CD-Wxx-00-0 Series Wall Mount CO
2
Transmitter Installation Instructions
3
Base
Cover
PCB
Wallbox
Screw
Holes
Center
Hole
Drywall
Screw
Holes
Sensor
Figure 3: Mounting the Transmitter
Wallbox Mounting
To mount the transmitter to a standard wallbox, refer
to Figure 4 and proceed as follows:
1. Pull the wiring through the wallbox and the
transmitter’s base.
2. Rotate the base so the arrow points up.
3. Fasten the base to the wallbox with
two No. 6-32 screws (not provided) using the
curved wallbox mounting holes shown in Figure 1
and Figure 4.
Standard
Wallbox
Base
Two
No. 6-32 Screws
(Not Provided)
Figure 4: Mounting to a Wallbox
4. To install the PCB into the base, refer to Figure 3
and:
•
align the PCB over the latch pins on the base.
•
press down on the board until it snaps into
place and is secured by the latches.
5. Proceed to the
Wiring
section.
Wiring
Power Supply Requirements
The transmitter requires a 24 VAC/VDC, Class 2
power supply maintaining voltages of 18 to 30 VDC or
20 to 30 VAC. Although the power input includes a
halfwave rectifier, to avoid current peaks, use a DC
supply (current consumption: peak 170 mA, average
85 mA).
24 VAC Power Supply Connections
When more than one transmitter is connected to
one 24 VAC transformer a common loop is formed at
the controller and the risk of a short circuit increases.
All commons must be at the same potential.
Note:
To avoid a short circuit, isolate the 24V power
supply by providing a separate transformer for
each transmitter as shown in Figure 5.
~
+
~
-
~
+
~
-
0
Shared
Common
Line
24 VAC Supply
Voltage
CO Transmitter
2
24 VAC Supply
Voltage
Output
Signals
CO Transmitter
2
Controller
V
0
mA
or
V
mA
or
Figure 5: Connecting Separate AC Supplies
(Recommended)
If several transmitters share one transformer, the
phase (~) must always be the same at each
transmitter to maintain polarity. A shared common line
at the controller (see Figure 6) may cause a short
circuit.
0
Shared
Common
Line
Supply
Voltage
CO Transmitter
2
24 VAC
Supply
Voltage
Output
Signals
CO Transmitter
2
Controller
~
+
~
-
~
+
~
-
V
0
mA
or
V
mA
or
Figure 6: Connecting One AC Supply to
Several Transmitters (Not Recommended)
