Evikon PluraSens E2611-NH3 User manual

PluraSens®
Ammonia Detector-Transmitter
E2611-NH3
User Manual

E2611-NH3 Rev 10.05.2021
Table of contents
Ammonia 3
Specifications 4
Product description 5
Safety requirements 5
Operating conditions 6
Installation guidelines 6
Installation and connections 7
Operation 10
Maintenance 10
Calibration 10
Delivery set 10
Order code for E2611-NH3 options 11
Configuring 11
Return to default settings 11
RS485 communication interface 12
Modbus registers (0-based, decimal format) 12
Factory settings 13
Warranty 14
Manufacturer contacts 14
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E2611-NH3 Rev 10.05.2021
Ammonia
A colorless gas, highly soluble in water, with a characteristic pungent smell.
Ammonia is a large-scale production of the chemical industry widely used as a raw
material for the production of fertilizers and explosives, as a refrigerant, as a cleaning and
antimicrobial agent.
Ammonia is also produced naturally from the decomposition of organic matter, including
plants and animals.
Chemical formula
NH3
Molar weight
17
Relative gas density (to air)
0.59
Conversion
1 ppm = 0.70 mg/m3
Boiling point
-33.3 °C
Low explosive limit (LEL), % vol. in air
15
Upper explosive limit (UEL), % vol. in air
28
Odor
Characteristic pungent smell
Odor detection threshold
0.04 ppm ...57 ppm according to different studies
Hazards
Ammonia is irritant to the skin, eyes, and respiratory
tract. Ammonia inhalation causes breathing difficulties
(wheezing).High concentrations may lead to pulmonary
edema.
Exposure limits
(Directive 2000/39/EC)
TWA
14 mg/m3/ 20 ppm
STEL
36 mg/m3/ 50 ppm
Conversion of ppm to mg/m3is calculated for 25°C and 1 atm.
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E2611-NH3 Rev 10.05.2021
Specifications
Sampling method
Diffusion
Sensor type
Metal oxide semiconductor
Detection range
0...1000 ppm
Resolution
1 ppm
Response time T90
ca. 60 s
Sensor lifetime
> 5 years
Calibration interval
12 months
Power supply
11...30 VDC (default),
24 VAC or 90...265 VAC as options
Power consumption
< 2 VA
Analog outputs
2 × 4-20 mA / 0-10 V, user settable
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
Cable connections
Screwless spring-loaded terminals
Relay outputs
2 × SPST, max 5 A, 30 VDC / 250 VAC
Default alarm set-points
25 ppm / 35 ppm NH3
Alarm
Buzzer 85 dB
Enclosure
ABS plastic with ventilation slots, wall-mount, IP20
Dimensions
85 × 85 × 37 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
Operating conditions
-40...+50 °C
<95 %RH, without condensation, non-ATEX Normal ambient oxygen level
Avoid strong mechanical shock, vibrations or EMI, Avoid exposure to
corrosive gases or silicone-containing products.
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E2611-NH3 Rev 10.05.2021
Product description
Ammonia Detector-Transmitter E2611-NH3 is intended for early detection of leakages or
accumulation of ammonia in indoor spaces. The instrument is based on a fully calibrated
and temperature compensated semiconductor metal oxide sensor with high repeatability,
stability and long lifetime.
E2611 series devices provide two independent analog outputs OUT1 and OUT2,
user-selectable to 4-20 mA or 0-10 V, proportional to the gas concentration. 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 device is equipped with an acoustic alarm.
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 installation and 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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E2611-NH3 Rev 10.05.2021
Operating conditions
The device should be used in a non-hazardous (non-ATEX -rated) indoor area at the
atmospheric pressure ±10%, <95 %RH, without condensation, and in a basic
electromagnetic environment, where the latter is defined in EN 61326-1. Metal-oxide and
pellistor sensors cannot properly operate in a zero or low oxygen content atmosphere.
Normal ambient oxygen concentration is recommended. Avoid strong mechanical shock
and vibrations. Avoid corrosive atmosphere (H2S, SO2, HCl, Cl2, etc) and volatile silicon
containing materials (silicone rubber/putty, hair grooming materials, adhesives), 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
There are no precise rules or standards to follow when installing gas detectors. The
following points must be taken into account:
●Application (the instrument is intended for leakage control.)
