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NS Series CO2 Network Sensors
24- 10424- 6, Rev. E
Installation Instructions
NS-BCN7004-0, NS-BCN7004-2
Applications
The NS Series CO2 Network Sensors are electronic
zone sensors designed to function directly with
Johnson Controls® BACnet® MS/TP digital controllers
in Heating, Ventilating, and Air Conditioning (HVAC)
systems.
These sensors monitor room carbon dioxide (CO2).
This data is transmitted to a field controller on the
Sensor Actuator (SA) Bus.
Applications include Demand Control Ventilation
(DCV) with fresh air and Indoor Air Quality (IAQ), as
part of a system to meet ANSI/ASHRAE Standard
62.1-2010 Ventilation for Acceptable Indoor Air
Quality. For DCV applications, fresh air is brought into
a zone
based on the concentration levels of CO2.
The NS Series CO2 Network Sensors include
DIP switches to set a unique address in averaging
applications. The wires connecting the network sensor
to the controller can be terminated using either a
modular jack or screw terminal block, offering wiring
flexibility.
The NS Series CO2 Network Sensors include an
SA Bus access port for connecting accessories to
access the SA Bus. This feature allows a technician to
commission or service the controller via the network
sensor.
Part No. 24-10424-6, Rev. E
Issued March 2016
IMPORTANT: The NS Series CO
Sensors are intended to provide an input to
equipment under normal operating conditions.
Where failure or malfunction of the network sensor
could lead to personal injury or property damage to
the controlled equipment or other property,
additional precautions must be designed into the
control system. Incorporate and maintain other
devices, such as supervisory or alarm systems or
safety or limit controls, intended to warn of or protect
against failure or malfunction of the network sensor.
IMPORTANT : Le NS Series CO
est destiné à transmettre des données entrantes à
un équipement dans des conditions normales de
fonctionnement. Lorsqu'une défaillance ou un
dysfonctionnement du network sensor risque de
provoquer des blessures ou d'endommager
l'équipement contrôlé ou un autre équipement, la
conception du système de contrôle doit intégrer des
dispositifs de protection supplémentaires. Veiller
dans ce cas à intégrer de façon permanente
d'autres dispositifs, tels que des systèmes de
supervision ou d'alarme, ou des dispositifs de
sécurité ou de limitation, ayant une fonction
d'avertissement ou de protection en cas de
défaillance ou de dysfonctionnement du network
sensor.
Network
2
Network Sensors
2
NS Series CO2 Network Sensors Installation Instructions 1
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North American Emissions Compliance
United States
This equipment has been tested and found to
comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when this equipment is
operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may cause
harmful interference to radio communications.
Operation of this equipment in a residential area
may cause harmful interference, in which case the
users will be required to correct the interference at
their own expense.
Canada
This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
Installation
Special Tools Needed
A 1/16 in. (1.5 mm) Allen wrench or a Johnson Controls
T-4000-119 Allen-Head Adjustment Tool is required
during installation.
Mounting
Note: The NS Series CO2 Network Sensors are
intended to be mounted on a vertically roughed-in
wallbox only; do not attempt to mount the network
sensor on a horizontally roughed-in wallbox.
Location Considerations
Locate the network sensor:
• on a partitioning wall, approximately 5 ft (1.5 m)
above the floor in a location of average
temperature
• away from direct sunlight, radiant heat, outside
walls, outside doors, air discharge grills, or
stairwells; and from behind doors
• away from steam or water pipes, warm air stacks,
unconditioned areas (not heated or cooled), or
sources of electrical interference
Note: The network sensor is shock and vibration
resistant; however, be careful not to drop the unit or
mount it where it could be exposed to excessive
vibration.
The following ambient operating conditions apply:
• Temperature: 32 to 104°F (0 to 40°C)
• Humidity: 10 to 90% Relative Humidity (RH),
noncondensing; 85°F (29°C) maximum dew point
To mount the network sensor to a wallbox:
1. Use a 1/16 in. (1.5 mm) Allen wrench or
Johnson Controls T-4000- 119 Allen-Head
Adjustment Tool to loosen the security screw on
the top of the unit.
