Evikon PluraSens E2608-NH3 User manual

RS485 communication interface
Databits: 8
Parity: none
Stop bits: 1 or 2
Protocol: Modbus RTU
Supported Modbus functions:
03 - read multiple registers
06 - write single register
Modbus registers (0-based, decimal format)
Reg Description Supported values
1Hardware version read only
2Software version read only
3Product serial number read only
4Slave ID (network address)* 1...247, default 1
5Baudrate* 1200...57600 baud, default 9600
6Response delay, ms 10...255 ms, default 10
7Stop bits* 1 / 2, default 1
17 Restart write ‘42330’ for soft restart
162 Temperature shift adjustment -32000...+32000 T units (0,01 °C)
165 Gas channel shift adjustment -32000...+32000 gas units, default 0
166 Gas channel slope adjustment 1...65535, default 512
167 Output change rate limit 1...32000 gas units/s, 0=no limit
168 Integrating filter time constant 1...32000 s, 0=no integrating filter
201 Parameter assigned to OUT1 0=none, 1=T, 2=gas, 9=forced by 203
202 Parameter assigned to OUT2 0=none, 1=T, 2=gas, 9=forced by 204
203 Forced value for OUT1 0...1000 (0.0...100.0% of full scale)
204 Forced value for OUT2 0...1000 (0.0...100.0% of full scale)
211 Parameter assigned to RE1 0=none, 1=T, 2=gas, 9=forced by 213
212 Parameter assigned to RE2 0=none, 1=T, 2=gas, 9=forced by 214
213 Forced state for RE1 0=off, 1=on (relay control by Modbus)
214 Forced state for RE2 0=off, 1=on (relay control by Modbus)
215 Switch delay for RE1 0...1000 s, default 0
216 Switch delay for RE2 0...1000 s, default 0
217 Min on/off time for RE1 0...1000 s, default 0
218 Min on/off time for RE2 0...1000 s, default 0
219 Control logic for relay RE1 0:_, 1:_↓↑¯, 2:¯↑↓_, 3:_↑¯↓_, 4:¯↓_↑¯
220 Control logic for relay RE2 0:_, 1:_↓↑¯, 2:¯↑↓_, 3:_↑¯↓_, 4:¯↓_↑¯
221 LOW setpoint for relay RE1 -32000...+32000, gas or T units
222 HIGH setpoint for relay RE1 -32000...+32000, gas or T units
223 LOW setpoint for relay RE2 -32000...+32000, gas or T units
224 HIGH setpoint for relay RE2 -32000...+32000, gas or T units
258 Measured temperature -4000...+12500 T units (0,01 °C)
259 Gas concentration 0...65535 gas units
261 0% value of OUT1 -32000...+32000 gas units / integer °C
262 100% value of OUT1 -32000...+32000 gas units / integer °C
263 0% value of OUT2 -32000...+32000 gas units / integer °C
264 100% value of OUT2 -32000...+32000 gas units / integer °C
* - the new value is applied after restart
Broadcast ID=0 may be used to assign a new ID to device with unknown ID
E2608-NH3_UM_EN Rev 18.02.2016
Specifications
Detection range 0...1000 ppm NH3
Resolution 1 ppm NH3
Accuracy ± 5 ppm NH3
Response time ~10 seconds
Warm-up time ~2 minutes , depending on
unpowered period and atmosphere
Sensor type semiconducting metal-oxide
lifetime > 5 years
Sampling method diffusion
Analog outputs 2 × 4-20 mA or 0-10 V
Load resistance
for 4-20 mA output mode: RL< (Us- 3V) / 22 mA
for 0-10 V output mode: RL> 100 kOhm
Operating conditions -30...+70 °C, 0...99 %RH
Power supply 11...30 VDC
with integrated mains supply module 90...265 VAC
Power consumption < 2 VA
Electromagnetic compatibility according to 2004/108/EEC,
2014/30/EU and EN61326-1 requirements
Wall-mount enclosure oyster white ABS 82×85×55 mm, IP65
Relays 2 × SPST, max 5A, 30 VDC / 250 VAC
Factory settings
Target gas Ammonia NH3
Gas units ppm
OUT1 assignment and scale 2: gas, 0 - 1000 ppm
OUT2 assignment and scale 2: gas, 0 - 1000 ppm
RE1 assignment and logic 2: gas, 1: on at high values
RE1 HIGH setpoint (set) 25 ppm
RE1 LOW setpoint (release) 20 ppm
RE2 assignment and logic 2: gas, 1: on at high values
RE2 HIGH setpoint (set) 35 ppm
RE2 LOW setpoint (release) 28 ppm
Evikon MCI OÜ 7 Teaduspargi , Tartu [email protected]
Tel [phone] Estonia www.evikon.eu
PluraSens®
Ammonia Detector-Transmitter
E2608-NH3
User Manual

Description
E2608-NH3 is intended for detection of ammonia in confinded
spaces. Toxic concentrations of ammonia may be reached as a result
of leakage or generation.
