Test; Characteristics Of The Signal; Connection Options For The Test Signal - ASO Safety Solutions SK 34 Manuel D'utilisation

SK 34 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, the output
terminal 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 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 34 system satisfies the Cat. 2 requirements in
accordance with EN ISO 13849-1:2008 "Safety-related parts of control systems".
Without testing, the operation or wiring of the SK 34 satisfies no specific safety
requirements.
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Test signal S1 Pos. "Off":
Test signal S1 Pos. "On":
Switching output (symbolic)
AC/DC
B1
Z1 Z2 T1 T2
U 12 V ... 28 V DC or AC voltage
Test
T 120 ms
Test
+DC
B1
Z1 Z2 T1 T2
+DC
B1
Z1 Z2 T1 T2