Evikon E2608-CO2-10K User manual

Carbon dioxide
Synonyms: Carbonic acid gas, Carbonic anhydride, Carbon (IV) oxide; Dry ice (in
solid state).
Chemical formula CO2
Molar weight 44
Relative gas density (to air) 1.52
Conversion 1 ppm = 1.80 mg/m3
Boiling point Sublimes
Flammability Nonflammable
Odour Odourless
Hazards Dusts of various metals (Mg, Zr, Ti, Al,
Cr, Mn) are ignitable and explosive when
suspended in carbon dioxide.
In concentrations up to 1% (10 000
ppm), it will make some people feel
drowsy and give the lungs a stuffy
feeling. Concentrations of 7% to 10%
(70 000 to 100 000 ppm) may cause
suffocation, even in the presence of
sufficient oxygen, manifesting as
dizziness, headache, visual and hearing
dysfunction, and unconsciousness within
a few minutes to an hour.
Exposure limits
(Directive 2006/15/EC)
TWA 9000 mg/m3 /5000 ppm
STEL Not specified
Conversion of ppm to mg/m3 is calculated for 25°C and 1 atm.
Indoor air quality in nonresidential buildings
CO2 level Description
< 450 ppm High quality (fresh air)
450-600 ppm Medium quality
600-1000 ppm Moderate quality
> 1000 ppm Low quality
Installation guidelines
(See Installation and connections section for general information.)
Since CO2 is heavier than air, it is recommended to locate the sensor not higher, than
the potential leakage. For air quality control place the sensor in the breathing zone.
Calibration
E2608-CO2 series devices have been calibrated by Manufacturer with standard
gas mixtures before delivery. Provided that the sensor is used under moderate
conditions, field recalibration is recommended every 5 years. Please contact your
dealer for more information.
Maintenance
Do not perform any maintenance operation with the power on.
Clean the device with soft damp cloth. Do not use any abrasive cleaning agents. Do
not immerse the device into water or any cleaning media.
Delivery set
–Detector-transmitter E2608 (wall mount or duct mount version)
– Mounting accessories:
4 cross-shaped mounting lug with screws and 4 screws with plastic dowels
for wall mount version
rubber flange for duct mount version
fixing clamp for remote probe versions
E2608-CO2-10K_UM_EN Rev 11.07.2019
Specifications
Sensor type optical (NDIR)
Sampling method diffusion
Detection range 0...10 000 ppm
Resolution / digital unit 1 ppm
Accuracy ± (50 ppm + 3% of reading)
in the range 300...5000 ppm
Response time T90 ca. 2 minutes
Sensor lifetime ca. 10 years
Calibration interval up to 5 years
Signal update every 1 second
Power supply options 11...30 VDC, 24 VAC
or 90...265 VAC (with mains power unit)
Power consumption < 2 VA
Analog outputs 2 × 4-20 mA / 0-10 V, user settable
Outputs assignment OUT1 2 gas; OUT2 2 gas
Output scale width > 10 × resolution
Recommended: 20-100% of the detection range
Digital interface RS485, Modbus RTU protocol
no galvanic isolation
Load resistance RL < (Us - 2 V) / 22 mA for 4-20 mA
RL > 250 kOhm for 0-10 V mode
Relay otputs 2 × SPST, max 5 A, 30 VDC / 250 VAC
Alarm setpoints Determined by user within 5-95% of the detection range
Cable connections screwless spring loaded terminals
Enclosure light grey ABS, wall or duct mount, protection class IP65
Dimensions H85 × W82 × D55 mm
Operating conditions 0...+50 °C, 0...85 %RH; atmospheric pressure ±10%*
non ATEXrated areas, non-aggressive atmosphere
CE marking according to 2014/30/EU and EN61326-1 requirements
Other options
*Ambient pressure
compensation option in the range 0,5...2 bar of absolute pressure
Warranty
This product is warranted to be free from defects in material and workmanship for a
period of one year from the date of original sale. During this warranty period
Manufacturer will, at its option, either repair or replace product that proves to be
defective. This warranty is void if the product has been operated in conditions outside
ranges specified by Manufacturer or damaged by customer error or negligence or if
there has been an unauthorised modification.
