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Timers

OMRON provides a range of Analog Timers and Digital Timers, as well as Time Switches for 24-hour, weekly, or annual time control.

Overview Features
Principles Classifications
Engineering Data Further Information

Related Contents

Primary Contents



Reference Material for Timers: Inrush Current

"---" indicates a constant current and therefore omitted from the table. All the values are approximate values and should therefore be used as a guide.

ModelVoltageApplied voltageInrush current
(pe Ak v Alue)
Time
(see note)
H3AM-NS/-NSR100 to 240 VAC264 VAC2.74 A1.7 ms
H3CA-A series24 to 240 VAC/12 to 240 VDC264 VAC1.6 A0.6 ms
H3CA-8/-8-306200/220/240 VAC264 VAC1.5 A0.6 ms
100/110/120 VAC132 VAC780 m A5 ms
24 VDC---------
H3CA-8H/-8H-306200/220/240 VAC264 VAC1.6 A0.6 ms
100/110/120 VAC132 VAC1.5 A5 ms
24 VDC26.4 VDC1.2 A2 ms
H3CR-A/-A8/-AP100 to 240 VAC/100 to 125 VDC264 VAC780 m A1.8 ms
137.5 VDC310 m A3.2 ms
24 to 48 VAC/12 to 48 VDC26.4 VAC830 m A2.4 ms
26.4 VDC570 m A6.3 ms
H3CR-A8E100 to 240 VAC/100 to 125 VDC264 VAC1.76 A0.1 ms
137.5 VDC550 m A0.2 ms
24 to 48 VAC/VDC26.4 VAC270 m A35 ms
26.4 VDC270 m A31 ms
H3CR-AS/-A8S24 to 48 VAC/12 to 48 VDC26.4 VAC370 m A2.2 ms
26.4 VDC250 m A3.2 ms
H3CR-F100 to 240 VAC/
100 to 125 VDC
264 VAC750 mA1 ms
137.5 VDC0.5 A9.1 ms
24 to 48 VAC/
12 to 48 VDC
26.4 VAC0.83 A10 ms
26.4 VDC0.57 A9.4 ms
H3CR-HS series100/110/120 VAC132 VAC1.05 A111 ms
200/220/240 VAC264 VAC1.07 A119 ms
24 VAC/VDC26.4 VAC1.26 A133 ms
26.4 VDC0.85 A137 ms
48 VDC52.8 VDC0.73 A112 ms
100 to 125 VDC137.5 VDC0.62 A109 ms
M series100/110/120 VAC132 VAC1.02 A364 ms
200/220/240 VAC264 VAC1.03 A323 ms
24 VAC/VDC26.4 VAC1.21 A478 ms
26.4 VDC0.87 A560 ms
48 VDC52.8 VDC0.71 A384 ms
DC100 to 125 VDC137.5 VDC0.62 A380 ms
H3DE-MS/F/G24 to 230 VAC/VDC253 VAC4.4 A0.03 ms
253 VDC2.68 A0.03 ms
26.4 VDC203 m A11 ms
H3DE-H200 to 230 VAC200 VAC0.8 A130 ms
100 to 120 VAC100 VAC0 .93 A130 ms
48 VAC/VDC48 VAC0.95 A130 ms
48 VDC0.68 A70 ms
24 VAC/VDC24 VAC1.25 A140 ms
24 VDC0.89 A40 ms
H3DK-M/S/F/G24 to 240 VAC/VDC264 VAC4.69 A46.27 ms
24 VDC0.168 A134 ms
264 VDC3.64 A46 ms
12 VDC13.2 VDC2.62 A418.67 ms
H3DK-H100 to 120 VAC132 VAC2.06 A1320 ms
200 to 240 VAC264 VAC2.38 A677.33 ms
24 to 48 VAC/VDC52.8 VAC1.81 A1810 ms
24 VAC1.68 A19.8 ms
24 VDC1.16 A35.2 ms
52.8 VDC2.44 A8.84 ms
H3DS24 to 230 VAC/24 to 48 VDC253 VAC3 A1 ms
26.4 VDC0.5 A4 ms
H3FA-A24 VDC26.4 VDC1.8 A0.01 ms
12 VDC13.2 VDC1.5 A0.01 ms
6 VDC6.6 VDC1.1 A0.05 ms
5 VDC5.5 VDC1.1 A0.05 ms
H3FA-SA24 VDC26.2 VDC1.8 A0.01 ms
12 VDC13.2 VDC1.5 A0.01 ms
6 VDC6.6 VDC1.1 A0.05 ms
5 VDC5.5 VDC1.1 A0.05 ms
H3M series200/220/240 VAC264 VAC1.2 A0.5 ms
100/110/120 VAC132 VAC620 mA0.4 ms
110 VDC---------
100 VDC---------
48 VDC52.8 VDC5 A1 ms
24 VDC26.4 VDC2.6 A1 ms
12 VDC13.2 VDC1.3 A1 ms
H3RN seriesAll specifications except for 24 VAC---------
24 VAC26.4 VAC200 mA60 ms
H3Y seriesAll specifications except for 12 VDC---------
12 VDC13.2 VDC350 mA0.4 ms
H3YN seriesAll specifications except for 12 VDC---------
12 VDC13.2 VDC600 mA1 ms
H5AN series100 to 240 VAC264 VAC23 A1 ms
100 VDC110 VDC8 A2 ms
12 to 24 VDC26.4 VDC15 A6.5 ms
H5CN series100 to 240 VAC264 VAC800 mA1 ms
12 to 48 VDC52.8 VDC400 mA1 ms
H5CX-A[]-N series100 to 240 VAC264 VAC4.8 A0.5 ms
H5CX-A[]D-N series24 VAC/12 to 24 VDC26.4 VAC9.5 A1 ms
26.4 VDC6.6 A1 ms
H5CX-L[]-N series100-240 VAC264 VAC5.3 A0.4 ms
24 VAC/12 to 25 VDC26.4 VAC6.4 A1.4 ms
26.4 VDC4.4 A1.7 ms
H5CX-B[]-N series12 to 24 VDC26.4 VDC4.4 A1.7 ms
H5CX-A/-L series
(previous models)
100 to 240 VAC264 VAC5.3 A0.4 ms
24 VAC/12-24 VDC26.4 VAC6.4 A1.4 ms
26.4 VDC4.4 A1.7 ms
H5CX-B series
(previous models)
12 to 24 VDC26.4 VDC6 A1.2 ms
H5CZ series100-240 VAC264 VAC4.6 A0.4 ms
24 VAC/12-24 VDC26.4 VAC9.5 A1 ms
26.4 VDC6.6 A1 ms

