Endress+Hauser Liquiphant FTL41 Brief Operating Instructions page 22

Electrical connection
Behavior of the switch output and signaling
 19 FEL44 switching behavior, signaling LED
MAX DIP switch for setting the MAX safety
MIN DIP switch for setting the MIN safety
RD LED red for alarm
YE LED yellow, switch status
GN LED green, operational status, device on
5.4.3 2-wire NAMUR > 2.2 mA/< 1.0 mA (electronic insert FEL48)
• 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
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
P < 50 mW
22
RD
MAX
MIN
YE GN
3 4 5
3 4 5
3 4 5
3 4 5
3 4 5
Liquiphant FTL41
6 7 8
6 7 8
6 7 8
6 7 8
6 7 8
Endress+Hauser
A0033513