Veris Industries CWLP, CWXP Installation Guide

CWLP, CWXP

Observe precautions for handling static sensitive

4.75"

(121 mm)

1.15"

3.50"

FRONT VIEW

Wall Mounted Environmental CO2 Sensors

with Protocol Communication

Installation Guide Z20 5597- 0G 0316

* The CE mark in dicates RoHS2 com pliance. Plea se refer to the CE D eclaration o f Conformit y for additional details.

NOTICE

• This product is not intended for life or safety applications.

• Do not install this product in hazardous or classied locations.

•

Read and understand the instructions before installing this product.

• Turn o all power supplying equipment before working on it.

• The installer is responsible for conformance to all applicable codes.

If this product is used in a manner not specied by the manufacturer, the protection

provided by the product may be impaired. No responsibilit y is assumed by the manufacturer for any consequences arising out of the use of this material.

Product Identiﬁcation

Local Display

L = LCD X = No display

Temp. Cal. Cer t.

X = None 1 = 1 pt. cal. ce rt.* 2 = 2 pt. cal. ce rt.* 3 = 3 pt. cal. ce rt.*

* Only avail able if temperatu re option is select ed.

Protocol

RH Option

= Protocol

Option

Blank = None 1 = Pushbut ton overrid e 2 = Set poin t slider 3 = Pushbut ton overrid e + set poin t slider

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

Temp. Option

X = No temp. opt ion T = Temp. Transmit ter

Housing

Blank = Clo ud white B = Black

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Dimensions

Speciﬁcations

Input Vol tage Class 2; 12 to 30 Vdc, 24 Vac; 100 mA max . Operating Temperatur e Range No humidit y option: 0 to 50 °C (32 to 122 °F) With humidit y option: 10 to 35 °C (50 to 95 °F) Operating Humidit y Range 0 to 95% RH non- condensing Housing Material High impac t ABS plastic , UL 94 VO Protocol BACnet or Modbus (selectable) Connection 2-wire RS-485 Data Rate Modbus: 9 600, 19200, 38400, 57600, bps (s electable) BACnet: 9600, 19200, 38400, 7680 0, bps (selectabl e) Parity Modbus: No ne/Odd/Even (sele ctable); BACnet: None Address Range 1 to 127

CO2 Transmitter:

Sensor Type Non-dispersive infrared (NDIR) diﬀusion sampling Measurement Range 0 to 5000 pp m Accurac y ± 30 ppm ±5% of mea sured value Repeatability ±20 ppm ±1% of measured value

RH Transmitter Opti on:

HS Sensor Replaceable digitally proﬁled thin-ﬁlm capacitive (32-bit mathematics); U.S. Patent 5, 844,138 Accurac y* ±2% from 10 to 80 % RH; NIST traceable mul ti-point calib ration Reset Rate** 24 hours Stabilit y ±1% @ 20 °C (68 °F) annual ly for two years Hystere sis 1.5% typica l Temperature Coeﬃcient ±0.1% RH/°C above or below 2 5 °C (typical)

Temperature Transmitter O ption:

Sensor Type Solid-state, integrated circuit Accuracy ±0.5 °C (±1 °F) typic al Resolution 0.1°C (0.2 °F) Range 10 to 35 °C (50 to 95 °F)

Relay Contac ts:

1 Form C (SPDT) 1 A@30 Vdc, resist ive; 30 W max. Setpoint Slider Resolutio n Option 1% full scale Override Button Option Remotely readable and resettable

* Speciﬁed accurac y with 24 Vdc sup plied power with rising humi dity. ** Reset rate is the time re quired to recover to 50% RH after exp osure to 90% RH for 24 hours. Note: Rough hand ling and transportatio n may cause a temporary reduc tion of CO2 sensor accuracy. With time, th e ABC functio n will tune the readings back to th e correct accuracy range. The defau lt tuning speed is limited to 30 ppm per week.

Operation

Veris’ CWxP wall mounted sensors with protocol output measure the levels of CO2, RH (if equipped), and temperature (if equipped) of air inside a room. The CO2 sensor employs the Automatic Baseline Calibration (ABC) feature that enables the sensor to operate within accuracy speciﬁc ations for the calibration interval of 5 years. RH e quipped models feature a r eplaceable humidity element (HS2NX or HS2XX), available through Veris. LCD models continuously show the CO2 reading in ppm on the ﬁrs t line of the display. The second line of the display alternates betwe en %RH and temperature readings if the device is equipped with both of these features (RH, non -temperature models continuously show the RH reading; temperature transmitter, non-RH models continuously show the temperature reading). CWxP devices have an on -board relay that trips when the CO2 level reaches the programmable setpoint. The user can override this relay remotely from the controller. On models wit h pushbutton override, press the but ton to change the state of BV4 from 0 to 1; this does not locally override t he relay. To maintain accurate functionality, keep all vents f ree of dust, debris, etc.