2. Insert a coin into the slot next to the security screw
location, pressing the tab that keeps the unit
closed. Then carefully pry the top edge of the
sensor assembly away from its mounting base and
remove.
IMPORTANT: Do not insert tools into the housing.
Be careful not to damage any components when
pushing on the tab.
IMPORTANT: Do not remove the Printed Circuit
Board (PCB). Removing the PCB voids the product
warranty.
Pull out approximately 6 in. (152 mm) of cable fro m the
wallbox, and insert the cable through the hole in the
mounting base.
3. Align the mounting base on the wallbox.
Note: Confirm that the mounting base is positioned
with the proper edge up. The mounting base is
positioned properly when the security screw is located
on the top edge of the base.
4. Secure the mounting base to the wallbox using the
appropriate mounting hardware (field furnished).
5. Wire the network sensor as follows:
SA Bus Wiring: For the modular jack, simply snap
the wiring plug into the jack. See Figure 1 for
modular jack pin number assignments. A modular
jack requires a straight-through, one-to-one
connection (not a crossover). For the screw
terminal block, wire the unit as illustrated in
Figure 2.
Note: Connect to the SA Bus using either the screw
terminal block or the modular jack. Do not use both.
NS Series CO2 Network Sensors Installation Instructions2
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24-Volt Supply Wiring: Connect the
!
Figure 1: Modular Jack Pin Number Assignments
Pin Numb er Assi gnment for
Straight-Th r ough Cabl e
Printed C i r c ui t Board
S
A
P
o
w
e
r
(
N
e
t
w
o
r
k
S
e
n
s
o
r
)
2
3
45
6
1
F
I
G
:
m
d
l
r
_
j
c
k
S
A
+
S
A
-
SA B
us
Commo
n
(To
ol
A
cces
s)
S
A
Power
(T
o
o
l
A
cc
ess
)
Network
Port
A
Bus Co
m
m
o
n
(
Ne
t
wo
rk
Sensor)
Figure 2: Wiring to the Screw Terminal Block
FIG:scrw _trmnl_b lck
24 VAC/VDC, Class 2 power supply required by
the NS Series CO
Network Sensors to the HOT
2
and COM screw terminal block, whether using the
screw terminal block or modular jack for the
SA Bus connection.
IMPORTANT: Do not connect the 24 power
common to the SA Bus common. The SA Bus
common is an isolated signal common.
For more details on wiring and distance guidelines
for the MS/TP Communications Bus, refer to the
MS/TP Communications Bus Technical Bulletin
(LIT-12011034).
CAUTION: Risk of Electric Shock.
Disconnect the power supply before
making electrical connections to avoid
electric shock.
MISE EN GARDE : Risque de décharge
électrique.
Débrancher l'alimentation avant de
réaliser tout raccordement électrique afin
d'éviter tout risque de décharge
électrique.
Main
S
IMPORTANT: Failure to adhere to these wiring
details causes the network sensor to function
incorrectly. You will not be able to connect to the
system using the wireless commissioning converter
or the handheld V ariable Air V olume (V A V) balan cing
tool, and you will not be able to expand the system
with future offerings.
6. Align the tabs on the bottom edge of the mounting
base with the slots on the bottom edge of the
network sensor assembly, and rotate the assembly
onto its mounting base.
Note: For the screw terminal block, be certain that the
terminal block pins align with the holes in the terminal
block.
7. Use a 1/16 in. (1.5 mm) Allen wrench or
Johnson Controls T-4000-119 Allen-Head
Adjustment Tool to tighten the security screw and
fasten the network sensor assembly to the
mounting base.
Note: Do not overtighten the security screw; doing so
may damage the unit.
