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Figure 3: Route the Cable From Behind (Left)
and Mount the Wall Plate (Right)
Note: When you bring the cable through the wall, seal
the cable opening. If left unsealed, the hole allows air
from outside the room into the transmitter and affects
the measurement readings. For example, fresh
concrete binds CO
and may cause low readings,
2
especially in new buildings.
Connecting the Cable to the Mounting Base
Connect the wires from the cable to the screw
terminals on the mounting base. The terminal
assignments are marked next to the screw terminals.
Maximum wire size is 2 mm
1. Strip 1/4 in. (6.35 mm) of insulation from the ends
of the power and output signal wires.
Note: To prevent a short circuit from occurring, make
sure that the wires are stripped to the correct length
and fully inserted into the terminal blocks. If using
shielded cable, ensure that the shield is protected from
contact with components on the top or bottom side of
the printed circuit board. Failure to follow proper wiring
procedures may cause the transmitter to fail.
2. Connect the wires to the mounting base screw
terminals as shown in Figure 4.
Power Supply 24 VAC/DC (+)
Power Supply Common (-)
Signal Out 4 to 20 mA (+)
Signal Out 0 to 10 V (+)
Signal Common (-)
Temperature Sensor
Temperature Sensor Common
Figure 4: Screw Terminals
CD-W00-x0-2 Series Wall Mount CO
2
(AWG 14).
+
VS
~
-
+CO2
4...20mA
+CO2
0...10 V
-CO2
t+
and Temperature Transmitters Installation Instructions
2
Note: The transmitter is capable of generating both
voltage and current output. Each output has its own
individual positive screw terminal.
Power Supply Requirements
The transmitter requires a 24 VAC/VDC, Class 2 power
supply. Although the power input includes a halfwave
rectifier, we recommend using a DC supply to avoid
excessive current peaks.
Connections to a 24 VAC Power Supply
Connecting more than one transmitter to a single
24 VAC transformer forms a common loop and
increases the risk of a short circuit. We recommend
that you use a separate floating supply for each
transmitter (see Figure 5).
Supply
24 VAC
voltage
Supply
24 VAC
voltage
Figure 5: Connecting Separate AC Supplies
(Recommended)
If several transmitters share a common transformer,
always connect the transmitter common (-) to the same
side of the transformer to maintain the polarity. A
shared common line at the controller may cause a
short circuit if the phase is not the same (Figure 6).
CO2 Transmitter/
Supply
24V
24 VAC
voltage
CO2 Transmitter/
Supply
24V
voltage
Figure 6: Connecting One AC Supply to Several
Transmitters (Not Recommended)
Completing the Installation
Install the cover on the mounting base:
1. Slide the bottom of the cover onto the tabs at the
bottom of the mounting base.
2. Tilt the top of the cover toward the mounting base.
3
CONTROLLER
CO2 Transmitter/
Module
Signal
mA or V
24V
Common
output
CO2 Transmitter/
Module
Signal
mA or V
24V
Common
output
CONTROLLER
Module
Signal
mA or VA
Common
output
Module
Signal
mA or VA
Common
output
SHARED
COMMON
LINE
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