Panasonic LC2H preset User manual

2022.5
Preset Counter
LC2H
* The contents of this catalog are as of October 2017.
For the latest information, please visit our company website.

2
Counter
LC2H Preset Counter
RoHS compliance
Features
Half-size body
(24 x 48 mm 0.945 × 1.890 in)
equipped with the preset
function
• Preset function equipped in half size
(24 × 48 mm 0.945 × 1.890 in)
• 7-segment LCD with backlight for fantastic
visibility
The backlight is switchable between green and red and the display can
be switchedbetweenlightingandashingilluminationwhencountingup
• 8.7 mm 0.343 in Letter Height
(Number of digits: 8 digits)
• Counting Speed Switchable between 30 Hz and
5 kHz
• IP66 compliant for resistance against negative
environmental inuences
(only when panel surface uses rubber packing)
•Includes reassuring lock mode and lock switch
to prevent erroneous operation
• Screw terminals are constructed to protect
ngers to ensure safety
IP66
Mode selectable
PRODUCT TYPES
No. digits
Counting
speed
Output mode Output Operating
voltage Model No.
8 digits
30 Hz/
5 kHz
switchable
• Output maintain/hold count
• Output maintain/over count
• One shot/over count
• One shot/recount
Tr (1a) 24 V DC LC2HP-FEW-B-DC24V
Options Mounting frame Useforwaterproong
(front panel surface)
ATH3803
Rubber gasket ATH3804
Note: Mounting frame and rubber gasket are not included.
CHANGING THE PRESET VALUE
It is possible to change the preset value even during counting. However, be aware of the following
points.
• If the preset value is changed to less than the count value with counting set to the addition direction, counting will
continue until it reaches full scale, returns to "0 (zero)", and then reaches the new preset value. If the preset value is
changed to a value above the count value, counting will continue until the count value reaches the new preset value.
• Suppose that the counter is preset to count down. Whether a preset count down value is smaller or larger than the count
value, the counter counts down to "0 (zero)".
If the preset value is changed to"0 (zero)", the counter will not complete count-up. It starts
counting up when the counting value comes to "0 (zero)" again.
• Addition (up-count) input when counting is set to the addition direction, counting will continue until full scale is reached,
return to "0 (zero)" and then complete count-up.
• Subtraction (down-count) input when counting is set to the subtraction direction, counting will continue until full scale
"-9999999" is reached, and then the display will change to “ ”.
* Refer to our website for details of product.

LC2H Preset Counter
3
CAUTIONS FOR USE
Input and output connection
Input connection
• Contact input
Use highly reliable metal plated contacts. Since the
contact's bounce time leads directly to error in the count
value, use contacts with as short a bounce time as
possible.
In general, select input to have a maximum counting
speed of 30 Hz.
1342
Reset
input
Count
input
5
6
• Non-contact input (Transistor input)
Connect with an open collector. Use transistors whose
characteristics satisfy the criteria given below.
VCEO = Min. 20 V
IC= Min. 20 mA
ICBO=Max.6μA
Also, use transistors with a residual voltage of less than 2
V when the transistor is on.
* Theshort-circuitimpedanceshouldbelessthan1kΩ.
Whentheimpedanceis0Ω,thecurrentcomingfromthe
count input terminal is approximately 5 mA and from the
reset input terminal is approximately 1.5 mA.
Also, the open-circuit impedance should be more than
100kΩ.
12 34 Reset
input
Count
input
5
6
• Input wiring
When wiring, use shielded wires or metallic wire tubes,
and keep the wire lengths as short as possible.
Output connection
Since the transistor output of counter is insulated from the
internal circuitry by a photo-coupler, it can be used as an
NPN output or PNP (equal value) output.
125
6
Load
Load's
power
supply
+
–
12
3
3
4
4
5
6
Load
Load's
power
supply
+
–
As NPN output
As PNP output
Self-diagnosis function
If a malfunction occurs, one of the following displays will
appear.
Display Contents
Output
condition
Restoration
procedure
Preset
values after
restoration
Err-00
Malfunctioning
CPU
OFF
Enter front
reset key
or restart
counter
The preset value at
start-up before the CPU
malfunction occurred.
Err-01
Malfunctioning
memory*
0
* Includes the possibility that the EEPROM's life has expired.
Terminal connection
• When wiring the terminals, refer to the terminal layout
and wiring diagrams and be sure to perform the wiring
properly without errors.
An external power supply is required in order to run the
main unit.
Power should be applied between terminals and .
Terminal acts as the positive "+"connection and
terminal as the negative "–".
1
Operating voltage
+ –
23
4
5
6
• After turning the counter off, make sure that any resulting
induced voltage or residual voltage is not applied to
power supply terminals through . (If the power
supply wire is wired parallel to the high voltage wire or
power wire, an induced voltage may be generated at the
power supply terminal.)
• Have the power supply voltage pass through a switch or
relay so that it is applied at one time.

Disclaimer
Theapplicationsdescribedinthecatalogareallintendedforexamplesonly.Thepurchaseofourproductsdescribedinthecatalogshallnotbe
regardedasgrantingofalicensetouseourproductsinthedescribedapplications.WedoNOTwarrantthatwehaveobtainedsome
intellectualproperties,suchaspatentrights,withrespecttosuchapplications,orthatthedescribedapplicationsmaynotinfringeany
intellectualpropertyrights,suchaspatentrights,ofathirdparty.
PrintedinJapan
IndustrialDeviceBusinessDivision
7-1-1,Morofuku,Daito-shi,Osaka574-0044,Japan
industrial.panasonic.com/ac/e/
ⓒ PanasonicIndustryCo.,Ltd. Specificationsaresubjecttochangewithoutnotice. 2022.5
PanasonicIndustryCo.,Ltd.