Evikon PluraSens E2638 Series User manual

PluraSens®
Nitrogen Dioxide Detector-Transmitter
E2638-NO2
User Manual

E2638-NO2 Rev 10.03.2021
Table of contents
Nitrogen Dioxide 3
Specifications 4
Product description 6
Safety requirements 6
Operating conditions 7
Installation guidelines 7
Mounting dimensions 8
Sensor probe handling 9
Gas sensor replacement procedures 9
Electrical connections 10
Operation 12
Maintenance 12
Calibration 12
Delivery set 13
Order code for E2638-NO2 options 13
Configuring 14
Return to default settings 14
Modbus RTU Communication 15
RS485 communication interface 15
Communication parameters 15
Modbus holding registers 15
Warranty 20
Manufacturer contacts 20
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E2638-NO2 Rev 10.03.2021
Nitrogen Dioxide
A Colorless toxic gas, relatively insoluble in water. When exposed to oxygen (including air),
nitric oxide is converted into nitrogen dioxide.
Chemical formula
NO2
Molar weight
46
Relative gas density (to air)
1.59
Conversion
1 ppm = 1.88 mg/m3
Boiling point
21.2 °C
Flammability
Powerful oxidize, can cause many organic substances
(wood, paper, oil, etc) to ignite.
Irritates the skin, eyes, and respiratory tract. Exposure to
levels above 100 ppm can cause death due to
asphyxiation from fluid in the lungs. There are often no
symptoms at the time of exposure other than a
transient cough, fatigue, or nausea, but over hours
inflammation in the lungs causes edema.
Odor
Characteristic pungent odor
Odor threshold
0.1 to 0.4 ppm
Hazards
Irritates respiratory tract and eyes, at high
concentrations may cause lung edema and death.
Exposure limits
(NIOSH)
ST REL
1.88 mg/m3/ 1 ppm
IDLH
37.6 mg/m3/20 ppm
Conversion of ppm to mg/m3is calculated for 25°C and 1 atm.
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E2638-NO2 Rev 10.03.2021
Specifications
Sensor type
Electrochemical cell
Sampling method
Diffusion
Typical detection range
0...20 ppm
0...200 ppm
Maximum overload
100 ppm
1000 ppm
Resolution / digital unit
0.1 ppm
1 ppm
Response time T90
< 60 s
<40 s
Operating conditions
-30...50 °C
-20...50 °C
15...90% RH non-condensing, 0,9...1,1 atm
Explosion-safe areas, Non-aggressive atmosphere
NOTE The sensor may exhibit
considerable sensitivity to chlorine
NOTE The sensor may exhibit
considerable sensitivity to Cl2, H2S,
SO2, O3
Sensor lifetime
>24 months
Calibration interval
6 months
Signal update
Every 1 second
Power supply
11...30 VDC,
24 VAC or 90...265 VAC as options
Power consumption
< 2 VA
Analog outputs
2 × 4-20 mA / 0-10 V, user settable
Outputs assignment
OUT1 gas; OUT2 gas
NOTE for LCD version only output 1 is available
Output scale width
> 10 × resolution
Recommended: 20-100% of the detection range
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
Enclosure
Grey ABS, wall mount, protection class IP65
Dimensions
H90 × W145 × D55 mm
(overall dimensions H140 × W145 × D55 mm)
CE marking
According to 2014/30/EU and 2014/35/EU, EN 50491-4-1:2012
EN 61000-6-3:2020, EN 61326-1:2013(EMC, emissions)
EN 61000-6-1:2019, EN 61000-6-2:2019(EMC, Immunity)
EN 60079-29-1:2016, EN 60079-29-2:2015 and EN 60079-29-3:2014
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E2638-NO2 Rev 10.03.2021
Relay option
Output relays
2 × SPST relays (closing contact),
250 VAC / 30 VDC, 5 A max
Default alarm setpoints
(set/release)
RE1 (LOW): 3 /2.4 ppm
RE2 (HIGH): 6 / 4.8 ppm
Determined by user
within 5-95% of the range
Signalling options
Visual
Red and green LEDs
Acoustic alarm
Buzzer 85 dB
LCD indicator option
Operating temperature
0...+50 °C
Display dimensions
72 × 36 mm
Number of digits
3.5, 7-segment
Character height
14 mm
Other features
Backlight
Other options
Remote probe
Protection IP65, default cable length 3.0 m;
max height 80 mm, max diameter 65 mm
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E2638-NO2 Rev 10.03.2021
Product description
E2638 series detectors-transmitters belong to the PluraSens® family of multifunctional
measurement instruments. The instruments utilize gas sensors of various types with
excellent repeatability, stability, and long lifetime.
