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Description
U
(L1-L2)
B
Enable (8-9)
Motor contactor
Reset contact
Brake contactor
Braking current
Overtemperature
t
: Enable at terminal 8-9
1
t
: Motor on
2
t
: Braking time
3
Fig. 1: Brake for preset time
After safety time t
external brake contactor) and the brake contactor energises.
After safety time t
current I
After the set braking time t
detecting the standstill signal, or the set monitoring time has been
exceeded (brake until standstill) the thyristor is deactivated and safety
time t
The brake contactor is de-energised after safety time t
the contacts 8-9 close, and once again the motor controlis enabled.
INFORMATION
If brake until standstill is used and infinity has been selected as the time,
the motor temperature or the time must be monitored externally.
4
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1
0
1
0
1
0
1
(6-7)
0
1
0
1
0
1
0
t
t
t
t
1
2
V1
V2
has elapsed, the contacts Y11 and Y12 close (with
V1
has elapsed, the thyristor is activated and the braking
V2
flows to the motor via the terminals U-V .
B
starts.
V3
t
t
t
3
V3
V4
t
: Overtemperature
4
t
... t
: Safety times
V1
V4
has elapsed (brake for preset time) or due to
B
t
4
has elapsed and
V4
PKB-M, PKB-MS Operating Manual
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