Vega VEGASON 51K User manual

Level and Pressure
Operating Instructions
VEGASON 51K … 53K

2VEGASON 51K … 53K
Contents
Contents
Safety information ........................................................................ 2
1 Product description
1.1 Function ................................................................................. 4
1.2 Application features ............................................................. 5
1.3 Adjustment ............................................................................ 5
2 Types and versions
2.1 Type survey .......................................................................... 8
2.2 Configuration of meas. systems ....................................... 10
3 Technical data
3.1 Data ..................................................................................... 17
3.2 Approvals ........................................................................... 21
3.3 Dimensions ........................................................................... 22
Safety information
The described module must only be installed
and operated as described in these operating
instructions. Please note that other action can
cause damage for which VEGA does not take
responsibility.
Ex-area
Please note the approval documents attached
(yellow binder) and especially the included
safety data sheet.

VEGASON 51K … 53K 3
Contents
4 Mounting and installation
4.1 General installation instructions ........................................ 24
4.2 Measurement of liquids ..................................................... 25
4.3 Measurement of solids ...................................................... 27
4.4 Socket extensions ............................................................. 29
4.5 Flow measurement ............................................................. 30
4.6 False echoes ...................................................................... 31
4.7 Installation error .................................................................. 33
5 Electrical connection
5.1 Connection and connection cable .................................... 36
5.2 Connection of the sensor .................................................. 37
5.3 Connection of the external indicating instrument
VEGADIS 50 ....................................................................... 38
6 Set-up
6.1 Adjustment structure ......................................................... 39
6.2 Adjustment with PC ............................................................ 39
6.3 Adjustment with the adjustment module MINICOM ........ 52
6.4 Adjustment with the HART®-handheld .............................. 58

4VEGASON 51K … 53K
Product description
1 Product description
1.1 Function
The continuous level measurement with ultra-
sonic sensors is based on the running time
measurement of ultrasonic pulses.
Measuring principle
Piezoceramic high performance transducers
emit focused ultrasonic pulses which are
reflected by the surface of solids and liquids.
The measuring electronics prepare a precise
picture of the environment from the running
time and the signal form of the reflected ultra-
sonic pulses. The transducers work as trans-
mitter and receiver. As receiver the trans-
ducers are high sensitivity piezo-micro-
phones.
In order to be prepared for the different
measuring distances and requirements, the
instruments operate with emitting frequencies
of 34 kHz up to 70 kHz.
As the sound velocity is subjected to a tem-
perature influence, the transducer also con-
tinuously detects the ambient temperature so
that the level is precisely provided even in
case of varying ambient temperature.
Output signals
The level proportional measuring signal is
provided as 4 … 20 mA-output signal.
The parameter adjustment of the analogue
4 … 20 mA-signal is individually possible and
reflects the measuring range or the adjusted
adjustment range of the sensor.
Measured value indication
If desired, an indicating instrument for direct
lobal survey can be mounted on to the series
50 ultrasonic sensors. The indicating instru-
ment shows the precise level with the ana-
logue bar-graph and with the digital figure. In
addition to the indication in the sensor itself,
you can have the level displayed with the
external indicating instrument VEGADIS 50
up to 25 m away from the sensor.
The external measured value indication oper-
ates, like the integral indication, independent
of the 4 … 20 mA-output signal, and indi-
vidual parameter adjustment is possible.
emission - reflection - receipt
Meas.
distance
The measuring electronics precisely calculate
the distance between transducer and me-
dium from the speed of sound and the actu-
ally detected running time of the emitted
sound impulse. The distance is then con-
verted into a level proportional signal and
provided according to the sensor parameter
adjustment as precise scaled level.

