Rotation Direction Reversal With Soft Stop Ramp - Eaton DS7 Manual

7.1.5 Rotation direction reversal with soft stop ramp

L1
L2
L3
PE
Q1
I > I > I >
Q11
F3
Q21
M
M1
3 ~
Figure 86: Rotation direction reversal with ramp
L01/L+
Q1
STOP
K1
FWD REV
K2 K1
Q12
Q11
K1 K2
L00/L-
FWD REV
Figure 87: Control section Bidirectional operation
￫
The control voltages (+U
control must have the same potential: 24 V DC/AC or 120/230 V AC
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com
Q12
- A2 + U
s
(+) U
s
24 V AC/DC, 120/230 V AC
(–) U
s
K1 K2
K2
A1 B1 A1
Q21 K4T
A2 A2
DS7 t > t-Stop
) of the DS7 soft starter and the contactor
S
7 Connection examples
7.1 Size 1 (4 – 12 A)
Q1 = Cable and motor
protection
Q11 = mains contactor FWD
(clockwise rotating field)
Q12 = mains contactor REV
(anticlockwise rotating field)
F3 = optional semiconductor
fuse for type 2 coordination in
addition to Q1
K4T
K1 Q11 K2 Q12
Q11 Q12
FWD REV
K4T: Simulated RUN
signal -
K2T is an off-delayed
timing relay (type ETR2)
and simulates here the
RUN signal. The reset
time must be greater
than the stop time (t-
Stop) set on the soft
starter. Switching to the
other operating
direction is only
possible after the value
set here has elapsed.
The soft stop is also
active here after an
emergency-stop
command.
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