cyber
®
simco
®
drive 2 operating manual
en-50
5022-D057946
Revision: 02
10.4 Intended use of STO
The STO function is designed only for functionally safe switching of a drive to torque OFF and
to prevent restarting. In order to achieve functional safety, the wiring of the safety circuit must
meet the safety requirements of EN 60204, EN 12100, EN 61800-5-2, EN 61508 and/or EN
13849-1.
10.5 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
(with emergency stop pushbutton).
10.6 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 motor being free of torque)
< 15 ms
Test time for STO dark test at 24 VDC STO
power supply
< 3 ms
Table 16: Technical data and STO pin assignment
10.7 STO pin assignment
10.7.1 STO device version IP65 decentral SIM20xxD-
FC…
SIL 2 / category 3 PLd:
SIL 3 / category 4 PLe:
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