen.
Fig. 7. C7232 default jumper settings.
Example
For a CO
2
setting of 0-2000 ppm and a voltage output of 0-10 Vdc, the output would be as shown in Table 4 (arbitrary points along
the analog curve).
Table 4. 0-10 Vdc Output Example.
For a CO
2
setting of 0-2000 ppm and a voltage output of 2-10 Vdc, the output would be as shown in Table 5 (arbitrary points along
the analog curve).
Table 5. 2-10 Vdc Output Example.
CHECKOUT
Perform a quick test of the unit with the unit powered:
1. Stand close to the unit and breathe air into the sensor.
2. Check the CO
2
level registered by the controller to
ensure a strong rise.
3. When connected to a damper in a ventilation system, the
controller typically signals an increase in air flow.
SW1 SW2 AN (ppm) Relay
a
(ppm)
On On 0 to 1000 1000
On Off 0 to 2000 1200
Off
b
On
b
500 to 1500 800
Off Off 500 to 2000 1200
AN
OUT
0-100% 20-100%
Voltage 0-10Vdc 2-10Vdc
Current 0-20 mA 4-20 mA
OFF ON 0 – 100% 20 – 100% OFF ON VOLTAGE CURRENT
AN
SW2
OUT
M32547
SW1
CO
2
Level (ppm)
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Voltage Output (Vdc) 0 1 2 3 4 5 6 7 8 9 10
CO
2
Level (ppm)
0 250 500 750 1000 1250 1500 1750 2000
Voltage Output (Vdc) 2345678910