Electrical installation
INTORQ | BA 14.0201 | 04/2016
22
Pin assignment for microswitch
Fig. 6
BFK466 terminal box (optional: series connection, with built-in varistor)
When current is fed to the spring-applied brake, the armature plate is released. The microswitch (NC contact)
is actuated and gives the signal “Spring-applied brake released".
When the maximum working air gap is exceeded, the release monitoring circuit is opened by the wear mon-
itoring microswitch connected in series. In this case, the signal "Spring-applied brake applied" will not be giv-
en 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
closed
yes
no
open
no
yes
open
yes
yes
open
Tab. 2:
Microswitch (NC contact, series connection)
A
C
B
