Electrical installation
INTORQ | BA 14.0201 | 04/2016
24
Pin assignment for microswitch
Fig. 8
BFK466 terminal box (optional: parallel connection, with built-in varistor)
When current is fed to the spring-applied brake, the armature plate is released. The microswitch (NO contact)
is actuated and gives the signal “Spring-applied brake released".
When the maximum working air gap is exceeded, the wear monitoring circuit is closed. In this case, the signal
"Spring-applied brake released" will also be given when the brake is de-energized.
AA
Microswitch
B
Ground/earth
C
Brake
Microswitch:
Input connection
BK
N/O contact
BU
NC contact
GY
Brake released
Brake worn-out
Circuit
no
no
open
yes
no
closed
no
yes
closed
yes
yes
closed
Tab. 3:
Microswitch (NO contact, parallel connection)
A
C
B