Installation

1. Locate the tab at the top of the sensor housing. Using only the minimum required force, press this tab down and pull the cover out ward from the top. Set the cover aside.

2. Locate the tabs at the bottom corners of the sensor housing. Press these tabs and pivot the sensor out ward to remove the sensor and ex pose the backplate. Set the sensor aside.

3. Punch out desired wire openings in the backplate.

Housing, Top View

Tab

devices to avoid damage to the circuitry that is not covered under the factory warranty.

4. Position the sensor vertically on the wall, 4½ feet above the ﬂoor. Locate away from windows, vent s, and other sources of draft. If possible, do not mount on an ex ternal wall, as this might cause inaccurate temperature readings.

5. Mount the backplate onto the wall using the screws provided.

Five screwhole s available; use a minimum o f two for

secure mounting.

6. Wire the back plate.

Wire the RS- 485 connections wi th shielded, twisted-pair wire. Connect the shield at one end only to the RS-4 85 SHIELD terminal.

POWER SUPPLY

12-30VDC, 24VAC

CONTROL SYSTEM

COMMON

RS-485+ RS-485 -

SHIELD K1 N.O.

COMMON K1 N.C.

PWR

GND

RS-485+

RS-485-

SHIELD

K1 N.O.

K1 N.C.

COMMON

Ground each unit via the power supply GND terminal. Grounding is necessar y to minimize common mode voltage on the signal lines and to minimize radio frequency emissions that can interfere w ith the operation of nearby radio equipment.

Daisy-chain devices wit h 120Ω termination resis tors between RS- 485+ and RS-485- on the last device at each end of the chain. Maximum of 63 device s on one daisy chain.

The relay is designated as K1. Both N.O. and N.C. contac ts are available.

1. Conﬁgure the sensor. Set the DIP switches on the backside of the board.

DIP switches,

located on backside of board,

Top row: Address swi tches

Bottom row: Conﬁguration switches

Select Add ress DIP switches

1. Up for Modbus, Down f or BACnet.

2. Up to add 64 to net work address.

3. Up to add 32 to network address.

4. Up to add 16 to network address.

5. Up to add 8 to networ k address.

6. Up to add 4 to network address.

7. Up to add 2 to network address.

8. Up to add 1 to network address.

The networ k address is the sum of the value s selected by placing sw itches 2 through 8 in their UP position. E.g.: If switches are D D D U D U D D, then BACnet communic ation is selected, and the address is 16 + 4, for a total of 20. Valid Modbus addresses are 1 to 127, and valid BACnet addresse s are 0 to 127. Each device on the daisy chain must have a unique address.

Select Conﬁg uration DIP switches

Conﬁguration DIP switches 1 and 2 control the parity settings for Modbus and have no eﬀec t on BACnet communication, which never has parity.

Switch 1 Switch 2 Parity

Down Down None (2 stop bi ts)

Down Up Odd

Up Up Even

Up Down None (1 stop bit ; common but non-s tandard)

Conﬁguration DIP switches 3 and 4 control the data rate for both Modbus and BACnet modes.

Switch 3 Switch 4 Data Rate

Down Down 9600 bp s

Down Up 1920 0 bps

Up Down 38400 b ps

Up Up Modbus: 5760 0 bps; BACnet: 76800 bp s

Modbus Conﬁguration

The list of supp orted Modbus func tion codes and the Modbus Point Map are in the Point Map section of this document. The capabilities for controlling the CWxP are identical with those for BACnet. The functions are summarized here.

Function Description

Coils Used to set tempe rature (Fahrenheit s cale), relay override, over ride button coi l, and

Discrete

input

Input

registers

Holding

registers

* The temperat ure scale and local ca libration locko ut settings are ma intained if power i s lost. When delivered, te mperature in Farenheit a nd calibration lo ckout is on. Pressing th e override butto n turns the override b utton coil on. It can o nly be turned oﬀ remotely.

** If any sensor o ption is not install ed, the reading for t hat sensor will be 0.

local ca libration lockou t. *

Indicate s whether the relay is o n.

Used to conﬁ gure the sensor opt ions: CO2 level (in ppm), RH (in uni ts of 0.1%),

temperat ure (in units of 0.1°), and the slider (in u nits of %full sca le). * *

Used to spe cify the CO

temperat ure oﬀset, and RH o ﬀset. Initial s ettings are 80 0 ppm, 50 ppm, Normal, 0°F, and 0%, respe ctively. Setti ngs are retained i f power is lost.

setpoi nt for the relay, the deadb and,auto-ca libration,

The various registers are still present even without the corresponding options inst alled. In particular, the discrete input func tion can be used to see if the CO2 setpoint has been reache d even if the relay is not in use.

