Mechatronic Analog Timer
Please read and understand this catalog before purchasing the
products. Please consult your OMRON representative if you have any
questions or comments. Refer to Safety Precautions on page 7.
Large Setting Dial and Moving Pointers Ideal
for Easy Operation and Monitoring
• Incorporating an easy-to-see large setting dial with moving
• Wide time-setting range of 0.2 s to 60 h (available through three
time-range model types)
• Wide AC power supply range (100 to 240 VAC)
• IP65 watertight and dust-tight front panel.
• Approved by UL and CSA.
• Conforms to EN61812-1 and IEC60664-1
4 kV for Low Voltage, and EMC Directives.
• Conforms to EMC standards.
• Six-language instruction manual provided.
• Programmable contact enables the building of a self-holding
relay circuit as well as built-in instantaneous contact. (-NS)
• Memory retention (-NSR)
• Finger protection terminal block
• Enables easy sequence checks through instantaneous outputs
for a zero set value at any time range.
Model Number Legend
H3AM - NS - -
1 2 3
1. Resetting System 2. Time Range 3. Accessory
None: Self-resetting A: 0.5 s to 30 h None: Without accessory
R: Electric resetting B: 1 s to 60 h 300: Waterproof Packing
C: 0.2 s to 12 h (Y92S-35) provided
■ List of Models
Rated supply Resetting Control output Time range
voltage system 0.5 s to 30 h (30 s, 3 min, 1 s to 60 h (60 s, 6 min, 0.2 s to 12 h (12 s, 120 s,
(See note.) 30 min, 3 h, 30 h) 60 min, 6 h, 60 h) 12 min, 120 min, 12 h)
100 to 240 Self-resetting DPDT contact output H3AM-NS-A H3AM-NS-B H3AM-NS-C
VAC (Time-limit output SPDT and
(time-limit ↔ instantaneous))
Electric DPDT contact output H3AM-NSR-A H3AM-NSR-B H3AM-NSR-C
resetting (Time-limit output SPDT and
instantaneous output SPDT)
Note: The operation of the instantaneous contacts differs for the self-resetting and electric resetting systems. Refer to Timing Charts on page 5
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■ Accessory (Order Separately)
Waterproof Packing Y92S-35 (See note.)
Note: Supplied with H3AM-NS@-@-300 models.
Operating mode ON-delay
Screw tightening torque 0.98 N·m (10 kgf) max.
Input type Voltage input
Output type Relay: DPDT
Mounting method Flush/Panel mounting, no restriction on mounting angle.
Approved standards UL 508, CSA C22.2 No. 14
Conforms to EN61812-1, IEC60664-1 4 kV/2, VDE0106/P100
Output category according to IEC60947-5-1
■ Time Ranges
Model Full scale on Set time unit
dial s 10 s min 10 min h (hour) 10 h (hour)
H3AM-@@@-A 3 --- 0.5 to 30 s 0.05 to 3 min 0.5 to 30 min 0.05 to 3 h 0.5 to 30 h
H3AM-@@@-B 6 --- 1 to 60 s 0.1 to 6 min 1 to 60 min 0.1 to 6 h 1 to 60 h
H3AM-@@@-C 12 0.2 to12 s 2 to 120 s 0.2 to 12 min 2 to 120 min 0.2 to 12 h ---
Note: Instantaneous output is obtained by turning the time setting knob below "0" until the time setting knob stops.
Rated supply voltage 100 to 240 VAC (50/60 Hz)
Operating voltage range 85% to 110% of rated supply voltage
Power reset (-NS) Minimum power-opening time: 0.5 s
Reset input time (-NSR) Minimum input time: 0.5 s
Reset voltage range (-NSR) H level: 85 to 264 VAC
L level: 0 to 10 VAC
Power consumption Approx. 9 VA (Approx. 5 W)
Control output Contact output: 5 A at 250 VAC, resistive load (cosφ = 1)
Ambient temperature Operating: –10°C to 55°C (with no icing)
Storage: –25°C to 65°C (with no icing)
Ambient humidity Operating: 35% to 85%
Note: The minimum applicable load:
H3AM-NS: 10 mA at 5 VDC (failure level: P, reference value)
H3AM-NSR: 100 mA at 5 VDC (failure level: P, reference value)
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Accuracy of operating time ±0.7% FS max.
Setting error ±2% FS max.
Reset time Power reset: 0.5 s max.
Reset input time: 0.5 s max.
Influence of voltage ±1% FS max.
Influence of temperature ±2% FS max.
