Mollet MFB Quick Start Manual

M LLET
Füllstandtechnik
Read and follow these safety instructions first and take notice of the operating instructions.
Safety instructions
attached
1. The installation, initial operation and maintenance may be done by a qualified expert with electrical know-how only.
2. Comply with the local and statutory rules and regulations and/or the VDE 0100.
special conditions and instructions
3. Take notice of the temperature specifications at the data plate.
for safe application
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.
first and take notice of the operating instructions.
6. The device may put into operation if it is closed, only.
7. Switch off the power supply, before opening the device. (touchdangerous voltage)
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 100 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 membrane.
A tappet directly transfers the pressure from the membrane to the
switch. When the bulk goods are decreasing, pressure is taken off
the membrane and the switch will be interconnected.

1.3 Technical data

Manufacturer
Address
Name
Type
Bulk goods NBR
temperature VITON
Stainless steel 304
Ambient temperature
Signal contact
max. Switching voltage Capacity of the contact
max. Braking capacity Switching voltage
Response delay
Cable entry
Cable connection
Type of protection
I P
acc. to DIN EN 60529
Overpressure safety
Weight
Maintenance
Mounting position
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
By use in explosive hazardous areas read and follow the
MOLLET
Füllstandtechnik GmbH
Industriepark RIO 103
74706 Osterburken
Membrane level indicator
MFB-B0 MFB
-20 °C ... +80 °C
-20 °C ... +150 °C
T s
-20 °C ... +200 °C
T a
-20 °C ... +80 °C
change-over contact, potentialfree
4 A / 250 V AC see Type plate
t a c t t a c t
C o n C o n
see Type plate 24 V ... 250 V AC
or 12 V ... 125 V DC
none
Cable gland M20x1.5
Scrwe M4 for cable socket
IP40
IP53
if cable gland is downwards
IP65
with stainless steel membrane
up to 5 bar
1.85 kg
none
any position
Membrane level indicator
MFB
1.4 Dimensions

1.5 Materials

Housing
Type
MFB-NA = NBR
MFB-NE = NBR
MFB-VA = VITON
MFB-VE = VITON
MFB-EA = Stainless steel 304 Aluminium
MFB-EE = Stainless steel 304 Stainless steel 1.4301 / 304
Operating instructions
B0
5 x 72°
7
200
214
Aluminium
Membrane Mounting ring
Aluminium
Stainless steel 1.4301 / 304
Aluminium
Stainless steel 1.4301 / 304
02/20 02/20
© ©
by MOLLET by MOLLET
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4 M20x1.5
14
60
002-0205
MFB-BAD MFB-BA 01 01