Mollet MOLOS MFD User manual

M LLET
Füllstandtechnik
GmbH
1.4 Dimensions
Operating instructions
1. Description
1.1 Intended use
The level indicator observes the filling level as a limit switch in silos
and vessels. It can be used as full, demand and empty indicator for
dusty and powdery, granulated and grainy bulk goods with a max.
grain size up to 30 mm and with a bulk density of 0.3 t/m³ ... 2.5 t/m³.
1.2 Function
The bulk goods presses with its weight against the double
membrane. A tappet directly transfers the pressure from the
membranes to the switch. When the bulk goods are decreasing,
pressure is taken off the membranes and the switch will be
interconnected.
1.3 Technical data
Manufacturer MOLLET
Füllstandtechnik GmbH
Address Industriepark RIO 103
74706 Osterburken
Name Membrane level indicator
Type MFD
Temperature range -20 °C ... +70 °C
Signal contact change-over contact, potentialfree
Capacity of the contact 4 A / 250 V AC
Switching voltage 24 V ... 250 V AC
or 12 V ... 125 V DC
Sensitivity 60 g ... 200 g adjustable
Response delay none
Cable entry Cable gland M20x1.5
Cable connection Scrwe M4
Type of protection IP65 acc. to DIN EN 60529
Overpressure safety up to 5 bar
Weight 0.73 kg
Maintenance none
Mounting position any position
IP
04/13 MFD-BA © by MOLLET 01
Safety instructions
1. The installation,
2. Comply with the local and statutory rules and regulations and/or the VDE 0100.
3. Take notice of the temperature specifications at the data plate.
4. A fuse (with max. 4A) has to be connected in series to the voltage supply.
5. Protect the signal contact from voltage peaks when inductive loads are connected.
6. The device may put into operation if it is closed, only.
7. Switch off the power supply, before opening the device. (touchdangerous voltage)
initial operation and maintenance may be done by a qualified expert with electrical know-how only.
Read and follow these safety instructions first and take notice of the operating instructions.
MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instructions
Ta
Contact
top
002-0202
154
142
7
Ø 128
Ø 124
3.5
25 49
M20x1.5
1.5 Materials
Housing GFK (glass-fibre reinforced plastics)
Type Membrane Mounting ring
MFD-NN = NBR Steel, galvanized
MFD-VN = VITON Steel, galvanized
MFD-NE = NBR Stainless steel 1.4301 / 304
MFD-VE = VITON Stainless steel 1.4301 / 304
Membrane level indicator
MFD

2. Installation
2.1 Preparation
2.2
- The level indicator has to be mounted always with the cable entry
downwards.
2.3 Electrical connection
- Check the membrane of visual transport damage.
- Read and follow the safety instructions and the operating
instructions, before handling with the device !
Mounting in the vessel
- Position the level indicator with the gasket at the provided flange
and fix it with 4 washers and screws M6.
Circuit diagram
2.4 Cable gland
- After electrical connection, tighten the cable gland.
- Screw the cap nut, until the cable entry is closed tightly.
-
3. Commissioning
- Put the level indicator into operation only, if the installation and the
electrical connection have been done correctly.
- The level indicator is presetted at sensitive.
- With the adjusting nut the device can be adjustable insensitive.
Clockwise insensitive.
M LLET
Füllstandtechnik
GmbH
02 MFD-BA 04/13 © by MOLLET
Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
4. Utilization
4.1 Normal operation
- Use the level indicator in its intended application only.
- The level indicator is provided for use in silos or vessels with
pressureless operation.
- Comply with the on the data plate. Check the
membrane of the level indicator, when the permissible temperature
of bulk goods was exceeded or was fallen short off.
- Damaged devices have to put out of operation immediately.
4.2 Inexpert handling
- Ignoring of the safety instructions and the operating instructions.
- Not intended use.
- Mounting of spare parts which are no original parts.
- Violation against applicable law and standards.
-
5. Maintenance and servicing
5.1 General informations
- Do maintenance work only, if the silo or the vessel is empty and
if there is no overpressure or vacuum.
- Use original spare parts only.
5.2
- Inspect in regular intervals if there is any wear or abrasion at the
membrane. Define the control intervals, depending on the
characteristics of the bulk goods.
- In case of damage or abrasion, replace the membrane
immediately with a new membrane.
5.3 Servicing
- Damaged parts have immediately replaced with similar.
- Until the complete reconstruction of the proper function, the level
indicator must not be used any more.
-
6. Storage
- Store the level indicator dry and dust-free.
- Protect the membrane against pointed objects and ultraviolet
radiation.
-
7. 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.
-
specifications
Maintenance
002-AP02
NC NO C
P
23/4 1
1 2
3/4
adjusting nut
Membrane level indicator
MFD

71 2
3 4
6
8
3 4
002-0804
M20x1,5
Single parts
07/21 © by MOLLET MFD-ET-01 03
M LLET
Füllstandtechnik
GmbH
MFD
Membran level indicator
MOLLET D-74706 Osterburken Tel. [phone] www.mollet.de Single parts
9
10 5 3
5 Housing membrane MF-GM-NR Housing membrane in case of VITON design
8 Spare part kit incl. switch MF-EP001 Design for bulk solids touching membrane made of NBR
9 Membrane V . MF-MB-VI Bulk solids touching membrane made of VITON
4 Membrane N . MF-MB-NR Housing membrane or bulk solids touching membrane made of NBR
6 Mounting ring . N MF-HR-ST Steel, galvanized
7 Gasket MF-FD-NR NBR foam
10 Spare part kit incl. switch MF-EP002 Design for bulk solids touching membrane made of VITON
3 Tappet MF-WE001 Aluminium
Item Reference Order code Material
1 Cap seal MF-DS001 NBR
Mounting ring . E MF-HR-VA Stainless steel 304
2 Switch BZ-2R-A2

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Wolfgang Hageleit
Geschäftsführer / Managing director
EU-Konformitätserklärung
EU-Declaration of Conformity
Wir/We MOLLET Füllstandtechnik GmbH
Industriepark RIO 103
D-74706 Osterburken
Tel. [phone] Fax [phone]
erklären in alleiniger Verantwortung, dass das Produkt:
declares under our sole responsibility, that the product:
Membran-Füllstand-Grenzschalter / Membrane limit switch
Membran-Füllstandanzeiger / Membrane level indicator
Typ/Type MFA ... und/and MFD ...
den folgenden Europäischen Richtlinien entspricht:
conforms with the following European directives:
Niederspannungsrichtlinie Low voltage directive 2014/35/EU
Angewandte harmonisierte Normen oder normative Dokumente:
Applied harmonized standards or normative documents:
DIN EN 61010-1:2020 DIN EN 60529:2014
Qualitätssicherung:
Quality assurance: TÜV NORD CERT GmbH, 30159 Hannover (0044)
Osterburken, den 10.09.2022
EUKE-MFA-MFD
M LLET
Füllstandtechnik
GmbH
Diese Erklärung darf nur unverändert weiterverbreitet werden.
This declaration is only allowed to hand out in unchanged form.
05_EUKE-MFA-MFD_1
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