Insulation resistance 100 MΩ max. (at 500 VDC)
Dielectric strength 2,000 VAC (50/60 Hz) for 1 min between exposed non-current-carrying metal parts and current-carrying metal parts
2,000 VAC (50/60 Hz) for 1 min between the operating circuit and control output terminals
1,000 VAC (50/60 Hz) for 1 min between the operating power supply circuit and reset input circuit (H3AM-NSR only)
1,000 VAC (50/60 Hz) for 1 min between contacts not located next to each other
2,000 VAC (50/60 Hz) for 1 min between contacts of opposite poles
Impulse withstand voltage 3 kV between power terminals
4.5 kV between exposed non-current-carrying metal parts and current-carrying metal parts
Noise immunity ±1.5 kV (between power terminals) square-wave noise by a noise simulator
(pulse width: 100 ns/1 μs, 1-ns rise)
Static immunity Malfunction: 8 kV
Destruction: 15 kV
Vibration resistance Destruction: 10 to 55 Hz, 0.75-mm single amplitude for 2 cycles each in 3 directions (8 min per cycle)
Malfunction: 10 to 55 Hz, 0.5-mm single amplitude for 2 cycles each in 3 directions (8 min per cycle)
Shock resistance Destruction: 300 m/s2 3 times each in 6 directions
Malfunction: 150 m/s2 (100 m/s2 in the front/back direction) 3 times each in 6 directions
Life expectancy Mechanical: 5,000,000 times min. (under no load at 1,800 times/h)
Electrical: 100,000 times min. (5-A at 250 VAC, resistive load at 1,800 times/h)
Motor life expectancy 20,000 h
EMC (EMI): EN61812-1
Emission Enclosure: EN55011 class A
Emission AC Mains: EN55011 class A
Immunity ESD: IEC61000-4-2: 6 kV contact discharge
8 kV air discharge
Immunity RF-interference: IEC61000-4-3: 10 V/m (Amplitude-modulated, 80 MHz to 1 GHz)
10 V/m (Pulse-modulated, 900 MHz±5 MHz)
Immunity Power Frequency Magnetic Fields: IEC61000-4-8: 30 A/m (50 Hz)
Immunity Conducted Disturbance: IEC61000-4-6: 10 V (0.15 to 80 MHz)
Immunity Burst: IEC61000-4-4: 2 kV power-line
2 kV I/O signal-line
Immunity Surge: IEC61000-4-5: 1 kV line to line
2 kV line to ground
Enclosure rating IP65 (front panel only) (See note.) IP20 (terminal section)
Weight Approx. 350 g
Note: A separately sold waterproof packing (Y92S-35) is necessary to ensure IP65 waterproofing between the Timer and installation panel.
The H3AM-NS@-@-300 model with waterproof packing is available.
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Time setting knob (set time)
Moving Pointer (green): Setting pointer (orange)
Displays remaining time. Displays set value.
Power Indicator Output Indicator (orange)
(green) Time Unit Indicator
Note: The scale goes up to "3" with the H3AM-@-A and up to "6" with the H3AM-@-B.
Instantaneous or Time Unit Selector
Time-limit Output Selector for
R2 Relay: (only for H3AM-NS-@
Default setting is time-limit output. Applicable Time Unit
Full Applicable time unit
Model scale s 10 s min 10 min h 10 h
(Illustrated Model: H3AM-@@@-C) H3AM-@@@-A 3 No Yes Yes Yes Yes Yes
H3AM-@@@-B 6 No Yes Yes Yes Yes Yes
H3AM-@@@-C 12 Yes Yes Yes Yes Yes No
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■ Timing Charts
t Rt t
Power supply (1-2)
Time-limit contact NC (3-4, 7-8) (See note 1.)
Time-limit contact NO (3-5, 6-8) (See note 1.)
Instantaneous contact NC (7-8) (See note 1.)
Instantaneous contact NO (6-8) (See note 1.)
Power indicator (POWER)
Output indicator (UP)
Note: 1. The R2 contacts (7-8 and 6-8) are programmable and can be set to either instantaneous or time-limit
contacts using the switch located on the bottom of the Timer.
2. Rt is the reset time and t is the set time.
RRtt'' tt RRtt'' tt++tt''
PPoowweerr ssuuppppllyy ((11--22))
TTiimmee--lliimmiitt ccoonnttaacctt NNCC ((33--44))
TTiimmee--lliimmiitt ccoonnttaacctt NNOO ((33--55))
IInnssttaannttaanneeoouuss ccoonnttaacctt NNCC ((77--88))
IInnssttaannttaanneeoouuss ccoonnttaacctt NNOO ((66--88))
PPoowweerr iinnddiiccaattoorr ((PPOOWWEERR))
OOuuttppuutt iinnddiiccaattoorr ((UUPP))
Note: t is the set time, Rt’ is the reset application time, and t’ is the power interruption time.
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Note: All units are in millimeters unless otherwise indicated.
