Johnson Controls NS-BCN7004-0, NS Series, NS-BCN7004-2 Installation Instructions Manual

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

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