Evikon PluraSens E2648-ETO User manual

Ethylene oxide
Other names: epoxyethane, ethylene oxide, dimethylene oxide, oxacyclopropane,
1,2-Epoxy ethane. Proper IUPAC name: oxirane.
Highly reactive, toxic and flammable colourless gas.
Ethylene oxide is one of the most important raw materials used in large-scale
chemical production. It is used also as a sterylant and fungicide.
Chemical formula
C2H4O
Molar weight
44
Relative gas density (to air)
1.52
Conversion
1 ppm = 1.80 mg/m3
Boiling point
10.7 °C
Low explosive limit (LEL), % vol in air
3
Upper explosive limit (UEL), % vol in air
100
Odour
Pungent, ether-like
Odour threshold
430 ppm
Hazards
Flammable.
Gas/air mixtures are explosive.
Ethylene oxide is a slow poison with
carcinogenic, mutagenic, irritating, and
anaesthetic effect
Exposure routes are inhalation,
ingestion, (liquid), skin and/or eye
contact.
Exposure limits
(OSHA)
TWA
1 ppm
STEL
5 ppm
Conversion of ppm to mg/m3is calculated for 25°C and 1 atm.
Installation guidelines
(See Installation and connections section for general information.)
Ethylene oxide is 1.5 times higher than air. It is very reactive, so it should be detected as
early as possible.
Calibration
E2648-ETO detectors have been calibrated by Manufacturer with standard gas
mixtures before delivery. Provided that the sensor is used under moderate
conditions,the recommended interval for field recalibration is 6 months. Please
contact your dealer for more information.
E2648-ETO_UM_EN Rev 05.06.2020
Specifications
Sensor type
electrochemical cell
Sampling method
diffusion
Typical detection range
0...20 ppm
0...100 ppm
Maximum overload
100 ppm
200 ppm
Resolution / digital unit
0.1 ppm
1 ppm
Response time T90
< 120 s
<140s
Sensor lifetime
> 2 years
Calibration interval
6 months
Signal update
every 1 second
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
Power supply options
11...30 VDC, 24 VAC or 90...265 VAC
Power consumption
< 2 VA
Analog outputs
2 × 4-20 mA / 0-10 V, user settable
Outputs assignment
OUT1 2 gas; OUT2 2 gas
Outputs scale width
not below 10 × resolution
recommended: 20-100% of the detection range
Cable connections
screwless spring loaded terminals
Enclosure
die-cast aluminium, wall mount, protection class IP66
Dimensions
H120 × W125 × D57 mm
CE marking
according to 2014/30/EU and EN61326-1 requirements
Operating conditions
-20...+50 °C, 15...90% RH non-condensing, 0,9...1,1 atm
explosion safe areas, non-aggressive atmosphere
NOTE The sensor may exhibit sensitivity to carbon
monoxide, toluene and other organic compounds
Relay option
Output relays
2 × SPST relays (closing contact),
250 VAC / 30 VDC, 5 A max
Default alarm setpoints
(set/release)
LOW: 2 ppm/ 1.6 ppm
HIGHt 5 ppm/ 4 ppm
defined by user
within 5-95% of the
detection range
Other options
Remote probe
protection IP65, default cable length 3.0 m;
max height 80 mm, max diameter 65 mm
Evikon MCI OÜ Teaduspargi 7/9, Tartu [email protected]
Tel. [phone] Estonia www.evikon.eu
PluraSens®
Ethylene Oxide Detector-Transmitter
E2648-ETO
User Manual

E2648 series heavy duty 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. Due to its IP66
enclosure of die cast aluminium, the device may be used under harsh conditions.
E2648 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
Integrated 230 V mains power supply module
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.
Mounting dimensions
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, temperture, 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. Do not locate the detector close to ventilation
openings and strong air currents. Avoid the areas without air circulation (corners,
niches) as well. 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 fixed on the wall using two holes located outside the sealed area of the
device (NOTE Dimensional drawings and connection diagrams are presented on a
separate sheet.).
Connections
NOTE Dimensional drawings 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 E2648 series devices are
suitable for a wide range of wires with cross-section 0,2...1,5 mm2. 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 mm2or CAT 5, to connect the device
to RS485 network. Use one pair for A and B wires to connect the transmitter to
Fieldbus 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. The
built-in temperature sensor is intended for temperature compensation. E2648 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 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 Land 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 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
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 IP66 protection class. Place the lid
back and fix it with the screws. The device is ready to use.
Remote sensor probe handling
The E2648 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.
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
Configuring
Detectors- transmitters E2648 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.
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 E2648
–Mounting accessories:
2 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.