E2638 series provides two independent analog outputs OUT1 and OUT2, user-selectable to
4-20 mA or 0-10 V, proportional to gas concentrations. RS485 Modbus RTU digital
communication interface allows easy instrument configuration and integration into various
automation systems.
The following features are available as an option:
●Two relays RE1 and RE2 with closing contacts. Relay outputs can be used to
switch alarm sirens, ventilation fans, shut-off valves, or other actuators,
●Acoustic (85 dB buzzer) and visual (red and green LED) signaling,
●24 VAC or 230 VAC as options for power supply module,
●LCD indicator,
●Remote probe.
The version of your device is marked on the package. If the symbol ⚠ is marked on the
equipment, consult the documentation for further information.
Safety requirements
Misuse will impair the protection of the product. 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.
Removal of the PCB from the enclosure voids the warranty. Do not touch the electronic
components directly, as they are sensitive to static electricity.
Connection diagrams can be found in the electrical connections section. The device might
not perform correctly or be damaged if the wrong power supply is connected.
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.
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E2638-NO2 Rev 10.03.2021
Operating conditions
The device should be used both in a non-hazardous area and in a basic electromagnetic
environment, where the latter is defined in EN 61326-1. Avoid strong mechanical shock and
vibrations. Avoid corrosive atmosphere and areas highly contaminated with dust, oil mist,
etc. Keep the instrument away from direct sunlight. A sudden temperature or humidity
change might affect the sensitivity of the sensor.
Installation guidelines
Before proceeding with the installation it is mandatory to read the Safety requirements
section and make sure to comply with all listed instructions. Installation standards EN
60079-29-2 and EN 45544-4 are also recommended for further instructions and related
information about the installation. During the installation of the detector-transmitter 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 airflows, etc.),
●Nitrogen dioxide is ca. 1.6 times heavier than air. The location of the sensor is
determined by operating conditions. Thus, in an underground parking, the NO2
rises to the ceiling with hot exhaustion gases, so the sensor should be located at
1.2...1.5 m from the floor in order to detect potentially dangerous concentration
more quickly.
●The device should be accessible for maintenance and repair.
The aforementioned conditions above will affect the coverage area of the device. however,
the coverage area for a transmitter is usually between 2.5 to 5 meters radius.
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). The recommended sensor position is vertical, pointing
downwards.
For installing the device, attach the device to the wall using provided screws through the
side mounting holes or key slots (see mountains dimensions).
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E2638-NO2 Rev 10.03.2021
Mounting dimensions
Front view
Bottom view
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E2638-NO2 Rev 10.03.2021
Sensor probe handling
The E2638 series devices are available with a remote probe. The remote probe is
connected to the main unit with a shielded cable. The default remote probe cable length is
3 m.
A) Wall mount remote probe with fixing clamp (default version),
B) Remote probe with rubber flange and three self-tapping screws (on request)
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 should be replaced if it gets
strongly contaminated. To replace the PTFE filter, unscrew the sensor head cap and
remove the old filter. Place a new filter into the cap and tighten it again.
NOTE! Never stab or press the filter near its center where the sensor is located since this
may damage the sensor. Do not remove the filter as it may cause the device to show
incorrect values and/or break the sensor.
