Level Switch LFFS
Special Features
Wetted parts in acid-proof,
stainless steel and PEEK
Compact, food compatible,
hygienic design
Hygienic connections conform
to 3-A standards, FDA demands and EHEDG guidelines
Precise switching point without
calibration
Process temperature
-40...200 °C
Measures media with
DK-values >1.5
(DK = Dielectrical Constant)
Not influenced by foam
LED switch indicator
Maintenance free
Suitable for media separation
measurement
Configurable by
FlexProgrammer 9701
ATEX approval for gas and
dust
WHG approval (leakage and
overfill)
Technical Data
Sensor
Approvals/conformities
Hygienic: G1/2, 3-A/DN38 or sliding
connection
Adapters
Refer to page 5
Insulating material
PEEK Natura
Mechanical data
Housing
Stainless Steel, W1.4301/AISI 304
Process connection
Stainless Steel, W1.4404/AISI 316 L
Amb. temperature
-40...85 °C
Process temperature
Std. & 3-A/DN38
Sliding connection
< 1 hour, Tamb < 60 °C
Protection class
-40...115 °C (See curve 1)
-40...200 °C (See curve 1)
-40...140 °C
IP67 (IEC 529)
Media pressure
Standard G½ hygienic < 100 bar
(tested with water at 20°C) 3-A DN38
< 40 bar
Sliding connection
< 16 bar
Vibrations
IEC 60068-2-6, GL test2
Installation
Any position
Electrical connection
Cable gland M16
Plast or Nickel-plated brass
Plug M12
Nickel plated brass or stainless steel
AISI 304
Other electrical data
Power supply
12,5...36 VDC, 35 mA max.
Damping
0...10 sec.
Power-up time
Approvals/conformities
EN 1935/2004, EN 10/2011, EN
2023/2006, EN 50155 Railway, 3-A,
EHEDG, FDA, WHG (leakage and overfill)
UL listed, E36692
Disposal of product and packing
According to national laws or by returning to Baumer.
EMC data
Immunity
EN 61326
Emission
EN 61326
Ex data (ia)
Internal inductivity
Li <
– 10 μH
Internal capacity
Ci <
– 33 nF
Barrier data
U<
– 30 VDC ; I <
– 0.1 A ; P <
– 0.75 W
Approval Ex ia IIC T5, ATEX II 1G (See table 1)
Supply range
24...30 VDC
Temperature class
T1...T5: -40 < Tamb < 85 °C
Approval Ex tD A20 IP67 T100 °C, ATEX II 1D (See table 1)
Supply range
12,5...30 VDC
Temperature class
T100 °C: -40 < Tamb < 85 °C
Approval Ex nA II T5, ATEX II 3G (See table 1)
Supply range
12,5...30 VDC
Temperature class
T1...T5: -40 < Tamb < 85 °C
Output
Output (active)
Max. 50 mA, short-circuit and
high-temperature protected
<2 sec.
Output type
PNP, NPN or Digital output (Push-pull)
Hysteresis
± 1 mm
Output polarity
See drawing
Repeatability
± 1 mm
Active “Low”
Reaction time
0.1 sec. (100 mS)
NPN and Digital output
(-VDC +2.5V) ± 0.5V ; Rload 1 kOhm
Active “High”
PNP and Digital output
(VDC -2.5V) ± 0.5V ; Rload 1 kOhm
Off leak current
± 100 μA Max.
www.baumer.com
Data sheet
E21.04 LFFS-1_EN
Page 1 / 8
Design and specifications subject to change without notice
100...180 MHZ
Process connection
EN/2014-08-26
Radiated signal
Level Switch LFFS
Technical Data
Factory Settings
Output
PNP, NPN or Digital
Measure
DK value >1,5
Damping
0.1 sec.
Dimensional Drawings
[mm]
ø55
58
Safety chain
G1/2 Hygienic sliding nipple
M16 gland M12 plug
AF22
G1/2
44
19
Sliding
connection
length,
refer to
ordering
data
Washer ring kit, 2 items
Type no. 4401 8001
included
31.5
G1/2 Hygienic,
Sliding connection
3A/DN38 Hygienic connection
O-ring EPDM incl.
18
G1/2 Hygienic connection
EN/2014-08-26
Design and specifications subject to change without notice
Sliding connection load
www.baumer.com
Data sheet
E21.04 LFFS-1_EN
Page 2 / 8
Level Switch LFFS
Electrical Connection
Output
Teach-in
4
5
Sensor
M12 plug: Case
6
3
4
3
1
2
1 : Brown
2 : White
3 : Blue
4 : Black
1
2
+ or (-)
- or (+)
12,5...36 Vdc
M12plug
Electrical Installation
Normally Open
PLC
0 mA
Active High
50 mA
LED
+
+
-
12.5 ... 36 VDC
12.5 ... 36 VDC
-
-
NPN Output
50 mA max.