8. Use the Metasys® Controller Configuration
Tool (CCT) or Facility Explorer Programmable
Controller Tool (FX-PCT) software to commission
the network sensor. Refer to the Controller Tool
Help (LIT-1201114 7) for more details.
NS Series CO2 Network Sensors Installation Instructions 3
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Setup and Adjustments
Figure 3: Setting the DIP Switch Block
FIG:dp_swtch _blck
2
1
4
Off
(Open)
On
(Closed)
Network Sensor Addressing
Table 1 lists the available DIP switch addresses and
the DIP switch settings required to obtain them.
Table 1: Setting the DIP Switch Address
Available
DIP Switch
Addresses
212 Off (Open) Off (Open) Off (Open)
213 Off (Open) Off (Open) On (Closed)
214 Off (Open) On (Closed) Off (Open)
215 Off (Open) On (Closed) On (Closed)
216 On (Closed) Off (Open) Off (Open)
217 On (Closed) Off (Open) On (Closed)
218 On (Closed On (Closed) Off (Open)
219 On (Closed) On (Closed) On (Closed)
Switch 4 Switch 2 Switch 1
CO2 Altitude Compensation
The Johnson Controls NS Series CO2 Network
Sensors ship from the factory calibrated for an altitude
range of 0 to 2,000 ft (0 to 600 m) without
compensation.
For altitudes above 2,000 ft (600 m) where optimum
accuracy of the CO
essential, modify the Offset property of the NS Series
Network Sensors (Zone Quality [ZN-Q] Analog
CO
2
Input [AI]). The Offset represents the local a tmospheric
pressure in hectopascals (hPa). Set the Offset to the
known local pressure or use the local altitude value
listed in Table 2. The factory default value is 978 hPa.
DIP Switch Settings
concentration measurement is
2
As of Release 5.3, the NS Series CO
Network
2
Sensors (Zone Quality [ZN-Q] Analog Input [AI]) in the
CCT and FX-PCT software automatically change the
hPa value entered from Table 2 into the correct Offset
value. The Offset value for the SA Bus device is
labeled ppm; however, it is the proper field to enter the
hPa value found in Table 2. Refer to the Controller T ool
Help (LIT-1201114 7) for more details.
Note: Enter the pressure value only in units of hPa.
The sensor reads the value entered as hectopascals.
The CO
Present V alue may require se veral minutes to
2
settle after changing the Offset value.
Table 2 lists local altitude values.
Table 2: CO2 Altitude Compensation
Altitude Above Sea
Absolute Pressure
Level
Feet Meters in. Hg hPa
-656 -200 30.6 1,038
0 0 29.9 1,013
656 200 29.2 989
1,312 400 28.5 966
1,969 600 27.9 943
2,625 800 27.2 921
3,281 1,000 26.5 899
3,937 1,200 25.9 877
4,593 1,400 25.3 856
5,249 1,600 24.7 835
5,906 1,800 24.1 815
6,562 2,000 23.5 795
7,218 2,200 22.9 775
7,874 2,400 22.3 756
8,530 2,600 21.8 738
9,186 2,800 21.2 719
9,843 3,000 20.7 701
Reset
If the NS Series CO2 Network Sensors need a reset,
cycle the 24-volt power supply. The 15-volt SA Bus
power does not require cycling.
NS Series CO2 Network Sensors Installation Instructions4
Repair Information
If the NS Series CO2 Network Sensor fails to operate
within its specifications, replace the unit. For a
replacement network sensor, contact the nearest
Johnson Controls representative.
