Operating Instructions Chapter 6
C4000 Standard/Advanced
8009861/WA65/2012-06-12 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 51
Subject to change without notice
Electrical installation
6 Electrical installation
Switch the entire machine/system off line!
The machine/system could inadvertently start up while you are connecting the devices.
Ensure that the entire machine/system is disconnected during the electrical
i
nstallation.
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 section 6.6
“External device monitoring (EDM)” on page 57).
Prevent the formation of a potential difference between the load and the protective
device!
If you connect loads that are not reverse-polarity protected to the OSSDs or the safety
outputs, you must connect the 0 V connections of these loads and those of the
corresponding protective device individually and directly to the same 0 V terminal strip.
This is the only way to ensure that, in the event of a defect, there can be no potential
difference between the 0 V connections of the loads and those of the corresponding
protective device.
WARNING
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