Form: AZ2-OE256-05—EBUS-CO2Sensor-1C.doc Page 1 of 1
Description
The Wall Mounted E-BUS CO
2
Sensor
(OE256-05) is used in conjunction with the
AZ 2 Controller (OE630-23-AZ2) or GPC-
XP Controller (OE338-23-GPCXP) to
monitor and control CO
2
levels in the
building environment.
Some typical applications are:
Demand Control Ventilation
Controlling ventilation in a building
where the occupancy varies
frequently
Controlling ventilation based on CO
2
levels to ensure excess outside air
is not causing energy waste
To ensure good air distribution
throughout building zones
The OE256-05 is used for monitoring room
CO
2
levels and is designed for permanent
wall mounting in the conditioned space. It
connects to the AZ 2 or GPC-XP Controller
using an EBC E-BUS cable. It can be daisy
chained with the 217-02 E-BUS Digital
Room Temperature Sensor for applications
requiring both a room CO
2
sensor and
room temperature sensor.
The OE256-05 CO
2
Sensor uses non-
dispersive infrared (NDIR) technology. The
CO
2
Sensor’s accuracy is 50 ppm @1000
ppm or 2% of the measured value and has
a measurement range of 0-2000 ppm.
Mounting
The OE256-05 CO
2
Sensor utilizes a sub-
base mounting plate with either terminal
blocks or E-BUS connection, providing for
quick and easy mounting and wiring. The
wall-mounted sensor’s sub-base is
compatible with standard junction boxes. A
locking screw secures the assembly to the
wall.
4.54
2.80
0.96
0.80
OE256-05 E-BUS Digital
CO
2
Sensor – Wall Mounted
Technical Data OE256-05 – CO
2
Sensor
Input Power 12-34 VDC Power Consumption 30 mW Maximum Average
1.25 W Peak Power
Operating Temperature
14 to 122 F
Operating Humidity 5-95% RH Non-Condensing
Sample Method Diffusion Or Flow—through
50-100 ml/min
Measurement Range 0 to 2000 ppm
Sensitivity
<20 ppm
Resolution
1 ppm
Analog Output 0-5 VDC Communications E-BUS
One Year Warranty WattMaster reserves the right to change specifications without notice
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