E+E Elektronik EE895 Manuel utilisateur
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 2
Content
1 General Information...................................................................................................................................... 3
1.1 Explanation of Warning Notices and Symbols ....................................................................................... 3
1.2 Safety Instructions ................................................................................................................................ 4
1.2.1. General Safety Instructions ......................................................................................................................... 4
1.2.2. Intended Use............................................................................................................................................... 4
1.2.3. Mounting, Start-up and Operation................................................................................................................ 4
1.3 Environmental Aspects.......................................................................................................................... 5
1.4 ESD Protection .................................................................................................................................... 5
1.5 Product Description............................................................................................................................... 5
1.6 Operating Principle CO2Measurement ................................................................................................. 5
2 Handling Instructions................................................................................................................................... 6
3 Hardware ....................................................................................................................................................... 6
3.1 Dimensions ........................................................................................................................................... 6
3.2 Mounting Recommendation .................................................................................................................. 7
3.2.1. Mounting via Solder Pads............................................................................................................................ 7
3.2.2. Mounting via Side Plated Contacts .............................................................................................................. 7
3.3 EE895 Block Diagram ........................................................................................................................... 8
3.5 Pin Description...................................................................................................................................... 9
3.6 Electrical Characteristics..................................................................................................................... 11
3.7 Typical Applications............................................................................................................................. 12
3.7.1. EE895 Connected to USB Interface........................................................................................................... 12
3.7.2. EE895 in Battery Powered Devices ........................................................................................................... 12
3.7.3. EE895 Connected to a KNX Bus ............................................................................................................... 13
4 Digital Interface........................................................................................................................................... 13
4.1 I2C Interface........................................................................................................................................ 13
4.1.1. Modbus Protocol Over I2C Interface .......................................................................................................... 13
4.1.2. I2C Simplified Protocol............................................................................................................................... 14
4.2 UART Interface ................................................................................................................................... 16
4.2.1. Modbus Protocol Over UART Interface...................................................................................................... 16
4.3 Modbus Register Map ......................................................................................................................... 17
4.4 General Purpose Registers for Individiual Use.................................................................................... 17
4.5 EE895 Commands .............................................................................................................................. 18
4.5.1. Information ................................................................................................................................................ 18
4.5.2. General Settings........................................................................................................................................ 18
4.5.3. CO2Parameter Settings ............................................................................................................................ 20
5 Technical Data ............................................................................................................................................ 21
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 3
1 General Information
This user manual serves for ensuring proper handling and optimal functioning of the device. The user manual
shall be read before commissioning the equipment and it shall be provided to all staff involved in transport,
installation, operation, maintenance and repair. E+E Elektronik Ges.m.b.H. does not accept warranty and liability
claims neither upon this publication nor in case of improper treatment of the described products.
This document may contain technical inaccuracies and typographical errors. The content will be revised on a
regular basis. These changes will be implemented in later versions. The described product(s) can be improved
and changed at any time without prior notice.
The user manual may not be used for the purposes of competition without the written consent of E+E Elektronik
Ges.m.b.H. and may not be forwarded to third parties. Copies may be made for internal purposes. All information,
technical data and diagrams included in these instructions are based on the information available at the time of
writing.
PLEASE NOTE
Find this document and further product information on our website at www.epluse.com/ee895.
1.1 Explanation of Warning Notices and Symbols
Safety precautions
Precautionary statements warn of hazards in handling the device and provide information on their prevention.
The safety instruction labeling is classified by hazard severity and is divided into the following groups:
DANGER
Danger indicates hazards for persons. If the safety instruction marked in this way is not followed, the hazard
will verly likely result in severe injury or death.
WARNING
Warning indicates hazards for persons. If the safety instruction marked in this way is not followed, there is a
risk of injury or death.
CAUTION
Caution indicates hazards for persons. If the safety instruction marked in this way is not followed, minor or
moderate injuries may occur.
NOTICE
Notice signals danger to objects or data. If the notice is not observed, damage to property or data may
occur.
Informational notes
Informational notes provide important information which stands out due to its relevance.