VEGASON 51K …53K 5
Product description
1.2 Application features
Applications
•Level measurement of all liquids
•Level measurement of solids
(only short measuring distances) such as
e.g.:
coal, ore, stones, stone dust, cement,
gravel, crushed stones, sand, sugar, salt,
cereals, flour, granules, powder, dusts,
saw dust, wood chips
•Flow measurement on different flumes
•Gauge measurement, distance measure-
ment, object monitoring and conveyor belt
monitoring
Two-wire technology
•Supply and output signal on one two-wire
line (Loop powered)
•4 …20 mA-output signal
Rugged and precise
•Unaffected by product features such as
density, conductivity, dielectric constant …
•Suitable for aggressive substances
•Measuring ranges 0,25 m …15 m
Adjustment choice
•With adjustment software VEGA Visual
Operating (VVO) on PC
•With detachable adjustment module
MINICOM
•With the HART®-Handheld
•Measured value indication integrated in the
sensor
•Optional indication separate from the sen-
sor
Connection for each process
•G 11/2 A, 11/2" NPT
•G 2 A, 2" NPT
•Compression flange DN 100, ANSI 4"
Approvals
•CENELEC, ATEX, PTB, FM, CSA, ABS,
LRS, GL, LR, FCC
1.3 Adjustment
Each measuring distance is different, there-
fore each ultrasonic sensor must be given
some basic information on the application
and the environment, e.g. you need to inform
the sensor which level means “empty“and
which level “full“. Apart from this “empty and
full adjustment“, a number of other adjust-
ments can also be carried out with
VEGASON ultrasonic sensors.
The adjustment and parameter adjustment of
the ultrasonic sensors are carried out with
- the PC
- the detachable adjustment module MINI-
COM
- the HART®--Handheld
Adjustment with PC
The set-up and adjustment of the ultrasonic
sensors is generally made on the PC with the
adjustment program VEGA Visual Operating
(VVO) under Windows®.
The program leads quickly through the ad-
justment and parameter adjustment via pic-
tures, graphics and process visualisations.
Adjustment with the PC on the analogue 4 …20 mA-
signal and supply line or directly on the sensor (four-
wire sensor)
2
2
4 ...20 mA

6VEGASON 51K …53K
Detachable adjustment module MINICOM
-+ESC
OK
Tank 1
m (d)
12.345
2
2
Adjustment with the PC on the 4 …20 mA signal and
supply line to the DCS or directly on the sensor (in
the figure a two-wire sensor)
Visualised input of a vessel linearisation curve
The adjustment program recognises the sensor type
Product description
The PC can be connected to any individual
position of the system or the signal line. It is
thereby connected with the two-wire PC-
interface converter VEGACONNECT 2 to the
sensor or to the signal line.
The adjustment and parameter adjustment
data can be saved with the adjustment soft-
ware on the PC and protected with pass-
words. If required, the adjustment can be
transmitted quickly to other sensors.
Adjustment with adjustment module
MINICOM
With the (3,2 cm x 6,7 cm) 6-key adjustment
module with display you can carry out the
adjustment in clear text.
The adjustment module can be plugged into
the ultrasonic sensor or into the optional
external indicating instrument.
DCS
By removing the adjustment module unau-
thorised adjustments are avoided.

VEGASON 51K …53K 7
-+ESC
OK
2
4
Tank 1
m (d)
12.345
-+ESC
OK
Tank 1
m (d)
12.345
4 ... 20 mA
Product description
HART®-handheld
HART Communicator
2
24 ... 20 mA
HART®-handheld on the 4 …20 mA-signal line
Adjustment with the detachable adjustment module.
The adjustment module can be plugged into the
ultrasonic sensor or the external indication instrument
VEGADIS 50.
Adjustment with HART®-Handheld
Series 50 sensors with 4 …20 mA output
signal can also be adjusted with the HART®-
Handheld. A special DDD (Data-Device-
Description) is not necessary as the sensors
can be adjusted with the HART®-standard
menus of the handheld.
For adjustment, just connect the HART®-
Handheld in any position of the 4 …20 mA-
output signal line or insert the two communi-
cation lines of the HART®-handheld into the
adjustment sockets on the sensor.

8VEGASON 51K …53K
2 Types and versions
VEGASON series 50 sensors are a newly
developed generation of very compact, small
ultrasonic sensors. With very narrow space
requirements, they are designed for short
meas. distances (0 …15 m) and for stand-
ard applications such as storage tanks,
gauge measurement and buffer tanks.
Due to the small housing dimensions and
process connections, the compact sensors
monitor your levels very price favourably.
With the integral indication and the many
features of the “big brothers“of VEGASON
series 80, they offer the advantages of an
ultrasonic level measurement for applications
where the special advantages of a non-con-
tact measurement are not applicable for price
reasons.
VEGASON 50 ultrasonic sensors control the
two-wire technology perfectly. The supply
voltage and the output signal are transmitted
via a two-wire line. An analogue 4 ... 20 mA-
output signal is available as output or meas-
uring signal.
Types and versions
VEGASON 51
with 11/2“thread
VEGASON 52
with 2“thread
VEGASON 53
for mounting with holding strap or DN
100 compression flange (here on a
standpipe)
2.1 Type survey
General features
•Application in solids and liquids
•Measuring range 0,25 …15 m
•Ex-approved in Zone 1 (IEC) or Zone 1 (ATEX) classification
EEx ia [ia] IIC T6
•Integral measured value indication

