elsner elektronik SO250-UI User manual

SO250-UI
Tank Sensor
Item number 70152
Technical specifications
and installation instructions
Elsner Elektronik GmbH Control and Automation Technology
Sohlengrund 16 | 75395 Ostelsheim | Germany
Tel.: [phone] / 30 945-0 | Fax: [phone]
[email protected] | www.elsner-elektronik.de
Technischer Service: +49 (0) 70 33 / 30 945-250

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
2
The SO250-UI ultrasound sensor is used to detect the liquid content of tanks and for
distance measurements. Besides applications in areas such as rainwater storage tanks
or heating oil tanks, the sensor can also be used in fish tanks or fountains, as well as for
monitoring the parking distances between heavy goods vehicles. Please follow the
“Instructions for assembly and operation” on page 4.
The distance/content level can be directly read off the display of the output device. The
integrated keyboard allows the tank geometry and data output to be input (Modbus
interface, current output, voltage output and two relay switch outputs). Switching a
relay can additionally trigger an acoustic alarm signal.
Functions:
•Distance measurement
•Content measurement in spherical, rectangular and cylindrical shaped tanks.
Several tanks of the same type set up as a battery
•Current output
•Voltage output
•2 relay switch outputs for automatic filling/drainage and/or overfill/empty
warnings, or for triggering fault warnings
•Modbus interface with configurable address, data transfer rate, parity checking
Technical specifications
Evaluation device
Housing: Plastic
Colour: White
Installation: Series installation on DIN rail
Protection rating: IP 20
Dimensions: approx. 123 x 89 x 61 (W x H x D, mm), 7 width units
Weight: approx. 360 g
Ambient temperature: Operating -5…+45 °C, Storage -25…+70°C
Ambient air humidity: max. 95% rH, avoid condensation
Operating voltage: 230 V AC / 50 Hz
Power consumption: max. 4 W
The product conforms with the provisions of EC guidelines
EMC Directive 2004/108/EC
Low Voltage Directive 2006/95/EC
The following standards and/or technical specifications have been applied:
EN 50491-5-1: 2010
EN 50491-5-2: 2011Air-ultrasound sensor

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 3
Housing: Plastic
Colour: Black
Protection category: IP 52
Chemical resistance: Water, heating oil
Dimensions: Overall diameter approx. 60 mm,
overall sensor head height approx. 45 mm,
thread 1½ inches
Connector cable: RG 58 coaxial cable with BNC plug
10 m length, can be extended to max. 40 m
Total weight: approx. 400 g
Ambient temperature: +0…+40 °C
Measurement range: 12…250 cm
Installation and commissioning
Installation, testing, operational start-up and troubleshooting
should only be performed by an electrician.
DANGER!
Risk to life from live voltage (mains voltage)!
There are unprotected live components within the device.
• National legal regulations are to be followed.
• Ensure that all lines to be assembled are free of voltage and take precautions against
accidental switching on.
• Do not use the device if it is damaged.
• Take the device or system out of service and secure it against unintentional use, if it
can be assumed, that risk-free operation is no longer guaranteed.
The device is only to be used for its intended purpose. Any improper modification or
failure to follow the operating instructions voids any and all warranty and guarantee
claims.
After unpacking the device, check it immediately for possible mechanical damage. If it
has been damaged in transport, inform the supplier immediately.
The device may only be used as a fixed-site installation; that means only when
assembled and after conclusion of all installation and operational start-up tasks and
only in the surroundings designated for it.
Elsner Elektronik is not liable for any changes in norms and standards which may occur
after publication of these operating instructions.

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
4
Instructions for assembly and operation
Evaluation device:
Must only be installed and operated in dry, indoor spaces.
Avoid condensation.
Ultrasonic probe:
Do not cause any mechanical stress on the front part (rubber)!
The measuring head must be dry:
It must not be washed by liquids!
No condensation, no droplet formation!
The measuring track must be free:
No steam, fog, etc. between the sensor and the measuring surface.
Steam is formed e.g. when a warm fluid is poured into a tank.
The measured surface must be still:
No waves, no vibrations!

