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Solid-state Timer

 H3FA

1

Solid-state Timer

H3FA

DIP Model Timer for PC Board Use Provides 
Contact and Solid-state Output

• Four time ranges are selectable.

Models suffixed -

@

A

@

: 1 s, 10 s, 1 min, 10 min.

Models suffixed -

@

B

@

: 6 s, 60 s, 6 min, 60 min.

• Timer operation may also be controlled through an external 

variable resistor.

• Timer can be cleaned while mounted on a PC Board with the 

sealing tape affixed.

• Twenty-four-pin IC socket can be used for mounting the Timer.

• Mountable on a 1-inch pitch rack.

(H 19.5 

×

 W 36.9 

×

 D 17.75 mm)

Model Number Structure

Note:

This model number legend includes combinations that are not available. Before ordering, please check the 

“List of Models”

 on page 2 for 

availability.

1. Time-limit contact

None: Contact outputs (SPST-NO + SPST-NC)

S: Solid-state 

outputs

2. Time range

A: 

1 s to 10 min

B: 

6 s to 60 min

3. Operation/resetting system

None: Time-limit operation/power-OFF resetting and external 

resetting, Integrating operation/power-OFF resetting and 
external resetting

U: 

Instantaneous operation, time-limit resetting/external 
resetting

4. Supply voltage

For contact output models

5DC: 

5 V DC

6DC: 

6 V DC

12DC: 

12 V DC

24DC: 

24 V DC

For solid-state output models
5/6DC: 

5/6 V DC

12/24DC:  12/24 V DC

1

2

3

4

H3FA- 

@

 

@

 

@

 

@

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

“Warranty and Application Considerations” 

on page 12 and 

“Safety Precautions” 

on page 9.

Содержание H3FA -

Страница 1: ...ng please check the List of Models on page 2 for availability 1 Time limit contact None Contact outputs SPST NO SPST NC S Solid state outputs 2 Time range A 1 s to 10 min B 6 s to 60 min 3 Operation resetting system None Time limit operation power OFF resetting and external resetting Integrating operation power OFF resetting and external resetting U Instantaneous operation time limit resetting ext...

Страница 2: ...eration time limit resetting external resetting Time limit contact Contact output SPST NO SPST NC Solid state output Contact output SPST NO SPST NC Solid state output Instantaneous contact Mounting method Surface mounting with IC socket or direct mounting on PC Board Time range 1 s to 10 min 6 s to 60 min 1 s to 10 min 6 s to 60 min 1 s to 10 min 6 s to 60 min 1 s to 10 min 6 s to 60 min Supply vo...

Страница 3: ...5 C with no icing Storage 25 C to 65 C with no icing Ambient humidity 35 to 85 X Mean X Mean value 100 20 max Where Accuracy of operating time 0 5 FS max See note 1 Setting error 0 to 30 FS max at 20 C at rated voltage Reset time 10 ms max Influence of voltage 1 FS max 2 FS max for 5 6 5 6 V DC operated models Influence of temperature 5 FS max See note 1 Insulation resistance 100 MΩ min at 500 V D...

Страница 4: ...CR oscillator circuit Counter circuit Output amplifier circuit Reset circuit Reset input Time range selector Contact output NO contact for time limit operation Contact output NC contact for time limit operation Power supply For the external resistor For the internal variable resistor Power supply circuit Voltage stabili zer circuit CR oscillator circuit Counter circuit Output amplifier circuit Res...

Страница 5: ...iew When using the 12 24 V DC operated model with a 24 V DC power supply open terminals 13 and 15 Integration Operation By opening the terminals connected to the internal variable resistor Timer operation can be interrupted to enable the Timer to perform time integration operations Interrupt Timer operation by opening terminals 21 and 22 when using the internal variable resistor or terminals 21 an...

Страница 6: ...s 1 and 24 are shorted or when terminals 13 and 15 are shorted when using a 12 24 V DC operated model with a 12 V DC power supply An output is produced immediately If the start input is applied constantly however the reset input can be applied until the set time elapses to stop time limit operation An output is produced when the start input is applied even when the constant reset input is ON prior...

Страница 7: ... operating time is slightly longer than the set time as the length of the lead increases Extending the Reset Time DIP Timers have a shorter reset time than that of conventional timers for use in solid state circuit applications To extend the reset time to that of conventional timers i e about 100 ms during operation connect the Timer to a capacitor from the table as shown in the following diagram ...

Страница 8: ...unting holes Top view Applicable Connecting Socket Standard 24 pin IC socket can be used to mount the Timer OMRON equivalent XR2A 2401 N H3FA A B H3FA SA SB Twelve 1 0 dia holes Twelve 1 0 dia holes Mounting holes Top View Applicable Connecting Socket Standard 24 pin IC socket can be used for mounting the Timer OMRON equivalent XR2A 2401 N H3FA AU BU H3FA SAU SBU ...

Страница 9: ...n the specified range Precautions for Correct Use Do not use excessive force to turn the time setting knob Otherwise it may be damaged When more precise operating time settings are required measure the operating time prior to use and adjust the time setting knob accordingly Be very careful when handling terminal leads Do not touch terminals with hands or objects that may be statically charged from...

Страница 10: ...10 Solid state Timer H3FA ...

Страница 11: ...Solid state Timer H3FA 11 ...

Страница 12: ...RANTY NEGLIGENCE OR STRICT LIABILITY In no event shall the 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 CONTAMINA...

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