E2608 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
E2608 series provides two independent analog outputs OUT1 and OUT2, user-
selectable to 4-20 mA or 0-10 V.
RS485 Modbus RTU digital communication interface allows easy instrument
configuration and integration into various automation systems.
Two relays RE1 and RE2 with closing dry contacts can be used to switch alarm sirens,
ventilation fans, shut-off valves or other actuators.
The version of your detector 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 and connections
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.
1. Wall mount version:Attach the detector to a wall by screws, using cross-shaped
mounting lugs supplied with the instrument (see dimensional drawing further).
Duct mount version: Cut hole with a diameter of 36...45 mm in the air duct at the chosen
mounting place. Place the rubber flange aligning the holes in the flange and the air-duct
and fix the flange with four self-tapping screws. Pass the sensor probe through the
flange and adjust it to the appropriate depth.
2. Unscrew four lid screws and detach the lid from the detector. Use two M16 cable
glands to let in the 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, digital interface terminals and/or relays to the
relevant devices according to your tasks.
The screwless quick connect spring terminals on the E2608 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 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.
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 type of each analog output can be independently selected with the appropriate
jumper (J1 for OUT1 and J2 for OUT2). With jumper open, the output type is 4-20 mA.
With jumper closed, the output type is 0-10 V. Power restart is required after changing
the position of the jumpers.
3. 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)
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
4. Make sure that the detector is properly mounted, 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.
Sensor probe handling
The wall mount version of the transmitter is available with remote probe (see drawing
below for dimensions). 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
E2608 series devices 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
Connection diagram
