M LLET
Füllstandtechnik
Rotary blade level indicator
DF30
Level limit switch for bulk goods
Operating instructions
Index
Safty instructions
Operating instructions
1. Description
2. Installation
3. Electrical connection
4. Switching logics and function displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Setting of the sensitivity
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03
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03
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04
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05
DF
Page
02
04
6. Utilization
7. Maintenance and servicing
8. Storage
9. Disposal
Dimensions
EU-Declaration of Conformity
C o n g r at u la ti o n , w e f el ic it at e t o y o u r g o o d c ho is e.
You have decided for a first class branded product, a rotary blade level
indicator from the company
It satisfies highest international standards:
Functionality, versatileness, long service life and design
Thank you for having decided for our product.
MOLLET.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
05
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05
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05
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05
06
07
M LLET
Füllstandtechnik
Competence in rotation
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846 Operating instruction
©
by MOLLET
12/19 DF30-BA
01
M LLET
Füllstandtechnik
Read and follow these safety instructions first and take notice of the operating instructions.
Safety instructions
1.1 The installation, initial operation and maintenance may be done by a qualified expert with electrical know-how only.
1.2 The connection of the single components as like as measuring blade, anti-buckling protection, shaft extension are
permissible only with the attached pins.
1.3 For the electrical connection take notice of the local and statutory rules and regulations and/or the VDE 0100.
1.4 Before electrical connection, compare the supply voltage with the details at the data plate.
1.5 A fuse (with max. 4 A) has to be connected in series to the voltage supply.
1.6 Protect the signal contacts from voltage peaks when inductive loads are connected.
Rotary blade level indicator
Level limit switch for bulk goods
DF30
1.7 The device may put into operation with built-in cap-sealing and when it is closed, only (touchdangerous voltage).
1.8 Switch off the power supply, before opening the device (touchdangerous voltage).
Cable entry
2.1 The level indicator will be delivered with a cable gland M20x1.5.
2.2 The second drill-hole is closed with a plug screw M20 1.5. Optional a further cable gland can be delivered.x
2.3 The cable gland and the plug screw were screwed on at the factory. Please check if the cable gland or the plug screw
have loosened during the mounting or the transportation. If so, tighten it again.
2.4 The cable gland will be delivered with a PE sealing disc. With it, the level indicator is protected against dust and dirt
entry during transportation and storage. When the indicator is brought into the dusty area it has to be installed
immediately at its designated place, the PE sealing disc has to be removed, a cable has to be pulled into the cable gland
and the pressure screw has to be screwed on to maintain the type of protection.
ATTENTION
Excessive screw on may injure the type of protection.
By use in explosive hazardous areas read and follow the
special conditions and instructions for safe application
off the attached
explosive protection information
first an take notice of the operating instructions.
©
02 DF30-BA 12/19
by MOLLET
Operating instruction MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
M LLET
Füllstandtechnik
Operating instructions
Rotary blade level indicator
Level limit switch for bulk goods
DF30
1. Description
1.1 Intended use
The electromechanical level limit switch is monitoring
the filling level of bulk goods in silos, bunkers,
containers, hoppers, weighers, etc..
1.2 Construction
control head
(housing with motor and switch)
cable gland
process connection
measuring
blade
001-0136
1.3 Function
The rotating measuring blade, projecting into the silo
or container, is driven by a gearmotor.
If the bulk material is reaching the measuring blade,
the rotation will be hindered and it will be stopped.
The return torque turns the pivoted motor from its end
position and actuates the signal switch. A second
switch turns the motor off.
If the filling level of the bulk material sinks, the blade
becomes freely again and a spring will turn back the
motor into its original end position.
Thereby the motor will be turned on again and the
signal switch will be switched back.
2. Installation
2.1 Preparation
- Read and follow the safety instructions and the
operating instructions before mounting the device!
- Inspect if the delivery is complete.
The delivery volume is different, depending on the
options.
2.2 Mounting
Thread connection
Put the level indicator together with the sealring at
the provided position in the silo or container wall
and screw it tightly by means of appropriate tool s.
2.3 Mounting of the measuring blades
1.4 Technical data
Manufacturer MOLLET
Füllstandtechnik GmbH
Industriepark RIO 103Address
74706 Osterburken
rotary blade level
Name
indicator
Type DF
see data plateBulk goods temperature
Ambient temperature -20 °C ... +70 °C
see data platePressure range
1 U/min Measuring blade speed
Response delay approx. 1.20 sec.
