Figure 8-23: Circuit Diagrams, 3Rw31 - Siemens sirius System Manual

3RW31
Automatic operation
Control via PLC
SIRIUS System Manual
GWA 4NEB 430 0999-02b
N (L-) L1 (L+)
ON/OFF
Ramp 1
ON/OFF
Ramp 2
1
A2 A1
2
OFF
F2
F3
ON ON
K1 K2
Ramp 1 Ramp 2
K2 K1
K1 K2

Figure 8-23: Circuit diagrams, 3RW31

Direct starting of the soft starter is possible as long as the auxiliary supply is
applied at terminals A1 and A2. To this end, a jumper is required between
the auxiliary supply contact A1 and the control contact IN.
The following must be taken into consideration:
• An on delay of up to 4 seconds can occur, depending on the frame size.
• Soft coasting down is no longer possible after the auxiliary supply is
switched off.
The 3RW3 soft starter can be controlled by means of a programmable con-
troller (PLC). It is connected up in the same way as for control via switch.
Important
Always ensure that A1 and A2 are connected up correctly. Although polarity
reversal cannot damage the device, it can lead to malfunctioning.
3RW3 semiconductor motor control unit
N (L-) L1 (L+)
K1
K2
A2 A1 1
2
F1
3RW31
K1
3RT
3RU/3RB10
F2
M
3~
. /.P
3RT
K2
3RU/3RB10
F3
8-39