Mollet DF Series User manual

DF28
M LLET
Füllstandtechnik
GmbH
M LLET
Füllstandtechnik
GmbH
DF
DF28
08/10 DF28-BA© by MOLLET 01
Page
Index
MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instruction
Operating instructions
Rotary blade level indicator
Level limit switch for bulk goods
Safety instructions
Operating instructions
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02
03
04
06
06
07
07
08
08
08
08
1. Description
2. Installation
3. Electrical connection
4. Switching logics and function displays
5. Setting of the sensitivity
6. Use of the measuring blades
7. Utilization
8. Maintenance and servicing
9. Storage
10. Disposal
Dimensions
Measuring blades
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09
10
Congratulation, we felicitate to your good choise.
You have decided for a first class branded product, a
from the company
It satisfies highest international standards:
Thank you for having decided for our product.
rotary
blade level indicator .MOLLET
Functionality, versatileness, long service life and design
Competence in rotation

M LLET
Füllstandtechnik
GmbH
02 DF28-BA 08/10 © by MOLLET
DF28
Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
Rotary blade level indicator
Level limit switch for bulk goods
Safety instructions
The installation, initial operation and maintenance may be done by a qualified expert with electrical know-how only.
The connection of the single components as like as measuring blade, anti-buckling protection, shaft extension are
permissible only with the attached pins.
For the electrical connection take notice of the local and statutory rules and regulations and/or the VDE 0100.
Before electrical connection, compare the supply voltage with the details at the data plate.
A fuse (with max. 4 A) has to be connected in series to the voltage supply.
Protect the signal contacts from voltage peaks when inductive loads are connected.
The device may put into operation with intact cap-sealing and if it is closed, only.
Switch off the power supply, before opening the device (touchdangerous voltage).
The level indicator will be delivered with a cable gland M20x1.5.
The second drill-hole is closed with a plug screw M20x1.5.
Optional a further cable gland can be delivered.
The cable gland and the plug screw were screwed on at the factory.
Please check if the cable gland or the plug screw were loose during the mounting
or the transportation. If so, tighten it again.
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 destine 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.
Excessive screw on may injure the type of protection
Cable entry
ATTENTION
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
2.2
2.1
2.3
2.4
Please, read and follow these safety instructions first and take notice of the operating instructions.
By use in explosive hazardous areas read and follow the
of the
first and take notice of the operating instructions.
special conditions and instructions for safe applicate
explosive protection information

Operating instructions
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..
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.
1.2 Construction
1.3 Function
T
a
T
s
p
Contact
M LLET
Füllstandtechnik
GmbH
DF28
08/10 DF28-BA© by MOLLET 03
MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instruction
Rotary blade level indicator
Level limit switch for bulk goods
process connection
protection tube
measuring blade
jib
control head
(housing with motor and switch)
cable gland
1.4 Technical data
1.5 Electrical data
1.6 Materials
Manufacturer
Füllstandtechnik GmbH
Address
Name
Type DF
Ambient temperature
Maintenance
Supply voltage
Cable entry
Type of protection
Connection clamps
Signal contact
Switching voltage
Capacity of the contact
Caution!
Industriepark RIO 103
74706 Osterburken
rotary blade level
indicator
none
cable gland M20 x 1.5
IP 66
max. 1.5 mm²
change-over contact
potentialfree
4 V DC ... 250 V AC
1mA ... 2A
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.
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.
MOLLET
acc. to DIN 60529
see data plate
-20 °C ... +70 °C
see data plate
1 U/min
approx. 1.20 sec.
see data plate
4 VA
4 W
aluminium
or stainless steel 1.4401
aluminium
or stainless steel 1.4301
stainless steel 1.4301
stainless steel 1.4301
stainless steel 1.4301
NBR, black
Viton/Teflon/VA
NBR, white, FDA conform
Teflon
Bulk goods temperature
Pressure range
Measuring blade speed
Response delay
Power consumption AC
DC
Housing
Process connection
Protection tube
Blade shaft
Measuring blade
Sealing ring R0
R1
R2
R5
(order code)
IP
Supply
001-0743

