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cyber
dynamic system
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
STO inactive input voltage
STO active input voltage
Input current
Response time (time between activation of
STO function and drive system being free of torque)
Test time for STO dark test at 24 VDC STO
power supply
11.5 STO pin assignment
SIL 2 / category 3 PLd:
SIL 3 / category 4 PLe:
Revision: 01
STO GND
+24V
GND
STO
GND
+24V
Doc. no.: 5022-D056658
Data
12 ... 60 VDC
Open
25 ... 45 mA
< 16 ms
< 3 ms
Table 18: Technical data and STO pin assignment
SIL 2
Cat. 3 PLd
Safety unit
SIL 3
Cat. 4 PLe
Safety unit
Operating manual
en-43
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