Explanation Of The Device's Functions - Siemens SIRIUS 3SK1 Manual

Configuration / operation

10.2 Explanation of the device's functions

10.2 Explanation of the device's functions
Explanation of the device functions (DIP switches)
DIP Parameter
switch
1 Start type
2 Cross-circuit
detection
3 Type of
connection
4 Startup testing
190
Function
Autostart: The safety-related outputs are switched to the active position as soon as the
•
switch-on condition is satisfied at the sensor inputs IN1, IN2, INF and INK. The START
button connecting terminal INS is not queried.
Monitored start: The safety-related outputs are switched to the active position as soon
•
as the switch-on condition is met at the IN1, IN2, INF and INK sensor inputs and the
START button at the INS terminal is actuated (start with the falling edge).
Cross-circuit detection is only possible with floating sensors. The sensors must be
connected between T1 - IN1 and T2 – IN2. At the terminals IN1 and PAR (if used), the test
signal of terminal T1 is expected; at the terminals IN2 and INF , the test signal of T2 is
expected. The device detects a sensor fault if the signal at the terminals IN1, PAR or IN2,
INF does not match the test signals T1, T2.
Cross-circuit detection must be deactivated if electronic sensors such as light arrays or
laser scanners are connected. The 3SK1 now no longer monitors the sensor inputs for
cross-circuit detection. Usually, the outputs of safety sensors (OSSD) are already
monitored for cross-circuits in the sensor.
Devices with PAR terminals expect the test signal T2 at the parameterization input. A 24 V
signal at the PAR or INF terminals results in a fault (cross-circuit at the input).
1 sensor with 2 contacts (1 x 2-channel) (NC/NC).
•
It is expected here that both contacts be open simultaneously.
With the additional connection of T1 to PAR, this DIP parameterization applies to ONE
2-channel sensor with NC/NO contacts.
2 sensors with one contact each (2 x single-channel) (NC/NC).
•
It is expected that both sensors are ANDed. Simultaneity is not monitored.
After a power failure, startup testing requires that the sensors at IN1 and IN2 are actuated
once by the system operator.
SIRIUS 3SK1 safety relays
Manual, 06/2018, A5E02526190021A/RS-AD/004