3
Safety concept
Drive safety functions according to EN 61800-5-2
Manual – MOVISAFE
®
CS..A Safety Card (Version 2)
20
3.7.3
SS1(b) – Safe Stop 1 with monitoring of the deceleration ramp
When the SS1(b) function is active, the drive inverter brings the motor to a standstill e-
lectrically. The deceleration is monitored. The STO drive safety function is triggered
when the monitored deceleration is exceeded or when standstill is reached.
This drive safety function corresponds to a controlled stop of the drive according to
EN 60204-1, stop category 1.
t
V
t
1
t
2
9007201225616011
= Drive safety function monitoring
= Drive safety function trips
v
= Speed
t
= Time
t
1
= Point in time when SS1(b) is activated and motor deceleration is triggered.
t
2
= Point of time when STO is triggered.
28482271/EN – 03/2019