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 5
The measuring track is aligned vertical to the sensor surface. The measuring track has
to meet the measuring surface vertically, too.
To avoid wave formation in fluids, the measured area can be separated using a
measuring tube (Ø at least 50 mm). Please note: the measuring area is only calm as
long as the end of the tube is below the surface of the liquid.
Area must not be hermetically
sealed so that the fluid level in
the tube may change.
Loud surrounding noise (e.g. when filling metal tanks) may disrupt the measurement.
Please contact us with any questions regarding the area of application or installation.
90°
90°
Sensor
Measuring
track
Measuring surface

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
6
Connection
Ensure that the unit is correctly connected. Incorrect connection may lead to the
destruction of the tank sensor or electronic equipment connected to it.
Casing
1 measurement sensor connection, + / shield
2 Current output, Iout /
3 Voltage output, Uout /
4 Modbus interface, A / B /
5 Operating voltage input 230 V AC, L / N
6 Relay output 1 (NO contact), 13 / 14
7 Relay output 2 (NO contact), 23 / 24
All connections are suitable for solid conductors up to 1.5 mm² or fine wire conductors

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 7
Modbus transmission protocol
Applicable protocol: Modbus RTU
SO 250-UI Modbus inquiry string from master
Byte
no.
Variable Explanation
0 Slave address xx
1 Command 04H Read Input Registers
2 Start Address High Byte xx
3 Start Address Low Byte xx
4 Word Count High Byte xx
5 Word Count Low Byte xx
6 CRC High Byte xx
7 CRC Low Byte xx
SO250-UI Modbus output string to master
Byte
no.
Start
Address
Variable Explanation
0 Slave address xx
1 Command 04H Read Input Registers
2 Byte Count xx Master requirement * 2
3 0 Measurement value H
4 1 Measurement value L 0 … 100%
5 2 Relay 1 H
6 3 Relay 1 L 1 = On, 2 = Off
7 4 Relay 2 H
8 5 Relay 2 L 1 = On, 2 = Off
9 6 Error H
10 7 Error L 0 = Measurement value ok, 1 = Error
11 CRC H
12 CRC L

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
8
Operation
Display main menu
Main menu:
or
The display indicates the currently measured distance and/or tank content (depending
on the setting). Where no measurement is possible, the message "No echo received!"
appears.
The following settings can be applied using the keypad:
•Distance measurement
•Content measurement
•Interfaces (Modbus, current output, voltage output, relay)
•Acoustic signal
The display will dim after 60 seconds if no key is pressed during this time.
Key functions in display menu
key: Confirms the selection, moves to the next step.
key: One step back.
and keys: Changes a setting (selects a setting or changes a value). The
cursor (the blinking rectangle) indicates the selected menu
item.
key: Confirms the settings and returns to the device main menu.
Distance measurement
The SO250-UI Tank Sensor can detect distances. The following settings can be applied
in the “Distance measurement” menu:
•Distance display unit
•Measurement time interval
SO250
-
UI
T
a
n
k
S
e
nsor
Tank content:
4885 litres
Settings >
SO250
-
UI
T
a
n
k
S
e
nsor
Distance: 59.4cm
Settings >

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 9
Main menu:
or
Press the key once to access the “Settings” area.
Move the cursor (the blinking rectangle on the right)
to the ”Distance measurement” menu item using the
and keys, and press the key.
Move the cursor to the desired setting using the or
keys. You can display distances in millimetres
(mm), centimetres (cm) or metres (m). Confirm your
selection using the key.
Use the and keys to set the desired time interval
for your measurements.
Settings options: From 1 s to 9 s in one-second increments, from 10 s to 50 s in ten-
second increments, from 1 min to 120 min in 10-minute increments.
Confirm your selection using the key. You will automatically return to the basic
settings.
Content measurement
The SO250-UI Tank Sensor can measure a tank's liquid contents. Possible tank shapes
include rectangular, spherical and upright or horizontal cylindrical tanks. Where two or
more tanks of the same type are laid out in a battery, only one tank need be described
to allow the SO250-UI to calculate the content based on the input number of tanks. The
following settings can be applied in the “Content measurement” menu:
•Tank form
•Tank volume / capacity / filling height
•Sensor distance from liquid when tank is full
•Number of tanks in battery
•Content display unit
•Measurement time interval
SO250
-
UI
T
a
n
k
S
e
nsor
Tank content:
4885 litres
Settings >
SO250
-
UI
T
a
n
k
S
e
nsor
Distance: 59.4cm
Settings >
Di
s
t
ance measurem
>™
Content measurem >
Interfaces >
Acoustic signal >
Di
sp
l
ay
i
n mm
>™
Display in cm >
Display in m >
M
easuremen
t
frequency?
Once every 8 secs.™

