9
Use of K1 and K2 auxiliary contact elements.
For loads with higher voltage and current characteristics than those
indicated in the table above, use of auxiliary external relays or contactors
suitable for the load to be controlled is recommended.
+
If the K1 K2 Feedback is used, The K1 and K2 auxiliary contactors or relays
must be of the guided contact safety type.
•
Referring to the table below, pay particular attention to the
configuration of the control contacts on terminal 11 and that
of the contacts of use.
Relay K1
Relay K2
Control contacts
K1-1 normally closed
K2-1 normally closed
Use contacts
K1-2 normally open
K2-2 normally open
•
Control contacts K1-1 and K2-1 (terminal 13) must be able to
switch a current of 20mA and a voltage of 24Vdc.
•
To increase the electrical life of internal relays A and B, it is
advisable to use anti-disturbance devices which must be
connected across the coils of K1 and K2.
Warnings regarding the connection cables.
•
For light curtain/safety interface connections of more than
50m, cables with a cross-section of at least 1mm
2
must be
used.
•
It is good practice to separate the power supply of the safety
interface from that of other electrical appliances (electrical motors,
inverters, frequency variators) or other sources of disturbance.
•
The path of the connection cables between the safety
interface ands the sensors, the connection referring to the test
command and feedback contacts connected to terminal 13
must be different from that of other power cables.
Summary of Contents for AD SR2
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