●Properties of the space under investigation (room geometry, direction, and
velocity of airflows, etc.),
●Ammonia is lighter than air, so the sensor should be placed higher than the
potential leakage or formation source.
●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 detector 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 detector should be
distributed evenly in the room.
Do not locate the detector close to ventilation openings and strong air currents. Avoid the
areas without air circulation (corners, niches) as well.
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.
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E2611-NH3 Rev 10.05.2021
Installation and connections
1. Detach the base of the enclosure by gently pulling along four guiding pins.
2. Attach the base to the wall with two screws (see drawings below).
3. Connect the power supply and external devices to the terminal blocks on the PCB
according to the connection diagram below.
Version without PSU Version with PSU
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E2611-NH3 Rev 10.05.2021
Jumpers
J1
OUT1 type (open: 4-20 mA; closed 0-10 V)
J2
OUT2 type (open: 4-20 mA; closed 0-10 V)
X6
Reset Modbus network parameters to default
X4 terminals
OUT1
4-20 mA / 0-10 V output
OUT2
4-20 mA / 0-10 V output
0V
0 V / 24 VAC Neutral (optional)
A
RS485 A / Data +
B
RS485 B / Data -
+U
+24 VDC / 24 VAC Phase (optional)
X5 terminals (optional)
L
90…265 VAC Phase
N
90…265 VAC Neutral
RE1 NO
Relay 1, normally open terminal
RE1 COM
Relay 1, common terminal
RE2 NO
Relay 2, normally open terminal
RE2 COM
Relay 2, common terminal
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E2611-NH3 Rev 10.05.2021
To power the instrument from an external 24 V power source, connect terminals 0 V and
+U to the source. If an integrated mains power supply module is used, connect terminals L
and N to the mains.
NOTE! If the instrument is powered from mains, connect to 0 V and +U terminals only light
external loads, which consume less than 30 mA in total, as the integrated mains supply
module capacity is limited.
To use analog outputs, connect the terminals OUT1 and/or OUT2 and 0 V to the input of
the secondary instrument (indicator or controller).
NOTE! The outputs are not galvanically isolated from the 24 V power supply and share a
common 0 V. Allowed load resistance limits are stated in the Specifications table.
The type of each analog output can be independently changed between 4-20 mA and 0-10
V with jumpers J1 (OUT1) and J2 (OUT2). With a closed jumper, the output is 0-10 V, with
an open jumper the output is 4-20 mA. By default, both outputs OUT1 and OUT2 are
assigned to the gas concentration. The output assignments and scales can be changed by
Modbus commands.
To use relay outputs, connect the chosen actuators to the relay terminals RE1 and/or RE2.
NOTE! Actuator short-circuits shall be avoided, to protect the instrument relays using
external fuses or safety switches.
4. Turn on the power. It may take up to five minutes after switching on for the sensor to
stabilize. During this period relays, analog outputs, and Modbus interface are off. A LED
placed on the PCB of the device allows controlling the connection process. The LED
response to different processes is presented in the table below:
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 the Modbus communication cycle
Short on-off pulses
Normal operating/measurement
Continuously on or off
NOTE! Pulse corresponding to Modbus response is visible only when diode light is on.
5. Push the enclosure to the base.
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E2611-NH3 Rev 10.05.2021
Operation
For best stability, the gas detector should be powered permanently. If the instrument is left
for a long time in an unpowered state, then after initial power-on the metal-oxide gas
sensor needs some time to heat up and burn adsorbed contaminants. So for the first tens
of seconds of a few minutes, an alarm activation may be possible. After this heating-up
period, the instrument turns into normal mode. When the concentration of the detected gas
reaches the LOW alarm level, the control LED starts blinking and the buzzer starts beeping
with 1 Hz frequency. When the HI alarm level is reached, the frequency of blinking/beeping
is 2 Hz. The alarm signal turns off automatically if gas concentration decreases to 80% of
the alarm setpoint.
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
E2611-NH3 detector-transmitters have been calibrated by Manufacturer with standard gas
mixtures before delivery. The instrument requires at least annual field recalibration with a
portable calibration kit. For procedure details please contact your Seller. The calibration
should be preferably performed by the Manufacturer's authorised representative.
