Endress+Hauser Liquiphant FTL33 Operating Instructions Manual page 21

Liquiphant FTL33
Maximum safety
Terminal assignment
2 1
3 4
K
L–
Wire colors for M12 plug:
• 1 = BN (brown)
• 2 = WT (white)
• 3 = BU (blue)
• 4 = BK (black)
Symbols Description
Yellow LED (ye) lit
Yellow LED (ye) not lit
K External load
Minimum safety
Terminal assignment
2 1
3 4
K
L–
Wire colors for M12 plug:
• 1 = BN (brown)
• 2 = WT (white)
• 3 = BU (blue)
• 4 = BK (black)
Symbols Description
Yellow LED (ye) lit
Yellow LED (ye) not lit
K External load
Function monitoring with M12 plug
Using a two-channel analysis, function monitoring of the sensor can be implemented in
addition to level monitoring, e.g. per relay switch, PLC, AS-i Bus I/O module.
Endress+Hauser
0.5A
L+
0.5A
L+
MAX output
1 2
1
2
MIN output
1 1 4
1 4
Electrical connection
Yellow LED (ye)
Yellow LED (ye)
21