Liquiphant FTL51B Electrical connection
Endress+Hauser 21
Supply voltage
L
WARNING
Failure to use the prescribed power unit.
Risk of potentially life-threatening electric shock!
‣
The FEL62 may only be powered by devices with safe galvanic isolation, as per
IEC 61010-1.
U = 10 to 55 V
DC
Observe the following as per IEC/EN61010-1: Provide a suitable circuit breaker for the
device, and limit the current to 500 mA, e.g. by installing a 0.5 A fuse (slow-blow) in the
supply circuit.
Power consumption
P ≤ 0.5 W
Current consumption
I ≤ 10 mA (without load)
The red LED flashes in the event of an overload or short-circuit. Check for an overload or
short-circuit every 5 s.
Load current
I ≤ 350 mA with overload and short-circuit protection
Capacitance load
C ≤ 0.5 µF at 55 V, C ≤ 1.0 µF at 24 V
Residual current
I < 100 µA (for blocked transistor)
Residual voltage
U < 3 V (for switched through transistor)
Behavior of output signal
• OK status: switched through
• Demand mode: blocked
• Alarm: blocked