Time Switches

ModelVoltageApplied voltageInrush current
(peak value)
Time (see note)
H2F series100 to 240 VAC264 VAC2 A0.3 ms
12 to 24 VDC26.4 VDC1.9 A0.7 ms
H4KV-DSA-R100 to 200 VAC240 VAC4.8 A1.1 ms
H4KV-DSA (previous models)100 to 200 VAC240 VAC0.7 A0.5 ms
H5L-AAll specifications---------
H5S-W series100 to 240 VAC264 VAC3.1 A0.2 ms
24 VDC26.4 VDC1.3 A2.7 ms
H5S-Y series100 to 240 VAC264 VAC3.1 A0.2 ms
24 VDC26.4 VDC1.4 A2.7 ms
H5S series (previous models)100 to 240 VAC264 VAC2.5 A0.3 ms
24 VDC26.4 VDC1.1 A3 ms
H5F series100 to 240 VAC264 VAC2 A0.3 ms

Note:The time of the inrush current is measured as shown in the following figure.

Inrush_Current_Time_Switches_graph

Timer Glossary

Term Definitions

ON Time

The period of time during which a required voltage is being applied to he operating circuit.

OFF Time

The period of time between the moment that resetting begins and the moment that the operating voltage is applied to the operating circuit.
Therefore, the OFF time of the Timer is larger than the resetting time.

