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How to wire twin timer |
 AH3-3 delay timer and base 12-24-120-240 volt off delay timer/ 0-60 minutes Buy: 120 volt AH3-3 at Amazon Resources: How to wire AH3-3 timer How to wire H3CR timer |
 ICM 102 on-delay timer 0 Hp Must use contactor 24/ 120-240 volt AC .03-10 minutes Buy: ICM 102 Dayton off delay timers Resource: Use off delay to control motors |
 Off-delay timer/ 19-240 volt AC 15-300 seconds Buy Dayton off delay timers Resource: How to wire Dayton off delay timer |
 12-24-120-240 volt digital twin timer 1 second to 99 minutes Buy Uxcell DH48S-S twin timer Resource: DH48S twin timer manual Override air conditioner with timer |
 12-24-120-240 volt digital off delay/ twin timer or one shot timer .01 second to 99.99 hours Buy: Twin timers at Amazon Sestos twin timer Omron DH48S twin timers Resource: How to wire twin timers How to wire one-shot timers |
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Choose Cycle (twin) timer or One
shot
timer mode Input voltage from 100-240 volt. Some models, 12-24 volt AC-DC input. Choose mode between One shot or Repeat-cycle. Timer has dry NO NC terminals, so you can connect any voltage to switch terminals.  Set
Repeat
cycle or One shot ModeTo set One Shot (also called: on delay, off delay, or countdown) - Apply power to timer. Press MD for 3 seconds. Press MD to choose settings: minute, second, hour. When t,nod appears, select the 4 dashes, then press and hold MD button for 3 seconds to exit Mode. To set times, the Lock mode must be OFF. Once you exit Mode, press RES button to set time A and then press MD to set Time B. One shot mode is either On delay or Off delay depending how timer is wired. After the time period expires, the load turns OFF or ON and remains ON or OFF until you reset by momentarily connecting and then disconnecting terminals 4 and 3 with a Normally open push button, or timer, home automation, etc... or reset timer by disconnecting and reconnecting power to timer. To set Repeat cycle (this is for a blinking application on-off-on- ... or a repeating either-or application - Apply power to timer. Press MD for 3 seconds. Press MD to chose settings: minute, second, hour. When t,nod appears, select the rectangle with dashes, then press and hold MD button for 3 seconds to exit Mode. To set times, the Lock mode must be OFF. Once you exit Mode, press RES button to set time A and then press MD to set Time B. If seconds are chosen for time period A, then time period B must also be seconds. For example a car alarm is a cycle or twin timer ... honk-honk-honk indefinitely until power is cut. Christmas displays, and blinking store lights etc use twin timer in cycle mode. Timer starts when it receives power and stops when power is off. Then it restarts when power resumes. For example you can set the repeat cycle to turn on for 10 minutes and off for 99 minutes. Mode A would be 10 minutes, Mode B would be 99 minutes. Or ... turn on for 10 minutes and then turn on another circuit for 99 minutes. You can pause the timer by connecting terminals 2 and 4, or reset timer by momentarily connecting terminals 4 and 3. You can control power to the twin timer using a 7-day timer for example, or another twin timer, home automation device etc. |
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Panel mount digital twin timerPV shows the time left in the count up for Mode B... so there is .78 seconds left before it switches to Mode ASV shows 2.99 ... which is the set time I choose for Mode B When 2.99 seconds ends, Mode A set time will display. Image shows the Inkbird twin timer. Use this timer in repeat cycle mode to control red nose on Rudolph reindeer. Set Mode A to 30 seconds and Mode B for 2 seconds. Rudolph's nose will blink on and off as long as power is applied to red nose and timer. Buy: Twin timers at Amazon Sestos twin timer Omron DH48S twin timers Resource: Twin timer manual Omron twin timer manual |
 Reset circuit Do NOT apply power to terminals 1, 3, 4, 5 For Reset or Pause: ... momentarily connect terminals 2 and 5, or 3 and 5 |
Repeat cycle timer mode Incoming power line connects to terminals 9 and 10. Timer begins on-off operation when power is ON. Control heavy amp load using contactor. Poultry fan can turn ON for 20 minutes each hour. Irrigation pump can be set to run 30 seconds each hour. Ventilation fan can be turned on for 15 minute intervals Add a second timer or photo eye on incoming power line so timing function can take place during the day. Add rain sensor and relay to incoming power line so irrigation pump does not run after it rains. Buy 2-Pole 40A resistive 120Volt coil 40 amp 240Volt coil 24 volt coil Resource Contactors |
Twin timer has two time periods that can turn a load on-off, on-off,
on-off
continually until power is turned off..... or reset to start point by
momentarily connecting terminals 4 and 3. |
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 Din rail
mount H5CX-A multi-finction digital twin timertwin timer, interval 12-24-120-240 volt models Buy: H5CX-A twin timer 100-240 volt Choose H5CX-A___-N for 24 volt Resource: H5CX manual |
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 DH48S
