Pilz PSEN op4F/H-A Series Operating Manual page 29

OPERATING MANUAL
Manual start
The diagrams show the connection between the safety light curtains and the safety relay
PNOZ s3 in automatic start mode (Fig. 20) and monitored manual start mode (Fig 21).
• Avoid using varistors, RC circuits or LEDs in parallel to the relay inputs or in series
connection to the OSSD outputs.
• The safety contacts of OSSD1 and OSSD2 may not be connected in series or in
parallel, but must be used separately (Fig. 22).
• Should one of these configurations be used by mistake, the device switches to an
output error condition (see Chapter 8.).
• Connect both OSSDs outputs individually to the safety relay. Other configurations have
a negative effect on the safety of the system and are not permitted.
Fig. 22 – Correct OSSD signal load connection
Fig. 24 – Incorrect OSSD signal load connection
1003067-EN-04
Fig. 21 – Connection to safety relay – manual start
YES
NO
(II)
PSEN op4F/H-A series
Fig. 23 – Incorrect OSSD signal load
connection (I)
Fig. 25 – Incorrect OSSD signal load
connection (III)
NO
NO
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