VEGASON 51K …53K 9
Survey VEGASON …
51K 52K 53K
Signal output
–active (4 …20 mA) •• •
–passive (4 …20 mA) •• –
Voltage supply
–two-wire technology (voltage supply and
signal output via a two-wire line) •• –
–four-wire technology (voltage supply separated
from the signal line) •• •
Process connection
–G11/2A; 11/2“NPT •– –
–G 2 A; 2“NPT –• –
–DN 100 compression flange –– •
Adjustment
–PC •• •
–adjustment module in the sensor •• •
–adjustment module in external indicating instrument •• •
–HART®-handheld •• •
Measuring range in m
–liquids 0,25 …4 0,4 …7 0,6 …15
–solids 0,3 …2 0,25…3,5 0,75 …7
Types and versions
Type code
The second letter of the type designation e.g.
VEGASON 5[1]…differentiates the instru-
ments acc. to process connection and meas-
uring range.
The letter e.g. VEGASON 51[K] characterises
the output signal:
K stands for an analogue 4 …20 mA output
signal (compact instrument).
VEGASON 51 K E X . X X (example)
P - 90 …250 V AC (only in USA)
N - 20 …36 V DC, 24 V AC (only in USA)
Z - supply via signal conditioning instrument (only in USA)
U - only in USA
X - outside the USA
Ex approved
K - Analogue 4 …20 mA output signal
(two-wire or four-wire technology)
V - Digital output signal (two-wire technology)
Type 51: Measuring range 0,25 …4 m
Type 52: Measuring range 0,4 …7 m
Type 53: Measuring range 0,6 …15 m
Measuring principle (SON for ultrasonic)

10 VEGASON 51K …53K
24 … 20 mA -
+
1)
4
2.2 Configuration of meas. systems
A meas. system consists of a sensor with a
4 …20 mA signal output and a unit evaluat-
ing or processing the level proportional cur-
rent signal.
On the following pages you will see the in-
strument configurations called meas. system
which are shown in the following partly with a
signal processing.
Meas. systems in two-wire technology:
•4 …20 mA drawing without processing
unit, (bottom)
•4 …20 mA on active DCS, (page 12)
•4 …20 mA on active DCS (Ex-area),
(page 13)
•4 …20 mA on passive DCS, (page 14)
•4 …20 mA on indicating instrument
VEGADIS 371 Ex, (page 15)
Meas. systems in four-wire technology:
•4 …20 mA drawing without signal condi-
tioning instrument, (page 16)
VEGADIS 50
VEGA-
CONNECT 2
HART®-hand-
held
Types and versions
Meas. systems with VEGASON 51K … 53K
•Two-wire technology (loop powered), supply and output signal via a two-wire line
•Output signal 4 …20 mA (passive)
•Optional external indicating instrument with analogue and digital indication (can be mounted
up to 25 m away from the sensor)
•Adjustment with PC, HART®-handheld or adjustment module MINICOM (can be plugged into
the sensor or in the external indicating instrument VEGADIS 50)
1) If the resistors of the processing
systems connected to the
4 …20 mA-signal output are less
than 200 W, a resistor of 250 W to
350 Wmust be connected to the
connection line during adjustment.
The digital adjustment signal would
be extremely damped or short-
circuited via too small input
resistors of the connected
processing system which means
that the digital communication with
the PC could no longer be
ensured.

VEGASON 51K …53K 11
4 …20 mA 2
2
2
2
4
Measuring system with VEGASON 51K … 53K on active DCS
•Two-wire technology, supply on active DCS.
•Output signal 4 …20 mA (passive).
•Measured value indication integrated in the sensor.
•Optional external indicating instrument (can be mounted up to 25 m away from the sensor
in Ex-area).
•Adjustment with PC, HART®-handheld or adjustment module (can be plugged in the sensor
or in the external indicating instrument).
HART®-handheld
VEGA-
CONNECT 2
Types and versions
1) If the resistors of the processing systems
connected to the 4 …20 mA-signal output are less
than 200 W, a resistor of 250 W to 350 Wmust be
connected to the connection line during adjust-
ment.
The digital adjustment signal would be extremely
damped or short-circuited via too small input
resistors of the connected processing system
which means that the digital communication with
the PC could no longer be ensured.
2) 4 …20 mA passive means that the sensor takes,
depending on the level a current of 4 …20 mA.
The sensor therefore reacts electrically like a
resistor (consumer) on the DCS.
1)
VEGADIS 50
passive 2)
DCS

