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APPLICATION EXAMPLES
TMS7 SERIES ME00070B 27
8.3 Soft Braking
I34 I33 I12 I11I 21I2 2
START STO P RESET
K2A S3
S3 RESET PUSHBU TTON
S2 STOP PU SHBUTTON
BR AKE DELAY TI MER
RUN DEL AY TIMER
K2T
K1T
LINE CONTACTO R (RUN)K1M
LINE CONTACTO R (BR AKE)K2M
S1 START PUSHBUTTO N
K1 A RUN RELAY
LEG EN D
K2 A START RELAY
K3 A BRAKE RELAY
K4 A ROTATION SENSING RELAY
A2 SHAFT RO TATION SEN SO R
F1 SEMI -CO NDUCTOR FUSES (OPTION AL)
CON TRO L
SUPPLY
K1 A K3A
K1 M
K1TK2T
K2M K1A K2A
K1T K2 T
K1 M K2M
K1M K2M
S2
S1 K1 A
K3A
K4 A
K1A
A2
K4 A
Y1
Y2
Y1
Y2
T2
T3
R11
R12
RELAY
OUTPUT C
A1 A2
CONTROL
SUPPLY
A3
SUPPLY
CO NTR OL
C1 C2
E
THERMISTO R
IN PUT
THERMISTO R
IN PUT
L1 L 2 L3
T1
F1
K2M K1 M
3 PHASE
SUPPLY
M1
CO NTACTORS TO BE
MECHANICAL LY
INTERL OCKED
FLC SELECT
I44 I 43
K3 A
Description:
For high inertia loads that require more braking torque than is available from the D.C.Brake feature, the TMS7 can be configured for 'Soft
Braking'.
In this application the TMS7 is employed with forward run and braking contactors. On receipt of a start signal (pushbutton S1) the TMS7
closes the forward run contactor (K1M) and controls the motor according to the programmed Primary Motor Settings.
On receipt of a stop signal (pushbutton S2) the TMS7 opens the forward run contactor (K1M) and closes the braking contactor (K2M) after a
delay of approximately 2-3 seconds (K1T). K3A is also closed to activate the Secondary Motor Settings which should be user programmed
for the desired stopping performance characteristics.
When motor speed approaches zero the shaft rotation sensor (A2) stops the soft starter and opens the braking contactor (K2M).
Function Settings:
- Function 23. Relay Output C Functionality = 0 (Assigns the Trip function to Relay Output C)
- Functions 1~9 (Sets starting performance characteristics)
- Functions 80~88 (Sets braking performance characteristics)