BLG 4A
Safety Light Curtain
Maintenance and Care
6
18
english
Series BLG 4A light curtains require no special maintenance.
The following points should be checked by technical personnel on a regular basis (see also
“Testing” on page 11). The frequency of the inspection depends on the specific application
and on the conditions under which the light curtain is being operated.
►
Does the ESPE remain locked (
) while the beams are being broken by an appropriate
test rod over the entire safety field area (as per the diagram in Figure 7 on page 12)?
►
Is the ESPE correctly aligned? Lightly pressing on the edge of the product in both directions
should not cause the red LED to come on
.
►
Does the response time for a machine stop, including the response time of the ESPE and the
run-on time of the machine, fall below the limits defined based on the calculation of the safety
distance (see operating manual "Installation requirements“)?
►
Does the safety distance between the hazardous parts and the BLG 4A protection field
correspond to the figures in "Installation requirements" of the operating manual?
►
Is it ensured that no person can enter the area between the ESPE and the hazardous
machine function and remain there?
►
Is it ensured that access to the hazardous areas of the machine is not possible from any
unprotected side?
►
Do the ESPE and/or the external electrical connections show any visible evidence of
damage?
►
To prevent reduced range, regularly clean the front surfaces of the lenses.
NOTICE
Use of unsuitable cleaning procedures and products prohibited
Unsuitable cleaning procedures and cleaning agents can cause the front surfaces of
the lenses to dull and damage plastic surfaces or painted parts.
►
To clean the front surfaces of the lenses use only water and a damp cotton cloth.
►
To clean the plastic surfaces and painted parts of the light curtain, do
not
use the following
materials:
– Alcohol and solvents
– Wool cloths or synthetic materials
– Paper or other abrasive material
For BLG 4A-…-014/030-…
The fuses used in the unit are not self-resetting.
For BLG 4A-…-B…-…
The fuses used in the unit are self-resetting.
In case of a short circuit that results in these fuses tripping, turn off the power and wait for
approx. 20 seconds so that the fuses can resume their normal function.
Faults that cause voltage drop-outs in the supply voltage can cause the outputs to momentarily
open, which does not however affect safe operation of the light curtain.
6.1 Regular
inspections
6.2 Cleaning front
surfaces
6.3 Fuses
No. 940113-726 EN · 00.000000 · F18; Subject to modification.
