Omron H5an series User manual

Digital Timer

H5AN

DIN-sized (72 x 72 mm) Quartz Timer with

Multiple Functions

• Wide time range from 1/100 seconds to 9999 hrs.

• Built-in power supply incorporated in timer enables direct

connection of sensors and other components.

• Draw-out construction allows maintenance without

disconnecting the wiring.

• Power supply freely selectable within a range of 100 to 240

VAC; a DC-operated version is also available.

• Control outputs of both contact type and solid-state type

simultaneously available.

• Seven operating modes (N, F, C, R, K, P, and Q) are available.

Ordering Information

Note: 1. Specify both the model number and supply voltage when ordering.

2. The Timer is supplied with two mounting fixtures.

Operation system Resetting system No. of digits Backup power supply

function for memory

protection

Model

Time-limit operation,

integrating operation

Power-OFF resetting

(excluding -M),

external resetting,

manual resetting, automatic

resetting

4 digits (switch-selectable):

0.01 to 99.99 s, 0.1 to 999.9 s, 1 to 9999 s, 0.1

to 999.9 min, 0.1 to 999.9 hrs, 1 to 9999 hrs,

1 s to 99 min 59 s, 1 min to 99 hrs 59 min

Not provided H5AN-4D

Provided (approx.

10 years at 20°C)

H5AN-4DM

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H5AN

Specifications

■Ratings

Note: Inrush current was measured within the range shown below.

■Characteristics

Note: This value denotes the average of the repeat accuracy, setting error, and variations due to voltage and temperature changes. It includes the

rise time of the power supply, and the operating time of the internal and output circuits.

Item H5AN-4D/H5AN-4DM

Rated supply voltage H5AN-4D: 100 to 240 VAC (50/60 Hz),

12 to 24, 48, or 100 VDC (permissible ripple: 20% max.)

H5AN-4DM: 100 to 240 VAC (50/60 Hz)

12 to 24 VDC (permissible ripple: 20% max.)

Operating voltage range 85% to 110% of rated supply voltage

Power consumption Approx. 10 VA (at 240 VAC, 50 Hz), approx. 5 W (at 24 VDC)

Resetting system and gate

input

Reset by power-OFF: min. power OFF time: 0.5 s

External reset or gate (common to contact and solid-state inputs): min. reset input signal width: 0.02 s

One-shot output time 0.1 to 1 s (adjustable)

Control outputs Contact output: SPDT, 3 A at 250 VAC, resistive load (cosφ= 1)

Solid-state output: Open collector, 100 mA max. at 30 VDC max.

Power supply for externally

connected components

12 VDC±10%, 80 mA (permissible ripple: 5% max.)

Peak value

Inrush current

Time

Measurement

time

Accuracy of operating time ±0.01% ±0.05 s max. (power OFF start), ±0.005% ±0.03 s max. (reset start) (see note)

Setting error

Influence of voltage

Influence of temperature

Insulation resistance 100 MΩmin. (at 500 VDC) (between current-carrying terminal and exposed non-current carrying metal

parts, between non-continuous contacts)

Dielectric strength 2,000 VAC, 50/60 Hz for 1 min (between current-carrying and non-current-carrying metal parts)

750 VAC, 50/60 Hz for 1 min (between non-continuous contacts)

Vibration resistance Destruction: 10 to 55 Hz with 0.75-mm double amplitude

Malfunction: 10 to 55 Hz with 0.5-mm double amplitude

Shock resistance Destruction: 300 m/s2(approx. 30G)

Malfunction: 100 m/s2(approx. 10G)

Ambient temperature Operating: –10°C to 55°C

Storage: –25°C to 65°C

Ambient humidity Operating: 35% to 85%

Life expectancy Mechanical: 10,000,000 operations min. (under no load at 1,800 operations/h)

Electrical: 100,000 operations min. (3 A at 250 VAC, resistive load)

Approved standards UL (File No. E41515), CSA (File No. LR22310)

Weight Approx. 360 g

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H5AN

Engineering Data

Nomenclature

Switching operations (×103)

Load current (A) Load current (A)

Reference: A maximum current of 0.15 A can be switched at 125 VDC (cosφ= 1).

Maximum current of 0.1 A can be switched if L/R is 7 ms. In both cases,

a life of 100,000 operations can be expected.The minimum applicable

load is 10 mA at 5 VDC (P reference value).

