E2658 is a series of flame proof gas detectors-transmitters intended for operation in
safe zones and ATEX Zones 2 and 22.
E2658 series devices are based on PluraSens® multifunctional platform and provide all
its features. The instruments utilise gas sensors of various types with excellent
repeatability, stability and long lifetime.
E2658 series has 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.
An option with relay outputs is available. Two relays RE1 and RE2 with closing dry
contacts can be used to switch alarm sirens, ventilation fans, shut-off valves or other
actuators.
If symbol
is marked on the equipment, consult the documentation for further
information.
Please read this manual carefully before operating!
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.
Make sure that installation and maintenance are performed in the explosion safe
atmosphere.
The device should be properly earthed
It is crucial to tighten properly all the thread connections (screws, cable glands)
Use ATEX certified armoured cables or cable conduits
Avoid strong vibration and mechanical shock
Avoid direct sunlight
Avoid sources of strong electromagnetic interference
Do not use the device in the carbon disulfide containing atmosphere, since it may
damage the sealing gasket
Although E2658 series devises 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 results of
measurement. The detector should be inspected regularly if used in a dusty
atmosphere.
Choosing location
During the installation of the detector 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.
Installation and connections
Never perform installation or maintenance in explosive atmosphere!
Before proceeding with the installation it is mandatory to read carefully the Safety
requirements section and make sure to comply with all listed instructions.
Dimensional drawing and connection diagrams are presented on a separate sheet.
The device is fixed on the wall using two holes located outside the sealed area of the
device (see dimensional drawing).
1. Unscrew four lid screws and detach the lid from the detector.
2. Fix the detector on the wall and earth the enclosure using earthing terminal on the
side of the device. (This step may be done after the step 3, consider your convenience).
3. Use M25 cable gland 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.
Use ATEX certified armoured cables or cable conduits
The screwless quick connect spring terminals on the E2658 series devices are
suitable for a wide range of wires with cross-section 0,5...1,5 mm
2
. We recommend
to strip the wire end by 8...9 mm and 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 mm
2
or CAT 5, to connect the device
to RS485 network. Respect polarity.
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 closed jumper the output
is 0-10 V, with open jumper the output is 4-20 mA. Power restart is required after
changing the position of the jumpers.
By default both outputs OUT1 and OUT2 are assigned to gas concentration. The
device has built-in temperature sensor which may be tied to any of the outputs.
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 output assignments and scales can be changed by Modbus commands. (See
Annex 1 for more information.)
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.
4. 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)
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 operating
Continuous light
5. Make sure that the detector is properly fixed, the external devices connected,
power on and control LED is constantly lit. Place the lid back and fix it with the
screws.
Make certain that the cable gland and the screws fixing the front lid are
properly tightened to ensure the conformity to IP66 protection class. and
ATEX requirements
Make certain than the device is properly earthed.
The device is ready to use.
Configuring
Detectors-transmitters E2658 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
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.
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.