The period of time from the application of a required voltage to the operating circuit until the completion of the time-limit contact operation.

The period of time from the completion of the time-limit operation to the start of the reset operation.

Resetting Time

The period of time from the interruption of the voltage supplied to the operating circuit during or after the time-limit operation until the return of the Timer to its initial state.

Resetting_time_diagram

The resetting time of the Timer is the period of time during which all the internal components including the contacts, pointer, and the circuit components, such as the capacitor, of the Timer are reset.
If the Timer is in operation with an insufficient OFF time (i.e., the OFF time is less than the rated resetting time), the normal operation of the Timer cannot be expected. In such cases, the Timer may operate with insufficient operating time, operate instantaneously, or not operate at all. Be sure that the OFF time of the Timer is the same as or more than the rated resetting time.

Self-reset

To automatically reset the Timer by interrupting the voltage being supplied to the operating circuit.

Electrical Reset

To reset Timer by applying a required voltage to the reset circuit.

To mechanically reset the Timer by manual operation.

Synchronous Motor (Time Switch)

A motor that operates in synchronization with the power frequency (50/60 ㎐). Because of the simplicity of a structure using this type of
motor, it is reasonably priced.
The motor stops when there is a power interruption, so the time must be reset after the power is restored.

Quartz Motor (Time Switch)

The motor is operated by quartz oscillation. The quartz motor is equipped with a corrective function for power interruptions, so it can be used immediately after the power is restored.

Differences of operating times measured when the Timer repeats operation under the same condition with a given setting time.
Formula for calculation (with operating time measured more than 5 times):

Accuracy_of_Operating_Time_formula1

where,
T max.:
Maximum value of operating times measured at the same set time
T min.:
Minimum value of operating times measured at the same set time
TMs:
Maximum scale time (TMs is a set value in the case of a Digital Timer)

Differences in the operating time appear as a shift from the central value of the operation, so the maximum or minimum value is divided by 2 and expressed as a plus (+) or minus (-) indication.

Accuracy_of_Operating_Time_diagram

If there are setting changes in the H3CA or other types of Analog Timer while they are in time-limit operation, the following operation will result.

Accuracy_of_Operating_Time_formula2

T:
Final time-up time
T1:
Time elapsed
T2:
New setting
T3:
Previous setting

A difference between the actual operating time and scale time.Formula for calculation (measurement position can be any scale position as long as it is set to 1/3 min. of the maximum scale time):

Setting_Error_formula

where,
TM:
Average value of measured operating times
Ts:
Set time
TMs:
Maximum scale time (TMs is a set value in the case of the Digital Timer)

A change in operating time when the voltage of the control power source changes within the permissible fluctuation range.
Formula for calculation:
Variation due to voltage change

Influence_of_Voltage

where,
TM1:
Average value of operating times measured at rated voltage
TMx2:
Average value of operating times measured at a voltage which causes the maximum deviation from TM1 within the permissible fluctuation range.
TMs:
Maximum scale time (TMs is a set value in the case of the Digital Timer.)

Influence of Temperature

A change in operating time when the ambient temperature changes within a permissible range.
Formula for calculation:
Variation due to temperature change

Influence_of_Temperature_formula

where,
TM2:
Average value of operating times measured at 20°C.
TMx2:
Average value of operating times measured at a temperature which causes the maximum deviation from TM2 within the specified ambient temperature range.
TMs:
Maximum scale time (TMs is a set value in the case of the Digital Timer.)

OFF Time Characteristics

A change in operating time when the operating time in a given OFF time and the OFF time are changed.
Formula for calculation:
OFF time characteristic

OFF_Time_Characteristics_formula

TM3:
Average value of operating times measured with a 1-second OFF time.
TMx3:
Average value of operating times measured with an OFF time that causes the maximum deviation from TMx3 within the specified OFF-time range of one hour from the specified resetting time.
TMs:
Maximum scale time (TMs is a set value in the case of the Digital Timer.)

