LC4H-T4-DC24VS Panasonic Electric Works, LC4H-T4-DC24VS Datasheet - Page 28

LC4H-T4-DC24VS

Manufacturer Part Number

LC4H-T4-DC24VS

Description

COUNTER DIGITAL 24VDC SCREW TERM

Manufacturer

Panasonic Electric Works

Series

LC4Hr

Datasheet

1.LC4H-R4-DC24V.pdf (45 pages)

Specifications of LC4H-T4-DC24VS

Count Rate

30Hz or 5kHz Selectable

Number Of Digits/alpha

Input Type

Switch Closure or Transistor Switch

Output Type

Transistor

Voltage - Supply

12 V ~ 24 V

Display Type

LCD Backlit

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

LC4HT4DC24VS
Q1150188

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3) The LC4H series use power supply

without a transformer (power and input

terminals are not insulated). In connect-

ing various kinds of input signals, there-

fore, use a power transformer in which

the primary side is separated from the

ungrounded secondary side as shown in

Fig. A, for the power supply for a sensor

and other input devices so that short-cir-

cuiting can be prevented.

Once the wiring to be used is completely

installed and prior to installing this

counter, confirm that there is complete

insulation between the wires connected

to the power terminals (2 each) and the

wires connected to each input terminal. If

the power and input lines are not insulat-

ed, a short-circuit may occur inside the

counter and result in internal damage.

In addition, when moving your equipment

to a new installation location, confirm

that there is no difference in environmen-

tal conditions as compared to the previ-

ous location.

(except LC4H-S/AC type)

4) The input signal is applied by the

shorting of each input terminal with the

common terminal (terminal Q for 8-pin

type, terminal E for 11-pin type and ter-

minal

connect other terminals or voltages high-

er than 40 V DC , because it may

destroy the internal circuitry.

5) Transistor output

(1) Since the transistor output is insulat-

ed from the internal circuitry by a pho-

tocoupler, it can be used as an NPN

output or PNP (equal value) output.

(The above example is 11-pin type)

for screw terminal types). Never

( Fig. A ) Good example

( Fig. B ) Bad example

AC power supply

Insulation transformer

Single coil transformer

Counter

(+)

(–)

(+)

(–)

(+)

(–)

Alternative

current flow

(e.g., sensor)

Input device

Note: With the LC4H 8-pin type and the LC4H-W,

there is no diode between points I and O.

(2) Use the diode connected to the out-

put transistor’s collector for absorbing

the reverse voltage from induced loads.

(LC4H only)

6) When wiring, use shielded wires or

metallic wire tubes, and keep the wire

lengths as short as possible.

4. Output mode setting

The output mode can be set with the DIP

switches on the side of the counter.

Make the DIP switch settings before

installing the counter on the panel.

5. Conditions of usage

1) Avoid locations subject to flammable

or corrosive gases, excessive dust, oil,

vibrations, or excessive shocks.

2) Since the cover of the unit is made of

polycarbonate resin, avoid contact with

or use in environments containing methyl

alcohol, benzene, thinners, and other

organic solvents; and ammonia, caustic

sodas, and other alkaline substances.

3) If power supply surges exceed the val-

ues given below, the internal circuits may

become damaged. Be sure to use surge

absorbing element to prevent this from

happening.

4) Regarding external noise, the values

Operating voltage Surge voltage (peak value)

Diode rating:

As NPN output

As PNP output

PRECAUTIONS IN USING THE LC4H SERIES

(forward current): 1 A

(reverse voltage): 600 V

24V AC type

DC type

AC type

Load’s power supply

LC4H counter

{

Load

power supply

Load’s

Load

6,000V

1,000V

Inductive load

• Surge wave form

[± (1.2 × 50) ms uni-polar full wave voltage]

6) Long periods of continuous operation

in the count-up completed condition (one

month or more) will result in the weaken-

ing of the internal electrical components

from the generated heat and, therefore,

should be avoided. If you do plan to use

the unit for such continuous operation,

use in conjunction with a relay as shown

in the circuit in the diagram below.

below are considered the noise-resistant

voltages. If voltages rise above these

values, malfunctions or damage to the

internal circuitry may result, so take the

necessary precautions.

Noise wave form (noise simulator)

Rise time: 1 ns

Pulse width: 1 µs, 50 ns

Polarity: ±

Cycle: 100 cycles/second

5) When connecting the operation power

supply, make sure that no leakage cur-

rent enters the counter. For example,

when performing contact protection, if

set up like that of diagram A, leaking cur-

rent will pass through C and R, enter the

unit, and cause incorrect operation.

Diagram B shows the correct setup.

Operation power supply

voltage

Noise

100

Relay

Power supply terminals

AC type

1,500V

1.2

Time (µs)

Leakage current

Peak value

24V AC type

(Fig. A)

(Fig. B)

Counter

DC type

1,000V

Receive output

from contact

at relay R

terminals

600V

Input

141