The recommended orientation of the sensor probe is vertical with the sensor tip pointing
downwards. This prevents the possible accumulation of condensed water on the sensor
protection filter.
Gas sensor replacement procedures
1. Remove the sensor head cap from the device (or the remote probe),
2. Remove the PTFE filter (if it is not removed within the cap),
3. Remove the O-ring rubber,
4. Detach the electrochemical sensor from the device,
5. Insert the new electrochemical sensor inside,
6. Put back the O-ring rubber, PTFE filter, and the head cap, respectively.
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E2638-NO2 Rev 10.03.2021
Electrical connections
Unscrew four lid screws and detach the lid from the device. Use two M16 cable glands to
let in the cables of the power supply and of the external devices. Without turning on the
power, plug the power cable, and connect the analog/relay outputs and/or digital interface
terminals to the necessary devices according to the relevant connection diagram.
Version with PSU and relays Version with PSU and without relays
Version without PSU and with relays Version without PSU and relays
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E2638-NO2 Rev 10.03.2021
The screwless quick connect spring terminals on the E2638 series devices are suitable for
a wide range of wires with a cross-section of 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 the terminal hole. To disconnect, push the
spring-loaded terminal lever, pull the wire out, and release the lever.
Use a twisted-pair cable, e.g. LiYY TP 2×2×0.5 mm2or CAT 5, to connect the device to the
RS485 network. A and B on the device represent DATA+ and DATA- respectively, polarity
must be respected when connecting to an external RS485 network.
Both analog outputs can be independently changed between 4-20 mA and 0-10 V type
using jumpers J1 (OUT1) and J2 (OUT2). By closing pins on a specific jumper the related
output is 0-10 V, with an open jumper the output is 4-20 mA. Power restart is required after
changing the position of the jumpers.
NOTE! The outputs are not galvanically isolated from the external power supply and share
common 0V. Allowed load resistance limits are stated in the Specifications table. To power
the instrument from an external power 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.
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E2638-NO2 Rev 10.03.2021
Operation
Turn on the power. The instrument warm-up time takes about 1 minute after switching on
and the final sensor stabilization time to maximum accuracy takes about 30 minutes. The
operating status is indicated by the LED on the PCB of the device. The control LED (red)
response to different processes is presented in the following table:
Mode
LED mode
During calibration mode or sensor heating
period (if activated)
0.5 Hz (50% on, 50% off)
Relay 1 turned on
Blinking 1 Hz (50% on, 50% off)
Relay 2 turned on
Blinking 2 Hz (50% on, 50% off)
During Modbus communication cycle
Short on-off pulses
Normal operating/measurement
Continuously on or off
Make sure that the detector-transmitter is properly mounted, the external devices
connected, power LED (green) on and control LED (red) constantly lit. Place the lid back
and fix it with the screws. The device is ready to use.
Maintenance
Do not perform any maintenance operation with the power on.
Clean the device with a soft damp cloth. Do not use any abrasive cleaning agents. Do not
immerse the device in water or any cleaning media.
Calibration
E2638-NO2 gas detector-transmitters have been calibrated by the 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.
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E2638-NO2 Rev 10.03.2021
Delivery set
●Detector-transmitter E2638
●Mounting accessories:
○4 screws with plastic dowels
○Fixing clamp for remote probe version
Order code for E2638-NO2 options
E2638 options
Order code
Remote probe, 3 m cable
E2638-NO2-RP33-3
Remote probe, 10 m cable
E2638-NO2-RP33-10
Duct mount option, stem Ø35×L230 mm
E2638-NO2-DM
Integrated 24 VAC power supply module
E2638-NO2-24VAC
Integrated 90...265 V mains power supply module
E2638-NO2-230
Local LCD single value display 36 mm x 72 mm
E2638-NO2-LCD
Remote LCD single value display, wall mount box
115 × 65 × 40mm, 3 m cable
E2638-NO2-RLCD3
Two SPST relays
E2638-NO2-R
Two LEDs (visual alarm)
E2638-NO2-LED
Buzzer (acoustic alarm)
E2638-NO2-B
Self-test button for relays
E2638-NO2-TB
Integrated coreless micropump
E2638-NO2-MP
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E2638-NO2 Rev 10.03.2021
Configuring
A standard configuration kit includes a USB-RS485 converter, fixed flow regulator, gas
tubing with applicators, and a software pack. Please contact your Seller for more
information.