NOTES
E2648 basic version
E2648_UM_EN DRAWINGS AND DIAGRAMS
CONNECTION DIAGRAMS
E2648 with relays
Remote probe
DIMENSIONS
Enclosure

E2648_UM_EN. Annex 1. E2648 series Modbus RTU Communication Reference
RS485 communication interface
Databits: 8
Parity: none / odd / even
Stop bits: 1 or 2
Protocol: Modbus RTU
Supported Modbus functions:
03 –read multiple registers
06 –write single register
Communication parameters
Parameter
Permitted values
Default
Supported
baudrates
1200, 2400, 4800, 9600, 19200,
38400, 57600
9600
Data bits
8
8
Parity
none / odd / even
none
Stop bits
1, 2
1
Protocol
Modbus RTU
Modbus functions
03 - read multiple registers
06 - write single register
Error codes
01 –illegal function
02 –illegal data address
03 –illegal data value
04 –slave device failure (details of last error 04
can be read from register 0x0008)
E2648 series Modbus holding registers
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr
Reg / MHR
RW
Description
Supported values (dec)
Default
0x0001
1 / 40002
R
Hardware version
-
0x0002
2 / 40003
R
Software version
-
0x0003
3 / 40004
R
Product serial number
1...65535
-
0x0004
4 / 40005
RW
Slave ID (net address) *
1...247 **
1
0x0005
5 / 40006
RW
Baudrate *
1200, 2400, 4800, 9600, 19200, 38400, 57600
9600
0x0006
6 / 40007
RW
Response delay, ms
1...255
10
0x0007
7 / 40008
RW
Stop bits, parity bit *
1 –no parity bit, 1 stop bit (default after factory reset)
2 –no parity bit, 2 stop bits
3 –odd parity, 1 stop bit
4 –even parity, 1 stop bit
NOTE: 3 and 4 are available starting from the Software version 0x218 (dec. 536)
1
0x0008
8 / 40009
R
Last error code
1...255
-
0x0011
17 / 40018
RW
Restarts counter
write ‘42330’to restart device
-
* –The new value is applied after restart.
** –Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be
the only Modbus instrument in the network. The device will not respond to Master command when addressed by ID 0.
*** –This value is dynamic and not kept in EEPROM after restart

E2648 series Modbus holding registers (part 2)
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr
Reg / MHR
RW
Description
Supported values (dec)
Default
0x00A2
162 / 40163
RW
Zero adjustment for temperature data,
°C × 100
-32000...+32000 (-320,00...+320,00 °C)
0
0x00A5
165 / 40166
RW
Zero adjustment for gas data, ADC
-32000...+32000 ADC units
0
0x00A6
166 / 40167
RW
Slope adjustment for gas data
1...65535
512
0x00A7
167 / 40168
RW
Change rate limit for gas data,
gas unit / s
1...32000, 0 - no limit
0
0x00A8
168 / 40169
RW
Integrating filter time constant, s
1...32000 (seconds), 0 - no filter
0
0x00C9
201 / 40202
RW
Parameter tied to analog output 1
0 –none
1 –temperature
2 –gas concentration
9 –forced Modbus control, value set in MHR / 40204
2
0x00CA
202 / 40203
RW
Parameter tied to analog output 2
0 –none
1 –temperature
2 –gas concentration
9 –forced Modbus control, value set in MHR / 40205
2
0x00CB
203 / 40204
RW
Forced value for analog output 1***
0...1000 (0,0%...100,0% of output scale)
0
0x00CC
204 / 40205
RW
Forced value for analog output 2***
0...1000 (0,0%...100,0% of output scale)
0
0x00D3
211 / 40212
RW
Parameter tied to relay RE1
0 –none
1 –temperature
2 –gas concentration
9 –control by Modbus control, state set in MHR / 40214
2
0x00D4
212 / 40213
RW
Parameter tied to relay RE2
0-none
1 –temperature
2 –gas concentration
9 –control by Modbus control, state set in MHR / 40215
2
0x00D5
213 / 40214
RW
Forced state for relay RE1***
0 –off, 1 –on
0
0x00D6
214/ 40215
RW
Forced state for relay RE2***
0 –off, 1 –on
0
0x00D7
215 / 40216
RW
Switching delay for relay RE1
0...1000 (s)
0
0x00D8
216 / 40217
RW
Switching delay for relay RE2
0...1000 (s)
0
0x00D9
217 / 40218
RW
Minimal on/off time for relay RE1
0...1000 (s)
0
0x00DA
218 / 40219
RW
Minimal on/off time for relay RE2
0...1000 (s)
0
* –The new value is applied after restart.
** –Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be
the only Modbus instrument in the network. The device will not respond to Master command when addressed by ID 0.
*** –This value is dynamic and not kept in EEPROM after restart

