Evikon PluraSens E2670-NH3-E User manual

PluraSens®
Flameproof
Ammonia Detector-Transmitter
E2670-NH3-E
User Manual

E2670-NH3-E Rev 15.03.2023
Table of contents
Ammonia 3
Specifications 4
Product description 6
Safety requirements 6
Operating conditions 7
Installation guidelines 7
Mounting dimensions 9
Electrical connections 10
Correct and incorrect cabling for 24 VAC 12
Operation 13
Maintenance 13
Calibration 13
Delivery set 14
Order code for E2670-NH3-E options 14
Configuring 15
Return to default settings 15
Modbus RTU Communication 16
RS485 communication interface 16
Communication parameters 16
Modbus holding registers 16
Warranty 21
Manufacturer contacts 21
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E2670-NH3-E Rev 15.03.2023
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 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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E2670-NH3-E Rev 15.03.2023
Specifications
Sensor type
Electrochemical cell
Sampling method
Diffusion
Typical detection range
0...100 ppm
0...300 ppm
0...1000 ppm
Max. overload
200 ppm
500 ppm
1500 ppm
Resolution / digital unit
1 ppm
Response time T90
< 75 s
Sensor lifetime
> 2 years
Calibration interval
6 months
Signal update
Every 1 second
Power supply
12...36 VDC (default),
24 VAC or 230 VAC as options
Power consumption
< 2 VA
Analog outputs
2 × 4-20 mA / 0-10 V, user settable
Output scale width
> 10 × resolution
Recommended: 20-100% of the detection range
Outputs assignment
OUT1 2 gas; OUT2 2 gas
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
Cable connections
Screwless spring-loaded terminals
Enclosure
Grey die-cast aluminium, wall mount, protection class IP65
Dimensions
H155 × W145 × D110 mm
H155 × W155 × D110 mm (with one cable gland)
H155 × W165 × D110 mm (with two cable glands)
Protection
Flameproof, ATEX: II 3G Ex d IIC T6 Gc
II 3D Ex tb IIIB Ip65 T85°C Dc
ATEX Approvals
Enclosure:
ATEX / IECEx
FTZU 03 ATEX 0207U
IECEx FTZU 12.0017U
II 2 G Ex db IIC Gb
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E2670-NH3-E Rev 15.03.2023
II 2 D Ex tb IIIC Db
Glands:
ATEX / IECEx
EESF 19 ATEX 023X
II 2G Ex db IIC Gb
II 2D Ex tb IIIC Db IP66
CE marking
According to 2014/30/EU and 2014/34/EU,
EN 61000-6-3:2020, EN 61326-1:2013 (EMC, Emissions)
EN 61000-6-1:2019, EN 61000-6-2:2019, EN 61326-2-1:2013 (EMC,
Immunity)
EN 60079-0:2018, EN 60079-1:2014, EN 60079-31:2014,
EN 60079-29-1:2016, EN 60079-29-2:2015, EN 60079-29-3:2014
Operating conditions
-40...+50 °C, 15...90% RH non-condensing, 0,9...1,1 atm
Explosion-safe zones and ATEX Zones 2 and 22,
Non-aggressive atmosphere
NOTE! The sensor may exhibit considerable sensitivity to hydrogen
sulfide and sulfur dioxide
NOTE! The device is intended for the control of eventual leakages (e.g. in
refrigeration systems). Do not use the device in areas with constantly
high concentration of ammonia.
Relay option
Output relays
2 × SPST relays (closing contact),
250 VAC / 30 VDC, 5 A max
Alarm set-points
Determined by the user within 5-95% of the detection range
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E2670-NH3-E Rev 15.03.2023
Product description
E2670 is a series of flameproof gas detectors-transmitters intended for operation in safe
zones and ATEX Zones 2 and 22. E2670 series devices are based on the PluraSens®
multifunctional platform and provide all its features. The instruments utilize gas sensors of
various types with excellent repeatability, stability, and long lifetime.
The E2670 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,
●24 VAC or 230 VAC as options for power supply.
The version of your detector 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.
It is crucial to tighten properly all the thread connections (screws, cable glands). Use ATEX
certified armored cables or cable conduits that are rated for use in the desired
environment.
A disconnecting device that is marked as such and easily accessible should be included in
the installation of this product.
The device should be properly earthed.
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E2670-NH3-E Rev 15.03.2023
Operating conditions
The device should be used in a basic electromagnetic environment, where the latter is
defined in EN 61326-1. Avoid strong mechanical shock and vibrations. Although E2670
series devices are suitable for use in the presence of flammable dust, special precautions
should be taken when operating in a dusty environment. Dust may block the porous filter of
the sensor and compromise the results of the measurement. The detector should be
inspected regularly if used in a dusty atmosphere. Keep the instrument away from direct
sunlight. A sudden temperature or humidity change might affect the sensitivity of the
sensor. Make sure that installation and maintenance are performed in an explosion safe
atmosphere.
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.),
●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-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.
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E2670-NH3-E Rev 15.03.2023
The device is fixed on the wall using two fixing holes located outside the sealed area of the
device (see dimensional drawing). Unscrew four lid screws and detach the lid from the
detector. Fix the detector on the wall and earth the enclosure using an earthing terminal on
the side of the device.
NOTE! Never perform installation or maintenance in an explosive atmosphere!
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E2670-NH3-E Rev 15.03.2023
Mounting dimensions
Mounting holes
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E2670-NH3-E Rev 15.03.2023
Electrical connections
Unscrew lid from the device. Use the M20 cable gland to let in 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 and digital interface
terminals to the relevant devices according to your tasks.
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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