Switching operations (×103)

7-segment LED display

Front cover

Time-up indicator

Reset input indicator

Pushbutton switch for manual reset

Internal unit fixing screw

One-shot time adjustment screw

Rated time label affixing section

(when a rated time label of 99 min

59 s is affixed)

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H5AN

Operation

■Timing Chart

Digital Display

Operation Mode

(The control output and digital display when the set time is up differ in each of the operation modes available.)

UP Display DOWN Display

(See note)

Note: After the set time has elapsed, operation continues according to the mode (N, F, C, R, K, P, or Q).

Mode UP display DOWN display Operation after the set time is up

NThe control output and digital display

are held until a reset input is applied.

FIn UP mode, the digital display

continues to increment up to “9999”

even after reaching the set value and

then returns to all zeroes. In DOWN

mode, the digital display continues to

up 9999, and then decrements “9998,

9997, ...,” after reaching all zeroes.

The control output is held until a reset

input is applied.

CThe digital display returns to the initial

setting once the set time has elapsed

and the timer restarts the timing

operation.

When the set time has elapsed, the

output signal is generated during the

one-shot time. The timer repeats this

cycle.

RThe digital display returns to the initial

setting after the one-shot time and the

timer restarts the timing operation.

When the set time has elapsed, the

output signal is generated during the

one-shot time. The timer repeats this

cycle.

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H5AN

Note: 1. When a rated time of 99 min 59 s or 99 h 59 min is selected, the overflow values of the digital display when using the DOWN (countdown)

function will be indicated as 9959, 9958, 9957, ... in modes F, K, and Q.

2. In this timing chart, the number of step advances during the one-shot time varies in accordance with the selected rated time and duration

of the one-shot time.

3. In C and P modes, set time value n should be sufficiently longer than the one-shot time t.

KIn UP mode, the digital display

continues to increment up to “9999”,

even after reaching the set value and

then returns to all zeroes. In DOWN

mode, the digital display continues up

to 9999, and the decrements “9998,

9997, ...,” after reaching all zeroes.

The timer restarts the timing operation

when the incrementing or

decrementing value reaches the set

value.

The output is generated during the

one-shot time. The timer repeats this

cycle.

PFor the digital display, the value at the

up is held during the one-shot time;

however, the timing operation of the

timer returns to the initial setting when

the set time has elapsed and the timer

restarts the timing operation. When

the set time has elapsed, the output

signal is generated during the one-

shot time. The timer repeats this cycle.

QIn UP mode, the digital display

continues to increment after reaching

the set value during the one-shot time.

In DOWN mode, the digital display

continues to 9999 and then

decrements “9998, 9997, ...,” after

reaching all zeros during the one-shot

time. However, in both UP and DOWN

modes, the digital display returns to

the initial setting after the one-shot

time and the timer restarts the timing

operation. When the set time has

elapsed, the output signal is

generated during the one-shot time.

The timer repeats this cycle.

Mode UP display DOWN display Operation after the set time is up

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H5AN

■Programming of Specifications

The built-in specifications selector switches are used for

programming UP or DOWN display, rated time, operation mode, and

output level of the solid-state output when the set time has elapsed,

etc. Set these switches for programming the desired functional

specifications by referring to Positions and Functions of Specification

Selector Switches.

Open the front cover.

The internal unit comes out by

loosening the internal unit fixing screw.

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H5AN

Positions and Functions of Specification Selector Switches

SW1

Note: Select the appropriate label, from the rated time labels supplied

as accessories, and affix it on the proper position on the front

panel.

SW2

Dimensions

Note: All units are in millimeters unless otherwise indicated.

SW3-1 Manual Reset Selector Switch

Enable

Disable

SW1 Time Range Selector Switch

SW2 Operation Mode Selector Switch

SW3-2 Solid-state Output Level Selector Switch

H: (Output level changes "low" to "high" when

the set time is up.)

L: (Output level changes "high" to "low" when

the set time is up.)