INFO
The information symbol indicates tips on handling the device or provides additional information on it. The
information is useful for reaching optimal performance of the device.
The title field can deviate from “INFO” depending on the context. For instance, it may also read “PLEASE
NOTE”.
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 4
1.2 Safety Instructions
1.2.1. General Safety Instructions
NOTICE
Improper handling of the device may result in its damage.
▪ The EE895 housing and the circuit board shall not be exposed to unneccessary mechanical stress during
installation and operation. The forces exerted shall not exceed 50 N.
▪ The EE895 electronics is sensitive to electrostatic discharge (ESD), appropriate protective measures shall
be taken when touching it.
▪ Use the EE895 only as intended and observe all technical specifications.
1.2.2. Intended Use
The EE895 miniature sensor module measures the CO2concentration, the temperature (T) and the absolute
barometric pressure (p). It is intended to be used as sensor module in devices for diverse uses in non-condensing
environments. Applications can be , e.g., in building automation, demand controlled ventilation and process
control.
WARNING
Non-compliance with the product documentation may cause safety risk for people and the entire
measurement installation.
The manufacturer cannot be held responsible for damages as a result of incorrect handling, installation and
maintenance of the device.
▪ Do not use EE895 in explosive atmosphere or for measurement of aggressive gases.
▪ This device is not appropriate for safety, emergency stop or other critical applications where device
malfunction or failure could cause injury to human beings.
NOTICE
Failing to follow the instructions in this user manual may lead to measurement inaccuracy and device
failures.
▪ The EE895 may only be operated under the conditions described in this user manual and within the
specification included in chapter 5 Technical Data.
▪ The device may only be powered with safety extra-low voltage (SELV).
▪ Unauthorized product modification leads to loss of all warranty claims.
1.2.3. Mounting, Start-up and Operation
The EE895 has been produced under state of the art manufacturing conditions, has been thoroughly tested and
has left the factory after fulfilling all safety criteria. The manufacturer has taken all precautions to ensure safe
operation of the device. The user must ensure that the device is set up and installed in a way that does not impair
its safe use. The user is responsible for observing all applicable local and international safety guidelines for
safe installation and operation of the device. This user manual contains information and warnings that must be
observed by the user in order to ensure safe operation.
PLEASE NOTE
The manufacturer or his authorized agent can be only be held liable in case of willful or gross negligence.
In any case, the scope of liability is limited to the corresponding amount of the order issued to the
manufacturer. The manufacturer assumes no liability for damages incurred due to failure to comply with the
applicable regulations, operating instructions or the specified operating conditions. Consequential damages
are excluded from the liability.
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 5
WARNING
Non-compliance with the product documentation may cause accidents, personal injury or property damage.
▪ Mounting, installation, commissioning, start-up, operation and maintenance of the device may be
performed by qualified staff only. Such staff must be authorized by the operator of the facility to carry out
the mentioned activities.
▪ The qualified staff must have read and understood this user manual and must follow the instructions
contained within.
▪ All process and electrical connections shall be thoroughly checked by authorized staff before putting the
device into operation.
▪ Do not install or start-up a device supposed to be faulty. Make sure that such devices are not accidentally
used by marking them clearly as faulty.
▪ A faulty device shall be removed from the process.
▪ Service operations other than described in this user manual may only be performed by the manufacturer.
1.3 Environmental Aspects
PLEASE NOTE
Products from E+E Elektronik Ges.m.b.H. are developed and manufactured in compliance with all relevant
environmental protection requirements. Please observe local regulations for the disposal of the device.
For disposal, the individual components of the device must be separated according to local recycling
regulations. The electronics shall be disposed of correctly as electronics waste.
1.4 ESD Protection
The sensing elements and the electronics board are ESD (electrostatic discharge) sensitive components
of the device and must be handled as such. The failure to do so may damage the device by
electrostatic discharges when touching exposed sensitive components.
1.5 Product Description
Beside CO2concentrationupto10 000ppm,theEE895measurestemperature(T)andabsolutebarometric
pressure (p). The active pressure and temperature compensation minimizes the impact of altitude and ambient
conditions on the CO2measured data.