Evikon MCI OÜ Teaduspargi 7, Tartu [e-mail]
Tel. [phone] Estonia www.evikon.eu
PluraSens®
Carbon Dioxide Detector-Transmitter
E2608-CO2-10K
User Manual

E2608-series detectors-transmitters belong to the PluraSens® family of
multifunctional measurement instruments. The instruments utilise gas sensors of
various types with excellent repeatability, stability and long lifetime
The devices are supplied either in duct-mount or wall-mount version. The wall mount
version of the device is available with remote probe. The remote probe is connected to
the main unit with shielded cable. Default connection cable length is 3 m.
E2608 series provides two independent analog outputs OUT1 and OUT2, user-
selectable to 4-20 mA or 0-10 V, proportional either to gas concentration or temperature.
RS485 Modbus RTU digital communication interface allows easy instrument
configuration and integration into various automation systems.
Two relays RE1 and RE2 with closing contacts can be used to switch 24 V or 230 V
powered alarm sirens, ventilation fans, shut-off valves or other actuators.
The version of your detector is marked on the package.
Safety requirements
Always adhere to the safety provisions applicable in the country of use.
Do not perform any maintenance operation with the power on. Do not let water or
foreign objects inside the device.
Operating conditions
The device should be used in explosion-safe (non ATEX -rated) indoor areas, without
aggressive gases in the atmosphere. See Specification table for more details.
Installation and connections
There are no precise rules or standards to follow when installing the gas detectors. The
following points must be taken into account:
application (air quality control or leakage detection),
properties of the space under investigation (room geometry, direction and velocity of
air flows etc),
detected gas (relative density to air, whether the gas is flammable, or toxiс, or oxygen
displacing),
safety: strong vibrations, mechanical shock, and the sources of strong
electromagnetic interference should be avoided,
the device should be accessible for maintenance and repair.
For early leakage detection install the sensor as close as possible to the potential
leakage sources (flanges, valves, pressure reducers, pumps, etc), taking into
consideration other points listed above. For general area monitoring without definite
leakage sources, the detectors should be distributed evenly in the room. For personal
safety control the detectors are installed in the breathing zone (at the height of the head
of people or animals). Recommended sensor position is vertical, pointing downwards.
See Installation guidelines section for more information.
1. Wall mount version:Attach the detector to a wall by screws, using cross-shaped
mounting lugs supplied with the instrument (see dimensional drawing above).
Duct mount version: Cut hole with a diameter of 36...45 mm in the air duct at the chosen
mounting place. Place the rubber flange aligning the holes in the flange and the air-duct
and fix the flange with four self-tapping screws. Pass the sensor probe through the
flange and adjust it to the appropriate depth.
2. Unscrew four lid screws and detach the lid from the detector. Attach the power cable
to the device without turning it on. Using the connection diagrams below, connect
the analog outputs, digital interface terminals and/or relays to the relevant devices
according to your tasks.
4-20 mA/ 0-10 V
4- 20 mA/ 0-10 V
0V / GND
OUT1
OUT2
0V
A
BRS485
+U = 11...30 VDC
RE1
RE2
Fieldbus
24VDC
S
N
L90 ... 265 VAC
J3
Cont rol LED
J1 J 2
J1 UT1 type: O (open: 4-20 mA; closed: 0-10 V)
J UT type2: O 2 (open: 4-20 mA ; closed: 0-10 V)
J3: return to factory settings
The screwless quick connect spring terminals on the E2608 series devices are suitable
for a wide range of wires with cross-section 0,2...1,5 mm2. We recommend to strip the
wire end by 8...9 mm and tin it, or to use the wire end sleeves.
To connect the wire, insert the wire end into terminal hole. To disconnect, push the
spring loaded terminal lever, pull the wire out, and release the lever
Use twisted pair cable, e.g. LiYY TP 2×2×0,5 mm2 or CAT 5, to connect the device to
RS485 network. Use one pair for A and B wires and the second pair for common 0 V
and power +U wires to connect the transmitter to Fieldbus network. Respect polarity.
Overall length of all connections via RS485 interface should not exceed 1200 m.
Note The outputs are not galvanically isolated from 24 V power supply and share
common 0V. Allowed load resistance limits are stated in Specifications table. To power
the instrument from an external 24 VDC source, connect terminals 0V and +U to the
source. If the integrated mains power supply module is used, connect terminals L and N
to the mains.
