Test; Characteristics Of The Signal; Connection Options For The Test Signal - ASO Safety Solutions SK 35 Manuel D'utilisation

SK 35 Safety Relay

8.4 Test

For a standard-compliant design of the protection, the primary machine control must perform a test
prior to each dangerous movement or during the non-dangerous phase/movement of the machine.
The test is intended to ensure the proper function of the safety relay. After application of the test
signal, both output terminals of the switching unit must open. This change in switching state must
be evaluated by the primary machine control. If the test result is correct, the machine control then
initiates the movement or the next work step. Otherwise, the control must output an error message
and the power-driven work equipment (e.g. motor) must receive a switch-off signal from the machine
control. If the machine control detects an error fault in the safety device, the machine control must
maintain a safe state until the error is rectified.
If only one channel is used, the other may remain unmonitored during the test.
If DIP switch S1 is in switch position "Off", the test is performed upon application of a voltage to
terminals T1 and T2; if "On", the test is performed if no voltage is applied.

8.5 Characteristics of the signal

8.6 Connection options for the test signal

AC/DC
B1
Z1 Z2 T1 T2
Voltage
Test duration
With testing by the control, the SK 35 system satisfies the Cat. 2 requirements
in accordance with EN ISO 18349-1:2008 "Safety-related parts of control
systems".
Without testing, the operation or wiring of the SK 35 satisfies no specific
safety requirements.
20
Test signal S1 Pos. "Off"
Test signal S1 Pos. "On"
Switching output (symbolic)
B1
Z1 Z2 T1 T2
U 12 V ... 28 V AC or DC
Test
T 120 ms
Test
+DC
AC/DC
B1
Z1 Z2 T1 T2
+DC
B1
Z1 Z2 T1 T2