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
10
Main menu:
or
Press the key once to access the “Settings” area.
Move the cursor (the blinking rectangle on the right) to
the "Content measurement" menu item using the
and keys, and press the key.
Move the cursor to the desired setting using the or
keys. The SO250-UI can calculate the content of
rectangular, spherical, and upright or horizontal
cylindrical tanks.
Confirm your selection using the key and proceed as described for the respective tank
form.
Rectangular tank
Move the cursor to the desired setting using the or
keys. You can input the capacity of the tank in litres
(l) or cubic meters (m³). Confirm your selection using
the key.
or
Use the and keys to select the maximum capacity of the tank (the number of tanks
in use can be input at a later stage).
Settings options: Litres: 1 to 99 l in one-litre increments, 100 to 100,000 l in one
hundred-litre increments. Cubic meters: 1 to 99 m³ in one-litre increments, 100 to
100,000 m³ in one hundred-cubic metre increments.
Confirm your selection using the key.
Use the and keys to select the maximum filling
height of the tank (1 to 254 cm).
Confirm your selection using the key and proceed
as described in “Settings for all tank shapes”.
SO250
-
UI
T
a
n
k
S
e
nsor
Tank content:
4885 litres
Settings >
SO250
-
UI
T
a
n
k
S
e
nsor
Distance: 59.4cm
Settings >
M
ax
i
mum capac
it
y
of tank:
5000 m3>™
M
ax
i
mum capac
it
y
of tank:
5000 litres >™
Di
s
t
ance measurem
>
Content measurem >™
Interfaces >
Acoustic signal >
R
ec
t
angu
l
ar
t
an
k
>™
Spherical tank >
Cylinder upright >
Cylinder horizont.>
T
an
k
vo
l
ume
i
n
l
>™
Tank volume in m3>
Select a measurement
unit!
M
ax
i
mum
filli
ng
heightof tank:
230 cm ™

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 11
Spherical tank
Use the and keys to select the interior diameter
of the tank (1 to 1,000 cm).
Confirm your selection using the key and proceed as described in “Settings for all
tank shapes”.
Cylinder upright
Use the and keys to select the interior diameter
of the tank (1 to 1,000 cm). Confirm your selection
using the key.
Use the and keys to select the maximum filling
height of the tank (1 to 254 cm).
Confirm your selection using the key and proceed as described in “Settings for all
tank shapes”.
Cylinder horizontal
Use the and keys to select the length of the tank.
Settings options: 1 to 99 cm in one-centimetre increments, 100 to 100,000 cm in ten-
centimetre increments.
Confirm your selection using the key.
Use the and keys to select the interior diameter
of the tank (1 to 1,000 cm).
Confirm your selection using the key and proceed as described in "Settings for all
tank shapes".
I
n
t
er
i
or
di
ame
t
er o
f
tank:
200 cm ™
I
n
t
er
i
or
di
ame
t
er o
f
tank:
200 cm ™
M
ax
i
mum
filli
ng
heightof tank:
230 cm ™
T
an
k
l
eng
th
:
200 cm > ™
I
n
t
er
i
or
di
ame
t
er o
f
tank:
200 cm ™

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
12
Settings for all tank shapes
Use the and keys to select the distance of the
sensor from the liquid when the tank is full (12 to 200
cm). Confirm your selection using the key.
Use the and keys to select how many of the
described tanks are included in the battery (1 to 100
tanks). Confirm your selection using the key.
Move the cursor to the desired setting using the or
keys. The SO250-UI can indicate the fluid content
of the tank in litres (l) cubic meters (m³) or percent
(%). Confirm your selection using the key.
Use the and keys to set the desired time interval
for your measurements.
Settings options: From 1 s to 9 s in one-second increments, from 10 s to 50 s in ten-
second increments, from 1 min to 120 min in 10-minute increments.
Confirm your selection using the key. You will automatically return to the main menu.
Interfaces
Main menu:
or
Press the key once to access the “Settings” area.
Move the cursor (the blinking rectangle on the right)
to the “Interface” menu item using the and keys,
and press the key.
The selection menu for the different interfaces
appears.
SO250
-
UI
T
a
n
k
S
e
nsor
Tank content:
4885 litres
Settings >
SO250
-
UI
T
a
n
k
S
e
nsor
Distance: 59.4cm
Settings >
S
ensor
di
s
t
ance
f
rom
liquid when tank is
full:
15cm™
N
um
b
er o
f
t
an
k
s
i
n
battery:
2 Tanks ™
Di
sp
l
ay
i
n
lit
res
>™
Display in m3>
Display in % >
M
easuremen
t
frequency?
Once every 8 secs.™
Di
s
t
ance measurem
>
Content measurem >
Interfaces > ™
Acoustic signal >v
M
o
db
us se
tti
ngs
>
Current output >
Voltage output >
Relay settings >

