Instruction
Manual
SF2
Series
19
4.1. Notes on the connections
For the correct functioning of the
SAFE
asy
TM
safety light curtains, the
following precautions regarding the electrical connections have to be
respected:
•
Do not place connection cables in contact or near high-voltage
cables (e.g. motor power supplies, inverters, etc.). The correct
functioning of the safety device can be compromised by the presence
of strong electro-magnetic fields.
•
Do not connect in the same multi-pole cable the OSSD wires of
different light curtains.
•
The TEST wire must be connected through a N.C. button to the
supply voltage of the ESPE. A daily manual test is necessary to
verify the correct functioning of the safety light curtain. Press the
relevant button to activate the test.
•
If TEST is connected to 0 Vdc, or unconnected at the system
powering, the light curtain enters in the BREAK condition (
see
section 7 “Diagnostic functions”
).
•
The TEST push-button must be located in such a way that the
operator can check the protected area during any Test and Reset
operation. (
see section 6 “Reset mode”
).
•
Class 3 does not allow the ground
connection of the two units and a
SELV/PELV power supply is
compulsory.
•
Class 1 states that the ground
connection and the symbol for
connection of the two units is
compulsory (using the special screw –
supplied with the device – instead of
one of the 6 screws that lock the heads
of each bar) and a SELV/PELV power
supply is recommended.
ground
connection