H3AM (Flush Mounting)
33 85 Mounting Holes
96 17.7 17.5 20.1 70
Four, 5-dia. holes
96 27.5 dia. 77.5 dia. 46 70 70±0.4
Four, M4x17.5 screw boss 70±0.4
Note: Tightening torque for panel mounting is as follows:
300 m N·m ±50 m N·m
■ Accessories (Order Separately)
(Provided with H3AM-NS@-@-300 models.)
Note: Use Waterproof Packing to provide a level of water protection
that complies with IP65 standards.
Depending on the operating environment, the Waterproof
Packing may deteriorate, contract, or harden and so regular
replacement is recommended.
■ Internal Connections and Terminal Arrangement
Power 1 6
Supply 2 7
2 7 3 8
3 8 4 R1 R2 9
4 9 5 10
R1 R2 Reset
5 (See note) 10
Use the same power source for the power supply and
reset input and wire the circuit so that the terminals (1)
and (10) terminals (2) and (9) become the same phase
Note: The R2 relay can be switched between instantaneous and time-limit contacts and thus the contact symbol is shown as follows:
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■ Precautions for Safe Use ■ Precautions for Correct Use
Observe the following items to ensure the safe use of this product. Changing Switch Settings
Environmental Precautions Be sure to adjust the time unit selector and instantaneous or time-
• Store the H3AM within the specified ratings. If the H3AM has been limit output selector for R2 relay only before the Timer is turned ON,
stored at temperatures –10°C or lower, let it stand for 3 hours or otherwise the Timer may be damaged or malfunction.
longer at room temperature before turning ON the power supply. Be sure to set the time only when Timer has stopped, otherwise the
• Use the H3AM within the specified ratings for operating Timer may malfunction.
temperature and humidity.
• Do not operate the H3AM in locations subject to sudden or extreme Setting the Operating Time
changes in temperature, or locations where high humidity may
result in condensation. Do not turn the time setting knob beyond the permissible range. If a
• Do not use the H3AM in locations subject to vibrations or shock. precise time setting is required, check the operation of the Timer in
Extended use in such locations may result in damage due to stress. trial operation before the Timer is put in actual operation.
• Do not use the H3AM in locations subject to excessive dust, Before using the H3AM-NSR, apply voltage between terminals 9 and
corrosive gas, or direct sunlight. 10 to reset the operation.
• Install the H3AM well away from any sources of static electricity, When changing the setting time of the H3AM-NSR to a longer time
such as pipes transporting molding materials, powders, or liquids. value, be sure to apply voltage between terminals 9 and 10 during
• Do not use organic solvents (such as paint thinner or benzine), the change.
strong alkaline, or strong acids because they will damage the
external finish. Others
Usage Precautions When mounting the Timer on a panel, evenly tighten the Timer to a
• Install a switch or circuit breaker that allows the operator to specified torque. If the Timer using waterproof packing is tightened to
immediately turn OFF the power, and label it to clearly indicate its a torque other than the specified value, required waterproof
function. properties will not be achieved.
• Be sure to wire the terminals correctly. If the Timer is mounted on a control panel, dismount the Timer from
• Do not install input lines in the same duct or conduit as power the control panel or short-circuit the circuitry before carrying out a
supply or other high-voltage lines. Doing so may result in voltage withstand test between the electric circuitry and non current-
malfunction due to noise. Separate the input lines from high- carrying metal part of the machine, in order to prevent the internal
voltage lines. circuitry of the TImer from damage.
• Internal elements may be destroyed if a voltage outside the rated The internal elements may be damaged if a voltage other than the
voltage is applied. rated supply voltage is applied.
• Maintain voltage fluctuations in the power supply within the ■ Precautions for EN61812-1
• Use a switch, relay, or other contact so that the rated power supply Conformance
voltage will be reached within 0.1 s. If the power supply voltage is
not reached quickly enough, the H3AM may malfunction or outputs The H3AM as a built-in timer conforms to EN61812-1 provided that
may be unstable. the following conditions are satisfied:
The output section of the H3AM is provided only with basic isolation.
The H3AM itself is designed according to the following:
• Overvoltage category III
• Pollution degree 2
On the above basis:
Operation parts on the front and bottom: Reinforced isolation
With clearance of 5.5 mm and creepage distance of 5.5 mm at 240
Output: Basic isolation
With clearance of 3.0 mm and creepage distance of 3.0 mm at 240
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
In the interest of product improvement, specifications are subject to change without notice.
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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
Warranty and Limitations of Liability
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
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.
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.
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 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.
OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.
COPYRIGHT AND COPY PERMISSION
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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
catalog in any manner, for any other purpose. If copying or transmitting this catalog to another, please copy or transmit it in its entirety.
OMRON Corporation In the interest of product improvement, specifications are subject to change without notice.
Industrial Automation Company
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