Endress+Hauser Liquiphant M FTL50H - Electronic Insert FEL51 (AC 2-wire); Output Signal and Connectable Load

Liquiphant M FTL50(H), FTL51(H)
6 Endress+Hauser
Electronic insert FEL51 (AC 2-wire)
Power supply Supply voltage: 19...253 V AC
Power consumption: < 0.83 W
Residual current consumption: < 3.8 mA
Short-circuit protection
FEM51 overvoltage protection: overvoltage category III
Electrical connection Two-wire AC connection
Output signal
Signal on alarm Output signal on power failure or in the event of damaged sensor: < 3.8 mA
Connectable load • For relays with a minimum holding power/rated power > 2.5 VA at 253 V AC (10 mA) or
> 0.5 VA at 24 V AC (20 mA)
• Relays with a lower holding power/rated power can be operated by means of an RC module connected
inparallel
• For relays with a maximum holding power/rated power < 89 VA at 253 V AC or < 8.4 VA at 24 V AC
• Voltage drop across FEL51 max. 12 V
• Residual current with blocked thyristor max. 3.8 mA
• Load switched directly into the power supply circuit via the thyristor.
Transient (40 ms) max. 1.5 A, max. 375 VA at 253 V or max. 36 VA at 24 V (not short-circuit proof)
Always connect in series with a load!
Check the following:
• The residual current in blocked state
(up to 3.8 mA)
• that for low voltage
– the voltage drop across the load is such
that the minimum terminal voltage at the
electronic insert (19 V) when blocked is
not undershot.
– the voltage drop across the electronics when
switched through is observed
(up to 12 V)
• that a relay cannot de-energise with holding
power below 3.8 mA.
If this is the case, a resistor should be
connected parallel to the relay.
(RC module available on request).
• When selecting the relay, pay attention to
the holding power/rated power
(See "Connectable load")
L00-FTL5xxxx-04-05-xx-en-007
L1
U~ max. 253 V AC
50/60 Hz
NNPE
(Ground)
1A
min.
19 V
12
FEL51
*
R
*
External load R
be connectedmust
Safety mode Level Output signal LEDs
green red
I
L
< 3.8 mA
L00-FTL2xxxx-07-05-
xx-xx-000
= load current
(switched through)
= residual current
(blocked)
= lit
= unlit
L00-FTL5xxxx-04-05-xx-xx-001
Max.
Min.
12
12
12
12
I
L
I
L
< 3.8 mA
< 3.8 mA