Endress+Hauser FTL51B Specifications
TI01403F/00/EN/02.19
71441084
2019-06-28
Products
Solutions Services
Technical Information
Liquiphant FTL51B
Vibronic
Limit switch for liquids
Application
• Point level switch for minimum or maximum detection in tanks, vessels and pipes
with all kinds of liquids, even in hazardous areas
• Process temperature range: –50 to +150 °C (–58 to +302 °F)
• Pressures up to 100 bar (1 450 psi)
• Viscosities up to 10 000 mPa⋅s
• Ideal substitute for float switches, as reliable function is not affected by flow,
turbulence, bubbles, foam, vibration, solids content or buildup.
• Extension pipe up to 6 m (20 ft)
Advantages
• Approved for safety systems with functional safety requirements up to SIL2/SIL3
in accordance with IEC 61508
• Quick and cost-effective commissioning, as no adjustment required
• Design in accordance with ASME B31.3 and CRN approval
• No mechanically moving parts: no maintenance, no wear, and a long operating life
• Functional safety: monitoring of oscillation frequency of tuning fork
• RFID TAG - easy measuring point identification and easier data access
• Functional testing by means of test button on electronic insert
• Heartbeat Technology via free iOS/Android SmartBlue app
• Measuring device with Bluetooth® wireless technology
Table of contents
Liquiphant FTL51B
About this document ........................ 4
Symbols ................................... 4
Function and system design ................... 5
point level detection ........................... 5
Measuring principle ........................... 5
Measuring system ............................ 5
Dependability ............................... 5
Input ..................................... 6
Measured variable ............................ 6
Measuring range ............................. 6
Output ................................... 6
Output and input variants ........................ 6
Output signal ................................ 6
Ex connection data ............................ 7
2-wire AC (electronic insert FEL61) ............. 8
Supply voltage ............................... 8
Power consumption ............................ 8
Current consumption ........................... 8
Power output and load current ..................... 8
Behavior of output signal ........................ 8
Terminal assignment ........................... 8
Behavior of switch output and signaling .............. 9
PFM output (electronic insert FEL67) ........... 14
Supply voltage .............................. 14
Power consumption ........................... 14
Behavior of output signal ....................... 14
Terminal assignment .......................... 15
Connection cable ............................. 15
Behavior of switch output and signaling ............. 16
2-wire NAMUR > 2.2 mA/< 1.0 mA (electronic
insert FEL68) ............................. 16
Supply voltage .............................. 16
Power consumption ........................... 16
Behavior of output signal ....................... 16
Terminal assignment .......................... 17
Behavior of switch output and signaling ............. 17
Bluetooth module and Heartbeat Technology .... 18
Bluetooth module VU121 (optional) ................ 18
Heartbeat Technology ......................... 18
Functions .................................. 18
Technical data .............................. 19
LED module VU120 (optional) ................ 19
Supply voltage .............................. 19
Power consumption ........................... 19
Current consumption .......................... 19
3-wire DC-PNP (electronic insert FEL62) ......... 9
Supply voltage ............................... 9
Power consumption ............................ 9
Current consumption ........................... 9
Load current ................................. 9
Capacitance load .............................. 9
Residual current .............................. 9
Residual voltage .............................. 9
Behavior of output signal ....................... 10
Terminal assignment .......................... 10
Behavior of switch output and signaling ............. 10
Universal current connection with relay output
(electronic insert FEL64) .................... 11
Supply voltage .............................. 11
Power consumption ........................... 11
Connectable load ............................. 11
Behavior of output signal ....................... 11
Terminal assignment .......................... 12
Behavior of switch output and signaling ............. 12
DC connection, relay output (electronic insert
FEL64 DC) ................................ 13
Supply voltage .............................. 13
Power consumption ........................... 13
Connectable load ............................. 13
Behavior of output signal ....................... 13
Terminal assignment .......................... 13
Behavior of switch output and signaling ............. 14
Performance characteristics .................. 20
Reference operating conditions ................... 20
Maximum measured error ...................... 20
Hysteresis ................................. 20
