Endress+Hauser Liquiphant FTL31 - 6.1.2 2-Wire AC;DC Connection Overview

Liquiphant FTL31
24 Endress+Hauser
Operability
LED display
A
B
1
2
3
4
12
3
2
3
1
2
3
1
A0016856
A M12 connector, (cable without graphic)
B Valve plug
Item Function Description
1
Green LED (gn)
Lit
Device is operational
2
Yellow LED (ye)
Lit
M12 connector
Indicates the sensor state: tuning fork is covered by liquid
Valve plug / cable
Indicates the switching state:
• MAX operating mode (overfill prevention): sensor is not covered by liquid
• MIN operating mode (dry running protection): the sensor is covered by liquid
3
Red LED (rd)
flashing
Lit
Warning/maintenance required: error can be rectified, e.g. incorrect wiring
Fault/device failure: error cannot be rectified, e.g. electronic error
Function test with
test magnet
To perform a function test, hold the test magnet against the marking on the nameplate (for at least
2 seconds). This inverts the current switching status and the yellow LED changes state. When the
magnet is removed, the switching status valid at that time is adopted.
TEST
N
Ser. no.:
Order code:
Ext. ord. cd.:
A0020960
 17 Test magnet and marking
The test magnet is not included in the delivery and can be ordered as an optional accessory
(→  28).