2-Wire Namur > 2.2 Ma/ < 1.0 Ma (Electronic Insert Fel68) - Endress+Hauser Liquiphant FTL63 Operating Instructions Manual

Liquiphant FTL63
Endress+Hauser
Behavior of switch output and signaling
MAX
MIN
 28 Switching behavior and signaling, electronic insert FEL67
MAX DIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
RD LED red for alarm
YE LED yellow, switch status
GN LED green, operational status, device on
The switches for MAX/MIN on the electronic insert and the FTL325P switching unit
must be set according to the application. Only then is it possible to perform the
functional test correctly.
6.3.6 2-wire NAMUR > 2.2 mA/ < 1.0 mA (electronic insert FEL68)
• To connect to isolating amplifiers according to NAMUR (IEC 60947-5-6), e.g. Nivotester
FTL325N from Endress+Hauser
• To connect to isolating amplifiers of third-party suppliers according to NAMUR
(IEC 60947-5-6), a permanent power supply for the electronic insert FEL68 must be
ensured.
• Signal transmission H-L edge 2.2 to 3.8 mA/ 0.4 to 1.0 mA according to NAMUR
(IEC 60947-5-6) on two-wire cabling
• Functional testing without level change. A functional test can be performed on the
device using the test button on the electronic insert or using the test magnet (can be
ordered as an option) with the housing closed.
The functional test can also be triggered by interrupting the supply voltage or activated
directly from the Nivotester FTL325N.
Supply voltage
U = 8.2 V ±20 %
DC
The device must be powered by a voltage supply categorized as "CLASS 2" or "SELV".
Comply with the following according to IEC/EN61010-1: provide a suitable circuit
breaker for the device.
Power consumption
NAMUR IEC 60947-5-6
< 6 mW with I < 1 mA; < 38 mW with I = 3.5 mA
RD YE GN
150 Hz
L+ 2
50 Hz
L+ 2
50 Hz
L+ 2
150 Hz
L+ 2
0 Hz
L+ 2
Electrical connection
1 L-
1 L-
1 L-
1 L-
1 L-
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