Siemens SIRIUS System Manual

3RW3 semiconductor motor control unit
SIRIUS System Manual
GWA 4NEB 430 0999-02b
8-39
3RW31
Figure 8-23: Circuit diagrams, 3RW31
Automatic operation
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.
Control via PLC
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.
A1
1
ON/OFF
A2
2
ON/OFF
Ramp 1
Ramp 2
A1A2 1
K1
2
K2
L1 (L+)
N (L-)
N (L-)
L1 (L+)
OFF
ON ON
K1
K1
K1K2
K2
K2
Ramp 1 Ramp 2
F2
F3
M
3~
. /.P
F1
3RU/3RB10
3RT
3RU/3RB10
3RT
K2
K1
F2
F3
3RW31

Siemens SIRIUS Specifications

General

Product brand name	Siemens
Series	SIRIUS
Coil Voltage	24V DC, 110V AC, 230V AC
Switching Capacity	Up to 10A
Mounting Type	DIN rail
Product designation	SIRIUS
Contact Material	Silver alloy
Contact Rating	Varies depending on the specific SIRIUS relay model (e.g., 6 A at 250 V AC, 10 A at 250 V AC)
Switching Voltage	Varies depending on the specific SIRIUS relay model (e.g., 250 V AC, 400 V AC)
Mechanical Life	Up to 10 million operations
Electrical Life	Up to 100, 000 operations
Operating Temperature	-25°C to +55°C
Protection Class	IP20
Size of relay base	Varies depending on the specific SIRIUS relay model