E2648 series Modbus holding registers (part 3)
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr
Reg / MHR
RW
Description
Supported values (dec)
Default
0x00DB
219 / 40220
RW
Control logic for relay RE1
0 –none
1 –relay on at high values
2 –relay on at low values
3 –relay on at values within the range
4 –relay on for the values out of the range
0
0x00DC
220 / 40221
RW
Control logic for relay RE2
0 –none
1 –relay on at high values
2 –relay on at low values
3 –relay on at values within the range
4 –relay on for the values out of the range
0
0x00DD
221 / 40222
RW
LOW setpoint for relay RE1
0...65535 (gas units)
see
Specifications
0x00DE
222 / 40223
RW
HIGH setpoint for relay RE1
0...65535 (gas units)
see
Specifications
0x00DF
223 / 40224
RW
LOW setpoint for relay RE2
0...65535 (gas units)
see
Specifications
0x00E0
224 / 40225
RW
HIGH setpoint for relay RE2
0...65535 (gas units)
see
Specifications
0x00FF
255 / 40256
RW
Sensor, analog outputs, LED and buzzer
status
bit[0]=0/1 –sensor present/absent, read-only!
bit[1]=0/1 –analog outputs deactivated/activated,
bit[2]= 0/1 –in case the sensor is absent, turn signaling off/on analog output1,
bit[3]=0/1 –in case the sensor is absent, turn on signaling with low current/high
current on analog output1; if bit[2]==0 this bit will be ignored,
bit[4]=0/1 –in case of sensor absent, turn signaling off/on analog output2
bit[5]=0/1 –in case of sensor absent, turn on signaling with low current/high current on
analog output2; if bit[4]==0 this bit will be ignored,
bit[6]=0/1 –current/voltage output detected on output1, read-only!
bit[7]=0/1 –current/voltage output detected on output2, read-only!
bit[8]=0/1 –LED deactivated/activated,
bit[9]=0/1 –buzzer deactivated/activated
bit[10]=0/1 –LED is on/off in normal condition
bit[11]=0/1 –LED and buzzer syncing off/on with RE1
bit[12]=0/1 –LED and buzzer syncing off/on with RE2
user defined
0x0101
257 / 40258
R
Raw gas sensor data
ADC data 0...4095
0x0102
258 / 40259
R
Measured temperature, °C×100
signed integer, -4000...+12500 (-40,00...+125,00 °C)
0x0103
259 / 40260
R
Gas concentration, gas units
signed integer, -32000...+32000 (gas units)
0x0105
261 / 40262
RW
0% value for analog output 1
-32000...+32000 (gas unit/°C)
user defined
0x0106
262 / 40263
RW
100% value for analog output 1
-32000...+32000 (gas unit/°C)
user defined
0x0107
263 / 40264
RW
0% value for analog output 2
-32000...+32000 (gas unit/°C)
user defined
0x0108
264 / 40265
RW
100% value for analog output 2
-32000...+32000 (gas unit/°C)
user defined
* –The new value is applied after restart.
** –Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be
the only Modbus instrument in the network. The device will not respond to Master command when addressed by ID 0.
*** –This value is dynamic and not kept in EEPROM after restart
NOTE 1 Relay setpoints should be set within 5-95% of the detection
range.
NOTE 2 Sensor absense signalling (bits from [2] to [5]) is available only for
sensors with digital interface ( e.g.-CO2 10K, -O2-L).
NOTE 3 LED/buzzer signalization (if activated):
Detectable sensor
absence or malfunction
0.5Hz (90% off, 10% on) light and/or sound
signal
Relay1 turned on
1 Hz (50% on, 50% off) light and/or sound
signal, depending on bit[8], bit[9] and bit[11]
Relay2 turned on
2 Hz (50% on, 50% off) light and/or sound
signal, depending on bit[8], bit[9] and bit[12]
Modbus response
the light signal is modulated with short on-off
pulses, even single Modbus cycle is visible
Normal operating
continuously on/off depending on bit[10]
NOTE 4 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.