Note Actuator short-circuits should be avoided, to protect the instrument relays use
external fuses or safety switches.
The type of each analog output can be independently selected with the appropriate
jumper (J1 for OUT1 and J2 for OUT2). With jumper open, the output type is 4-20 mA.
With jumper closed, the output type is 0-10 V.
By default both outputs OUT1 and OUT2 are assigned to gas concentration. The device
has a built-in temperature sensor which may be tied to any of the outputs.
The output assignments and scales can be changed by Modbus commands.
3. Turn on the power. The sensor heating up may take up to five minutes after switching
on. A LED placed on the PCB of the device allows to control the connection process.
The LED response to different processes is presented in the table below.
Process LED mode
Sensor heating period Blinking 0.5 Hz (50% on, 50% off)
Sensor absence or malfunction Blinking 0.5 Hz (90% off, 10% on)
Relay1 turned on Blinking 1 Hz (50% on, 50% off)
Relay2 turned on Blinking 2 Hz (50% on, 50% off)
Modbus response The signal is modulated with short on-off pulses,
even single Modbus cycle is traceable
Normal measurement Continuous light
4. Make sure that the detector is properly mounted, the external devices connected,
power on and control LED is constantly lit. Make certain that the cable glands are
properly tightened to ensure the conformity to IP65 protection class. Place the lid back
and fix it with the screws. The device is ready to use.
It is recommended to keep the device powered constantly, except for periods of
maintenance and calibration, deplacement etc.
Sensor probe handling
The wall mount version of the transmitter is available with remote probe (see drawing
below for dimensions). The remote probe is connected to the main unit with shielded
cable. Default connection cable length is 3 m.
The sensor probes of all types are equipped with a hydrophobic microporous PTFE filter
to protect the sensor from dust, dirt and water drops. The filter may be replaced if it gets
strongly contaminated. To replace the PTFE filter, unscrew the M25 nut and remove
the old filter. Place a new filter into the nut and tighten it again.
NB! Never stab or press the filter near its centre where the sensor is located since this
may damage the sensor.
The recommended orientation of sensor probe is vertical with the sensor tip pointing
downwards. This prevents possible accumulation of condensed water on the sensor
protection filter. The horizontal orientation is also suitable. Avoid upward position of the
sensor tip.
Configuring
Gas detectors E2608 share all functionalities of the PluraSens® multifunctional
transmitter platform. The features and options include:
- digital output change rate limiting filter
- digital integrating (averaging) filter
- temperature measurement channel with internal sensor
- free assignment of each analog output to chosen parameter
- flexible setting of analog output scales for each output
- output shift and slope adjustment for calibration
- free assignment of each of two relays to chosen parameter
- several relay control logic modes (HI or LO with hysteresis, U or П)
- switch delays and minimum on/off state durations for each relay
- Modbus controlled forced state option for analog outputs and relays.
E2608 can be configured through its RS485 interface by Modbus RTU commands. A
standard configuration kit includes Model E1087 USB-EIA485 converter and a software
pack. Please contact your Seller or the Manufacturer for more information.
