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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

X

X

1

T

X

2

X

2

/b

T/a

X

1

/a

X

1

/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/

13

(c)Copyright OMRON Corporation 2008   All Rights Reserved. 

Summary of Contents for H5AN Series

Page 1: ...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 r...

Page 2: ... 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 MΩ min at 500 VDC between current carrying terminal and exposed non current carrying metal ...

Page 3: ...00 operations can be expected The minimum applicable load is 10 mA at 5 VDC P reference value Switching operations 10 3 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 http www ia omron com 3 c Cop...

Page 4: ...et 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 C The 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 duri...

Page 5: ...the one shot time The timer repeats this cycle P For 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 Q In UP mode...

Page 6: ...e 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 http www ia omron com 6 c Copyright OMRON Corporation 2008 All Rights Reserved ...

Page 7: ...etting 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 0 N DOWN display 1 F 2 C 3 R 4 K 5 P Note Sa...

Page 8: ...V 12 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 Operate...

Page 9: ...e 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 conn...

Page 10: ...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 s...

Page 11: ...iable 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 No Yes Yes Yes No No 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 po...

Page 12: ...atteries 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 http www ia omron com 12 c Copyright OMRON Corporation 200...

Page 13: ...s 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...

Page 14: ...ot 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 ...

Page 15: ...s 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...

Page 16: ... 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...

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