Operating Instructions Chapter 6
C4000 Select
8012247/RI61/2007-11-30 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 43
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.
The two outputs are protected against short-circuits to 24 V DC and 0 V. When the light
path is clear, the signal level on the outputs is HIGH DC (at potential), when the light
beams are interrupted or there is a device fault the outputs are LOW DC.
The safety light curtain C4000 Select meets the interference suppression requirements
(EMC) for industrial use (interference suppression class A). When used in residential
areas it can cause interference.
To ensure full electromagnetic compatibility (EMC), functional earth (FE) must be
connected.
The external voltage supply of the devices must be capable of buffering brief mains
voltage failures of 20 ms as specified in EN 60204@1. The power supply unit must
provide safe isolation (SELV/PELV). Suitable power supplies are available as
accessories from SICK (see section 12.11 “Accessories” on page 75).
System connections and extension connections in a cascaded system must be connect-
ed only if the system is off line.
WARNING
Notes
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