Switch position Rated time Setting range

0 99.99 s 0.01 to 99.99 s

1 999.9 s 0.1 to 999.9 s

2 9999 s 1 to 9999 s

3 99 min 59 s 1 s to 99 min 59 s

4 999.9 min 0.1 to 999.9 min

5 99 hrs 59 min 1 min to 99 hrs 59 min

6 999.9 hrs 0.1 to 999.9 hrs

7 9999 hrs 1 to 9999 hrs

8 99.99 s Same as switch position

“0”

9 999.9 s Same as switch position

“1”

Switch position Operating mode Display mode

0NDOWNdisplay

5PNote: Same as switch

position “0”

7 N (see note 1)

8NUPdisplay

DPNote: Same as switch

position “8”

F N (see note 2)

Panel Cutouts

Two mounting fixtures

M3.5 terminal screws

67.6 ×67.6

(Panel cutout conforms

to DIN 43700) (Horizontally connecting N

units)

{(n −1) ×72 + 70 } min.

(including 2-mm clearance

between units)

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H5AN

Installation

■Terminal Arrangement

■Connections

Power Supply Connection

Connect the required supply voltage to terminals 1 and 2.

Load Connection

Terminals 4, 5, and 6 are for contact output while terminals 12 and

13 are for solid-state output. (Terminal 14 is connected to absorb the

surge if an inductive load is connected.)

The control outputs of both contact type and solid-state type are

simultaneously available.

Load Operation

Gate input

Reset input

(0 V)

+12 V

Contact output

Unused

Power supply

For DC power

Terminal 1: −

Terminal 2: +

Unused

(Internally

connected)

Do not use unused

terminals for relaying.

Leave them open.

Note: Specifications for 12- to 24-VDC, 48-VDC, and 100-VDC

models are listed separately in this datasheet.

External

power

supply

AC Power Supply DC Power Supply

Load 3

(See

note.)

When a Load Operates with Contact Output

When a Load Operates with Solid-state Output

Load 1

Load 2

(See note.)

Note: Output transistor ON: Low (0 V)

Output transistor OFF: High (12 V)

Note: Connect a diode when using a Power Supply of 12 V or less.

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H5AN

Connection of Reset and Gate Inputs

For reset input, connect a contact or an open collector type transistor

between terminals 8 and 9. The timer resets when contact is made or

when the transistor is ON. For gate inputs, connect a contact or an

open collector type transistor between terminals 8 and 10. The timer

stops when contact is marked or when the transistor is ON.

Use a contact of high contact reliability, or an open collector type

transistor with characteristics: VCEO = 20 V min., VCE(S) (residual

voltage) = 3 V max., IC= 50 mA min. and ICBO (leakage current) =

0.5 μA max.. Use of a gate input contact with minimum contact

bounce (chatter) is a must, since the contact bounce time will cause

an error in timer operating time.

When connecting a solid-state circuit not of the open collector type to

the gate or reset inputs as shown below, the voltage of the solid-

state circuit (+V) should be 13 to 30 V, and the VCE(S) of the transistor

should be less than 3 V (the current that flows from either terminal 9

or 10 is approximately 10 mA). Moreover, it is essential that the

circuit be ON for gate or reset input, and OFF when there is no input.

Connection of a Power Supply for

Externally Connected Components

The H5AN has a built-in power supply for externally connected

components such as sensors for gate or reset input, or loads

connected to the solid-state control output (12 VDC, 80 mA).

Power can be applied to the sensors and loads simultaneously.

Simultaneous Input to a Number of

H5AN Timers with the Same Contact or

the Same Open Collector Transistor

A reset or gate input may be applied to two or more units of H5AN

with only one contact or transistor as shown below. In this case,

caution is required as a large current flows into the transistor. (The

current that flows from H5AN is approximately 10 mA pre unit.)

Load

(gate)

(reset)

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H5AN

Safety Precautions

Setting of Operating Time

Time Setting Range

Note: The decimal point is not shown in the digital display.

1. Since the H5AN Timer is capable of reading the input data at any

time during normal operation, the set time can be changed during

power application. This feature sets back the output from the

timer by temporarily setting the longer time or quickens the output

by setting the shorter time. During normal operation, the set time

may be accidentally changed by touching a thumbwheel switch,

causing the timer to operate with a different set time. To prevent

this possibility, keep the front cover closed except when changing

the set time.

2. When the set time is all zeroes (e.g., 000.0 s or 00 hrs 00 min),

there will be a momentary control output upon power application

which can be used to check normal output. When changing the

set time during normal operation, pay special attention not to alter

the set value to this state.

