Rockwell Automation 442L SC300 Safety Sensor User Manual - Manual (Page 29)

Rockwell Automation Publication 10000202762 Ver 00 - January 2012 27
Chapter 5 Electrical installation
Chapter
5
Electrical installation
Notes • The two outputs are protected against short-circuits to 24V DC and 0V. When the
light path is clear, the signal level on the outputs is HIGH DC (at potential), when
the light path is interrupted or there is a device fault the outputs are LOW DC.
• The SC300 safety camera system meets the interference suppression requirements
(EMC) for industrial use (interference suppression class A). When used in residential
areas it can cause radio interferences.
• To achieve full electromagnetic compatibility (EMC), functional earth (FE) must be
connected.
OSSD1 OSSD2 OSSD1 OSSD2
Switch the entire machine/system off line.
The machine/system could unintentionally start up while you
are connecting the devices.
Ensure that the entire machine/system is disconnected during
the electrical installation.
Connect OSSD1 and OSSD2 separately.
You are not allowed to connect OSSD1 and OSSD2 together,
otherwise signal safety will not be ensured.
Ensure that the machine controller processes the two signals
separately.
Contactors connected in series must be positively guided and
monitored (see “External device monitoring (EDM)” on
page 42).
Only connect the OSSDs to a single subsequent switching
element.
Each output signal switching device (OSSD) is only allowed to
be connected to one switching element (e.g. relay or
contactor). If several switching elements are required, then
you must choose a suitable form of contact duplication.
Prevent the occurrence of a potential difference between the
loads and the protective device.
If you connect loads to the OSSDs that are not reverse polarity
protected, then you must connect the 0V connections for
these loads and the related protective device separately, one
after the other, to the same 0V terminal strip. Only then is it
ensured that in the case of a fault, it is not possible for a
potential difference to form between the 0V connections for
the loads and the related protective device.
ATTENTION