Device description
Leuze electronic MLC 530 14
1 LED1, red/green
2 LED2, yellow
3LED3, blue
4 OSSD icon
5 RES icon
6 Blanking/muting icon
7 7-segment display
Figure 3.4: Indicators on the MLC 530 receiver
Table 3.3: Meaning of the LEDs
LED Color State Description
1 Red/green OFF Device switched off
red OSSD off
Red slowly flashing
(approx. 1 Hz)
External fault
Red flashing fast
(approx. 10 Hz)
Internal fault
Green slowly flashing
(approx. 1 Hz)
OSSD on, weak signal
green OSSD on
2 yellow OFF
• RES deactivated
• or RES activated and enabled
• or RES blocked and protective field inter-
rupted
ON RES activated and blocked but ready to be
unlocked - protective field free and linked sensor
is enabled if applicable
Flashing Upstream safety circuit opened
Flashing (1x or 2x) Changeover of the upstream control circuit
3 Blue OFF No special function (blanking, muting, …) active
ON Protective field parameter (blanking) correctly
taught
Slowly flashing Muting active
Short flashing
• Teaching of protective field parameters
• or muting restart necessary
• or muting override active