sc2-2. Pepperl+Fuchs, sc2-2. Datasheet - Page 17

• Manufacturer Part Number: sc2-2.
• Description: Factory Automation
• Manufacturer: Pepperl+Fuchs

3.1
3.2
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 67 79 90 91 • Internet http://www.pepperl-fuchs.com
Figure 3.2: Adhesive label for marking the operating mode
Start/restart interlock (Restart)
If the protective beams are free and the start/restart interlock operating mode is activated, do not turn
the OSSDs and the OSSD-ON message on. The "Restart“ output is activated and the corresponding yellow
display LED lights up. After the "Restart“ (Start) button is pressed, the OSSDs and OSSD-ON message turn
on and the "Readiness for startup" output is turned off.
Relay monitor
With the OSSD switch outputs, the SC2 is able to perform safety-related monitoring of time-correlated ex-
ternal switching elements with the aid of feedback contacts. Normally closed contact of force-guided relays
should be used as feedback contacts. The feedback contacts of all downstream external switching ele-
ments should be wired in series. Series switching should be connected on the first side with the positive
voltage supply (Terminal 8) and on the other side with Terminal 7.
The feedback contacts of the external switching elements must ensure a reliable contact at a voltage of 20
V and a current of 6 mA. Resistance to peak voltages of 6 kV must be guaranteed between the feedback
contacts and other contacts that are at low voltage in accordance with the low voltage directive.
RI
RM
X
Operating Mode:
Copyright Pepperl+Fuchs, Printed in Germany
SC2-2 control unit
Operating modes
15