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 13
Modbus settings
The following settings can be applied to the Modbus interface:
•Modbus switch on/off settings
•Modbus address settings
•Data transmission rate settings
•Parity check settings
Move the cursor to the "Modbus settings" menu item
using the or keys. Confirm your selection using
the key.
Move the cursor to the desired setting using the or
keys. Confirm your selection using the key.
Selecting “Switch off” returns the SO250-UI automatically to the basic settings.
Selecting “Switch on” brings you to the next Setting step:
Use the and keys to change the address (1 to
247). Confirm your selection using the key.
Use the and keys to set the desired data
transmission rate.
Settings options: 4.8 kbit/s • 9.6 kbit/s • 19.2 kbit/s • 38.4 kbit/s • 115 kbit/s.
Confirm your selection using the key.
Use the and keys to set the desired data parity
check (even/odd parity). Confirm your selection using
the key.
You will automatically return to the main menu.
Current output
Move the cursor to the "Current output" menu item
using the or keys. Confirm your selection using
the key
.
M
o
db
us se
tti
ngs
>™
Current output >
Voltage output >
Relay settings >
P
ar
it
y c
h
ec
k
:
Even Parity™
M
o
db
us se
tti
ngs
>
Current output >™
Voltage output >
Relay settings >
C
ommun
i
ca
ti
on v
i
a
Modbus
switch on >™
switch off >
Add
ress
i
n
Modbus system:
1™
D
a
t
a
t
ransm
i
ss
i
on
rate:
19.2 kbit/s™

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
14
Use the and keys to set the operating range of
the current output. Settings options: 0 mA … 20 mA
or 4 mA … 20 mA.
Confirm your selection using the key. You will automatically return to the main menu.
Operating range 0…20 mA:
Distance measurement: Content measurement:
0 mA 12 cm 0 mA 0% Tank content
20 mA 250 cm 20 mA 100% Tank content
If "No echo received“: 0 mA.
Operating range 4…20 mA:
Distance measurement: Content measurement:
4 mA 12 cm 4 mA 0% Tank content
20 mA 250 cm 20 mA 100% Tank content
If "No echo received“: 4 mA.
Voltage output
Move the cursor to the "Voltage output" menu item
using the or keys. Confirm your selection using
the key.
Use the and keys to set the operating range of
the current output. Settings options: 0 V … 5 V or
0 V … 10 V.
Confirm your selection using the key. You will automatically return to the main menu.
Operating range 0…5 V:
Distance measurement: Content measurement:
0 V 12 cm 0 V 0% Tank content
5 V 250 cm 5 V 100% Tank content
If "No echo received“: 0 V.
Operating range 0…10 V:
Distance measurement: Content measurement:
0 V 12 cm 0 V 0% Tank content
10 V 250 cm 10 V 100% Tank content
If "No echo received“: 0 V.
O
pera
ti
ng range o
f
current output:
0 mA .. 20 mA ™
M
o
db
us
s
e
tti
ngs
>
Current output >
Voltage output > ™
Relay settings >
O
pera
ti
ng range o
f
Voltage output:
0 V .. 10 V ™

