Endress+Hauser Liquiphant FTL51B - Page 22

Electrical connection Liquiphant FTL51B
22 Endress+Hauser
According to IEC 61010: the sum of the voltages of the relay outputs and power supply
≤ 300 V
Preferably use electronic insert FEL62 DC PNP for low DC current loads, e. g. connection to
a PLC.
Relay contact material: silver/nickel AgNi 90/10
When connecting a device with high inductance, fit a spark suppressor to protect the relay
contact. Depending on the connected load, a fine-wire fuse protects the relay contact in
the event of a short-circuit.
Both relay contacts switch simultaneously.
Behavior of output signal
• OK status: relay energized
• Demand mode: relay de-energized
• Alarm: relay de-energized
Terminal assignment
L1 N 4
3 5
8
7
6
U = 19...55 V DC
U 19...253 V AC
~
~
!
0.5 A
1
2 2
L1
L+
NO NONC NCC CN
L-
PE
1 2 3 64 75 8
MIN
>0,7
MAX
>0,5
COM
A0036062
 23 Universal current connection with relay output, electronic insert FEL64
1 When bridged, the relay output works using NPN logic.
2 Connectable load