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Technical Specifications
NS Series CO2 Network Sensors (Part 1 of 2)
Supply Voltage Non-isolated: 20 to 30 VAC (18 to 30 VDC), Class 2 or Safety Extra-Low Voltage (SELV)
Isolated: 9.8 to 16.5 VDC; 15 VDC Nominal (From SA Bus)
Current
Consumption
Power
Consumption
Terminations Non-isolated Supply: Screw Terminal Block
Sensor
Addressing
Wire Size Modular Jack: 24 or 26 AWG (0.5 or 0.4 mm Diameter); Three Twisted Pair (Six Conductors)
Communication
Rate
CO
2
Measurement
Range
Sensing
CO
2
Accuracy
CO
Sensing
2
Resolution
CO2 Sensing
Response Time
CO2 Sensing
Warm-Up Time
Sensing
CO
2
Long-Term
Stability
Mounting Surface-Mounted or Vertical Wallbox-Mounted: 120 x 80 mm
Ambient
Conditions
Non-isolated: 22 mA Average at 24 VAC; 28 mA Average at 24 VDC
Isolated: 5 mA Maximum, Non-transmitting (From SA Bus)
Non-isolated: Less Than 0.7 W Average
SA Bus: Modular Jack or Screw Terminal Block
DIP Switch Set from 212 to 219; Factory Set at 212
Screw Terminal Block: 18 to 22 AWG (1.0 to 0.6 mm Diameter); 22 AWG (0.6 mm Diameter)
Recommended
Auto-Detect: 9.6k, 19.2k, 38.4k, or 76.8k bps
0 to 2,000 ppm
Plus or Minus the Sum of 40 ppm and 2.0% of the CO2 Reading at 77°F (25°C) and 978 hPa or an
Altitude of 1,000 ft/300 m
Note: All accuracy specifications reflect the testing of the device using high-grade certified gases. This
device is intended for an altitude range of 0 ft/0 m to 2,000 ft/600 m above sea level without
compensation.
Temperature Dependence of Output: -0.35% of the CO2 Reading per 1.8F°/1C° Typical
Pressure Dependence of Output: +0.15% of the CO
Reading per 1 hPa Typical
2
1 ppm
1 Minute (0 to 90%)
Less Than 1 Minute; Less Than 10 Minutes for Full Accuracy
Less Than ±100 ppm Over 5 Years
Operating: 32 to 104°F (0 to 40°C); 10 to 90% RH, Noncondensing; 85°F (29°C) Maximum Dew Point;
700 to 1,200 hPa
Storage: -40 to 158°F (-40 to 70°C); 5 to 95% RH, Noncondensing
NS Series CO2 Network Sensors Installation Instructions 5
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Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.
All other marks herein are the marks of their respective owners. © 2016 Johnson Controls, Inc.
Building Efficiency
507 E. Michigan Street, Milwaukee, WI 53202
NS Series CO2 Network Sensors (Part 2 of 2)
Compliance BACnet International:
BACnet Testing Laboratories™ (BTL) 135-2004 Listed BACnet Smart Sensor (B-SS)
United States:
UL Listed, File E107041, CCN PAZX, Under UL 916, Energy Management Equipment;
FCC Compliant to CFR 47, Part 15, Subpart B, Class A
Canada:
UL Listed, File E107041, CCN PAZX7, Under CAN/CSA C22.2 No. 205, Signal Equipment;
Industry Canada, ICES-003
Europe:
CE Mark – Johnson Controls, Inc., declares that this product is in compliance with the essential
requirements and other relevant provisions of the EMC Directive.
Australia and New Zealan d:
RCM Mark, Australia/NZ Emissions Compliant
Shipping Weight 0.35 lb (0.16 kg)
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damage resulting from misapplication or
misuse of its products.
European Single Point of Contact: NA/SA Single Point of Contact: APAC Single Point of Contact:
JOHNSON CONTROLS
WESTENDHOF 3
45143 ESSEN
GERMANY
JOHNSON CONTROLS
507 E MICHIGAN ST
MILWAUKEE WI 53202
USA
JOHNSON CONTROLS
C/O CONTROLS PRODUCT
MANAGEMENT
NO. 22 BLOCK D NEW DISTRICT
WUXI JIANGSU PROVINCE 214142
CHINA
NS Series CO2 Network Sensors Installation Instructions6
Published in U.S.A. www.johnsoncontrols.com
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