Non-repeatability ............................ 20
Influence of the process temperature ............... 20
Influence of the process pressure .................. 20
Influence of the density of the process medium (at room
temperature and normal pressure) ................. 21
Installation ............................... 22
Mounting location, orientation ................... 22
Installation instructions ........................ 22
Taking marking into account ..................... 24
Sliding sleeves .............................. 24
Aligning the cable entry ........................ 24
Special mounting instructions .................... 25
Environment .............................. 26
Ambient temperature range ..................... 26
Storage temperature .......................... 27
Humidity .................................. 27
Operating altitude ............................ 27
Climate class ............................... 27
Degree of protection .......................... 27
Vibration resistance .......................... 27
Shock resistance ............................. 27
Mechanical load ............................. 27
Electromagnetic compatibility .................... 27
2 Endress+Hauser
Liquiphant FTL51B
Process .................................. 28
Process temperature range ...................... 28
Thermal shock .............................. 28
Process pressure range ........................ 28
Test pressure ............................... 28
Density ................................... 29
Pressure tightness ........................... 29
Mechanical construction .................... 30
Design, dimensions ........................... 30
Dimensions ................................ 31
Weight ................................... 38
Materials ................................. 39
Surface roughness ........................... 39
Operability ............................... 40
Operating concept ............................ 40
Elements on the electronic insert .................. 40
Terminals ................................. 40
Local operation ............................. 40
Local display ................................ 41
Remote interrogation ......................... 42
Diagnostic information ........................ 42
Certificates and approvals ................... 43
CE mark .................................. 43
RCM-Tick marking ............................ 43
Ex approval ................................ 43
Overfill protection ............................ 43
Functional safety ............................ 43
Marine approvals ............................ 44
Radio approval .............................. 44
CRN approval ............................... 44
Inspection certificates ......................... 44
Pressure Equipment Directive .................... 44
Process seal as per ANSI/ISA 12.27.01 .............. 44
China RoHS symbol ........................... 45
RoHS ..................................... 45
Additional certification ......................... 45
ASME B 31.3 ............................... 45
Ordering information ....................... 45
TAG ..................................... 45
Application packages ....................... 46
Heartbeat Technology ......................... 46
Accessories ............................... 46
Device-specific accessories ...................... 46
Supplementary documentation ............... 52
Special documentation ......................... 52
Supplementary device-dependent documentation ....... 52
Registered trademarks ...................... 52
Endress+Hauser 3
About this document
DANGER
WARNING
CAUTION
NOTICE
A
1.
-
.
Symbols Safety symbols
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in serious or
fatal injury.
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in serious or
fatal injury.
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in minor or
medium injury.
This symbol contains information on procedures and other facts which do not result in personal
injury.
Electrical symbols
Ground connection
Grounded clamp, which is grounded via a grounding system.
Protective earth (PE)
Ground terminals, which must be grounded prior to establishing any other connections. The ground
terminals are located on the inside and outside of the device.
Liquiphant FTL51B
Symbols for certain types of information
Permitted
Procedures, processes or actions that are permitted.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information
Reference to documentation
Reference to another section
, 2., 3. Series of steps
Symbols in graphics
A, B, C ... View
1, 2, 3 ... Item numbers
Hazardous area
Safe area (non-hazardous area)
4 Endress+Hauser
Liquiphant FTL51B
A B
Function and system design
point level detection
Measuring principle
Measuring system
Maximum or minimum detection for liquids in tanks or pipes in all industries. Suitable for leakage
monitoring, dry-running protection, pump protection or overfill protection, for example .
Specific versions are suitable for use in hazardous areas.
The point level switch differentiates between the "covered" and "not covered" conditions.