3. Since the sexagesimal system is adopted, when a rated time of

99 min 59 s or 99 hrs 59 min is selected, any value set to 6 or

more (i.e. 6-9) in the order of x 10 s or x 10 min respectively will

be rated as 5. Some erroneous setting examples are shown

below.

Examples of Setting/Actual Operating Time

4. When changing the set time while power is being supplied, an

inadequate push of the thumbwheel switches will display two

numbers in one digital display window, causing the operating time

to drift widely. Therefore, press the thumb-wheel switches surely.

Take particular care in the case when the other three digits are all

zero, since the improper setting of the fourth switch to create four

zeroes will cause a momentary output.

5. When operating the built-in selector switches of the H5AN-4DM

Timer with a backup power supply function for memory

protection, it is necessary to reset (either externally or manually)

the timer at the time the power is applied.

Also when this type of timer is connected to a device (or

manually) this must also be done when power is applied for the

first time.

Note: If the timer is not reset, it operates in accordance with the

previous specifications or with the factory set specifications.

Rated time Setting range

99.99 s 0.01 to 99.99 s (see note)

999.9 s 0.1 to 999.9 s (see note)

9999 s 1 to 9999 s

99 min 59 s 1 s to 99 min 59 s

999.9 min 0.1 to 999.9 min (see note)

99 hrs 59 min 1 min to 99 hrs 59 min

999.9 hrs 0.1 to 999.9 hrs (see note)

9999 hrs 1 to 9999 hrs

(Possible Operating Time)(Undesirable Setting)

5 min 30 s

59 s

99 min

59 min

99 hrs

00 h 00 min

(momentary

output)

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H5AN

Resetting of Type with a Backup Power

Supply Function for Memory Protection

6. The type without a backup power supply function for memory

protection operates as shown below depending on the duration of

the power failure.

(A) Power failure of 0.01 s max.

(B) Power failure of 0.5 s min.

The type with a backup power supply function for memory protection

restarts in the status preceding the power failure as shown in (A),

regardless of the duration of the power failure.

7. The type with backup power supply for memory protection

incorporates a battery for backup power supply which lasts for

about ten years of normal use, meaning data is retained even

during a power failure lasting ten years. (The battery cannot be

replaced.)

8. When using the timer in operation modes other than N and F

modes (i.e., C, R, K, P, and Q), the control output is available for

the one-shot time only. For this reason, adjust the one-shot time

by rotating the one-shot time adjustment screw on the front panel

(variable within a range to 0.1 to 1 s).

Mounting

A Mounting Fixture is included with the H5AN. Mount the Unit using

the Mounting Fixture so that the Unit is secure and does not move

Purchase of H5AN

Ye s

Is the timer

equipped with

memory

protection?

Drawn out the

internal unit from the

case, or switch off

the power to reset

the timer.

Selection of

specifications

Was the timer

reset after power

application?

The timer operates

according to the

factory-set

specifications.

The timer operates

according to the

desired specifications.

Specifications change in

the middle of operation.

Was the

timer reset?

The timer operates

according to the

specifications.

The timer operates

according to the desired

specifications.

Note: The timer starts in the initial

setting upon power recovery.

Note: The timer starts in the initial

setting upon power recovery.

Note: Either (A) or (B)

(Y92H-5)

Loosen (to the left) the

screws on the Mounting

Fixture sufficiently and

attach it from the bottom.

Tighten (to the right) the

screws on the Mounting

Fixture completely.

When the screw is

tightened completely,

you will hear it turning

freely in place.

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H5AN

A model is also available for vertical gang-mounting (Model H5AN-

4D(M)-300).

!WARNING

Fire, Explosion, and Severe Burn Hazard

The H5AN has a built-in lithium battery. Be sure to dispose of the old

H5AN properly, as lithium batteries are likely to explode if incinerated.

Label to cover holes

Fixture

Sunken nut

Specifications label

In the interest of product improvement, specifications are subject to change without notice.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.

To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

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Correctly Handling Input Signals

Malfunction due to noise may occur if input wiring is placed in the

same duct or conduit as power lines or high-voltage lines. Separate

input wiring from power lines and wire them in a separate system.

Also, use shielded cables, use metal conduits, and keep wiring

distances as short as possible.