PNP Output
50 mA max.
+
12,5...36 VDC
Digital Output
50 mA max.
Normally Closed
PLC
50 mA
LED
-
+
12,5...36 VDC
-
PNP Output
50 mA max.
Active Low
+
12,5...36 VDC
12,5...36 VDC
Digital Output
50 mA max.
NPN Output
50 mA max.
Configuration
Accessories
Design and specifications subject to change without notice
0 mA
+
FlexProgrammer 9701
Red clip
Red clip
1
2
2
Black clip
Black clip
Note: Ambient
temperature
range 0...50°C
Note:
Ambient temperature
range 0...50°C
Disconnect the power
1
1 1
1
2
2 2
2
www.baumer.com
Disconnect the power
supply before connecting
supply before connecting
the FlexProgrammer
9701
the FlexProgrammer
9701
to
the
Level
Switch
LFFS
to the Level Switch LFFS
The FlexProgrammer 9701 is a dedicated tool to configure all
Baumer configurable Flex-products.
Type No. 9701-0001 comprises:
FlexProgrammer
Cables
CD with the FlexProgram software
EN/2014-08-26
1
Data sheet
E21.04 LFFS-1_EN
Page 3 / 8
Level Switch LFFS
The Sliding Connection (Figure 1)
External length of sliding connection
1)
Free external length of sliding connection see curve 1 below
1)
Insulation
2)
Insulation
2)
4)
Lumpy or sticky media
4)
Lumpy or sticky media
3)
The drawing shows how the sliding connection can be used for at
least 4 applications:
1) Mounted at the top of a tank to adjust to a maximum level.
2) Serving as a cooling neck in high media temperature applications.
3) Adjusted to place the sensor tip deeper inside the tank.
4) To reach in through insulation material.
It is essential that the max. ambience temperature for the electronics
is never exceeded. For ATEX approved products please refer to
table 1.
3) Curve 1:
Example, how to read
A 250 mm sliding connection is mounted in a tank with a total insert
length of 150 mm. Hence the external length of the sliding connection
will be 250 - 150 = 100 mm.
The media temperature will be max. 160 °C.
Read the x-axis at 100 mm an the y-axis at 160 °C and find that the
ambient temperature must be kept below 50 °C. In case the radiated
heat from the tank will cause a higher ambient temperature at the
housing efficient insulation of the tank must be established
The working conditions for the sliding connection in different media
temperatures and specified ambient temperatures can be found in
curve 1.
Media Temperature versus External Length of Sliding Connection (Curve 1)
Media Temperature
Kølehals for FLS
°C
Mikael Jensen / 2009-08-26
210
200
190
Tamb max. 40°C
180
Tamb max. 60°C
170
Design and specifications subject to change without notice
Tamb max. 75°C
160
150
140
130
120
110
100
Tamb max. 85°C
90
80
70
60
50
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
www.baumer.com
Data sheet
E21.04 LFFS-1_EN
EN/2014-08-26
External length of sliding connection (mm) See figure 1
NB: Std. + 3A/DN38 = 35 mm external length
Page 4 / 8
Level Switch LFFS
Accessories - Overview
R
R
74 - 03
74 - 03
LFFS-xx1
LFFS-xx2
LFFS-xx3/4
R
74 - 03
R
R
74 - 03
74 - 03
CAM 023
MAM02x-xxx
PM023
Welding part 3A/DN38
hygienic 81 26-916
LAM020-1
PM021
VAM 023
R
74 - 03
SAM020-051-1
PM022-x
Welding part 3A/DN38
hygienic 81 26-928
Design and specifications subject to change without notice
Please refer to the data sheet
“FlexBar Accessories” for these
accessories.
RAM020-1
PM025
RAM020-2
EN/2014-08-26
Please refer to the data sheet
“Accessories Universal” for these
accessories.
www.baumer.com
Data sheet
E21.04 LFFS-1_EN
Page 5 / 8
Level Switch LFFS
Ex ia G - Installation
Conditions for Ex-Certification (Table 1)
A Level Switch LFFS-1xx is Ex ia IIC T5, ATEX II 1G approved for application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing
guidelines for zone 0 with a barrier.
Ex tD - Installation
Connection Type Tamb °C
Std. & 3-A/DN38
Sliding 100 mm
A Level Switch LFFS-2xx is Ex tD A20 IP67 T100°C, ATEX II 1D
approved for application in hasardous areas in accordance with the
current EU-directives. The product must be installed in accordance
with prevailing guidelines for zone 20 without a barrier.
Sliding 250 mm
Ex ia G, Ex nA G - Installation
A Level Switch LFFS-3xx is Ex nA II T5, ATEX II 3G approved for
application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing
guidelines for zone 2 without a barrier.