12 VEGASON 51K …53K
24 …20 mA 2
2
2
4
Types and versions
Measuring system with VEGASON 51K … 53K via separator in Ex-area on
active DCS
•Two-wire technology (loop powered), supply via the signal line on the DCS; output signal
4 …20 mA (passive)
•Separator converts the not-intrinsically safe DCS-circuit into an intrinsically safe circuit, the
sensor can therefore also be used in Ex-zone 1
•Optional external indicating instrument with analogue and digital indication (can be mounted
up to 25 m away from the sensor)
•Adjustment with PC, HART®-handheld or adjustment module MINICOM (can be plugged in
the sensor or in the external indicating instrument VEGADIS 50)
HART®-handheld
Ex-area Not Ex-area
Separator (e.g. Stahl)
(see "3.2 Approvals“)
VEGA-
CONNECT 2
VEGADIS 50
passive 2)
1)
DCS active
1) If the resistors of the processing systems
connected to the 4 …20 mA-signal output are less
than 200 W, a resistor of 250 W to 350 Wmust be
connected to the connection line during adjust-
ment.
The digital adjustment signal would be extremely
damped or short-circuited via too small input
resistors of the connected processing system
which means that the digital communication with
the PC could no longer be ensured.
2) 4 …20 mA passive means that the sensor takes a
current of 4 …20 mA depending on the level. The
sensor, therefore, reacts electrically like a resistor
(consumer) on the DCS. The DCS operates
actively, i.e. as current or voltage supply.

VEGASON 51K …53K 13
-
+
4 …20 mA
2
2
2
4
Measuring system with VEGASON 51K … 53K vi a separator (Smart-Trans-
mitter) on passive DCS
•Two-wire technology (loop powered), intrinsically ia-supply via the signal line from the sepa-
rator for operation of the sensor in Ex-Zone 1
•Output signal sensor 4 …20 mA passive
Output signal separator 4 …20 mA active
•Optional external indicating instrument with analogue and digital indication (can be mounted
up to 25 m away from the sensor)
•Adjustment with PC, HART®-handheld or adjustment module MINICOM (can be plugged in
the sensor or in the external indicating instrument VEGADIS 50)
Types and versions
(active) 2)
VEGA-
CONNECT 2
Separator (e.g. VEGATRENN 149 Ex see
"3.2 Approvals“)
VEGADIS 50
1)
DCS (passive) 3)
Ex-area Not Ex-area
1) If the resistors of the processing systems
connected to the 4 …20 mA-signal output are less
than 200 W, a resistor of 250 W to 350 Wmust be
connected to the connection line during adjust-
ment.
The digital adjustment signal would be extremely
damped or short-circuited via too small input
resistors of the connected processing system
which means that the digital communication with
the PC could no longer be ensured.
2) 4 …20 mA active means that the separator
delivers level dependent a current of 4 …20 mA.
The separator therefore reacts electrically against
the DCS like a current source.
3) 4 …20 mA passive means that the sensor takes,
a current of 4 …20 mA, depending on the level.
The sensor therefore reacts electrically like a
resistor (consumer) on the DCS.
HART®-handheld

14 VEGASON 51K …53K
-
+
4 ... 20 mA
VEGADIS
371 Ex
2
2
2
4
Measuring system with VEGASON 51K … 53K on the indicating instrument
VEGADIS 371 Ex with current and relay output
•Two-wire technology (loop powered), intrinsically safe ia-supply via the signal line from the
indicating instrument VEGADIS 371 Ex for operation of the sensor in Ex-zone 1
•Optional external indicating instrument with analogue and digital indication (can be mounted
up to 25 m away from the sensor)
•Adjustment with PC, HART®-handheld or adjustment module MINICOM (can be plugged in
the sensor or in the external indicating instrument VEGADIS 50)
Types and versions
(passive)
VEGADIS 50
0/4 …20 mA
Relay
(see "3.2 Approvals“)
1)
Ex-area Not Ex-area
HART®-handheld
VEGA-
CONNECT 2
1) If the resistors of the processing systems
connected to the 4 …20 mA-signal output are less
than 200 W, a resistor of 250 W to 350 Wmust be
connected to the connection line during adjust-
ment.
The digital adjustment signal would be extremely
damped or short-circuited via too small input
resistors of the connected processing system
which means that the digital communication with
the PC could no longer be ensured.

