Safety
Leuze electronic
MLD 300, MLD 500
8
Table 2.1:
Models and safety-related parameters for the MLD 300 and MLD 500 series
• The safety sensor protects persons at access points or at hazard locations of machines and plants.
• The safety sensor detects persons only when they enter the danger zone but cannot tell whether
there are any persons inside the danger zone. For this reason, a start/restart interlock in the safety
chain is essential.
• The construction of the safety sensor must not be altered. When manipulating the safety sensor, the
protective function is no longer guaranteed. Manipulating the safety sensor also voids all warranty
claims against the manufacturer of the safety sensor.
• The safety sensor must be tested regularly by competent persons see chapter 2.2 „Competent
persons“.
• The safety sensor must be exchanged after a maximum of 20 years. Repairs or the exchange of
parts subject to wear and tear do not extend the service life.
2.1.2 Using the laser alignment aid
The optional internal laser alignment aid is available for transmitter-receiver systems.
Laser alignment aids must only be switched on for the purpose of alignment or testing the alignment of
transmitters, receivers and Deflecting Mirror Columns.
Do not switch on the laser if persons are present in the laser path.
Inform persons in the vicinity before embarking on alignment work
with lasers.
Variant
MLD 312 (for external
testing)
MLD 300
MLD 500
Type in accordance with
EN IEC 61496-1, -2
Type 2
Type 2
Type 4
SIL in accordance with IEC 61508
SIL 2
SIL 3
SILCL in accordance with
EN IEC 62061
-
SILCL 2
SILCL 3
Performance Level (PL) in accor
-
dance with EN ISO 13849-1
up to PL d
a)
PL d
PL e
Category in accordance with
EN ISO 13849-1
category 2
category 3
category 4
Probability of a dangerous failure
per hour
PFH
d
=1.2 x 10
-
8
b)
Leuze electronic
safety monitoring
device
PFH
d
=1.2 x 10
-8
PFH
d
=6.6 x 10
-9
c)
MTTF
d
204 years
a) with a respective safety monitoring device (e.g., Leuze electronic MSI-T), with DC
avg
³
medium
b) during an external test with DC > 90 %, e.g., with a MSI-T
c) or 6.0 x 10E-9 for MLD/AS-i
WARNING
The laser light source corresponds to laser class 2 according to EN 60825-1. Extended looking into the
beam path may damage the eye's retina.
Never look directly into the laser beam or into the direction of reflected beams.
WARNING
Adjustment work with lasers must be carried out by competent and instructed persons only.
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: [email protected]
