Liquiphant S FTL70, FTL71
6
Electronic insert FEL51 (AC)
Power supply
Supply voltage: 19 to 253 V AC
Power consumption: < 0.83 W
Residual current consumption: < 3.8 mA
Short-circuit protection
Overvoltage protection FEL51: 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 (10 mA) or
> 0.5 VA at 24 V (20 mA)
• Relays with a lower holding power/rated power can be operated by means of an RC module connected in
parallel.
• For relays with a maximum holding power/rated power < 89 VA at 253 V or < 8.4 VA at 24 V
• Voltage drop across FEL51 max. 12V
• 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-energize 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 => MVT291278).
• When selecting the relay, pay attention to the
holding power/ rated power
/ rated power
(see "Connectable load")
L00-FTL5xxxx-04-05-xx-en-007
L1
U~ max. 253 V AC
50/60 Hz
N
N
PE
(Ground)
1 A
min.
19 V
1 2
FEL51
*
R
*
External load R
be connected
must
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.
1
2
1
2
1
2
1
2
I
L
I
L
< 3.8 mA
< 3.8 mA
