Becker S20 MLS Montage- Und Betriebsanleitung Seite 20

Assembly and Operating Instructions
Safety edge
The following safety edge systems can be connected to the S20 MLS door control
unit:
• Pneumatic safety edge (DW).
• Electric safety edge (EL).
• Optical safety device (OSE).
The required sensor is integrated into the control unit (self-monitoring sensor as per
EN 12453).
The pneumatic safety edge or the electric safety edge is connected to terminals 8
and 9 (EL/DW) and monitored via a terminating resistor. This resistor must be con-
nected in the pressure switch contact or at the end of the electric safety edge as per
the S20 MLS connecting diagram.
Check the terminating resistance of factory-assembled electric safety edges. Safety
edges with a 1.2 kΩ or 8.2 kΩ terminating resistance may be used.
Connect the OSE optoelectronic safety edge made by Vitector (Fraba) to terminals 6,
7 and 8 (OSE) directly without a terminating resistor (6 – white wire, 7 – green wire,
8 – brown wire).
To adapt the control unit to the respective safety edge, set DIP switches 1, 2 and 3
according to the following table.
Type of safety edge
Pneumatic safety edge 1.2 kOhm
Pneumatic safety edge 8.2 kOhm
Electric safety edge 1.2 kOhm
Electric safety edge 8.2 kOhm
Optoelectronic safety edge OSE
Caution!
When using a pneumatic safety edge, the DIP switch 2 must always
be set to the ON position, as the functioning of the pneumatic safety
edge cannot otherwise be properly monitored. When delivered, safe-
ty devices may be bridged. Before initial use, always check that no
non-permissible bridging exists.
If the safety edge responds during downward movement, the door is stopped in-
stantly by the S20 MLS control unit. After an internal time of 0.3 s has elapsed, the
S20 MLS opens the door again.
20
DIP 1 DIP 2
OFF ON
OFF ON
OFF OFF
OFF OFF
ON OFF
DIP 3
ON
OFF
ON
OFF
OFF