Pfm Output (Electronic Insert Fel67) - Endress+Hauser Liquiphant FTL51B Operating Instructions Manual

Electrical connection
28
6.2.5

PFM output (electronic insert FEL67)

• For connection to Endress+Hauser Nivotester switching units FTL325P and FTL375P
• PFM signal transmission; current pulses are superimposed on the power supply along
the two-wire cabling
•
• Functional testing without level change:
• Functional testing of the entire device can be performed using the test button on the
electronic insert.
• The functional test can also be triggered by interrupting the supply voltage or activated
directly from the FTL325P switching unit.
•
Supply voltage
9.5 to 12.5 V
DC
In accordance with IEC/EN61010 a separate circuit breaker must be provided for the
device.
Power consumption
< 150 mW
Output signal status
• OK status: 150 Hz in the MAX mode, 50 Hz in the MIN mode
• Demand mode: 50 Hz in the MAX mode, 150 Hz in the MIN mode
• Alarm: 0 Hz in the MAX mode, 0 Hz in the MIN mode
Liquiphant FTL51B
Endress+Hauser