CET LFP41 is a period counter that can be used to measure rotational or linear speed, or count events over a set time period. It has several programmable parameters, including:
- Multiplier of impulses (1 to 9999)
- Divisor of impulses (1 to 999)
- Threshold mode (top threshold, bottom threshold, or top threshold with hysteresis)
- Excitation relay time (0 to 9.9 seconds)
- Disexcitation relay time (0 to 9.9 seconds)
- Automatic time reset (0 to 99 seconds)
- Display update time (0 to 4 seconds)
- Input type (slow or fast)
Some example use cases for the CET LFP41 include:
- Displaying the rotational speed of a shaft in revolutions per minute (RPM)
CET LFP41 is a period counter that can be used to measure rotational or linear speed, or count events over a set time period. It has several programmable parameters, including:
- Multiplier of impulses (1 to 9999)
- Divisor of impulses (1 to 999)
- Threshold mode (top threshold, bottom threshold, or top threshold with hysteresis)
- Excitation relay time (0 to 9.9 seconds)
- Disexcitation relay time (0 to 9.9 seconds)
- Automatic time reset (0 to 99 seconds)
- Display update time (0 to 4 seconds)
- Input type (slow or fast)
Some example use cases for the CET LFP41 include:
- Displaying the rotational speed of a shaft in revolutions per minute (RPM)
Type:
LFP41
VISUALIZED DIGITAL
PERIOD COUNTER WITH
ONE THRESHOLD
• Front push-botton panel made of polycarbonate
( antiscratch, oil and acid resistant )
• Protection grade IP 65
• Acces to parameters with software key: Time
Reset / Impuls Multiplier / Impuls Division / Display
Update Time / Excitation - Disexcitation Relay
Time / Input type / Threshold Mode
• Removable terminal connections
• DIN 48 x 96 execution
• Recessed assembly
• Special retaining brackets
• One threshold
• Histeresis
• Inpuls Multiplication factor
• Inpuls Division factor
• Functionnement Threshold Mode
• Excitation Relay Time
• Disexcitation Relay Time
• Automatic Time Reset
• Display Update Time
• Input ( Slow / Fast )
• POWER SUPPLY
• SUPPLAY TOLERANCE
• ABSORPTION
• OPERATION TEMPERATURE
• CLIMATIC CONDITIONS
• VISUALIZATION
• MULTIPLICATION FACTOR INPUT IMPULSES
• DIVISION FACTOR INPUT IMPULSES
• INPUTS TYPES
• COUNT FREQUENCY
• CUT - OFF FREQUENCY FOR
ELECTROMECHANIC INPUTS
• MINIMUM TIME FOR IMPULSES COUNT
• DISPLAY UPDATE TIME
• PRECISION
• AUXILIARY INPUT SUPPLAY
• OUTPUTS
• RESET RELAY
• PROGRAMMED DATA MEMORY
THE PERIOD COUNTER LFP41 IS
USED TO DISPLAY AND CONTROL,
THROUGH A RELAY CONTROLLED
THRESHOLD, A ROTATIONAL OR
LINEAR SPEED, OR A COUNTING
REFERRED TO A PRESELECTED TIME
BASE. ALL COMMON TYPES OF
CONTROLS ARE AVAILABLE, USING
THREE DIFFERENT PROGRAMMABLE
MODES.
MAIN FEATURES PROGRAMMABLE PARAMETERS
TECHNICAL FEATURES
: 24 - 110 - 220 Vac ( 50 / 60 Hz )
: + 10 % - 15 %
: 2 W - 3 VA
: - 5 ł˚ C + 55 ˚ C
: U.R. 95 % a 40 ˚ C ( without condensate )
: 4 figures
: from 1 to 9999
: from 1 to 999
: suitable for electromechanical and logical contacts NPN
and PNP
: up to 2 KHz ( upon request up to 10 KHz ) with Duty
Cycle = 50ł %
: about 20 Hz
: 0,25 mSec
: from 0 to 4 secs.
: 0,1 % ( worst case )
: 12 Vdc - 80 mA available on terminal
: 1 relais with operation contact- capacity of 5A - 250 Vac
: manual or automatic; programmable time from 0,1 to 99
sec.
: static ( no battery )
PAGE 1LFP41
L1 L2
LFP
frequency meter
PROG
ENT
RES
CET s.r.l.
FRONT - PUSH BUTTON PANEL
TRHESHOLD PROGRAMMING
PAGE 2 LFP41
PROG
RED
BLUE
YELLOW
YELLOW During programming mode cursor moves to the left.
During normal mode allows temporary visualization of the programmed data
During programming mode increases the flashing figures.
During normal mode visualizes the previously set data on totalizer.
Access and quit from the programming mode .
During programming mode confirms the data and passes to the next ( ENT ).
During normal mode resets the device ( RES ).
RES
ENT
CET s.r.l.
FOR THRESHOLD PROGRAMMING ACCESS PROCEED AS FOLLOW
PRESS PUSH BUTTON THE DISPLAY VISUALIZES:
QUIT PROGRAMMING
PROG
THE PROGRAMMABLE PARAMETERS ARE DIVIDED INTO TWO GROUPS PROTECTED BY A 4 FIGURES CODE
IN ORDER TO OBTAIN ACCESS TO PROGRAMMING, PROCEED AS FOLLOWS :
- PRESS PUSH - BUTTON FOR ABOUT 2 SECS: THE DISPLAY VISUALIZES :
QUIT PROGRAMMING
ENT
ENT
ENT
ENT
S1 threshold setting form 0000 to 9999..
