Siemens SIRIUS 3RW44 - Page 119

Circuit Examples
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 02
8-5
8.1.4 3RW44 in a Standard Circuit and DC Braking
3)
Stopping Function for Device Types 3RW44 26
to 3RW44 47
1) For permissible main and control voltage values, refer to Technical Data, pages 9-7 to 9-11.
2)
2) Caution: risk of restart!
The start command (e.g. by the PLC) must be reset before a reset command is issued, since an automatic
restart is executed when a start command is pending after the reset command is issued. This especially
applies to motor protection tripping. For safety reasons it is recommended to integrate the group error output
(terminals 95 and 96) into the control.
3) If the "Combined braking" stopping function is selected, no braking contactor is required.
If the "DC braking" function is selected, a braking contactor must be additionally used.
For types, refer to the "Branch component layout (standard circuit)" table on Page
9-16.
The "DC braking" function is recommended for applications with larger centrifugal masses (J
Load
> J
Motor
).
Output 2 must be set to "DC braking contactor".
4) K4 auxiliary relay, e.g.:
LZX:RT4A4T30 (230 V AC rated control supply voltage),
LZX:RT4A4S15 (115 V AC rated control supply voltage).
Main circuit Control circuit
K2 K3
33
G1
F3
T1 T2 T3
M1
NSB0_01503
L1 L2
L3
V1U1 W1
M
PE
3~
Q1
L3
L2
1)
(optional
semi-
conductor
protection)
L1 3/N/PE 400 V AC , 50 Hz
13
14
23
24
33
34
95 98
96
+
T1 T2IN4IN3IN2IN1L-L+A1
A2
N
PE
PE
G1
NSB0_01504
K4 K4
K3 K2
K2 K3
+24 V DC
M
F2
K4
4)
PLC output
No action Group error
No action No action
ON period
PTC type A or
Thermoclick
Motor on right
L1 1/N/PE 230 V AC
1)
, 50 Hz
DC braking contactor
3)
PLC inputs