Veris Industries CW PROTOCOL SERIES Data Sheet

Air Quality / Gas Detection | Deluxe Duct & Wall CO2 Sensors, Protocol Communication

CW PROTOCOL SERIES

Individual or 3-in-1 with Modbus or BACnet
Protocol

CWLP

CWXP

CW Protocol Series is a non-dispersive infrared (NDIR) sensor designed
for measuring CO
living spaces. Its measurement range of 0 to 5000 ppm makes it the
premier solution for meeting ASHRAE and other ventilation efficiency
standards.

CW Protocol devices feature embedded BACnet and Modbus
communication protocols, as well as optional temperature and humidity
sensors. An adjustable setpoint relay is provided for direct control and
alarm applications, and the optional setpoint slider and pushbutton
override offer additional local input.

concentration in ventilation systems and indoor

2

Communicating

Embedded BACnet and Modbus
communication protocols…easy
systems integration

Configurable
baud rates

Configurable to multiple baud
rates…transfer data at the
right speed for the system

CO2, RH, temp

CO2, humidity, and temperature
sensors in one device at one
address…provides more
information and maximizes
system capacity

APPLICATIONS

• Controlling ventilation in
response to occupancy

Feature override

Local feature override capability
from the building control
system…added control and
flexibility

Self-calibrating

Innovative self-calibration
algorithm…maximizes
performance. Field calibratable…
minimizes downtime.

NIST or standard

Available with 2% NIST or
2% standard RH

• Office buildings, conference
rooms, schools, retail stores, etc.

SPECIFICATIONS

Input Power

Operating Temp Range

Operating Humidity Range 0 to 95% RH non-condensing

Housing Material High impact ABS plastic, UL 94 V0

Terminal Block Torque 0.22 N-m (2.0 in-lbf) max.

Terminal Block Wire Size 30 to 18 AWG (0.08-0.5mm2)

Protocol BACnet or Modbus (selectable)

Connection 2-wire RS-485

Data Rate

Parity

Address Range 1 to 127

Setpoint Slider Resolution
Option

Override Button Option Remotely readable and resettable

Class 2; 12 to 30 Vdc, 24 Vac 50/60 Hz; 100 mA
max.

No humidity option: 0 to 50 °C (32 to 122 °F);
With humidity option: 10 to 35 °C (50 to 95 °F)

9600, 19200, 38400, 57600 (Modbus),
bps (selectable);
9600, 19200, 38400, 76800 (BACnet),
bps (selectable)

None/Odd/Even (selectable-Modbus); None
(BACnet)

1% full scale

CO2 TRANSMITTER

Sensor Type

Measurement Range 0 to 5000 ppm

Accuracy* ±30 ppm ±2% of measured value

Repeatability ±20 ppm ±1% of measured value

RH TRANSMITTER OPTION

HS Sensor

Accuracy**

Reset Rate*** 24 hours

Stability ±1%@ 20 °C (68 °F) annually for two years

Hysteresis 1.5% typical

Temperature Coefficient ±0.1% RH/°C above/below 25 °C (typical)

TEMPERATURE TRANSMITTER OPTION

Sensor Type Solid-state, integrated circuit

Accuracy ±0.5 °C (±1 °F) typical

Non-dispersive infrared (NDIR) diffusion
sampling

Replaceable digitally profiled thin-film
capacitive ; (32-bit mathematics); U.S. Patent
5,844,138

±1% from 12 to 60% RH; ±2% from 10 to 80%
RH; NIST traceable multi-point calibration

TM

HQ0001721.F 0117

Relay N.O.

Relay N.C.

COMMON

(89 mm)

Air Quality / Gas Detection | CW Protocol Series

SPECIFICATIONS, CONT.

Resolution 0.1 °C (0.2 °F)

Range 10 to 35 °C (50 to 95 °F)

RELAY CONTACTS

1 Form C (SPDT) 1 A@30 Vdc, resistive; 30 W max.

WARRANTY

Limited Warranty 5 years

AGENCY APPROVALS

†

EMC Conformance: Low voltage directive 2014/35/EU and EMC directive 2014/30/EU.
EMC Special Note: Connec t this product to a DC distribution network or an AC/DC power
adaptor with proper surge protection (EN 61000-6-1:2007 specification requirements)
* Measured at NTP
** Specified accuracy with 24 Vdc supplied power with rising humidity.
*** Reset rate is the time required to recover to 50% RH after exposure to 90% RH for 24
hours.
† The CE mark indicates RoHS2 compliance. Please refer to the CE Declaration of Conformit y
for additional details.
Note: Rough handling and transportation may cause a temporar y reduction of CO
accuracy. With time, the ABC function will tune the readings back to the correct accuracy
range. The default tuning speed is limited to 30 ppm per week.

WIRING DIAGRAM DIMENSIONAL DRAWING

+

POWER SUPPLY

12 to 30 Vdc, 24 Vac

-

CONTROL SYSTEM

COMMON

-

RS-485+
RS-485 -

SHIELD
K1 N.O.

COMMON
K1 N.C.

3.5"

4.8"

(122 mm)

1.2"

(30 mm)

sensor

2

PWR

GND

RS-485+

RS-485-

SHIELD

ORDERING INFORMATION

Local

Display

CW

L = LCD
X = No Display

Example:

CW

Protocol

P= Protocol

H

T X 3PL

RH Optio n

X = No RH
2 = RH 2% NIST
H = RH 2%

Temp. Option

X = No Temp
T = Temp Transmitte r

*Only available if temperature option is selected.

Temp Cal. Cer t.

X = None
1 = 1 pt. cal. ce rt.*
2 = 2 pt. cal. ce rt.*

Option

Blank = Non e
1 = Pushbut ton override
2 = Set point s lider
3 = Pushbut ton override
+ setpoi nt slider

Housing

Blank = Clo ud white
B = Black

HQ0001721.F 0117

TM