The CO2, T and p measured data is available on I²C or UART digital interfaces. The solder pads, the plated half-
holes and the through-holes allow for various mounting options.
1.6 Operating Principle CO2Measurement
The CO2measurement is based on the dual wavelength Non Dispersive Infra-Red (NDIR) technology which
compensates for ageing effects, is highly insensitive to pollution and offers outstanding long term stability.
Theinfrareddetector1(IR-1)istunedto4.2μm,whichisthewavelenghtabsorbedbyCO2, the infrared detector
2(IR-2)istunedto3.9μm,whichisnotaffectedbyanygas.Foreverysingleflashoftheinfraredlamp(IR-L),the
device calculates the CO2concentration from the outputs of both infrared detectors IR-1 and IR-2. The measuring
interval is user selectable (factory default: 15 s).
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 6
2 Handling Instructions
EE895 is an ESD sensitive device and must be handled with corresponding precautions. Protect the
sensor outside the EPA (Electrostatic Protected Area) using ESD protective packaging.
The EE895 is packed in stacks of ESD trays with 50 pieces each. The tray dimension is 354.2 x 278.6 x
23.8 mm (13.94 x 10.97 x 0.94 inch)
Operating and storage conditions: -40…60 °C (-40…140 °F)
0…95 % RH (non-condensing)
700...1 100mbar(10.15...15.95psi)
NOTICE
Failing to follow the instructions in this user manual may lead to measurement inaccuracy and device
failures.
▪ The EE895 housing and the circuit board shall not be exposed to unneccessary mechanical stress during
installation and operation. The forces exerted shall not exceed 50 N.
▪ The sensor module deploys a fine dust filter for sensing element protection. If the EE895 is deployed in a
device which is designed for harsh environments, the device shall deploy a filter as well.
3 Hardware
3.1 Dimensions
Valuesinmm / inch
Side view Bottom view
19.5 (0.8)
5.4
(0.2)
7.0 (0.3)
27.2 (1.1)
Air inlet through dust filter
towards CO2sensing cell
T / p sensor CO2sensing cell
35.0 (1.4)
15.0 (0.6)
2.54 (0.1)
1.50 (0.06“)
Ø 1.0 (0.04)
T / p sensorThrough-holesPlated half-holes
Recommended PCB footprint
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 7
3.2 Mounting Recommendation
NOTICE
The EE895 is not intended for reflow soldering and consequently it does not feature a moisture sensitivity
level rate (MSL). Nevertheless, for storage and handling it shall be regarded as compatible with MSL 1.
CAUTION
EE895 may only be soldered manually. A max. temperature of 360 °C may be applied for max. 10 s per
solder point.
ESD precautions shall be observed while manually soldering the EE895.
The EE895 can be mounted facing either upwards or downwards.
3.2.1. Mounting via Solder Pads
The EE895 module can be mounted onto a pluggable female header or directly onto the electronics board by
using a pin-header with 2.54 mm (0.1 inch) pitch.
The minimum clearance of 2 mm (0.08 inch) shall be strictly observed. This is necessary for free air flow around
the CO2sensing cell and around the T/p sensor.
T/p sensor
T/p sensor
h>2 mm (0.08")
h>2 mm (0.08")
Air inlet through dust filter
towards CO2sensing cell
male pins
female header
Pluggable
Soldered single pin header
male pins
Fig. 1 Mounting with soldered pin header
3.2.2. Mounting via Side Plated Contacts
The EE895 can be mounted by manually soldering the plated half-holes onto the host board.