Return to default settings
To reset the device’s Slave ID, baudrate and sbit number to factory settings, proceed as
follows:
1. De-energize the device 2. Connect the J3 jumper
3. Turn on the device 4. De-energize the device
5. Disconnect the J3 jumper 6. Turn on the device
RS485 communication interface
See Annex 1
36
77
Ø35...36 Ø50
120°
Ø 65 80
327
Ø34 max
Hole
35
55
200
M16
Ø35
2 03
M25
35
8287
82 55
8727
M25
Wall mount version
Duct mount version
94
99 73
68
With mounting lugs

E2608_UM_EN. Annex 1. E2608 series Modbus RTU Communication Reference
RS485 communication interface
Databits: 8
Parity: none
Stop bits: 1 or 2
Protocol: Modbus RTU
Supported Modbus functions:
03 - read multiple registers
06 - write single register
Communication parameters
Parameter
Permitted values
Default
Supported
baudrates
1200, 2400, 4800, 9600, 19200,
38400, 57600
9600
Data bits
8
8
Parity
none
none
Stop bits
1, 2
1
Protocol
Modbus RTU
Modbus functions
03 –read multiple registers
06 –write single register
Error codes
01 –illegal function
02 –illegal data address
03 –illegal data value
04 –slave device failure (details of last error 04
can be read from register 0x0008)
E2608 series Modbus holding registers
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr
Reg / MHR
RW
Description
Supported values (dec)
Default
0x0001
1 / 40002
R
Hardware version
-
0x0002
2 / 40003
R
Software version
-
0x0003
3 / 40004
R
Product serial number
1...65535
-
0x0004
4 / 40005
RW
Slave ID (net address) *
1...247 **
1
0x0005
5 / 40006
RW
Baudrate *
1200, 2400, 4800, 9600, 19200, 38400, 57600
9600
0x0006
6 / 40007
RW
Response delay, ms
1...255
10
0x0007
7 / 40008
RW
Stop bits, parity bit *
1 –no parity bit, 1 stop bit (default after factory reset)
2 –no parity bit, 2 stop bits
3 –odd parity, 1 stop bit
4 –even parity, 1 stop bit
NOTE: 3 and 4 are available starting from the Sofrware version 0x218 (dec. 536)
1
0x0008
8 /40009
R
Last error code
1...255
-
0x0011
17 / 40018
RW
Technological: age of data in seconds (read) /
restart(write)
0...65535 s (read), 42330(write)
writing 42330 restarts the device, response on Modbus will follow,1.5 seconds should
be waited for restart to be completed in every case
-
* —The new value is applied after restart.
** —Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be the only Modbus instrument in the network.
The device will not respond to Master command when addressed by ID 0.
*** —This value is dynamic and not kept in EEPROM after restart

E2608 series Modbus holding registers (part 2)
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr
Reg / MHR
RW
Description
Supported values (dec)
Default
0x00A2
162 / 40163
RW
Zero adjustment for temperature data,
°C × 100
-32000...+32000 (-320,00...+320,00 °C)
0
0x00A5
165 / 40166
RW
Zero adjustment for gas data, ADC
-32000...+32000 ADC units
0
0x00A6
166 / 40167
RW
Slope adjustment for gas data
1...65535
512
0x00A7
167 / 40168
RW
Change rate limit for gas data,
gas unit / s
1...32000, 0 - no limit
0
0x00A8
168 / 40169
RW
Integrating filter time constant, s
1...32000 (seconds), 0 - no filter
0
0x00C9
201 / 40202
RW
Parameter tied to analog output 1
0 –none
1 –temperature
2 –gas concentration
9 –forced Modbus control, value set in MHR / 40204
2
0x00CA
202 / 40203
RW
Parameter tied to analog output 2
0 –none
1 –temperature
2 –gas concentration
9 –forced Modbus control, value set in MHR / 40205
2
0x00CB
203 / 40204
RW
Forced value for analog output 1***
0...1000 (0,0%...100,0% of output scale)
0
0x00CC
204 / 40205
RW
Forced value for analog output 2***
0...1000 (0,0%...100,0% of output scale)
0
0x00D3
211 / 40212
RW
Parameter tied to relay RE1
0 –none
1 –temperature
2 –gas concentration
9 –control by Modbus control, state set in MHR / 40214
2
0x00D4
212 / 40213
RW
Parameter tied to relay RE2
0 –none
1 –temperature
2 –gas concentration
9- –control by Modbus control, state set in MHR / 40215
2
0x00D5
213 / 40214
RW
Forced state for relay RE1***
0 –off, 1 –on
0
0x00D6
214/ 40215
RW
Forced state for relay RE2***
0 –off, 1 –on
0
0x00D7
215 / 40216
RW
Switching delay for relay RE1
0...1000 (s)
0
0x00D8
216 / 40217
RW
Switching delay for relay RE2
0...1000 (s)
0
0x00D9
217 / 40218
RW
Minimal on/off time for relay RE1
0...1000 (s)
0
0x00DA
218 / 40219
RW
Minimal on/off time for relay RE2
0...1000 (s)
0
* —The new value is applied after restart.
** —Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be the only Modbus instrument in the network.
The device will not respond to Master command when addressed by ID 0.