BACnet Conﬁguration

The list of BACnet objects and their implemented prop erties is in the BACnet Descriptions section of this document. The capabilities for controlling t he CWxP are identical with those for the Modbus conﬁguration. However, BACnet has some additional protocol-related settings.

The Device Obje ct must have a unique name. This is s et at the factory to the model name, followed by the device’s serial number. The name can be changed if desired. The device object must also have a unique objec t identiﬁer number. By default, this is 133nnn where nnn is the current network address. This number can be changed and the new number will be remembered. Setting the number to -1 (normally not allowed) will reset the device to the def ault.

The Reliabilit y property of the analog input s for temperature, relative humidity, and slider can be read to determine whether the device has these options installed.

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NITROGEN

GAS

Regulator Valve

ABC Calibration Algorithm

ABC (Automatic Baseline Calibration) is a patented self-calibration feature that automatically adjusts the CO2 sensor to compensate for dr ift. When ABC is enabled, the lowest reading within every 24-hour period is recorded and analyzed over a running 7-day or 28-day per iod. If a statistically signiﬁcant amount of drift is detected, an automatic correction factor is applied. This enables the sensor to operate within speciﬁcations for the 5-year c alibration interval.

There are thre e settings (Modbus holding register 3 o r BACne t Auto_Cal):

0. Normal – recommended set ting! Use for applications in which the building is unoccupied within a 24 hour timeframe. This is the default.

1. Low – use for buildings occupied 24 hour s a day.

2. Oﬀ – Not Recommended

2. Install the sensor onto the b ackplate.

3. When installation is complete, install the cover and snap into place.

No-LCD version LCD version

Visual Indicators

The CAL light will be on continuo usly during calibration.

The RX light will ﬂash while data is being received. If it isn’t blinking, it can indicate a bad connection or that the RS-485+ and RS-485– wires are connected b ackwards.

The TX light will ﬂash while data is being transmitted. For Modbus, if this light isn’t blink ing it can mean that the device isn’t being selected (wrong address) or the communication parity o r bit rate is set improperly.

In a BACnet installation, both the RX and TX lights will ﬂash repeatedly even i f no communication is being per formed. In a Modbus inst allation, no lights will ﬂash if there is no communication ac tivity.

Modbus Point Map

Function codes:

Function code Function

01 Read coils

02 Read discrete inputs

03 Read holding registers

04 Read input regis ters (if any sensor is n ot installed, the r eading for that sens or

will be 0)

05 Write single coi l

06 Write single regis ter

07 Diagnost ics (sub-func tion 00 return s query data)

15 Write multiple coils

16 Write multiple registers

17 Repo rt slave ID (returns man ufacturer, mode l name, and serial numb er)

All of these values corresp ond to BACnet objects with the same name. See the BACnet Descriptions section for deﬁnitions.

Discrete Inputs

1 Relay On (due to reaching setpoint, not due to override)

Coils

1 Fahrenheit (else Celsius)

2 Relay override

3 Cal Loc kout

4 Overr ide (use override but ton to turn on, if pr esent)

Input Registers

1 CO2 level (in ppm)

2 Humidi ty (in tenths of a perc ent) or 0 if not install ed

3 Temperatu re (in tenths of a degre e; units set by coil 1) or 0 if not i nstalled

4 Slider (i n percent) or 0 if not inst alled

Holding Registers

1 CO2 setpoi nt (in ppm CO2)

2 CO2 deadband (i n ppm CO2)

3 Auto Cal (0 =normal; 1=low; 2=oﬀ )

4 Temp Oﬀs et (in tenths of a degre e, current units)

5 RH oﬀs et (in tenths of a percen t)

BACnet Descriptions

All proper ties read-only unless otherwise noted. Preserved means it is non-volatile.

Present_Value Range Restrictions

Object Name Minimum Value Maximum Value

Device_Instance 0 (b ut see descrip tion, above) 4,194,302

CO2_Setpoint 500 2,500

CO2_Deadband 10 500

Auto_Cal 0 2

Temp_Oﬀset -5 5

RH_Oﬀset -10 10

Standard Obj ect Types Supported

Obj ect Type Supported Optional

Analog Input

-- AI

Analog Value

-- AV

Binary I nput

– BI

Binary Value

– BV

Device -- D EV Description*, Location APDU_Timeout, Description, Location, Max_Mas ter,

* Descripti on is the same as the Obj ect_Ident iﬁer. Reliabilit y is “No Sensor” if no se nsor is installed (app lies to humidit y, temperature, and slider).