M LLET
Füllstandtechnik
GmbH
DF28
04 DF28-BA 08/10 © by MOLLET
Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
Rotary blade level indicator
Level limit switch for bulk goods
Put the level indicator together with the sealring at the
container and fix the flange by means of suitable
screws.
Flange connection
2. Installation
2.1 Preparation
2.2 Mounting
- 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.
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 too
While installation with a hinged blade, please press
both parts of the blade together and insert them
through the connection socket.
In the container, the blade is unfolding itself.
Thread connection
Hinged blade
ls.
001-0744

M LLET
Füllstandtechnik
GmbH
DF28
08/10 DF28-BA© by MOLLET 05
MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instruction
2.4 Orientation of the housing
Attention!
After mounting, the housing has to be orientated by
turning in such a away, that in case of vertical mounting
the cable gland is directed towards the cable duct.
In case of all the other mounting positions the cable
gland has to be directed vertical to the bottom.
The level indicator has to be installed in this way that
the jib won´t be hit by the filling stream of incoming bulk
goods.
2.3 Mounting of the measuring blades
Cable gland
in direction to
the cable duct
Cable gland
always downwards!
Attention!
During beating the pin into the shaft,
you have to
e counterpart.
support the shaft with
an adequat
Attention!
Ensure that the cable is
tightly in the cable gland.
fixed
Rotary blade level indicator
Level limit switch for bulk goods
001-0745

1~
11 2 346
PE
AC
DC
1~
NL PE
11 2 346
346
346
3. 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.
3.1 Circuit diagram
3.2 Circuit diagram
AC
DC
M LLET
Füllstandtechnik
GmbH
DF28
06 DF28-BA 08/10 © by MOLLET
Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
Rotary blade level indicator
Level limit switch for bulk goods
Switching logics
Arrangement and colours of
the function displayLEDs for
yellow green
green
4. Switching logics and function displays
Symbol signification
= under voltage = LED "OFF"
= full = LED "ON"
= empty
Attention!
Wiring of the level indicator
in a way that no undesirable
switching function can occur
in case of mains voltage failure.
001-AP02
001-AP00 001-AP20
001-AP22
001-0715

+
-
l
-
l
+
M LLET
Füllstandtechnik
GmbH
DF28
01/07 DF28-BA© by MOLLET 07
-
l
+
MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instruction
Rotary blade level indicator
Level limit switch for bulk goods
-
l
+
Spring arm
Bulk density in
Three settings are possible:
for very light bulk goods
suitable for almost all bulk goods
for sticking bulk goods
1. light
2. medium
3. strong
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.
light
medium
strong
Works setting
5. Setting of the sensitivity
As occasion demands, the sensitivity of the level
indicator can be adjusted, referring to the
of the bulk goods, .
characteristics
by shifting the spring arm
Filling level up to 100mm above measuring blade kg/l t/m³
–––––––––––––––––––––––––––––– –––– –––––– t/m³ kg/l
Filling level until measuring blade is compl. covered
0,25 0,35
Socket blade 100x30 –––– ––––
0,4 0,6
0,2 0,3
130x30 –––– ––––
0,35 0,5
0,15 0,2
90x28 –––– ––––
0,3 0,5
0,1 0,15
90x40 –––– ––––
0,2 0,3
0,15 0,25
Blade T200 68x220 –––– ––––
0,3 0,5
0,15 0,25
T50 98x50 –––– ––––
0,3 0,5
0,1 0,2
T100 98x100 –––– ––––
0,2 0,45
0,015 0,02
T250 250x100 –––– ––––
0,02 0,03
0,015 0,02
Rubber blade 250x100 –––– ––––
0,02 0,03
0,15 0,25
X50 98x50 –––– ––––
0,3 0,5
0,1 0,2
X100 98x100 –––– ––––
0,2 0,45
0,025 0,075
X200 180x100 –––– ––––
0,05 0,15
Blade
Measuring blade size light medium
Spring force setting
S1
S2
M1
M2
T0
T1
T2
T5
T8
X1
X2
X3
Socket blade
Socket blade
Socket blade
Blade
Blade
Blade
Blade
Blade
Blade
0,25 0,35
Blade X40 44x50 –––– ––––
0,4 0,6
0,05 0,07
Hinged blade T230 200x30 –––– ––––
0,08 0,12
0,45 0,65
Blade 126x8 –––– ––––
0,55 0,75
0,5 0,7
Blade 98x8 –––– ––––
0,6 0,8
XM
K1
SG
TG
6. Use of the measuring blades
Lowest bulk density, the measuring blades can be
used for.
001-0229

