cyber
®
dynamic system
Operating manual
Revision: 01
Doc. no.: 5022-D056658
en-43
11.3 Improper use of STO
The STO function must not be used if the drive needs to be stopped for the following reasons:
1. Cleaning, maintenance, or repair work; long interruptions in operation:
In such cases the entire machine or system should be de-energized and secured
(at the main switch).
2. Emergency stop situations:
In emergency stop situations the power supply must be cut off by a line contactor
(Emergency stop push-button).
11.4 Technical data and STO pin assignment
STO input
Data
STO inactive input voltage
12 ... 60 VDC
STO active input voltage
Open
Input current
25 ... 45 mA
Response time (time between activation of
STO function and drive system being free of torque)
< 16 ms
Test time for STO dark test at 24 VDC STO
power supply
< 3 ms
Table 18: Technical data and STO pin assignment
11.5 STO pin assignment
SIL 2 / category 3 PLd:
SIL 3 / category 4 PLe:
SIL 3
Cat. 4 PLe
Safety unit
+24V
GND
SIL 2
Cat. 3 PLd
Safety unit
GND
+24V
STO
STO GND