Timers with Relays

•Do not connect a load that exceeds contact ratings, such as the

switching capacity (contact voltage or contact current). Insulation

faults, contact welding, contact faults, and other failures to achieve

specified performance may occur and the relay may be damaged or

may burn.

•Continued use with deteriorated performance may ultimately result

in insulation breakdown between circuits or relay burning. The life

of the built-in relay is greatly affected by switching conditions.

Before using the Timer, test operation under actual application

conditions and confirm that the switching frequency presents no

problems in performance.

•Electrical life depends on the type of load, switching frequency, and

ambient environment. Observe the following precautions when

using the Timer. When switching a DC load, contact transfer may

cause the contacts to stick or may cause contact failure. Confirm

applicability and consider using a surge absorbing element. When

switching at high frequencies, heat generated by arcing may cause

contacts to melt or may cause metal corrosion. Consider

connecting an arc absorbing element, reducing the switching

frequency, or lowering the humidity.

•The surge current depends on the type of load, which also affects

contact switching frequency and the number of operations. Check

the rated current and the surge current, and design the circuits with

sufficient margin.

•Arcing when switching and relay heating may result in ignition or

explosion. Do not use the Timer in atmospheres subject to

inflammable or explosive gases.

•Contact faults may occur. Do not use the Timer in atmospheres

subject to sulfidizing gas, chloride gas, or silicon gas.

•The switching capacity for DC voltage loads is lower than that for

AC voltage loads.

Timers with Non-contact Outputs

•Short faults or open faults may occur due to destruction of the

output element. Do not use the Timer for a load that exceeds the

rated output current.

•Short faults or open faults may occur due to destruction of the

output element from reverse electromotive force. When using the

Timer for a DC inductive load, always connect a diode as a

countermeasure against reverse electromotive force.

Other Precautions

•Confirm that you have the correct model before using it.

•Be sure that all terminals are wired correctly.

•Always test the output status with a tester before using a Timer with

a built-in keep relay (e.g., the H3CR-H and H3DE-H). Shock

resulting from dropping the Timer during transport or handling may

cause the output contacts to reverse or to be in a neutral status.

•Leaving the Timer with outputs ON at a high temperature for a long

time may hasten the degradation of internal parts (such as

electrolytic capacitors). Use the Timer in combination with relays

and avoid leaving the Timer with the output turned ON for an

extended period of time (e.g., for more than a month).

Reference Example (Use the Timer as shown below.)

•Be sure that only a qualified worker (e.g., an electrical engineer)

performs electrical work for the Timer.

Resistive load Solenoid load Motor load Incandescent

lamp load

Rated current 10 to 20 times

the rated

current

5 to 10 times

the rated

current

10 to 20 times

the rated

current

Sodium light

loads

Capacitor

loads

Transformer

loads

Mercury light

loads

1 to 3 times the

rated load

20 to 40 times

the rated load

5 to 15 times

the rated load

1 to 3 times the

rated load

X1T X2

X2/b T/a X1/a X1/a

Auxiliary relay

(e.g., MY Relays)

In the interest of product improvement, specifications are subject to change without notice.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.

To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

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Safety Precautions for All Timers

Refer to the Safety Precautions for individual Timers for precautions specific to each Timer.

!WARNING

!CAUTION

■Precautions for Safe Use

Operating Environment

•Use the Timer within the ratings specified for ambient operating

temperature and ambient operating humidity for each model.

•Store the Timer with the specified temperature range for each

model. If the Timer has been stored at a temperature of less than

−10°C, allow the Timer to stand at room temperature for at least 3

hours before using it.

•Use the Timer within the performance specified for water and oil

exposure for each model.

•Do not use the Timer in locations subject to shock and vibration.

Long-term usage in such locations may damage the Timer due to

stress.

Magnetic contactors generate a shock of 1,000 to 2,000 m/s2when

switching a load. When mounting to DIN Track, separate magnetic

contactors from the Timer so that the Timer is not subjected to

vibration and shock. Use anti-vibration rubber.

•Do not use the Timer in locations subject to excessive dust,

corrosive gases, or direct sunlight.

•Do not use organic solvents (such as paint thinner or benzine),

strong alkalis, or strong acids because they will damage the

external finish of the Timer.

•Separate the input devices, input wiring, and Timer as far as

possible from sources of noise and power lines carrying noise.

•When using the Timer in environments subject to large amounts of

static electricity (e.g., pipes carrying molding materials, powders, or

fluid materials), separate the Timer as far as possible from the

sources of static electricity.