Media Temp. max. °C
Note
-40...85
85
-40...60
95
{2}
-40...40
115
{2}
-40...85
85
-40...60
150
{2}
-40...40
175
{2}
-40...85
85
-40...60
195
{2}
-40...40
200
{2} {3}
Note {2}: Provided that the sensor tip at the instrument is the only part
in contact with the media.
Note {3}: Max. allowed media temperature.
Ex ia IIC T5, ATEX II 1G - Installation
Ex-data
Supply range
24...30 VDC
Temperature class
T1...T5: See table 1
Internal inductivity
Li < 10 μH
Internal capacity
Ci < 33 nF
Barrier data
U < 30 VDC ; I < 0.1 A ; P < 0.75 W
Safe area
Zone 0/1
PNP out
3
2
1
NO
NC
COM
+
C
22...120VDC or
90...253 VAC
Design and specifications subject to change without notice
A Level Switch LFFS-1xx is Ex ia IIC T5, ATEX II 1G approved for
application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing
guidelines for zone 0 with a barrier.
A certified Ex ia or isolation barrier with the maximum values
Umax = 30 VDC ; Imax = 0.1 A ; Pmax = 0.75 W must be used.
-
B
A
Level Switch LFFS
Isolating Module
PROFSI3-B25100-ALG-LS
EN/2014-08-26
Only
valid forthe
PNP
output
NB: For NB:
PNP
output
PROFSI3-B25100-ALG-LS
barrier must be used.
Isolating Module
PROFSI3-B25100-ALG-LS
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Data sheet
E21.04 LFFS-1_EN
Page 6 / 8
Level Switch LFFS
Ex tD A20 IP67 T100, ATEX II 1D - Installation
A Level Switch LFFS-2xx is Ex tD A20 IP67 T100°C, ATEX II 1D
approved for application in hasardous areas in accordance with the
current EU-directives. The product must be installed in accordance
with prevailing guidelines for zone 20 without a barrier.
Ex-data
Supply range
12,5...30 VDC, max 100 mA
Temperature class
T100: See table 1
Out
+
12,5...30 VDC
External lamp
Level Switch LFFS
Ex nA II T5, ATEX II 3G - Installation
A Level Switch LFFS-3xx is Ex nA II T5, ATEX II 3G approved for
application in hasardous areas in accordance with the current EUdirectives.
The product must be installed in accordance with prevailing
guidelines for zone 2 without a barrier.
Ex-data
Supply range
12,5...30 VDC, Max. 0.1A
Temperature class
T1...T5: See table 1
Remote Lamp
3
1
Design and specifications subject to change without notice
2
12,5..30 VDC
EN/2014-08-26
Level Switch LFFS
www.baumer.com
Data sheet
E21.04 LFFS-1_EN
Page 7 / 8
Level Switch LFFS
Ordering details
–
Model
Level Switch
5' digit
Safety
Standard
Ex ia IIC T5, ATEX II 1G (Gas) *
Ex tD A20 IP67 T100 °C, ATEX II 1D (Dust)
Ex nA II T5, ATEX II 3G
UL listed, E365692
6' digit
Electrical Connection
Plug, M12, Nickel plated brass
Cable gland, M16 brass
Cable gland, M16 Polyamid
Plug, M12, stainless
7' digit
Process Connection
G1/2, PEEK tip (1)
3-A/DN38 Hygienic connection (1)
G1/2, PEEK tip, sliding connection, 100 mm adjustable, incl. washer ring kit 4401 8001 (2)
G1/2, PEEK tip, sliding connection, 250 mm adjustable, incl. washer ring kit 4401 8001 (2)
8' digit
Configuration
No configuration
Configuring according to customer specification
* For PNP output the barrier module PFOFSI3-B25100-ALG-LS is required for funtional purposes.
LFFS
0
1
2
3
A
1
2
3
4
1
2
3
4
0
C
The washer ring kit for sliding connection, type no. 4401 8001
Can be ordered separately.
Baumer recommended to replace this kit if deformed.
3-A certificate / EHEDG certificate
The 3-A mark and the EHEDG certifcate is valid only when the product
is mounted in a 3-A marked or EHEDG certified counter part and installed
according to the installation manual. Use also a 3-A marked O-ring or
gasket if relevant. The 3-A marked products conforms to the 3-A Sanitary
Standard criteria. Materials and surfaces fulfill the FDA demands and are
certified by EHEDG.
(1)
Certified by EHEDG. Fulfills the FDA demand.
EPDM O-rings supplied with 3-A marked products are conform to
Sanitary Standard Class II (8% milk fat max.)
EPDM gaskets supplied with 3-A marked products are conform to
Sanitary Standard Class I (8% milk fat max.)
Refer to the 3-A marked counter parts in the data sheet “Accessories
Universal”.
Level Switch LFFS, example
(2)
Design and specifications subject to change without notice
PEEK Natura
EN/2014-08-26
Angle > 135 deg.
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Data sheet
E21.04 LFFS-1_EN
Page 8 / 8