Depending on the MIN (minimum detection) or MAX (maximum detection) modes, there are two
possibilities in each case: OK status and demand mode
OK status
• In MIN mode, the fork is covered, e. g. pump protection
• In MAX mode, the fork is not covered e. g. overfill protection
Demand mode
• In MIN mode, the fork is not covered e. g. pump protection
• In MAX mode, the fork is covered e. g. overfill protection
The sensor's tuning fork vibrates at its intrinsic frequency. As soon as the liquid covers the tuning
fork, the vibration resistance decreases. The change in frequency causes the point level switch to
switch.
1 Example of a measuring system
A Device for direct connection of a load
B Device for connection to a separate switching unit or PLC
Dependability Device-specific IT security
The device settings and the diagnostic data can be read out via Bluetooth. Device settings cannot be
changed via Bluetooth.
A0035308
Endress+Hauser 5
Input
Liquiphant FTL51B
Measured variable
Measuring range
Level (point level), MAX or MIN safety
Depends on the installation location and the pipe extension ordered
Maximum sensor length 6 m (20 ft)
Output
Output and input variants Electronic inserts
2-wire AC (FEL61)
• Two-wire AC version
• Switches the load directly into the power supply circuit via an electronic switch.
3-wire DC-PNP (FEL62)
• Three-wire DC version
• Switches the load via the transistor (PNP) and separate connection, e. g. in conjunction with
programmable logical controllers (PLC)
• Ambient temperature –60 °C (–76 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
Universal current connection, relay output (FEL64)
• Switches the loads via 2 potential-free changeover contacts
• Ambient temperature –60 °C (–76 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
Direct current connection, relay output (FEL64DC)
• Switches the load via 2 potential-free changeover contacts
• Ambient temperature –60 °C (–76 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
PFM output (FEL67)
• For separate switching device (Nivotester FTL325P, FTL375P)
• PFM signal transmission; current pulses are superimposed on the power supply along the two-wire
cabling
• Ambient temperature –52 °C (–62 °F), optionally available for order
The low-temperature electronic inserts are marked LT
2-wire NAMUR > 2.2 mA/< 1.0 mA (FEL68)
• For separate switching device, e. g. Nivotester FTL325N
• Signal transmission H-L edge 2.2 to 3.8/0.4 to 1.0 mA as per IEC 60917-5-6 (NAMUR) on two-
wire cable
• Ambient temperature –52 °C (–62 °F), optionally available for order
Low-temperature electronic inserts are marked LT.
2-wire density (FEL60D) for density measurement
Connection to Density Computer FML621
For more information, see the Technical Information for density measuring technology.
Output signal Switch output
Preset switching times can be ordered. The following ranges can be ordered for point level switches
without communication (AC two-wire, relays, DC-PNP, PFM, NAMUR):
• 0.5 seconds when the fork is covered and 1.0 seconds when it is uncovered (factory setting)
• 0.25 seconds when the fork is covered and 0.25 seconds when it is uncovered (fastest setting)
• 1.5 seconds when the fork is covered and 1.5 seconds when it is uncovered
• 5 seconds when the fork is covered and 5 seconds when it is uncovered
COM interface
For connecting to modules VU120 or VU121 (no modifying effect)
6 Endress+Hauser
Liquiphant FTL51B
Bluetooth® wireless technology (optional)
The device has a Bluetooth® wireless technology interface. Device data and diagnostic data can be
read out using the free "SmartBlue" app.
Ex connection data
See safety instructions (XA): All data relating to explosion protection are provided in separate Ex
documentation and are available from the Downloads Area of the Endress+Hauser-website. The Ex
documentation is supplied as standard with all Ex devices.
Endress+Hauser 7
Liquiphant FTL51B
!
>0,5
COM
NL1
1
2
MIN
MAX
>0,7
U 19...253 V AC
I max: 350 mA
~
~
1 A
L1 NPE
K
1 2
2-wire AC (electronic insert FEL61)
• Two-wire AC version
• Switches the load directly into the power supply circuit via an electronic switch; always connect in
series with a load.
• Functional testing without level change
A functional test can be performed on the device using the test button on the electronic insert.