Maintenance none
1.5 Materials
Housing aluminium
or stainless steel 1.4401
aluminium
Process connection
or stainless steel 1.4301
stainless steel 1.4301 Blade shaft
stainless steel 1.4301 Measuring blade
NBR, blackSealing ring R0
R1
R2
R5
(order code)
Viton/Teflon/VA
NBR, white, FDA conform
Teflon
Attention!
During beating
the pin into the
shaft, you have to
support the shaft
with an adequate
counterpart.
001-0746
2.4 Orientation of the housing
After mounting, the housing has to be orientated by
turning in such a away, that the cable gland is directed
towards the cable duct.
Cable gland in direction
to the cable duct
Attention!
Ensure that the cable is
fixed tightly in the cable
gland.
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846 Operating instruction
©
by MOLLET
12/19 DF30-BA
03
M LLET
Füllstandtechnik
Rotary blade level indicator
Level limit switch for bulk goods
DF30
3. Electrical connection
3.1 Electrical data
Supply voltage see data plate
Power consumption AC 4 VA
4 WDC
Cable entry cable gland M20 x 1.5
Type of protection IP 66
Connection clamps max. 1.5 mm²
Signal contact change-over contact
potentialfree
4 V DC ... 250 V ACSwitching voltage
1mA ... 2ACapacity of the contact
The signal contact is a multivoltage and multicurrent
switch. It is suitable for use in circuits with low currents
and low voltages as well as for medium currents with
control voltages up to 250 V ~AC.
Caution!
During the whole working life, the switch may be used
in the same kind of circuit types, only.
When the switch has been used once with medium
switching capacity, it cannot be used any more for the
low switching capacity.
acc. to DIN 60529
3.3 Circuit diagram
3.4 Circuit diagram
AC
346
DC
346
AC
11
11
1~
2
NL PE
001-0AP00
1~
DC
2
3.2 Electrical connection
- Install the wiring and electrical connection in
compliance with the circuit diagrams.
- Run the cable between housing and cable
protection, in order that the switches and the motor
will not be hampered at their necessary movement.
- After the electrical connection the cap nut of the
cable gland has to be screwed and please ensure
that the cable is fixed strongly and tightly in the
cable screwing .
4. Switching logics and function displays
Symbol signification
= under voltage = LED "OFF"
= full = LED "ON"
= empty
Arrangement and colours of
the LEDs for function display
Wiring of the level indicator
in a way that no undesirable
switching function can occur
in case of mains voltage failure.
Switching logics
346
001-0AP20
Attention!
PE
001-0AP02
346
001-0AP22
yellow green
green
04 DF30-BA 12/19
©
by MOLLET
001-0747
Operating instruction MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
M LLET
Füllstandtechnik
Rotary blade level indicator
Level limit switch for bulk goods
DF30
5. Setting of the sensitivity
As occasion demands, the sensitivity of the level
indicator can be adjusted, referring to the characteristics
of the bulk goods, by shifting the spring arm.
-
Spring arm
light
Works setting
strong
Three settings are possible:
1. light for very light bulk goods
2. medium suitable for almost all bulk goods
3. strong for sticking bulk goods
medium
-
+
+
001-0229
6.3 Inexpert handling
- Ignoring of the safety instructions and the operating
instructions.
- U the rotary blade level indicator in not
intended use.
- Mounting of spare parts which are no original parts.
- Remove, adding or change of assembling parts,
unless this has been described in the documents of
the manufacturer.
- Violation against applicable law and standards.
tilization of
7. Maintenance and servicing
7.1 Maintenance
- In case of intended use, the rotary blade level
indicator needs no maintenance.
- Remove deposits and stickings from the blades or
wrinkles with a brush or with a scraper.
Don´t use any force and don´t damage the sealring
of the shaft.
- Inspect the assemblings inside of the container
about signs of wear and tear, in regular intervals.
Define the intervals of the control, depending on the
bulk goods characteristics.
7.2 Servicing
- Damaged parts, contacts or connections have to be
repaired immediately or being replaced with parts of
the same kind.