*** —This value is dynamic and not kept in EEPROM after restart

E2608 series Modbus holding registers (part 3)
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr
Reg / MHR
RW
Description
Supported values (dec)
Default
0x00DB
219 / 40220
RW
Control logic for relay RE1
0 –none
1 –relay on at high values
2 –relay on at low values
3 –relay on at values within the range
4 –relay on for the values out of the range
0
0x00DC
220 / 40221
RW
Control logic for relay RE2
0 –none
1 –relay on at high values
2 –relay on at low values
3 –relay on at values within the range
4 –relay on for the values out of the range
0
0x00DD
221 / 40222
RW
LOW setpoint for relay RE1
0...65535 (gas units)
see
Specifications
0x00DE
222 / 40223
RW
HIGH setpoint for relay RE1
0...65535 (gas units)
see
Specifications
0x00DF
223 / 40224
RW
LOW setpoint for relay RE2
0...65535 (gas units)
see
Specifications
0x00E0
224 / 40225
RW
HIGH setpoint for relay RE2
0...65535 (gas units)
see
Specifications
0x00FF
255 / 40256
RW
Sensor, analog outputs, LED and buzzer status
bit[0]=0/1 –sensor present/absent, read-only!
bit[1]=0/1 –analog outputs deactivated/activated,
bit[2]=0/1 –in case the sensor is absent, turn signaling off/on analog output1,
bit[3]=0/1 –in case the sensor is absent, turn on signaling with low current/high
current on analog output1; if bit[2]==0 this bit will be ignored
bit[4]=0/1 –in case of sensor absent, turn signaling off/on analog output2
bit[5]=0/1 –in case of sensor absent, turn on signaling with low current/high current
on analog output2; if bit[4]==0 this bit will be ignored
bit[6]=0/1 –current/voltage output detected on output1, read-only!
bit[7]=0/1 –current/voltage output detected on output2, read-only!
bit[8]=0/1 –LED deactivated/activated
bit[9]=0/1 –buzzer deactivated/activated
bit[10]=0/1 –LED is on/off in normal condition
bit[11]=0/1 - 1 Hz (50% on, 50% off) LED signal off/on if relay1 turned on
bit[12]=0/1 - 2 Hz (50% on, 50% off) LED signal off/on if relay2 turned on
user defined
0x0100
256 / 40257
R
Raw temperature data, °C×100
signed integer, -4000...+8500 (-40,00...+85,00 °C)
0x0101
257 / 40258
R
Raw gas sensor data
ADC data 0...4095
0x0102
258 / 40259
R
Measured temperature, °C×100
signed integer, -4000...+12500 (-40,00...+125,00 °C)
0x0103
259 / 40260
R
Gas concentration, gas units
0...65535, gas units
0x0105
261 / 40262
RW
0% value for analog output 1
signed integer, -32000...+32000 (ppm / ‰)
0
0x0106
262 / 40263
RW
100% value for analog output 1
signed integer, -32000...+32000 (ppm / ‰)
1000
0x0107
263 / 40264
RW
0% value for analog output 2
signed integer, -32000...+32000 (ppm / ‰)
0
0x0108
264 / 40265
RW
100% value for analog output 2
signed integer, -32000...+32000 (ppm / ‰)
1000
* —The new value is applied after restart.
** —Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be the only Modbus instrument in the network.
The device will not respond to Master command when addressed by ID 0.
*** —This value is dynamic and not kept in EEPROM after restart
NOTE 2 Sensor absense signalling (bits from [2] to [5]) is available only
for sensors with digital interface ( e.g.-CO2 10K, -O2-L).
NOTE 3 LED/buzzer signalization (if activated):
Detectable sensor
absence or malfunction
0.5Hz (90% off, 10% on) light and/or sound
signal
Relay1 turned on
1 Hz (50% on, 50% off) light and/or sound
signal, depending on bit[8], bit[9] and bit[11]
Relay2 turned on
2 Hz (50% on, 50% off) light and/or sound
signal, depending on bit[8], bit[9] and bit[12]
Modbus response
the light signal is modulated with short on-off
pulses, even single Modbus cycle is visible
Normal operating
continuously on/off depending on bit[10]
NOTE 4 We recommend to set the difference between the upper and
bottom limits of the output scale not narrower than 20% of detection
range (for CO detectors the scales down to 5% of range are allowed). In
any case, do not set the output scale below the tenfold resolution of the
device.
NOTE 1 Relay setpoints should be set within 5-95% of the detection
range.