Delivery set
●Combustible Gas Detector E2611-NH3
●Mounting accessories:
○2 screws and 2 plastic dowel plugs
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E2611-NH3 Rev 10.05.2021
Order code for E2611-NH3 options
E2611 options
Order code
Integrated 90...265 V mains power supply module
E2611-NH3-230
Integrated 24 VAC power supply module
E2611-NH3-24VAC
Configuring
Gas detector E2611 shares all functionalities of the PluraSens® multifunctional transmitter
platform. The features and options include:
●Digital output change rate limiting filter
●Digital integrating (averaging) filter
●Free assignment of each analog output to 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 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 options for analog outputs and relays.
E2611 can be configured through its RS485 interface by Modbus RTU commands. A
standard configuration kit includes a USB-RS485 converter and Configurator software.
Please contact your Seller or the Manufacturer for more information.
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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E2611-NH3 Rev 10.05.2021
RS485 communication interface
Databits: 8
Parity: none
Stop bits: 1 or 2
Protocol: Modbus RTU
Supported Modbus functions:
03 – Read multiple registers
06 – Write a single register
Modbus registers (0-based, decimal format)
Reg
Description
Supported values
1
Hardware version
Read-only
2
Software version
Read-only
3
Product serial number
Read-only
4
Slave ID (network address)*
1...247, default 1
5
Baud Rate*
1200...57600 baud, default 9600
6
Response delay, ms
1...255 ms, default 10
7
Stop bits*
1 / 2, default 1
17
Restart
Write ‘42330’ for soft restart
162
Temperature shift adjustment
-32000...+32000 T units (0,01 °C)
165
Gas channel shift adjustment
-32000...+32000 gas units, default 0
166
Gas channel slope adjustment
1...65535, default 512
167
Output change rate limit
1...32000 gas units/s, 0=no limit
168
Integrating filter time constant
1...32000 s, 0=no, integrating filter
201
Parameter assigned to OUT1
0=none, 1=T, 2=gas, 9=forced by 203
202
Parameter assigned to OUT2
0=none, 1=T, 2=gas, 9=forced by 204
203
Forced value for OUT1
0...1000 (0.0...100.0% of full scale)
204
Forced value for OUT2
0...1000 (0.0...100.0% of full scale)
211
Parameter assigned to RE1
0=none, 1=T, 2=gas, 9=forced by 213
212
Parameter assigned to RE2
0=none, 1=T, 2=gas, 9=forced by 214
213
Forced state for RE1
0=off, 1=on (relay control by Modbus)
214
Forced state for RE2
0=off, 1=on (relay control by Modbus)
215
Switch delay for RE1
0...1000 s, default 0
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E2611-NH3 Rev 10.05.2021
216
Switch delay for RE2
0...1000 s, default 0
217
Min on/off time for RE1
0...1000 s, default 0
218
Min on/off time for RE2
0...1000 s, default 0
219
Control logic for relay RE1
0:_, 1:_↓↑・P, 2:・P↑↓_, 3:_↑・P↓_, 4:・P↓_↑・P
220
Control logic for relay RE2
0:_, 1:_↓↑・P, 2:・P↑↓_, 3:_↑・P↓_, 4:・P↓_↑・P
221
LOW setpoint for relay RE1
-32000...+32000, gas or T units
222
HIGH setpoint for relay RE1
-32000...+32000, gas or T units
223
LOW setpoint for relay RE2
-32000...+32000, gas or T units
224
HIGH setpoint for relay RE2
-32000...+32000, gas or T units
258
Measured temperature
-4000...+12500 T units (0,01 °C)
259
Gas concentration
0...65535 gas units
261
0% value of OUT1
-32000...+32000 gas units/integer °C
262
100% value of OUT1
-32000...+32000 gas units/integer °C
263
0% value of OUT2
-32000...+32000 gas units/integer °C
264
100% value of OUT2
-32000...+32000 gas units/integer °C
* - the new value is applied after restart
Broadcast ID=0 may be used to assign a new ID to a device with an unknown ID
Factory settings
Target gas
Ammonia
Gas unit
ppm
OUT1 assignment and scale
2: gas, 0 - 1000
OUT2 assignment and scale
2: gas, 0 - 1000
RE1 assignment and logic
2: gas, 1: on at high values
RE1 HIGH setpoint (set)
25
RE1 LOW setpoint (release)
20
RE2 assignment and logic
2: gas, 1: on at high values
RE2 HIGH setpoint (set)
35
RE2 LOW setpoint (release)
28
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E2611-NH3 Rev 10.05.2021
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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