Device description
Leuze electronic MLC 520 9
3 Device description
The safety sensors from the MLC500 series are active opto-electronic protective devices. They satisfy the
following standards:
MLC500
Type in accordance with ENIEC61496 4
Category in accordance with ENISO13849 4
Performance Level (PL) in accordance with ENISO13849‑1 e
Safety Integrity Level (SIL) in accordance with IEC61508 and SILCL in ac-
cordance with ENIEC62061
3
The safety sensor consists of a transmitter and a receiver (see chapter 3.1 "Device overview"). It is pro-
tected against overvoltage and overcurrent acc. to IEC60204-1 (safety class3). Its infrared beams are not
influenced by ambient light (e.g. welding sparks, warning lights).
3.1 Device overview
The series is characterized by three different receiver classes (Basic, Standard, Extended) with specific
features and properties (see table below).
Tab.3.1: Device models in the series with specific features and functions
Transmitter Receiver
Basic Standard Ex-
tended
MLC500
MLC501
MLC500/A MLC502 MLC510
MLC511
MLC510/A MLC520 MLC530
OSSDs (2x) ■ ■ ■
AS-i ■ ■
Transmission chan-
nel changeover
■ ■ ■ ■ ■
LED indicator ■ ■ ■ ■ ■ ■ ■
7‑segment display ■ ■
Automatic start/
restart
■ ■ ■
RES ■ ■
EDM ■
Linkage ■
Blanking ■
Muting ■
Scan mode ■
Range reduction ■
Test input ■
Protective field properties
The beam distance and the number of beams are dependent on the resolution and protective field height.
NOTICE
Depending on the resolution, the effective protective field height can be larger than the optically
active area of the safety sensor housed in yellow (see chapter 3.1 "Device overview" and see
chapter 14.1 "General specifications").