OFF-time characteristics are determined by the charging and discharging of a capacitor and resistor used in combination as an Electronic Timer. The haracteristics vary by ±1.5% to ±5%.

Operating time accuracy, setting error, influence of voltage, influence of temperature, and OFF-time characteristics are items used to express the precision of the Timer. Any of these items may be ignored depending on the particular specifications of the model.

The Motor Timer and Electronic Timer indicate these items by percentage values. The Count Timer indicates these items by differential time values because the differential range of the Timer's operating time is almost definite due to the operating principle of theTimer. Furthermore, the Count Timer total setting error can be indicated to express all these items in the case of the Count Timer.

Vibration Resistance (Malfunction)

The range of vibration during operation in which contacts that are closed will not open by vibration for a period exceeding the specified time (1 ms).

Vibration Resistance (Destruction)

The range of vibration in which there is no damage to parts during transport or use, and the operating characteristics are still satisfied.

Shock Resistance (Malfunction)

The range of shock during operation in which contacts that are closed will not open by shock for a period exceeding the specified time (1 ms).

Shock Resistance (Destruction)

The range of shock in which there is no damage to parts during transport or use, and the operating characteristics are still satisfied.

Insulation Resistance

The resistance offered by an insulating material to the flow of current resulting from an impressed DC voltage.

Dielectric Strength

The voltage level that will not cause insulation breakdown when applied for 1 minute to the same location as in the insulation resistance measurement.

Impulse Withstand Voltage (AC)

A voltage imposed between the operating power supply terminals or between a charged terminal and non-charged metal part to check the withstand surge voltage of the Timer. The impulse withstand voltage imposed between the operating power supply terminals is 3 kV and that imposed between a charged terminal and non-charged metal part is 4.5 kV with both using a ±1.2 × 50-μs standard waveform.

The mechanical and physical resistance of the Timer against external noise.
The noise resistance of the Timer is checked with a noise simulator, a coil load, an oscillating relay, and static electric noise.

Mechanical Life Expectancy

The life expectancy of a Timer when the control output of the Timer is operated under no load condition.

Electrical Life Expectancy

The life expectancy of a Timer when the control output of the Timer is operated to switch the specified voltage/current load connected to
the control output.
The electrical or mechanical life of the Timer is generally indicated by the operating times of control output. The electrical life is indicated by the operating time of the control output connected to a load and the mechanical life is indicated by the operating time of the control output with no load. The electrical life is shorter than the mechanical life.
The lighter the load is, the longer the electrical life will be. Therefore, to prolong the electrical life of the Timer, use the Timer to switch heavy loads via relays instead of directly switching them with the control output.

Symbols Used in Internal Connection Diagram of Timers

NameSymbolDescription
NO contacts
Normally open contacts (A pair of contacts which are normally open when no relay input is applied.)
NC contacts
Normally closed contacts (A pair of contacts which are normally closed when no relay input is applied.)
Transfer contacts
Transfer contacts (NO and NC contacts which have a common contact terminal are collectively called "transfer contacts.")
A variety of contacts shown in ① and ② are all transfer contacts with NC contact arranged either on the right side or on the upper side.
Time-limit operating contacts
① NO contacts
② NC contacts
Time-limit resetting contacts
① NO contacts
② NC contacts
Time-limit operation, time- limit resetting contacts
① NO contacts
② NC contacts
Manually operated, automatic resetting contact
Contacts that reset upon release of the hand, and used as the contacts to operate a pushbutton switch. (Same for pushbutton, pull, and rotating switches.)

① NO contacts
② NC contacts
Synchronous motor
A miniature motor which operates in synchronization with power frequency.
Relay
An electromagnetic relay
LED
Used to indicate the operating state of the Timer.

Recommended Products

H3CR-A

Multiple Operating Modes and Multiple Time Ranges. DIN 48 x 48-mm Multifunctional Timer.

H5CX

DIN 48 × 48-mm Multifunction Digital Timer/2-stage Digital Timer

H5CZ

Easy to Use and Easy to Read.