T/p sensor
8 mm (0.32")
Air inlet through dust filter
towards CO2sensing cell
Solder
Solder
T/p sensor
Fig. 2 Mounting by soldering at the side plated contacts
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 8
3.3 EE895 Block Diagram
Fig. 3 Block diagram
3.4 Pin Assignment
Bottom view
Fig. 4 Pin assignment
Pin no. Name Type Comment
1VCC_EM Power supply Power supply emitter infra-red lamp (IR-L)
2VCC_IO Power supply Power supply for the microcontroller
3EN Input Enable the module. Tie to Vcc_IO for normal operation
4GND Power supply Ground1)
5GND Power supply Ground1)
6RDY Output Data ready (open drain output)
7ISEL Input Interface selection
8TX / SCL I/O Transmission line (TX) / Serial Clock (SCL)
9RX / SDA I/O Receive line (RX) / Serial Data (SDA)
1) Pins 4 and 5 shall be connected to the same potential.
Tab. 1 Pin assignment
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 9
3.5 Pin Description
Pin 1 - VCC_EM
Power supply for the infrared lamp (IR-L). For optimizing of the energy consumption such as in battery-powered
devices, the IR-L can be powered separately.
The IR-L does not have to be powered continuously, as it needs power supply during the measurement cycle tmeas
only, see Fig. 7. Between the measurement cycles the current consumption of IR-L is approx. 0.1 µA.
Pin 2 - VCC_IO
Power supply for the microcontroller and the digital functional blocks.
Pin 3 – EN (Enable)
For battery-powered devices the user can optimize the energy consumption controlling the status of the EN pin by
an external host controller.
WhentheENpinispulled-downtothelogicLow0(≤0.4V),theinternalvoltageregulatorofEE895isswitched
off and the current consumption is typically 1 µA (max 2 µA).
Whenpulled-uptothelogicstateHigh(≥0.9V),theEE895operatesnormally.
If the energy consumption of EE895 is not relevant, the EN pin shall be connected to VCC_IO.
The EN pin may not be left open.
Pin 6 – RDY (Data ready)
During the measurement cycle (tmeas), when CO2, T and p are measured and processed, the pin RDY is in logic
state High. As soon as data is available for read out, the pin RDY goes to logic state Low. The falling edge at this
pin indicates that measured data is available for reading, see Fig. 5.
If used, an external pull-up resistor is required. If not used, the RDY pin may be left open.
Fig. 5 Timing details (see also chapter 4.5.3. CO2Parameter Settings)
User Manual EE895
Miniature Sensor Module for CO2, Temperature and Barometric Pressure | 10
Pin 7 – ISEL (Interface selection)
The EE895 features I2C and UART interfaces.
Interface selection:
ISEL logic state EE895 interface
Low (0…0.9 V) I2C
High (2.1…5.5 V) or not connected UART
Tab. 2 Interface selection
Serial interface pins:
Pin 8 – TX_SCL Transmission data / Serial clock
Pin 9 – RX_SDA Receiving data / Serial data
The function of pins 8 and 9 depends on the interface selected with pin 7 ISEL.
Pin 7 – ISEL connected to ground: EE895 features I2C interface:
Pin no. Mode Comment
8SCL (serial clock) External pull-up resistor to V+ (bus high voltage level) is required.
9SDA (serial data) External pull-up resistor to V+ (bus high voltage level) is required.
Tab. 3 Pin assignement I2C interface
Example:
Fig. 6 Example I2C interface
Pin 7 – ISEL connected to VCC or left open: EE895 features UART interface:
Pin no. Mode Comment
8TX (transmission line) CMOS compatible (VOutLowMax 0.4 V; VOutHighMin 2.6 V)
9RX (receive line) CMOS compatible (VInputLowMax 0.9 V; VInputHighMin 2.1 V)
Tab. 4 Pin assignment UART interface
Autres manuels pour EE895
2
Table des matières
Autres manuels E+E Elektronik Unité de contrôle
Manuels Unité de contrôle populaires d'autres marques
Festo
Festo Compact Performance CP-FB6-E Manuel de la liste des pièces
Elo TouchSystems
Elo TouchSystems DMS-SA19P-EXTME Manuel utilisateur
JS Automation
JS Automation MPC3034A Manuel utilisateur
JAUDT
JAUDT SW GII 6406 Series Guide rapide
Spektrum
Spektrum Air Module System Manuel utilisateur
BOC Edwards
BOC Edwards Q Series Manuel utilisateur