VEGASON 51K …53K 15
2-
+
4 …20 mA
2
2
2
4
Measuring system with VEGASON 51K … 53K in four-wire technology
•Four-wire technology, supply and output signal via two separate two-wire lines
•Output signal 4 …20 mA active
•Optional external indicating instrument with analogue and digital indication (can be mounted
up to 25 m away from the sensor)
•Adjustment with PC, HART®-handheld or adjustment module MINICOM (can be plugged in
the sensor or in the external indicating instrument VEGADIS 50)
•Max. resistance on the signal output (load) 500 W
Types and versions
(active) 2)
VEGADIS 50
1)
1) If the resistors of the processing systems
connected to the 4 …20 mA-signal output are less
than 200 W, a resistor of 250 W to 350 Wmust be
connected to the connection line during adjust-
ment.
The digital adjustment signal would be extremely
damped or short-circuited via too small input
resistors of the connected processing system
which means that the digital communication with
the PC could no longer be ensured.
2) 4 …20 mA active means that the sensor delivers
a current of 4 …20 mA (source) depending on the
level. The sensor, therefore, reacts electrically
against a processing system (e.g. indication) like a
current source.
HART®-handheld
VEGA-
CONNECT 2
³200 W

16 VEGASON 51K …53K
Types and versions
Several sensors on a voltage source
All sensors are dispatched with the same
communication address zero. If several sen-
sors are operated on one voltage source, a
communication on the signal line with the PC
or with the HART®-handheld is no longer
possible, as in this case all sensors are ad-
dressed digitally at the same time.
To avoid this, 250 W…350 W resistors must
be connected directly on the voltage source
in the sensor supply line. The inner resist-
ance of the voltage source must be very
small. The digital communication signal (PC
or HART®-handheld) used on the sensor line,
is then no longer transmitted to the other
sensors. You can then communicate with the
PC or HART®-handheld on the signal line of
the appropriate sensor without the participa-
tion of all other sensors in the communication
even though all sensors react to the address
zero. The low inner resistor (alternating load
resistor by filter capacitor) of the voltage
source short-circuits the signals before they
can cross over to the other sensor lines. The
C
R = 0…2 Ω
250 Ω
250 Ω
250 Ω
250 Ω
250 Ω
250 Ω
resistors avoid the adjustment signals of the
actually operated sensor from also being
short-circuited.
With the PC and the adjustment software
VEGA Visual Operating (VVO) or with the
HART®-handheld, the sensors can be ad-
justed from the address zero to the address
1 …15. If a sensor is adjusted to the ad-
dress 1 …15, the sensor no longer delivers
a 4 …20 mA-signal, but is frozen to 4 mA
(power supply). Nevertheless, the sensor will
continue to provide the measured value digit-
ally. This mode is called multidrop operation.

VEGASON 51K …53K 17
0422
mA
14
36
V
29
16
Technical data
3 Technical data
3.1 Data
Power supply
Supply voltage
- two-wire sensor 24 V DC (16 …36 V DC)
- four-wire sensor 230 V AC (20 …250 V AC), 50/60 Hz
24 V DC (20 …72 V DC)
fuse 0,2 A TR
1000
900
800
700
680
600
500
400
300
250
200
100
0
16 20 25 30 35
17 18 19 29 36
V
max. voltage limit
with not-Ex-sensors
max. voltage
limit with
Ex-sensors
HART®-
load
Diagram of the min. supply voltage dependent on the
sensor current (two-wire sensor)
Current consumption
- two-wire sensor max. 22,5 mA
- four-wire sensor max. 140 mA
Power consumption
- two-wire sensor max. 80 mW, 0,45 VA
- four-wire sensor max. 1,2 W, 2,50 VA
Load
- two-wire sensor see diagram
- four-wire sensor max. 500 W
Load diagram of the two-wire sensor
(loop resistor of processing unit, e.g. DCS and supply line)
Range of the required and permis-
sible terminal voltage
Ex-voltage limit
min. voltage limit
by using the
HART®-load