Supply voltage
Power consumption
Current consumption
Power output and load current
Behavior of output signal
Terminal assignment
U = 19 to 253 V
AC
Residual voltage when switched through: maximum 12 V
Pay attention to the following as per IEC/EN61010-1: Provide a suitable circuit breaker for the
device, and limit the current to 1 A, e. g. by installing a 1 A fuse (slow-blow) in the line (not the
neutral wire) of the supply circuit.
P ≤ 2 VA
Residual current when blocked: I ≤ 3.8 mA
The red LED flashes in the event of an overload or short-circuit. Check for an overload or shortcircuit every 5 seconds. The test is deactivated after 60 seconds.
• Max 89 VA/253 V (350 mA); max 8.4 VA/24 V (350 mA)
• Min 2.5 VA/253 V (10 mA); min ≥ 0.5 VA/24 V (20 mA)
• With overload and short-circuit protection.
• OK status: load on (switched through)
• Demand mode: load off (blocked)
• Alarm: load off (blocked)
Always connect an external load. The electronic insert has integrated short-circuit protection.
A0036060
2 2-wire AC, electronic insert FEL61
8 Endress+Hauser
Liquiphant FTL51B
MAX
RD YE GN
MIN
K
K
K
K
K
(N)
(N)
(N)
(N)
(N)
I
L
I
L
<3.8 mA
<3.8 mA
<3.8 mA
2
2
2
2
2
1
1
1
1
1
L1
L1
L1
L1
L1
ΔU
ΔU
Behavior of switch output and signaling
A0031901
3 Behavior of switch output and signaling, electronic insert FEL61
MAXDIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
RD LED, red, for warning or alarm
YE LED, yellow, switch status
GN LED, green, operational status, device on
ILLoad current switched through
Supply voltage
Power consumption
Current consumption
Load current
Capacitance load
Residual current
Residual voltage
3-wire DC-PNP (electronic insert FEL62)
• Three-wire DC version
• Preferably in conjunction with programmable logic controllers (PLC), DI modules as per
EN 61131-2. Positive signal at switch output of electronics module (PNP)
• Functional testing without level change
A functional test can be performed on the device using the test button on the electronic insert or
using the test magnet with the housing closed.
WARNING
L
Failure to use the prescribed power unit.
Risk of fatal injury due to electric shock!
The FEL62 may only be powered by devices with safe galvanic isolation, as per IEC 61010-1.
‣
U =10 to 55 V
Pay attention to 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 line
(not the neutral wire) of the supply circuit.
P ≤ 0.5 W
I ≤ 10 mA (without load)
The red LED flashes in the event of an overload or short-circuit.
I ≤ 350 mA with overload and short-circuit protection
C ≤ 0.5 µF at 55 V, C ≤ 1.0 µF at 24 V
I < 100 µA (with transistor blocked)
U < 3 V (with transistor switched through)
DC
Endress+Hauser 9
Liquiphant FTL51B
!
U = 10...55 V DC
I max: 350 mA
1
3
L-L+
COM
MIN
MAX
>0,7
>0,5
1
3
0.5 A
L+ L-
I 350 mA
max
U 55 V
max
K
K
I
L
PE
4
3
1
2
1
3
4
M12
1 2 3
B
A
L+ L-
K
MAX
RD YE GN
MIN
K
K
K
(L–)
(L–)
(L–)
I
L
<100 µA
I
L
3
3
3
1
1
1
L+
L+
L+
ΔU
ΔU
K
(L–)
<100 µA
3
1
L+
(L–)
<100 µA
3
1
L+
K
Behavior of output signal
Terminal assignment
• OK status: switched through
• Demand mode: blocked
• Alarm: blocked
A0036061
4 3-wire DC-PNP, electronic insert FEL62
A Connection wiring with terminals
B Connection wiring with M12 connector in housing as per EN61131-2 standard
Behavior of switch output and signaling
5 Behavior of switch output and signaling, electronic insert FEL62
MAXDIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
10 Endress+Hauser
RD LED, red, for warning or alarm
YE LED, yellow, switch status
GN LED, green, operational status, device on
ILLoad current switched through
A0033508
Liquiphant FTL51B
Universal current connection with relay output (electronic insert FEL64)
• Switches the loads via 2 potential-free changeover contacts
• Two galvanically isolated change-over contacts (DPDT), both change-over contacts switch
simultaneously
• Functional testing without level change. A functional test can be performed on the device using
the test button on the electronic insert or using the test magnet with the housing closed.