The instrument is based on fully calibrated, linearised and
temperature compensated semiconducting metal-oxide gas sensor
with high repeatability, stability and long lifetime. The sensor exhibits
high sensitivity to ammonia.
E2608 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. Two relays RE1 and
RE2 with closing contacts can be used to switch 24 V or 230 V
powered alarm sirens, ventilation fans, shut-off valves or other
actuators.
Installation and connections
The gas detector should be mounted on a wall at a place, located not
more than 5 m from possible ammonia ource and not very close to
ventilation openings. It is advisable to place NH3Detector just below
the ceiling, with the sensor pointing downwards.
Fix the detector on a wall by screws, using either mounting lugs or the
mounting plate, supplied with the instrument.
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 Nto the mains.
NB! If the instrument is powered from mains, connect to 0V and +U
terminals only light external loads, which consume less than 30 mA in
total, as the integrated mains supply module capacity is limited.
To use analog outputs, connect the terminals OUT1 and/or OUT2 and
0V to the input of the secondary instrument (indicator or controller).
NB! The outputs are not galvanically isolated from 24 V power supply
and share common 0V. Allowed load resistance limits are stated in
Specifications table.
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.
To use relay outputs, connect the chosen actuators to the relay
terminals RE1 and/or RE2. NB! Actuator short-circuits shall be
avoided, to protect the instrument relays use external fuses or safety
switches.
Operation
For best stability the gas detector shall be powered permanently. If
the instrument is left for a long time in unpowered state, then after
initial power-on the metal-oxide gas sensor needs some time to heat
up and burn adsorbed contaminants. So for first tens of seconds of
few minutes an alarm activation may be possible. After this heating-
up period the instrument turns into normal mode.
Configuring
Gas detector E2608 shares 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 (HI or LO with hysteresis, U or П)
- switch delays and minimum on/off state durations for each relay
- Modbus controlled forced state option for analog outputs and relays.
E2608 can be configured through its RS485 interface by Modbus
RTU commands. A standard configuration kit includes Model E1087
USB-RS485 converter and E26XX Configurator software. For
procedure details please refer to the configuration manual and
protocol description PluraSens_Modbus.
Calibration
E2608-NH3has been calibrated by Manufacturer with standard gas
mixtures before delivery. The semiconductor gas sensor exhibits high
stability and ~10 year lifetime. However, as the gas sensor is directly
exposed to environment, the instrument requires at least annual field
recalibration with a portable calibration kit. For procedure details
please refer to the calibration manual E26XX_CM. The calibration
should be preferably performed by Manufacturer's authorised
representative.
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.
82 55
8527
4
40
94
99 73
68
4-20 mA / 0-10 V
4-20 mA / 0-10 V
0V / GND
OUT1
OUT2
0V
A
BRS485
+U = 11...30 VDC
RE1
RE2
Fieldbus
24 VDC
S
N
L90...265 VAC
J2 - OUT2 typeJ1 - OUT1 type