Multiplier of impuls are programmable from 1 to 9999
Threshold functionnement Mode :
- 1 = Top threshold
- 2 = Bottom threshold
- 3 = Top threshold with Histeresis
ENT
It’s available in Mode 3 only..
GROUP 1 : ENTER CODE AND PRESS
ENTER CODE WITH AND
ENTPROG
RES
S2 threshold setting form 1 to 9999..
PROG
101 ENT
Divisor of impuls are programmable from 1 to 999
PROG
The activation threshold may be programmed in the following modes: Mode 1- bottom threshold. When
the displaied value is less than the programmed threshold, the relay is excited; when the displaied value is
equal to or greater than the programmed threshold, the relay is disexcitated. - Mode 2 - top threshold.
When the displaied value is less than the programmed threshold, the relay is disexcitated; when the
displaied value is equal to or greater then the programmed threshold, the relay is excitated. - Mode 3 - top
threshold with histeresis. This mode requiring threshold 1 and a histeresis; when the displaied value
come to threshold 1 value, the relay is excitated. When the displaied value fall the histeresis value, the relay
is disexcitated. Relay excitation and disexcitation are tied to two different delay times, singulary
programmable from 0 to 9,9 secs. After a reset or when the device is in idele state, past the programmed
delay time, the relay switch to the condition "threshold excitated or "threshold not excitated", in accordingly
to the programmed mode 1, 2 or 3.
CALCULATION PARAMETERS PROGRAMMING
DISEXCITATION DELAY
THRESHOLD 1
EXCITATION DELAY
RELAY
SENSOR
POWER SUPPLY
HISTERESIS
MODE 1 MODE 2 MODE 3
OPERATION PARAMETERS PROGRAMMING
OPERATION DIAGRAMS
PAGE 3LFP41
OPERATION WITH MODE 1 - 2 - 3
CET s.r.l.
- PRESS PUSH BUTTON FOR ABOUT 2 SECS. THE DISPLAY VISUALIZES:
GROUP 2 : ENTER CODE AND PRESS
QUIT PROGRAMMING
ENT
ENT
ENT
ENT
ENT
Delay time for the excitation of the relay 1, from 0 to 9,9 secs.
Delay time for the disexcitation of the relay 1 , from 0 to 9,9 secs
Up - dating time for visualized data, from 0 to 4 sec. included.
If set = 0 visualization is istantaneous.
Delay time for automating resetting , from 0 to 9,9 secs included.
If set = 0 visualization is istantaneus.
Input impuls speed programming:
- S = SLOW : input = 20Hz ( electromechanic contacts )
- F = FAST input 2 Kz or 10 Kz ( logic signal )
ENTER WITH AND.
PRESS PUSH - BUTTON OUTSIDE PROGRAMMING FOR NEW VALUE ENTERING ACCESS
ENTPROG
RES
PROG.
020 ENT
PRACTICAL EXAMPLES: ======
1) Display the rotational speed ( revolution per minute ) of a shaft counting pulses from a
proximity switch and using a 24 cog gear-wheel: - set the division factor = 24 - set the multiplier
factor = 60 (1 minute = 60 secs), in order to display the value with a minute time-base
2) Display the linear speed of a conveyor-belt in meters per hour, using a 500 pulses/rev
encoder, with 1 encoder revolution = 33.3 cm.: - set the division factor = 500 - set the multiplier
factor = 1200 ( 1 hour = 3600 secs; 33,3 cm = 1/3 m -> 3600/3 = 1200 )
Agent:
DRILL TEMPLATEBACK
93
45
48
96
1 83 5 74 6 9 10 11 12 132
WIRING CONNECTIONS
PAGE 4 LFP41
ENT
RES
LFPperiod counter
FRONT 10 Max.
SIDE
RETAINING
BRACKETS
REMOVABLE
TERMINAL
139
115 15 9
44 X 92
L1 L2
96
48
PROG
OVERALL DIMENSION ( mm )
INPUT SIGNALS
P R O X I M I T Y A N D E N C O D E R
A M P L I F I E D - 2 4 Vdc
P R O X .
E N C O D.
5 7 6
7 6 7 5
T T L L O G I C
- N P N -
T T L L O G I C
- P N P -
7 6 7 5
C O N T A C T N P N C O N T A C T P N P
CET s.r.l.
SS 211 Km 53,550
28071 Borgolavezzaro - No - ITALY
Tel : ++39 321-885180/885301/885807
Fax : ++39 321-885560
CET s.r.l.
12345678910 11 12 13
V dc
0 24 0 220
24 Vdc
80mA
V ac
I N 1
R L 1
P R O G R A M M I N G
N P N O R P N P
P R O G R A M M I N G
N P N P N P
-
1
-
2
-
3
-
4
CET LFP41 is a period counter that can be used to measure rotational or linear speed, or count events over a set time period. It has several programmable parameters, including:
- Multiplier of impulses (1 to 9999)
- Divisor of impulses (1 to 999)
- Threshold mode (top threshold, bottom threshold, or top threshold with hysteresis)
- Excitation relay time (0 to 9.9 seconds)
- Disexcitation relay time (0 to 9.9 seconds)
- Automatic time reset (0 to 99 seconds)
- Display update time (0 to 4 seconds)
- Input type (slow or fast)
Some example use cases for the CET LFP41 include:
- Displaying the rotational speed of a shaft in revolutions per minute (RPM)
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