M LLET
Füllstandtechnik
GmbH
DF28
08 DF28-BA 08/10 © by MOLLET
Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
Rotary blade level indicator
Level limit switch for bulk goods
7. Utilization
8. Maintenance and servicing
7.1 Putting into operation
7.2 Normal operation
7.3 Inexpert handling
8.1 Maintenance
8.2 Servicing
- 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.
- Use the rotary blade level indicator in its intended
only.
- 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.
of the safety instructions and the operating
instructions.
- 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.
- 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.
- 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.
- Ignoring
- U the rotary blade level indicator in not
intended use.
application
tilization of
9. Storage
10. Disposal
- 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.
- 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.

protection
tube
143
25
92x88
><L
jib length
><LE
lengthprotection tube
><LF
blade length
standard = 800 mm
length
L = LE + LF
><
LT
Ø150
70°C
E1
E2
E3
E4
LT = 290
LT = 290
LT = 290
LT = 450
max. 5°
F1
Support is
for
length as from
2,000 mm.
recommended
with option
any mounting position
KD
DF28
M LLET
Füllstandtechnik
GmbH
08/10 DF28-BA© by MOLLET 09
Dimensions
process connection
heat protection shield
M20x1.5
E1
E2
E3
E4
up to 150°C
200°C
260°C
500°C
up to
up to
up to
temperature
decoupling
bell housing
(to protect the control head
from overheating)
Application instructions
Mounting position
Mounting position KD
Bend capacity at the protection tube
vertical
with option any
max.F1860 Nm
±5°
Rotary blade level indicator
Level limit switch for bulk goods
MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instruction
F1
001-0129
001-0262
001-0260
001-0131

1
H
B
B
><
LF
BHLF
X1
X2
X3
........ 98 ......... 50 ......... 52
........ 98 .........100 ......... 102
........180 ......... 100 .........102
1
><
LF
H
B
2
><
LF
H
B
........ 90 ......... 28 ......... 72
........ 90 ......... 40 ......... 70
BHLF
M1
M2
BHLF
T1
T2
T3
T5
T8
........ 98 ......... 50 ......... 52
........ 98 .........100 ......... 102
........200 ......... 100 .........102
........250 ......... 100 .........102
¹) ...... 250 .........100 ......... 102
¹) Blades 10 mm thick
in rubber NBR, black
><
LF
30
1
200
52
30
52
118
130
1
><
LF
><
LF
272
220
68
1
DF28
M LLET
Füllstandtechnik
GmbH
10 DF28-BA 08/10 © by MOLLET
Measuring blades - dimensions
TO Blade
K1 Hinged blade
S2 Socket blade
XBlade
TBlade
MSocket blade
Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
Rotary blade level indicator
Level limit switch for bulk goods
2 mm at , reinforcedS2V
2 mm at and , reinforcedT1V T2V
001-0239
001-0230
001-0234
001-0236
001-0711
1
H
B
B
><
LF
001-0233