Evikon PluraSens E2608-NO User manual

Nitric oxide
Colourless toxic gas, relatively insoluble in water. When exposed to oxygen
(including air), nitric oxide is converted into nitrogen dioxide.
Chemical formula
NO
Molar weight
30
Relative gas density (to air)
1.03
Conversion
1 ppm = 1.23 mg/m3
Boiling point
-152 °C
Flammability
Nonflammable, but accelerates the
burning of combustible materials.
Odour
Pure NO is odourless, but in the air it
oxidizes to NO2which has a pungent
odour
Hazards
Irritates respiratory tract and eyes, at
high concentrations may cause lung
edema and death.
Exposure limits
(Directive 91/322/EEC)
TWA
30 mg/m3/25 ppm
IDLH (NIOSH)
123 mg/m3/100 ppm
Conversion of ppm to mg/m3is calculated for 25°C and 1 atm.
Installation guidelines
(See Installation and connections section for general information.)
Nitric oxide has practically the same density as air. As it is easily oxidized to form
nitrogen dioxide, the sensor should be placed as close as possible to the gas source.
Calibration
E2608-NO detectors have been calibrated by Manufacturer with standard gas
mixtures before delivery. Provided that the sensor is used under moderate
conditions,the recommended interval for field recalibration is 6 months. 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-NO_UM_EN Rev 06.06.2020
Specifications
Sensor type
electrochemical cell
Sampling method
diffusion
Typical detection range
0...250 ppm
Maximum overload
1000 ppm
Resolution / digital unit
1 ppm
Response time T90
< 40 s
Sensor lifetime
> 12 months
Calibration interval
6 months
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
Load resistance
RL< (Us - 2 V) / 22 mA for 4-20 mA
RL > 250 kOhm for 0-10 V mode
Digital interface
RS485, Modbus RTU protocol
no galvanic isolation
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
Relay otputs
2 × SPST, max 5 A, 30 VDC / 250 VAC
Default alarm setpoints
RE1 (LOW): set 10 ppm, release 8 ppm
RE2 (HIGH):set 25 ppm, release 20 ppm
Cable connections
screwless spring loaded terminals
Enclosure
grey ABS, wall mount, protection class IP65
Dimensions
H85 × W82 × D55 mm
CE marking
according to 2014/30/EU and EN61326-1 requirements
Operating conditions
-30...50 °C, 15...90% RH non-condensing, 0,9...1,1 atm
explosion safe indoor areas, non-aggressive atmosphere
NOTE The sensor may exhibit considerable sensitivity to
hydrogen sulfide and nitrogenr dioxide
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 7/9, Tartu [email protected]
Tel. [phone] Estonia www.evikon.eu
PluraSens®
Nitric Oxide Detector-Transmitter
E2608-NO
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
E2608 series provides two independent analog outputs OUT1 and OUT2, user-
selectable to 4-20 mA or 0-10 V.
RS485 Modbus RTU digital communication interface allows easy instrument
configuration and integration into various automation systems.
Two relays RE1 and RE2 with closing dry contacts can be used to switch alarm sirens,
ventilation fans, shut-off valves or other actuators.
The version of your detector is marked on the package.
If symbol is marked on the equipment, consult the documentation for further
information.
Safety requirements
Misuse will impair the protection of the equipment.
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.
External circuits connected to the equipment should have sufficient insulation rating
according to the environmental conditions and equipment power
A disconnecting device that is marked as such and easily accessible should be
included in the installation of this product.
Operating conditions
The device should be used in explosion-safe areas. Avoid strong mechanical shock,
vibrations or EMI. Avoid corrosive atmosphere and areas highly contaminated with dust,
oil mist etc. Keep the device away from direct sunlight.
See Specification table for more details.
Installation and connections
Before proceeding with the installation it is mandatory to read carefully the Safety
requirements section and make sure to comply with all listed instructions. During the
installation of the device the following points must be considered:
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, temperature, 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 further).
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. Use two M16 cable
glands to let in the cables of the power supply and of the external devices. Attach the
power cable to the device without turning it on. Using the connection diagram
below, connect the analog outputs, digital interface terminals and/or relays to the
relevant devices according to your tasks.
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 use 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 mm2or CAT 5, to connect the device to
RS485 network. Respect polarity.
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 Land 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. Power restart is required after changing
the position of the jumpers.
3. Turn on the power. The sensor heating up takes ca. 60 seconds after switching on.
The operating status is indicated by the LED on the PCB of the device. The LED
response to different processes is presented in the table below.
Process
LED mode
Sensor absence or malfunction
Blinking 0.5 Hz (90% off, 10% on)
Relay 1 turned on
Blinking 1 Hz (50% on, 50% off)
Relay 2 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 operating
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.
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.
NOTE 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.
Configuring
E2608 series devices 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
- switch delays and minimum on/off state durations for each relay
A standard configuration kit includes a USB-RS485 converter and a software pack.
Please contact your Seller 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
Connection diagram

E2608_UM_EN. Annex 1. E2608 series Modbus RTU Communication Reference
RS485 communication interface
Databits: 8
Parity: none / odd / even
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 / odd / even
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 Software 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
-
* —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 reg. 203
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 reg. 204
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
0x0101
257 / 40258
R
Raw gas sensor data
0...4095, ADC units
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
-32000...+32000 (gas unit/°C)
user defined
0x0106
262 / 40263
RW
100% value for analog output 1
-32000...+32000 (gas unit/°C)
user defined
0x0107
263 / 40264
RW
0% value for analog output 2
-32000...+32000 (gas unit/°C)
user defined
0x0108
264 / 40265
RW
100% value for analog output 2
-32000...+32000 (gas unit/°C)
user defined
* —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.