•Do not remove the external case from the Timer.

•Do not use the Timer in locations where condensation may occur

due to high humidity or sudden temperature changes.

Condensation inside the Timer may result in malfunction or

damage to Timer elements.

•The life of internal parts may be reduced if Timers are mounted in

close proximity to each other.

•Resin and rubber parts (e.g., rubber packing) may deteriorate,

shrink, or harden depending on the operating environment (e.g.,

subjected to corrosive gases, ultraviolet light, or high

temperatures). We recommend periodic inspection and

replacement.

•Normal operation may not be possible in locations subject to

sulfidizing gas, such as in sewer systems or waste incinerators.

OMRON does not market any Timers or other control devices for

operation in atmospheres containing sulfidizing gas. Seal the Timer

so that sulfidizing gas will not enter it. If sealing is not possible,

OMRON does provide special Timers with improved resistance to

sulfidizing gas. Ask your OMRON representative for details.

Power Supply

•Be sure that the voltage applied is within the specified range,

otherwise the internal elements of the Timer may be damaged.

•Install a switch or circuit breaker that allows the operator to

immediately turn OFF the power, and label it to clearly indicate its

function.

•Maintain voltage fluctuations

in the power supply within

the specified range.

•Use a commercial power supply for the power supply voltage input

to models with AC inputs.

Inverters with an output frequency of 50/60 Hz are available, but

the rise in the internal temperature of the Timer may result in

ignition or burning. Do not use an inverter output for the power

supply of the Timer.

•The Timers listed below cannot be directly turned ON and OFF by

using an AC 2-wire proximity sensor to turn the Timer's power

supply ON and OFF.

Use the following countermeasure when using an AC 2-wire

proximity sensor with the Timer. (The power supply circuit in the

Timer uses half-wave rectification. Only a half AC wave is supplied

to the proximity sensor, which may cause operation to be unstable.)

Applicable Models

H3Y, H3YN, H3RN, H3CA-8, RD2P, and H3CR(-A, -A8, -AP, -F, and

-G)

Countermeasure

Wire through a relay and use the relay contacts to turn the power

supply ON and OFF.

Confirm the stability of operation after making the connections.

•Install protective measures (such as earth leakage breakers, wiring

breakers, or fuses) on the power supply side according to any

applicable laws or regulations.

The following Timers contain lithium batteries that are

not explosion proof.

1. Timers with Built-in Batteries: H5L

The Timer contains a lithium battery, which may occasionally

ignite or rupture. Do not disassemble, deform under pressure,

heat to 100°C or higher, or incinerate the Timer.

2. Timers with Replaceable Batteries: Y92S-20 (for H5CN-M)

The battery may occasionally rupture, ignite, or leak fluid. Do

not short the positive and negative terminals. Do not charge,

disassemble, deform under pressure, or throw the battery into a

fire. If a non-specified battery is used, the battery may leak fluid

or rupture, occasionally resulting in equipment failure or minor

injury. Use only the specified battery.

The following Timers contain lithium batteries that are

explosion proof.

Timers with Built-in Batteries: H5BR, H5AN-4DM, H5S, H5F, and

H4KV

The Timer contains a lithium battery, which may occasionally

ignite or rupture. Do not disassemble, deform under pressure,

heat to 100°C or higher, or incinerate the Timer.

Allowable

Voltage Range

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Correctly Handling Input Signals

Malfunction due to noise may occur if input wiring is placed in the

same duct or conduit as power lines or high-voltage lines. Separate

input wiring from power lines and wire them in a separate system.

Also, use shielded cables, use metal conduits, and keep wiring

distances as short as possible.

Timers with Relays

•Do not connect a load that exceeds contact ratings, such as the

switching capacity (contact voltage or contact current). Insulation

faults, contact welding, contact faults, and other failures to achieve

specified performance may occur and the relay may be damaged or

may burn.

•Continued use with deteriorated performance may ultimately result

in insulation breakdown between circuits or relay burning. The life

of the built-in relay is greatly affected by switching conditions.

Before using the Timer, test operation under actual application

conditions and confirm that the switching frequency presents no

problems in performance.

