Panasonic LC2H Leakage current, Terminal connections, Control output, Installing the counter

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PRECAUTIONS IN USING THE COUNTER

5. Leakage current

1)For connecting operating voltage to the counter, a circuit should be used, which will prevent the flow of leakage current. For example, a circuit for con- tact protection as shown in Fig A. will permit leakage current flow through R and C, causing erroneous operation of the counter. Instead, the circuit shown in Fig. B should be used.

(Fig. A)

 

 

 

(Fig. B)

 

 

 

Leakage current

 

 

 

 

 

 

 

 

 

R

 

Operating

R

C

C

Operating

 

C

voltage

voltage

 

 

 

 

Counter

 

C

Counter

 

 

 

 

 

 

2)If the counter is directly switched with a non-contact ele- ment, leak cur- rent may flow into the counter and cause it to malfunction.

Cautions for use (common for all models)

1. Terminal connections

Correctly connect the pins while seeing the terminal layout/wiring diagram. In particular, the DC type, which has polari- ties, does not operate with the polarities connected reverse. Any incorrect con- nection can cause abnormal heating or ignition.

2.Connection to operating voltage 1)Apply the entire supply voltage through a switch, relay or other contact.

2) The operating voltage for the DC type must be at the specified ripple percent- age or less. The average voltage must fall within the allowable operating voltage range.

Rectification type

Ripple percentage

Single-phase, full-wave

Approx. 48%

Three-phase, full-wave

Approx. 4%

Three-phase, half-wave

Approx. 17%

3)Make sure that no induced voltage and residual voltage are applied between the power terminals on the counter after the power switch is turned OFF.

(If the power line is wired in parallel with the high-voltage and motor lines, induced voltage may be produced between the power pins.)

3. Control output

1)Keep the load capacity below the counter's rated control capacity. If used above the rating, the counter's service life may shorten. With the transistor out- put type counters, transistors may be damaged.

4. Installing the counter

1)To install the counter, use the dedicat- ed pin bracket or socket (cap). Avoid connecting the pins on the counter by directly soldering them.

2)In order to maintain the characteris- tics, do not remove the counter cover (case).

5.Superimposed surge of power supply

For the superimposed surge of power supply, the standard waveform (±1.2 50µs or ±1 40µs) is taken as the stan- dard value for surge-proof voltage. (The positive and negative voltages are applied each three or five times between the power pins.)

For the standard values for the LC4H type counters, see the respective items in "Cautions for use."

Single-pole, full-wave voltage for surge

waveform [±(1.2 50) µs]

 

 

100

 

 

)

90

 

 

%

 

 

 

 

 

(

 

 

 

voltage

 

Peak value

 

50

 

 

Surge

30

 

 

 

 

 

 

0

1.2

50

 

0

Time (s)

If external surge occurs exceeding the specified value, the internal circuit may break down. In this case, use a surge absorption element. The typical surge absorption elements include a varistor, a capacitor, and a diode. If a surge absorption element is used, use an oscil- loscope to see whether or not the foreign surge exceeding the specified value appears.

6. Signal input

The counter's signal input comes in two ways. One is by opening and closing the input terminal. The other is by applying a specified H-level or L-level voltage to the input terminal.

For an input sensor's residual voltage, input impedance, input voltage level and other signal input conditions, see the rat- ings for each type of product.

7. Operating environment

1)For the ambient operating tempera- ture and humidity, see the ratings for each type of product.

2)Avoid using the counter in a location where inflammable or corrosive gas is generated, the counter is exposed to much dust and other foreign matter; water or oil is splashed on the counter; or vibra- tions or shocks are given to the counter.

3)The counter cover (case), the knobs, and the dials are made of polycarbonat- ed resin. Therefore, prevent the counter from being exposed to organic solvents such as methyl alcohol, benzine, and thinner, strong acid substances such as caustic soda, and ammonia and avoid using the counter in atmosphere contain- ing any of those substances.

4)If the counter is used where noises are emitted frequently, separate the input signal elements (such as a sensor), the wiring for the input signal line, and the counter as far as possible from the noise source and the high power line contain- ing noises.

Input line

Sensor,

etc.

Counter

As remote as possible

 

 

 

 

 

 

Power line, etc.

8. Checking the actual load

In order to increase the reliability in the actual use, check the quality of the counter in the actual usage.

9. Others

1)If the counter is used exceeding the ratings (operating voltage and control capacity), the contact life, or any other specified limit, abnormal heat, smoke, or ignition may occur.

2)The LC2H series counter, incorpo- rates a lithium battery.

Never disassemble the lithium battery or throw it into fire because this may affect humans and facilities. The lithium bat- tery must be disposed of as an incom- bustible like other used batteries.

3)If any malfunction of the counter is likely to affect human life and properties, give allowance to the rated values and performance values. In addition, take appropriate safety measures such as a duplex circuit from the viewpoint of prod- uct liabilities.

CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net

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Contents Timers/Time Switches/Counters/Hour Meters Product types FeaturesProduct chart PC board mounting type Installation frame type Standard typeSpecifications 100 Applicable standardCommon Part names DimensionsTerminal layout and wiring diagrams 1 Standard type Installation frame typePanel mounting diagram Panel cut-out dimensionsStandard type PC board mounting type External dimensionsTerminal layout and wiring diagrams Input method104 Explanation of operationBacklight type Environment for use Voltage input typeFree voltage input type Voltage input type Backlight luminanceATH3803 RoHS Directive compatibility information106 One shot/over count One shot/recount Options Mounting frame107 Lock switch Front reset keyMode key Setting keyBacklight setting mode How to setPreset value setting mode Lock modeCompliance with the CE marking Output setting mode This sets the operation mode111 Operation modeSelf-diagnosis function Input and output connectionInput connection Contact input As PNP outputInsulation sheet LC2H total counter one-touch installation typeLC2H total counter installation frame type LC2H preset counterOptions Accessories for LC2H total counterLithium battery 3 Installation parts Mounting frameLCD AEL3Typical Counter Applications COUNTER-RELATED Terminology Connection of input Except for LC4H-S/AC type Protective circuit for counter contactLeakage current Installing the counterSuperimposed surge of power supply Signal input143 Sockets Unit mm inch, Tolerance ±1 ±.039Panel cover Black AccessoriesMounting parts Surface mount Installing DIN Size CounterInstallation methods 180 AttachmentCDX S1DXM-/S1DX PM48W PM4H-WPM48W PM4HW PMH-M PM4H-M/PM4S PMH-M PM4HM-/PM4SLC4H EM48S LC4H-L LC4HLC4H MC6 LC4H-L LC48W LC4H-WForeign Specifications Overview 120 800 180 240 Voltage Current Power During Input120 200 720 240 Pilot Duty B300 AC applied 120 600 360 240 Pilot Duty C300 AC appliedForeign Specifications LC4H-W Pilot Duty C300 CountersHour Meters LC4H-L Pilot Duty C300 LC4H-SAppropriate CE Markings OverviewCounter, Hour Meter conforming to EN/IEC standards CE markings and EC directives