E2638 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.
E2638 series provides 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.
The following features are available as 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) signalling
Integrated 230 V mains power supply module
LCD indicator
Remote probe.
The version of your device 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
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.
The device is mounted on the wall using four round holes or two key slots (Dimensional
drawing and connection diagrams are presented on a separate sheet.).
Mounting and connection
Dimensional drawing and connection diagrams are presented on a separate sheet.
1. Unscrew four lid screws and detach the lid from the device.
2. Attach the device to the wall. (This step may be done after the step 3, consider
your convenience).
3. 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.
The screwless quick connect spring terminals on the E2638 series devices are
suitable for a wide range of wires with cross-section 0,2...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.
The output assignments and scales can be changed by Modbus commands (see
Annex 1).
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 built-in temperature sensor is intended for temperature
compensation. E2638 series devices are not meant for ambient air temperature
measurement.
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 If you use a version with LCD, only OUT1 is available.
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.
4. Turn on the power. The sensor heating up will take take 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
NOTE For versions with red and green signalling LEDs, the above table describes
the red LED behaviour. The green LED is constantly on while the power is on.
5. Make sure that the device is properly installed, 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.
Remote sensor probe handling
The E2638 series devices are available with remote probe (dimensional drawing is
presented on a separate sheet). 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
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
- 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.
Delivery set
–Detector-transmitter E2638
– Mounting accessories:
4 screws with plastic dowels
fixing clamp for remote probe version
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.
