CO2 Room Sensor with Temperature
Installation and Operation
#NSA-HH/CO2-R2-CP-C, NSA-HH/CO2-R2O-CP-C, NSA-HH/CO2-R2SO-CP-C
– 11/14/2019
Specifications subject to change without notice.
Catalog No. 11-808-794-01
Page
4
of
6
3.
Connect wiring to terminal blocks
: Connect wiring for voltage in, signal common, and voltage or current output.
Connect wires for temperature, override switch and/or setpoint, if these configurations are used.
Figure 4
Power Supply
The power supply has to be connected to VIN and COM. COM is considered as system ground. The same ground
reference has to be used for the NSA-HH/CO2-R2 unit and for the DDC/signal receiver.
Connections of the main terminal of NSA-HH/CO2-R2
Shielded cable with 16 to 22AWG conductors is recommended. The cover must be removed to wire the unit’s terminal
blocks.
When using ½” conduit, the strain relief fitting must be removed from the enclosure.
Make sure that any conduit or metal fittings do not come in contact with the circuit board.
