2-Wire Namur > 2.2 Ma/ < 1.0 Ma (Electronic Insert Fel68) - Endress+Hauser Liquiphant FTL64 Operating Instructions Manual

Liquiphant FTL64
Endress+Hauser
Behavior of switch output and signaling
MAX
MIN
 27 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.
6.2.6 2-wire NAMUR > 2.2 mA/ < 1.0 mA (electronic insert FEL68)
• For connection to the isolating switch repeater as per NAMUR (IEC 60947-5-6), e. g.
Nivotester FTL325N from Endress+Hauser
• Signal transmission H-L edge 2.2 to 3.8 mA/0.4 to 1.0 mA as per IEC 60947-5-6
(NAMUR) 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
DC
Observe the following as per IEC/EN61010-1: Provide a suitable circuit breaker for
the device.
Power consumption
NAMUR IEC 60947-5-6
Behavior of output signal
• OK status: output current 2.2 to 3.8 mA
• Demand mode: output current 0.4 to 1.0 mA
• Alarm: output current < 1.0 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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