2
EN
Operating instructions
Level switches for bulk materials
MAF/S 441
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
MAF/S 441-11Y
2.2 Destination and use
Level switch is for the monitoring of the material flow in the silos and
the storage container.
They can be deflected in any direction.
2.3 Technical data
Standards:
IEC 60947-5-1
Enclosure:
Aluminium
Protection class:
IP65
Contact material:
Silver
Switching system:
snap action with double break
Switching elements:
snap action: change-over contact
Cable section:
max. 2.5 mm²
Cable entry:
M20 x 1.5
Rated impulse withstand voltage U
imp
:
4 kV
Rated insulation voltage U
i
:
250 V
Thermal test current I
the
:
16 A
Utilisation category:
AC-15: 4 A / 240 V
Max. fuse rating:
16 A gG D-fuse
Required short-circuit current:
1000 A
Contact break:
max. 2 x 6.0 mm
Switchover time:
35 ms
Bounce duration:
5 ms
Ambient temperature:
−30 … +90°C
Mechanical life:
1 million operations
Switching frequency:
max. 3000 / h
Actuating speed:
max. 1 m/s, min. 1 mm/s
3. Mounting
3.1 General mounting instructions
Fitting is only authorised in a de-energised condition
Two mounting holes are available. The use of a protective ground wire
is imperative.
3.2 Dimensions
All measurements in mm.
PG13,5
61
26
106
86
75
73
9
9
441.5
269
90
¤90
3.3 Correct assembly position
Mount the level switch away from the flow of material.
Image 1; Correct mounting
Image 2: Incorrect mounting
4. Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
Cable glands (included in delivery) are only authorised for permanent
cables. The person installing must provide for the necessary strain
relief. Unused openings must be sealed with locking screws (included
in delivery).
4.2 Switch travel diagrams
Snap action
1 NO contact / 1 NC contact
0°
15° 15°
30°
30°