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 15
Relay settings
Both relay outputs can either be set to automatically monitor tank contents
(filling/drainage, overfill/empty warnings), or the relays can be used to trigger a fault
warning.
Whenever any value is set in the “Rel. 1/2 settings” menu item, the relevant relay
operates as a control system for automatic monitoring. Whenever the “Rel. 1/2 fault
warning” menu item is selected, only a fault warning is triggered.
Move the cursor to the "Relay settings" menu item
using the or keys. Confirm your selection using
the key.
Setting relays 1 / 2:
To use the relay for automatic filling/drainage or for
overfill/empty warnings, move the cursor to the “Rel.
1 settings” and/or “Rel. 2 settings” menu items using
the or keys.
The settings options are the same for both relays. Confirm your selection using the
key.
Move the cursor to the desired setting using the or
keys. Confirm your selection using the key.
Tank fill level:
Use the and keys to set the minimum level (in
%), at which tank filling starts. Confirm your setting
using the key.
Use the and keys to set the maximum level (in
%), at which tank filling stops. Confirm your setting
using the key. You will automatically return to the
main menu.
Tank drainage:
Use the and keys to set the maximum level (in
%), at which tank drainage starts. Confirm your
setting using the key.
R
1
se
tti
ngs
>
™
R 2 settings >
R 1 fault warning >
R 2 fault warning>
M
o
db
us se
tti
ngs
>
™
Current output >
Voltage output >
Relay settings >
T
an
k
fill
l
eve
l
>
™
Tank drainage >
Overfill warning >
Empty warning >
St
ar
t
t
an
k
filli
ng
with R 1 when
a minimum level of
15%™ is reached.
St
op
t
an
k
filli
ng
with R 1 when
a maximum level of
90%™ is reached.
St
ar
t
t
an
k
d
ra
i
nage
with R 1 when
a maximum level of
90%™ is reached.

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction.
16
Use the and keys to set the minimum level (in
%), at which tank drainage stops. Confirm your
setting using the key. You will automatically return
to the main menu.
Overfill warning:
Use the and keys to set the maximum level (in %) at which an overfill warning is
triggered. Confirm your setting using the key. You will automatically return to the
main menu.
Empty warning:
Use the and keys to set the minimum level (in %)
at which an empty warning is triggered. Confirm your
setting using the key. You will automatically return
to the main menu.
Fault warnings using relays 1 / 2:
To use the relays for fault warnings, move the cursor
to the "Rel. 1 fault warning" and/or "Rel. 2 fault
warning" menu items using the or keys.
Confirm your selection using the key. You will automatically return to the main menu.
The selected relay will only close in the event of a fault, and no further settings are
possible. To switch off the fault warning, select any of the relay functions in the "Rel. 1/2
settings" menu item.
Acoustic signal
The SO250-UI Tank Sensor offers the possibility of triggering an acoustic warning
whenever a set value for a relay is over- or under-run.
Main menu:
or
Press the key once to access the "Settings" area.
SO250
-
UI
T
a
n
k
S
e
nsor
Tank content:
4885 litres
Settings >
SO250
-
UI
T
a
n
k
S
e
nsor
Distance: 59.4cm
Settings >
St
ar
t
t
an
k
d
ra
i
nage
with R 1 when
a maximum level of
15%™ is reached.
Warn "Tank is full"
using R 1 when
a maximum level of
90%™
i
s reac
h
e
d
.
Warn "Tank is empty"
using R 1 when
a minimum level of
15%™
i
s reac
h
e
d
.
R
1
se
tti
ngs
>
R 2 settings >
R 1 fault warning > ™
R 2 fault warning>

SO250-UI Tank Sensor | Version 18.08.2015 | Data subject to alteration. Errors subject to correction. 17
Move the cursor (the blinking rectangle on the right)
to the "Acoustic signal" menu item using the and
keys, and press the key.
Move the cursor to the desired setting using the or
keys. The SO250-UI can issue an acoustic signal
when relays 1 and/or 2 is/are triggered, or when
relays 1 or 2 is/are triggered.
Confirm your selection using the key. You will automatically return to the main menu.
Language
Main menu:
or
Press the key once to access the "Settings" area.
Move the cursor (the blinking rectangle on the right)
to the "Language" menu item using the and
keys, and press the key.
Move the cursor to the desired language using the
or keys (German, English, French, Italian or
Spanish).
Confirm your selection using the key. You will automatically return to the main menu.
SO250
-
UI
T
a
n
k
S
e
nsor
Tank content:
4885 litres
Settings >
SO250
-
UI
T
a
n
k
S
e
nsor
Distance: 59.4cm
Settings >
Di
s
t
ance measurem
>
Content measurem >
Interfaces >
Acoustic signal >v™
A
cous
ti
c s
i
g.
off
>
™
with relay 1 >
with relay 2 >
with relays 1 & 2 >
L
anguage
>
™
S
p
r
ac
h
e :
D
eu
t
sc
h
™
Language :English
Langue :Français
Lingua :Italiano v