Detectors-transmitters E2638 share all functionalities of the PluraSens® multifunctional
platform. The features and options include:
●Digital output change rate-limiting filter
●Digital integrating (averaging) filter
●Free assignment of each analog output to the chosen parameter
●Flexible setting of analog output scales for each output
●Output zero and slope adjustment for calibration
●Free assignment of each of two relays to the chosen parameter
●Several relay control logic modes
●Switch delays and minimum on/off state durations for each relay
The output scales can be changed by Modbus commands by using the configuration
software and the standard configuration kit (see Modbus RTU Communication).
Return to default settings
To reset the device’s Slave ID, baud rate, and stop bit numbers to factory settings, proceed
as follows:
1. De-energize the device
2. Connect the X6 jumper
3. Turn on the device
4. De-energize the device
5. Disconnect the X6 jumper
6. Turn on the device
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E2638-NO2 Rev 10.03.2021
Modbus RTU Communication
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 a single register
Communication parameters
Parameter
Permitted values
Default
Supported baud rates
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 a 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)
Modbus holding registers
Register addresses are shown 0-based, Address in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in the decimal 1-based format and may
be addressed either from 00001 or 40001 base.
Address
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
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E2638-NO2 Rev 10.03.2021
0x0005
5 / 40006
RW
Baud rate *
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 last data in seconds
(read) / restart (write)
0...65535 s (read),
writing 42330 restarts the
instrument
-
0x00A5
165 /
40166
RW
Zero adjustments 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
units/ s
1...32000, 0 - no limit
0
0x00A8
168 /
40169
RW
Integrating filter time
constant, s
1...32000 (seconds),
0 - no filter
0
Address
Reg / MHR
RW
Description
Supported values (dec)
Default
0x00C9
201 /
40202
RW
Parameter tied to analog
output 1
0 – None
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
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
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E2638-NO2 Rev 10.03.2021
0x00D3
211 /
40212
RW
Parameter tied to relay
RE1
0 –none
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
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
Address
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
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E2638-NO2 Rev 10.03.2021
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, RO
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,
RO
bit[7]=0/1 – current/voltage
output detected on output2,
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E2638-NO2 Rev 10.03.2021
RO
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
0x0101
257 /
40258
R
Raw gas sensor data
0...4095, ADC units
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 units
User
defined
0x0106
262 /
40263
RW
100% value
for analog output 1
-32000...+32000 , gas units
User
defined
0x0107
263 /
40264
RW
0% value
for analog output 2
-32000...+32000, gas units
User
defined
0x0108
264 /
40265
RW
100% value
for analog output 2
-32000...+32000, gas units
User
defined
* – The new value is applied after restart.
** – Broadcast slave ID 0 can be used to assign a new ID to the instrument with an
unknown ID. When addressing by ID 0 the device shall be the only Modbus instrument in
the network. The device will not respond to the Master command when addressed by ID 0.
*** – This value is dynamic and not kept in EEPROM after a restart.
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E2638-NO2 Rev 10.03.2021
Warranty
This product is warranted to be free from defects in material and workmanship for a period
of one year from the date of the original sale. During this warranty period, the Manufacturer
will, at its option, either repair or replace a product that proves to be defective. This
warranty is void if the product has been operated in conditions outside ranges specified by
the Manufacturer or damaged by customer error or negligence or if there has been an
unauthorized modification.
Manufacturer contacts
Evikon MCI OÜ
Teaduspargi 7/9, Tartu
50411 Estonia
[email protected]
www.evikon.eu
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