User guide

PSEN op4B Series Operating Manual

8 REGULAR CHECKS AND MAINTENANCE

Qualified personnel must carry out the following checks regularly.

Ensure that:

• The “SAFE/BREAK” LED is constantly red when you pass the test

rod from top to bottom along the length of the whole sensing area,

at any distance from either unit.

• The safety light curtain switches to an OFF state when the

test/reset button is operated (“SAFE/BREAK” LED lights up red -

OSSD outputs open - monitored machine switches to a safe

condition).

• The reaction time at a machine stop, incl. the reaction time of the

safety light curtain and the machine overrun time, is within the

limits defined through the calculation of the safety distance (see

Chapter 2 “Installation”).

• The minimum safety distance between the danger zone and the

protected field is in accordance with the details stated in Chapter 2

“Installation”.

• Nobody can access and remain in the danger zone between the

safety light curtains and the hazardous machine parts.

• The danger zone cannot be accessed from any unprotected area.

• There is no visible damage to the safety light curtain and/or the

external electrical connections.

We recommend a yearly inspection.