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11 The m otor has two (internal) switches: - an “end stroke” switch (switches over at the end of each stroke) (the bottom switch in the diagram). - a switch that is mechanically connected to the locking button (switches over at the beginning of each upward or downward movement of the locking button) (the top switch in the diagram). Note: A m echanical connection (rod linkage) between the cylinder lock and the locking button is m aintained. Conditions: door unlocked. - The door is locked using the button/key . The top switch is directly switched over via the rod linkage. As a result, a current will flow through the fuse, connection 30B, the motor ,the bottom switc h and the top switch through connection 31 to earth. B ecause of the mechanical connection between the m otor and the locking button, the button m oves downwards. W hen the lower position is reached, the “end stroke” switch (the lower switch in the diagram) switches over .T he forces are transmitted from the motor to the locking button via a crank/connecting rod linkage. - The door is locked using switch C 774. When spring-loaded switch C774 makes a connection between connections 3 and 7, connection point DL of B200 is connected to earth. A s a result, a current will flow through the fuse, connection 30B, the motor and the bottom switch to earth. A brief moment is suf ficient to start the m otor .S ince there is a mechanical connection between the m otor and the locking but ton, th e top swit ch will swit ch over immediately .A current will pass until the “end stroke” switch interrupts the circuit . Conditions: door locked. - The door is unlocked using the button/key . The top switch is directly switched over via the rod linkage. As a result, a current will flow through the fuse, connection 30B, the motor ,the bottom switc h and the top switch through connection 31 to earth. B ecause of the mechanical connection between the m otor and the locking button, the button m oves upwards. W hen the lower position is reached, the “end stroke” switch (the lower switch in the diagram) switches over .T he forces are transmitted from the motor to the locking button via a crank/connecting rod linkage. - The door is unlocked using switch C774. When spring-loaded switch C774 makes a connection between connections 3 and 1, connection point DO of B200 is connected to earth. A s a result, a current will flow through the fuse, connection 30B, the motor and the bottom switch to earth. A brief moment is suf ficient to start the m otor .S ince there is a mechanical connection between the m otor and the locking but ton, th e top swit ch will swit ch over immediately .A current will pass until the “end stroke” switch interrupts the circuit . 200520 4-59 Changes in the electrical system from chassis number 0E659894 5 CHANGES IN THE ELECTRICAL SYSTEM CF65/75/85 series ≥0E621376 |