Automatic Start; Manual Start - Siemens SIRIUS 3SK1 Manual

Safety systems - General information
4.3 Basic terminology
4.3.7

Automatic start

For an automatic start, the device is started without manual confirmation, but only after the
input image has been checked and a positive test of the safety relay has been conducted.
This function is also known as dynamic operation and is not permissible for EMERGENCY
STOP devices. Safety devices for prohibited danger zones (e.g. position switches, light
arrays, safety shutdown mats) can use the automatic start function if this does not pose any
risk.
Note
An automatic start is not permitted for EMERGENCY STOP devices.
Information about start response in the system configuration 3SK1 Advanced units can be
found in the chapter "Explanations of device function (Page 190)".
4.3.8

Manual start

For a manual start, the device is started by operating the START button, but only after the
input image has been checked and a positive test of the safety relay has been conducted.
On a manual start, the START button is not monitored for correct operation, a positive edge
of the START button is sufficient for starting.
Note
The "Manual start" function is only available with the 3SK1111 safety relays (slide switch at
Autostart position).
Note
Manual start is not permitted for EMERGENCY STOP devices.
Figure 4-3
36
Start function "Manual start"
SIRIUS 3SK1 safety relays
Manual, 06/2018, A5E02526190021A/RS-AD/004