Wiring with the 3RW55 Failsafe soft starter
The example shows the 3RW55 Failsafe soft starter with a Standard circuit.
0
4
/
/
3(
///
777
4
0
89:
/
',
',
',
',
/
0
7
7
1&
)0
)',
12
12
$48
$4
$4,
12
1&
$$
4
/
/
1
/
6
3
6
6
S1 Switch: Start/stop
S2 Pushbutton: EMERGENCY OFF
S3 Pushbutton: Reset
Q1 Motor starter protector
Q11 3RW55 Failsafe soft starter
M1 Motor
P1 Indicator light
PE Protective conductor
A.4.2 EMERGENCY STOP shutdown to SIL 3 STO with a 3RW55 Failsafe soft starter
without coupling of the digital input DI to the failsafe digital input F-DI
Together with an additional motor contactor connected between the 3RW55 Failsafe soft starter
and motor, two-channel STO applications can be implemented with the 3RW55 Failsafe soft
starter up to integrity level SILCL 3 according to IEC 62061 and PL e / Cat. 4 according to
EN ISO 13849‑1 (two-channel shutdown using the 3RW55 Failsafe soft starter in one of the two
channels). The safe signaling output (F‑RQ) of the 3RW55 Failsafe soft starter and the auxiliary
contacts of the contactor are monitored by a higher-level safety relay with SIL ≥ 2 (e.g. 3SK1).
The control commands at the failsafe digital input F‑DI of the 3RW55 Failsafe soft starter and at
the contactor come from 2 failsafe outputs of the higher-level safety relay.
Example circuits
A.4 3RW55 Failsafe soft starter
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006 347
To Next Page
Loading...
