PSEN OP 4F/H-SERIE BEDIENUNGSANLEITUNG
9 REGULAR CHECKS AND MAINTENANCE
9.1 Regular checks
Check the following once a day
• The light curtain is in a safe state (OSSDs off).
− The beams are interrupted across the whole area of the protected field using a test object
(test rod) (TP-14 or TP-30) with an appropriate resolution, in accordance with the following
diagram.
• Is the light curtain aligned correctly?
− Press gently on the side of the product in both directions. The red LED must not light duri
ng
t
his process.
• Activate the TEST function on the TX side.
− The OSSD outputs are opened (red LED, OSSD on the RX side, ON and stop of the
controlled machine).
• The response time to the status of the machine STOP, including the response time of the light
curtain and machine, is within the limit values defined for calculating the safety distance (se
e
C
hapter 2.2).
• The safety distance between the danger zones and the light curtain complies with the details
specified in Chapter 2.2.
• Access and exposure of persons between the light curtain and hazardous machine components
is prevented.
• It is impossible to access the machine’s danger zones from an unprotected side.
• In order to guarantee that the light curtain remains in NORMAL FUNCTION MODE for at least
10-15 minutes and, after positioning the specific test object in the protected field, stays in a
SAFE STATE for the same time span, there must be no interference from external light sources.
• Check that all additional functions comply by activating them several times under different
operating conditions.
9.2 Maintenance
The safety light curtain in the PSEN op4F/H-A series does not require any special
maintenance.
The front optical protective surfaces should be cleaned regularly to prevent any reduction in
the operating range.
Use moist cotton cloths. Do not apply excessive pressure or the surfaces may become
tarnished.
T
he following materials should not be used to clean plastic surfaces or paintwork on the light
curtain:
− Alcohol and solvents;
− Woollen cloths or synthetic materials;
− Paper or other abrasive materials.
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