twin timerFrom the right, the 3rd and 6th buttons on front are for selecting time in seconds, .1 sec, minutes, .1 minute, hours, .1 hour. Twin timers let you set two times. When one time is ON, the other if OFF, and then reverse. The 1st and 2nd buttons are for selecting 1-99 seconds or minutes etc of first time. The 4th and 5th buttons are for selecting 1-99 seconds or minutes etc of second time. Buy: DH48S twin timer Resource: DH48S twin timer manual DH48S manual |
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Omron
H3CR-F solid state twin timer Independent on and off set times Buy: H3CR 12-48 volt DC Omron twin timers Resource: H3CR-F manual DH48S twin timer H3CR series manual |
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Add several layers of control using twin timer, delay
timer and 24-hour or 7-day timer Image show test wiring Buy Din rails THc15 timer AH3 delay timer Indicator lights Resources: How to wire delay timer How to wire din rail timers + manuals |
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DH48S
twin timer wiring
Apply power to terminals 2 and 7 to activate repeat on-off operation of timer. Timing sequence repeats until power is off. Sequence resumes when power is applied again. Reset pause One shot Wiring can vary slightly by model Do NOT apply power to terminals 1, 3, 4 For Reset or Pause or One shot activation: momentarily connect terminals 1 and 4, or 1 and 3 |
Override
air conditioner thermostat *(or any circuit) using DH48S twin timer.Note: the illustration shows twin timer terminals on opposite side from product manual. This was done for ease of making illustration. Problem: air conditioner runs too much during peak electric prices. A programmable thermostat for the air conditioner can control peak usage by raising temperature and reducing hours of operation during peak times, but it cannot be programmed to limit actual number of run-time minutes per hour. This diagram solves problem without compromising integrity of AC motor or equipment. Steve says: I've been able to make the DH48S-S (twin timer) work pretty well for my need of limiting the run time of air conditioning compressor. My twin timer has a 24VAC coil so it I can hook it directly to the thermostat wires. Here's how I wired it up: Yellow (compressor) wire from tstat connected to terminal 7 (the 24vac coil) Tstat common wire to terminal 2 (the 24vac coil) Jumper from terminal 7 to terminal 8 (continue yellow wire to relay common) Yellow wire going to air conditioner contactor connects to terminal 5 on twin timer (relay normally closed contact) Set the time1 to 5 minutes (the "disallowed" off time") Set the time2 to 10 minutes (the "allowed but limited to x minutes" on time) So when the thermostat calls for cooling, putting 24 volt power on the yellow wire, it powers the timer and powers the relay, causing air conditioner to run for up to 10 minutes. If the thermostat stops calling before 10 minutes, the twin timer is unpowered and when it calls again, it starts in the "allowed but limited" t2 at 00 minutes, and allows it to go to 10 minutes. Beautiful! I also have a second timer that is set to the peak hours of 3 to 8 pm and it bypasses the twin timer during those times. Footnote about fuse: The illustration shown above has the timer ON during regular prices, and OFF during peak pricing. If the fuse blows out, the timer will remain OFF. This means the twin timer will be in control of the AC cycle at all times, until a repair is made. If the wiring is changed, so timer is OFF during regular price, and ON during peak, then if fuse blows, the AC will run normally even during peak pricing. To make this change in wiring, simply switch wires on terminals 3 and 5. Use a 10 amp fuse to protect timer circuit. A fuse will protect the entire length of wire and the timers. The fuses rarely if ever blow out or have a problem. Buy Uxcell DH48S-S twin timer 24 volt twin timer 24 volt din rail timer Panel mount fuse holders at Amazon Fuse blocks at Amazon Resource: DH48S twin timer manual 24 volt timers More wiring diagrams show how to override air conditioner |
 Din rail
mount DH48S digital twin timertwin timer or one-shot mode 12-24-120-240 volt models Buy: DH48S twin timer Resource: H5CX twin timer manual |
| How to wire
one-shot
timer/
identical wiring as twin timer One shot timer: when power is applied, or signal is applied to timer, the timer turns ON circuit for selected time period then turns off. One
shot
(on delay or off delay) - Set mode for one-shot: Apply
power to timer. Press
MD for 3 seconds. Press MD to choose settings: minute, second, hour.
When t,nod appears, select the 4 dashes, then press and hold MD button
for 3 seconds to exit Mode. Once you exit Mode, press RES button to set
Time A and Time B.
Once you exit Mode, press RES button to set time A and then press RES again to set Time B. If seconds are chosen for time period A, then time period B must also be seconds. One shot mode is either On delay or Off delay depending how timer is wired. After the time period expires, the load turns OFF or ON and remains ON or OFF until you reset by momentarily connecting and then disconnecting terminals 4 and 3 with a Normally open push button, or timer, home automation, etc... or reset timer by disconnecting and reconnecting power to timer. |
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 Larger image |
One shot timer application Max load on off-delay timer is 10 amp. How it works: Push doorbell button. Activates timer. Timer turns ON and begins countdown. Timer terminals 7 and 8 are ON. This causes contactor coil to energize. