Electrical connection Liquiphant FTL51B
32 Endress+Hauser
5.2.7 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
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