Siemens SINAMICS Series Operating Instructions Manual page 717

In the case of SS1 applications, the quick stop function OFF 3 (undelayed contact block,
terminal X177.15 DI/DO 4) of SINAMICS DCM is guided via the safety relay.
Note
In the case of SS1 applications, the OFF 3 ramp of the SINAMICS DCM and the setting of
the delay time on the safety relay, must be manually set to the process and adjusted and
coordinated with one another when commissioning the system.
Principle
Legend for SINAMICS DCM applications:
Q
A[n]
Q
F[n]
K
AH[n]
K
FH1
DI/DO 4
K
FH1
K
AH[n]
STO
RM1 / RM 2,
106, 109,
110
P24
M24
PE
L, N
U<
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
Armature contactor
Field contactor
Safety-related interface relay to control the armature contactor
Safety-related interface relay to control the field contactor
Programmable digital input 4, X177.15 (to select OFF3 = fast stop)
K Phoenix Contact, PSR-SPP-24DC/FSP/1X1/1X2 - 2981981
AH1
Activation/deactivation STO on SINAMICS DCM
Connection for feedback circuits and safety relay on SINAMICS DCM
24 V supply via X177.9
24 V ground via X177.23
Protective conductor connection
Maximum supply voltage, 250 V
Undervoltage release 3WL circuit breaker
Positively-driven contacts = combination of NO and NC contacts is designed so that
they can never be simultaneously closed
Mirror contact = auxiliary NC contact that cannot be closed simultaneously with a
main NO contact.
Switch position = black
AC
Functional safety
13.5 Application examples
715