WARNING
L
In the event of an error, the electronic insert can exceed the limit temperature for touchable
surfaces, resulting in a risk of burns.
Do not touch the electronics in the event of an error!
‣
Supply voltage
Power consumption
Connectable load
Behavior of output signal
U = 19 to 253 VAC/19 to 55 V
Pay attention to 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 line
(not the neutral wire) of the supply circuit.
P < 25 VA,< 1.3 W
Loads switched via 2 potential-free changeover contacts (DPDT)
• IAC ≤ 6 A (Ex de 4 A), U~ ≤ AC 253 V; P~ ≤ 1 500 VA, cos φ = 1, P~ ≤ 750 VA, cos φ > 0.7
• IDC ≤ 6 A (Ex de 4 A) to DC 30 V, I DC ≤ 0.2 A to 125 V
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 shortcircuit.
Both relay contacts switch simultaneously.
• OK status: relay energized
• Demand mode: relay de-energized
• Alarm: relay de-energized
DC
Endress+Hauser 11
Terminal assignment
L1 N
4
3 5
876
U = 19...55 V DC
U 19...253 V AC
~
~
!
0.5 A
1
2 2
L1
L+
NO NONC NCC CNL-PE
1 2 3 64 75 8
MIN
>0,7
MAX
>0,5
COM
3 54
3 54
6 87
6 87
3 54
33554
4
6 87
66887
7
MAX
RD YE GN
MIN
Liquiphant FTL51B
A0036062
6 Universal current connection with relay output, electronic insert FEL64
1 When bridged, the relay output works using NPN logic.
2 Connectable load
Behavior of switch output and signaling
A0033513
7 Behavior of switch output and signaling, electronic insert FEL64
MAXDIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
RD LED, red, for alarm
YE LED, yellow, switch status
GN LED, green, operational status, device on
12 Endress+Hauser
Liquiphant FTL51B
L1 N
4
3 5
876
U = 9...20 V DC
!
0.5 A
1
2 2
L1
L+
NO NONC NCC CNL-PE
1 2 3 64 75 8
MIN
>0,7
MAX
>0,5
COM
DC connection, relay output (electronic insert FEL64 DC)
• Switches the loads via 2 potential-free changeover contacts
• Two galvanically isolated change-over contacts (DPDT), both change-over contacts switch
simultaneously
• Functional testing without level change. Functional testing of the entire device can be performed
using the test button on the electronic insert or with the test magnet with the housing closed.
Supply voltage
Power consumption
Connectable load
Behavior of output signal
Terminal assignment
U = 9 to 20 V
DC
Pay attention to 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 power
circuit.
P < 1.0 W
Loads switched via 2 potential-free changeover contacts (DPDT)
• IAC ≤ 6 A (Ex de 4 A), U~ ≤ AC 253 V; P~ ≤ 1 500 VA, cos φ = 1, P~ ≤ 750 VA, cos φ > 0.7
• IDC ≤ 6 A (Ex de 4 A) to DC 30 V, I DC ≤ 0.2 A to 125 V
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 shortcircuit.