•Electrical life depends on the type of load, switching frequency, and

ambient environment. Observe the following precautions when

using the Timer. When switching a DC load, contact transfer may

cause the contacts to stick or may cause contact failure. Confirm

applicability and consider using a surge absorbing element. When

switching at high frequencies, heat generated by arcing may cause

contacts to melt or may cause metal corrosion. Consider

connecting an arc absorbing element, reducing the switching

frequency, or lowering the humidity.

•The surge current depends on the type of load, which also affects

contact switching frequency and the number of operations. Check

the rated current and the surge current, and design the circuits with

sufficient margin.

•Arcing when switching and relay heating may result in ignition or

explosion. Do not use the Timer in atmospheres subject to

inflammable or explosive gases.

•Contact faults may occur. Do not use the Timer in atmospheres

subject to sulfidizing gas, chloride gas, or silicon gas.

•The switching capacity for DC voltage loads is lower than that for

AC voltage loads.

Timers with Non-contact Outputs

•Short faults or open faults may occur due to destruction of the

output element. Do not use the Timer for a load that exceeds the

rated output current.

•Short faults or open faults may occur due to destruction of the

output element from reverse electromotive force. When using the

Timer for a DC inductive load, always connect a diode as a

countermeasure against reverse electromotive force.

Other Precautions

•Confirm that you have the correct model before using it.

•Be sure that all terminals are wired correctly.

•Always test the output status with a tester before using a Timer with

a built-in keep relay (e.g., the H3CR-H and H3DE-H). Shock

resulting from dropping the Timer during transport or handling may

cause the output contacts to reverse or to be in a neutral status.

•Leaving the Timer with outputs ON at a high temperature for a long

time may hasten the degradation of internal parts (such as

electrolytic capacitors). Use the Timer in combination with relays

and avoid leaving the Timer with the output turned ON for an

extended period of time (e.g., for more than a month).

Reference Example (Use the Timer as shown below.)

•Be sure that only a qualified worker (e.g., an electrical engineer)

performs electrical work for the Timer.

Resistive load Solenoid load Motor load Incandescent

lamp load

Rated current 10 to 20 times

the rated

current

5 to 10 times

the rated

current

10 to 20 times

the rated

current

Sodium light

loads

Capacitor

loads

Transformer

loads

Mercury light

loads

1 to 3 times the

rated load

20 to 40 times

the rated load

5 to 15 times

the rated load

1 to 3 times the

rated load

X1T X2

X2/b T/a X1/a X1/a

Auxiliary relay

(e.g., MY Relays)

In the interest of product improvement, specifications are subject to change without notice.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.

To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

http://www.ia.omron.com/ C-2

2008.2

OMRON Corporation

Industrial Automation Company

In the interest of product improvement, specifications are subject to change without notice.

Read and Understand This Catalog

Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or

comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if

speciﬁed) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR

FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE

HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL

OTHER WARRANTIES, EXPRESS OR IMPLIED.

LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS, OR COMMERCIAL

LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR

STRICT LIABILITY.

In no event shall responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS

OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT

SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's

application or use of the product.

At the customer's request, OMRON will provide applicable third party certiﬁcation documents identifying ratings and limitations of use that apply to the

products. This information by itself is not sufﬁcient for a complete determination of the suitability of the products in combination with the end product,

machine, system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible

uses of the products, nor is it intended to imply that the uses listed may be suitable for the products:

• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog.

• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety

equipment, and installations subject to separate industry or government regulations.

• Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE

SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT IS PROPERLY RATED AND

INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

Disclaimers

CHANGE IN SPECIFICATIONS

Product speciﬁcations and accessories may be changed at any time based on improvements and other reasons.

It is our practice to change model numbers when published ratings or features are changed, or when signiﬁcant construction changes are made.

However, some speciﬁcations of the product may be changed without any notice. When in doubt, special model numbers may be assigned to ﬁx

or establish key speciﬁcations for your application on your request. Please consult with your OMRON representative at any time to conﬁrm actual

speciﬁcations of purchased product.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.

ERRORS AND OMISSIONS

The information in this catalog has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical,

typographical, or proofreading errors, or omissions.

PERFORMANCE DATA

Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent

the result of OMRON’s test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON

Warranty and Limitations of Liability.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.

This catalog shall not be copied for sales or promotions without permission.

This catalog is protected by copyright and is intended solely for use in conjunction with the product. Please notify us before copying or reproducing this