- Until the complete restoration of the proper function,
the rotary blade level indicator must not be used
any more.
Fluidised bulk goods are lighter during filling and
draining process. This has to be taken appropriately
into consideration when setting the spring force and
selecting the size of the measuring blade.
6. Utilization
6.1 Putting into operation
- Commissioning of the rotary blade level indicator
only, if the installation will be done correctly and if it
will be fixed tightly with the electrical contact.
- During operation, the housing and the cable entry
must be closed tightly.
6.2 Normal operation
- Use the rotary blade level indicator in its intended
only. application
- Operate the level indicator within the intended
temperature ranges for the ambient and bulk goods
temperature.
- Protect the inside of the control head from soiling.
- When the indicator has to be damaged, you have to
take the device out of operation immediately.
8. Storage
- While storage, the level indicator has to be
protected from dust and humidity.
- Please ensure that the shaft of level indicators with
jib extension will not be buckled or bended.
9. Disposal
- The level indicator can be recycled.
- The disposal applies to the valid environmental
guidelines according to the location of the carrier
and the local manufacturing conditions.
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846 Operating instruction
©
by MOLLET
12/19 DF30-BA
05
M LLET
Füllstandtechnik
Dimensions
process connection G1½
measuring blade T6V
Rotary blade level indicator
Level limit switch for bulk goods
DF30
92x88
M20x1.5
with measuring blade adapter
process connection G1"
001-0137
M7
2,2
Ø14
250
without housing
process connection G1½"
without measuring blade
001-0136
(on mounting plate)
86x76
31
3
Ø9
001-0135
Application instructions
Mounting position vertical
Loadability of the blades F1 max.
©
06 DF30-BA 12/19
by MOLLET
Operating instruction MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
50 Nm
F
1
001-0136
M LLET
Füllstandtechnik
EU-Konformitätserklärung
EU-Declaration of Conformity
E KE-DFU
Index
Seite/Page von/of
3
1 1
Wir/We
Industriepark RIO 103
D-74706 Osterburken
Tel. 06291 64400 Fax 06291 9846
erklären in alleiniger Verantwortung, dass das Produkt:
declares under our sole responsibility, that the product:
MOLLET Füllstandtechnik GmbH
Drehflügel-Füllstand-Grenzschalter / Rotary blade limit switch
Drehflügel-Füllstandanzeiger / Rotary blade level indicator
Typ/Type
den folgenden Europäischen Richtlinien entspricht:
conforms with the following European directives:
DF ...
EMV-Richtlinie EMC directive 2014/30/EU
Niederspannungsrichtlinie Low voltage directive 2014/35/EU
Angewandte harmonisierte Normen oder normative Dokumente:
Applied harmonized standards or normative documents
DIN EN 61326-1:2013 DIN EN 55032:2016 DIN EN 55024:2016
DIN EN IEC 61000-6-2:2019
DIN EN 61010-1:2011 DIN EN 60529:2014
Und die Geräte mit - Kennzeichnung entsprechen zusätzlich der folgenden Europäischen Richtlinie:
And the devices with - marking conform additional with the following European directive:
ATEX-Richtlinie ATEX directive 2014/34/EU
Je nach Ausführungsvariante angewandte harmonisierte Normen oder normative Dokumente:
Depending on the design applied harmonized standards or normative documents:
DIN EN 1127-1:2019 DIN EN ISO 80079-36:2016 DIN EN ISO 80079-37:2016
DIN EN IEC 60079-0:2019 DIN E DIN EN 60079-1:2015 N 60079-7:2016
DIN EN 60079-31:2014
EG-Baumusterprüfbescheinigungsnummer:
EU-Type Examination Certificate:
IBExU04ATEX1010X
IBExU04ATEX1033X
IBExU04ATEX1034
Ausgestellt von:.
Issued by: IBExU Institut für Sicherheitstechnik GmbH, 09599 Freiberg (0637)
Qualitätssicherung:
Quality assurance: TÜV NORD CERT GmbH, 30159 Hannover (0044)
Osterburken, den 11.01.2020
IBExU04ATEX1001X
Wolfgang Hageleit
Geschäftsführer / managing director
Diese Erklärung darf nur unverändert weiterverbreitet werden.
This declaration is only allowed to hand out in unchanged form.
91_EUKE-DF_3_01-20
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