Technical Support - DMM
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599 77 23-65 Rev. 03
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13.9 Door safety interlock
13.9.1 General characteristics
The instantaneous door interlock allows the door to be opened as soon as the drum stops, if the conditions
described further are met.
1
Main electronic circuit board
2
Door safety interlock (with Door sensing switch)
2a. Door safety interlock (without Door sensing switch
13.9.2 Operating principle
1.
Solenoid protection PTC
2.
Solenoid
3.
Lifting assembly
4.
Cam (Labyrinth)
5.
Locking pin
6.
Electrical contacts (main switch)
7.
Door sensing switch
8.
Cursor
When the programme starts (start/pause button) the main circuit board sends a voltage pulse, lasting
20 msec., to the valve (2) (at least 6 seconds should have passed since turning it on), which moves the
cam (4) to a locking position; the blocking pin (5) is pushed locking the cursor (8), and simultaneously
the main switch contacts are shut (6).
When the programme ends or the Start/Pause button is pressed, the circuit board sends two additional
20 msec pulses (200 msec apart):
-
The first pulse moves the cam (4) by another position, without releasing the pin (5).
