Siemens SIRIUS 3SK1

Product-specific safety information
2.1 General safety notes
3SK1 safety relays
16 Manual, 04/2013, A5E02526190021A/RS-AA/01
CAUTION
Protection against electrostatic charge
When handling and installing the 3SK1 safety relays, ensure that the components are
protected from being electrostatically charged. Changes to the system configuration and
wiring are only permissible while the supply voltage is switched off.
Connection of 3SK1 safety relays is only permissible when the power supply units (PELV
and SELV) are switched off.
CAUTION
Noise immunity / grounding
The following must be grounded in accordance with the regulations to ensure noise
immunity of the 3SK1 safety relays:
• PELV / SELV power supply units (please also note the documentation for the respective
power supply unit in this regard).
Note
Operational faults and malfunctions in communication
If the EMC Directive 2004/108/EC is not complied with when plants and devices are
installed, communication breaks may occur.
Note
Cover the 3ZY12 device connector on the left-hand side using the cover supplied with the
device termination connector.
WARNING
3SK1..1 and 3SK1..3 (devices with outputs using contacts):
In continuous operation, the key safety values apply in the case of a function test interval
(state change of the outputs) ≤ 1 year.
3SK1..2 (devices with solid-state outputs):
In continuous operation, the key safety values apply in the case of a function test interval
(state change of the outputs) ≤ 1 year.
Note
Annual function test
• Actuate the connected sensors.
• Check their effect on the safety relay and the downstream actuators.
• Activate the safety relay via the connected sensors.
• Check their effect on the safety relay and the downstream actuators.
• Defective devices must be replaced.