Properties

Description*, Reliabilit y

Description* Present _Value

Description*

Description* Present _Value

Object_Identiﬁer, Object_Name

Writable Properties

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Objects Table

Object Name Typ e

CO2_L evel AI 1 Gas concentration in ppm

Humidity AI 2 Humidity in percent (if sensor installed)

Temperature AI 3 Temperature in Fahrenheit or Celsius (if sensor installed)

Slider AI 4 Slider posit ion in percent (if pre sent)

Device_

Instance

CO2_Setpoint AV 2 Setpoi nt in ppm. Initial valu e 800. Fractiona l values are trunc ated.

CO2_

Deadband

Auto_Cal AV 4 Auto- calibration. Valid v alues are 0 (normal), 1 (low), or 2 (oﬀ ). Initial value

Temp_Oﬀset AV 5 Te mperature oﬀs et. Value rounded to nea rest tenth of a degr ee. Units are

RH_Oﬀset AV 6 Relative Hu midity oﬀse t. Value rounded to the n earest tenth of a per cent.

Relay_On BI 1 1 if relay ener gized because o f gas concentratio n. BV2 will not aﬀect t his

Fahrenheit BV 1 1 if temperat ure in Fahrenheit, 0 if i n Celsius. Initially 1. (if pr esent)

Relay_

Override

Cal_Lo ckout B V 3 1 will lock-ou t calibration. Ini tially 1.

Override BV 4 1 if over ride button pr essed. Store 0 to res et. Initially 0. Volatil e. (if present)

and

Instance

AV 1 Alternat ive way to change objec t_identiﬁ er property o f device. A negative

value will r estore the defa ult device instanc e (133nnn). Fract ional values are truncated.

AV 3 Relay deadb and in ppm. Initial val ue is 50. Fractional v alues are trunca ted.

is 0.

current u nits. Initial val ue is zero. (if present)

Initial va lue is zero. (if present)

value.

BV 2 1 will f orce relay on. Initial ly 0. Volatile.

Description of Present_Value Property

Page 13

Device Objects Table

Objec t

Name

CWxPxxx

Type and Instance

Device

133nnn

Objec t Property Description

Object_Identiﬁer

(R/W)

Object_Name (R/W) Unique name, i nitially a combinat ion of model and

APDU_Timeout Default is 3000, ma ximum value is 600 00

Max_Master Def ault is 127

Description Maximum length is 64 characters

Location Maximum length is 64 characters

Unique valu e where nnn initiall y is MS/TP

serial number. Maximum length is 64 characters

Page 14

Calibration

CO2 sensor calibration requires a gas calibration ki t, available from Veris Industries. Performing

calibration without the gas kit will cause erroneous readings.

This product is factory-calibrated. The typical CO2 sensor calibration interval is 5 year s, dependent

on speciﬁc si te installation factors. As of the date of this document, compliance with ANSI/ ASHRAE 62-2001 requires minimum on-site accuracy veriﬁcation intervals of 6 months or per the building operation and maintenance manual. Perform accuracy veriﬁcation using a comparison to either a known reference or to the CO2 gas calibration kit available from Veris Industries (Model AA01).

1. Make sure that calibration is unlocked (Modbus/BACnet device setting)

2. Remove cover and conne ct gas cylinder hose to the plastic port loc ated on sensing module. Only connect one sensor to the calibration gas cylinder at a time.

3. Start ﬂowing nitrogen gas (0 ppm CO2). Use a ﬂow rate of 0.3 to 0.5 liter/ minute.

4. Press and hold the CAL but ton until the calibration light turns on continuously (approximately ﬁve seconds). Once the light t urns on, release the button. If the light does not come on, calibration is probably locked and needs to be unlocked ﬁrst.

5. Wait for the light to turn oﬀ, signif ying the end of calibration (approximately ﬁve minutes).

6. Turn oﬀ the gas, and remove the hose. Replace the cover.

7. Optional: lock-out calibration via Modbus/BACnet.

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Connect hose here

ENTER button

Connect hose here

LED indicato r

Conformance Statement

Vendor Name: Veris Industries Product Name: Veris CWxP Environmental Sens or Product Model Number: CWxPx xx Application Software Version: 1 Firmware Revision: x.x BACnet Protocol Revision: 2 Product Description: Environmental Sensor BACnet Standardized Device Proﬁle (Annex L): BACnet Applic ation Speciﬁc Controller (B-ASC) List all BACnet Interoperabili ty Building Blocks Supporte d (Annex K):

DS-RP-B,DS-RPM-B,DS_WP-B,DM-DDB-B,DM-DOB-B,,DM-DCC-B Segmentation Capability: Segmentation not supported Standard Object Types Suppo rted:

No dynamic creation or deletion suppor ted

No proprietary properties or object types

(other information about objects on preceding pages) Data Link Layer Options: MS/ TP master (Clause 9), baud rates: 9600, 19200, 38400, 7680 0 Device Address Binding: Static device binding is not suppor ted. (No client functionality is included). Networking Options: None Character Sets Supported: ANSI X3.4

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