• OK status: relay energized
• Demand mode: relay de-energized
• Alarm: relay de-energized
Endress+Hauser 13
A0037685
8 DC connection with relay output, electronic insert FEL64 DC
1 When bridged, the relay output works using NPN logic.
2 Connectable load
Behavior of switch output
3 54
3 54
6 87
6 87
3 54
33554
4
6 87
66887
7
MAX
RD YE GN
MIN
and signaling
Liquiphant FTL51B
A0033513
9 Behavior of switch output and signaling, electronic insert FEL64 DC
MAXDIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
RD LED, red, for alarm
YE LED, yellow, switch status
GN LED, green, operational status, device on
Supply voltage
Power consumption
Behavior of output signal
PFM output (electronic insert FEL67)
• For connecting to the Nivotester FTL325P and FTL375P switching units from Endress+Hauser
• PFM signal transmission; pulse frequency modulation, superimposed on the power supply along
the two-wire cabling
• Functional testing without level change:
• A functional test can be performed on the device using the test button on the electronic insert.
• The functional test can also be prompted by disconnecting the supply voltage or triggered
directly by the Nivotester FTL325P and FTL375P switching unit.
U = 9.5 to 12.5 V
Pay attention to the following as per IEC/EN61010-1: Provide a suitable circuit breaker for the
device.
P ≤ 150 mW with Nivotester FTL325P or FTL375P
• OK status: MAX mode 150 Hz, MIN mode 50 Hz
• Demand mode: MAX mode 50 Hz, MIN mode 150 Hz
• Alarm: MAX/MIN mode 0 Hz
DC
14 Endress+Hauser
Liquiphant FTL51B
>0,5
COM
MIN
MAX
>0,7
– +
1
2
L- L+
!
!
7
33
37
d4
z4
8
34
38
d2
z2
z6 d6
.
-
1 2
Terminal assignment
Connection cable
A0036065
10 PFM output, electronic insert FEL67
7/ 8: Nivotester FTL325P 1 CH, FTL325P 3 CH input 1
33/ 34: Nivotester FTL325P 3 CH input 2
37/ 38: NivotesterFTL325P 3 CH input 3
d4/ d2: Nivotester FTL375P input 1
z4/ z2: Nivotester FTL375P input 2
z6/ d6: Nivotester FTL375P input 3
• Maximum cable resistance: 25 Ω per core
• Maximum cable capacitance: < 100 nF
• Maximum cable length: 1 000 m (3 281 ft)
Endress+Hauser 15
Behavior of switch output
MAX
RD YE GN
MIN
1
1
1
1
1
2
2
2
2
2
L+
L+
L+
L+
L+
150 Hz
50 Hz
50 Hz
150 Hz
0 Hz
L-
L-
L-
L-
L-
and signaling
Liquiphant FTL51B
A0037696
11 Switching behaviour and signaling, electronic insert FEL67
MAXDIP switch for setting MAX safety mode
MIN DIP switch for setting MIN safety mode
RD LED, red, for alarm
YE LED, yellow, switch status
GN LED, green, operational status, device on
Supply voltage
Power consumption
Behavior of output signal
The MAX/MIN switch must be set in accordance with the application. Only then is it possible to
perform the functional test correctly.
2-wire NAMUR > 2.2 mA/< 1.0 mA (electronic insert FEL68)
• For connecting to isolating amplifier as per NAMUR (IEC 60947-5-6), e. g. the Nivotester
FTL325N from Endress+Hauser
• Signal transmission H-L edge 2.2 to 3.8 mA/ 0.4 to 3.8 mA as per IEC 60947-5-6 (NAMUR) on
two-wire cable
• Functional testing without level change. A functional test can be performed on the device using
the test button on the electronic insert or using the test magnet with the housing closed.
The functional test can also be triggered by interrupting the supply voltage or activated directly
from the Nivotester FTL325N.
U = 8.2 V
NAMUR IEC 60947-5-6
• OK status: output current 2.2 to 3.8 mA
• Demand mode: output current 0.4 to 1.0 mA
• Alarm: output current 0.4 to 1.0 mA
DC
Pay attention to the following as per IEC/EN61010-1: Provide a suitable circuit breaker for the
device.
16 Endress+Hauser
Loading...