18 VEGASON 51K …53K
Technical data
Type 51…52…53…
Measuring range (relating to the transducer surface)
Liquid 0,25 …4 m 0,4 …7 m 0,6 …15
m
Solid 0,30 …2 m 0,5 …3,5 m 0,75 …7
m
Output signal
Analogue 4 …20 mA-current signal
Adjustment
- PC with adjustment software VEGA Visual Operating
- adjustment module MINICOM
- HART®-handheld
Accuracy (typical values under reference conditions) 1)
Class accuracy (deviation in characteristics
including repeatability and hysteresis
acc. to the limit point method) < 0,1 % relating to max. measuring range
Temperature drift (relating to 20°C) < 0,015 %/10 K of measuring range
Accuracy of the 4 …20 mA-
output signal 0,025 % (D/A-converter)
Resolution 1 mm
Characteristics
Min. span
(between empty and full adjustment) > 20 mm (recommended > 50 mm)
Ultrasonic frequency 70 kHz 55 kHz 34 kHz
Intervals 1,0 s 1,0 s 1,0 s
Beam angle
(at -3 dB emitted power) 5,5°5,5°3°
Response time 2) 2 …20 s
(dependent on the factory setting)
Materials
Housing PBT (Valox)
Transducer, process connection thread PVDF
Compression flange PP or 1.4571
Transducer diaphragm (type 53) 1.4571
Weights
Weight incl. transducer
- VEGASON 51 1,2 kg
- VEGASON 52 1,6 kg
- VEGASON 53 2,3 kg
1) Reference conditions acc. to IEC 770, e.g.: Temperature 18°C …30°C etc.
2) The response time is the time the sensor requires to provide the level correctly with a quick level change
(with max. 10 % deviation).

VEGASON 51K …53K 19
Technical data
Ambient conditions
Max. vessel pressure (gauge pressure)
- VEGASON 51 and 52 3 bar
- VEGASON 53 1 bar
Ambient temperature
- sensor (electronics) -20°C …+60°C
- process (transducer) -40°C …+80°C (StEx: -20°C …+75°C)
- storage and transport temperature -40°C …+80°C
Protection
- sensor IP 67
- transducer, process IP 68
Protection class
- two-wire sensor II
- four-wire sensor I
Overvoltage category III
Self-heating
at 40°C ambient temperature
- to sensor 45°C
- to transducer, process 55°C
Ex-technical data
Classification ia intrinsically safe (in conjunction with a safety
barrier or separator)
Temperature class (permissible ambient
temperature on the transducer when used
in Ex-areas)
-T6 42°C
-T5 58°C
-T4 60°C
-T3 60°C
Ex-approved in category or zone
- ATEX Zone 1 (II 2 G)
- IEC, CENELEC, PTB Zone 1 (II 2 G)
Classification mark EEx ia IIC T6
Process connections
VEGASON 51 G 11/2A, 11/2" NPT
VEGASON 52 G 2 A, 2" NPT
VEGASON 53 DN 100 compression flange
Connection lines
Two-wire sensors supply and voltage via one two-wire line,
load dependent on the supply voltage
Four-wire sensor supply and signal separately, load of the
4 …20 mA-signal line max. 500 W
Cross-section area of conductor generally 2,5 mm2
Earth connection max. 4 mm2
Cable entry, Pg 2 x M20 x 1,5 (cable diameter 5 …9 mm)

20 VEGASON 51K …53K
CE-conformity
VEGASON series 50 ultrasonic sensors meet the protective regulations of EMVG
(89/336/EWG) and NSR (73/23/EWG). The conformity has been judged acc. to the following
standards:
EMVG Emission EN 50 081 - 2: 1993
Susceptibility EN 50 082 - 2: 1995
NSR EN 61 010 - 1: 1993
Outputs and processings
Display indication
Indication - optional integrated in the sensor, scalable
analogue and digital meas. value indication
- optional external meas. value indication,
powered by the sensor and up to 25 m away
from the sensor (also the adjustment module
MINICOM can be inserted)
Signal output
Signal output
- two-wire technology 4 …20 mA (load dependent on supply
voltage, see load diagram page 17)
- four-wire technology 4 …20 mA (load max. 500 W)
Resolution of the 20 mA-signal 0,025 % of operating range
Failure of the 20 mA-signal < 0,025 % of operating range
Two-wire technology:
The analogue 4 …20 mA-output signal (measuring signal) is transmitted together with the
power supply via a two-wire line.
Four-wire technology:
Separate power supply.
The analogue 4 …20 mA-output signal (measuring signal) is looped by a line separated
from the supply voltage.
Technical data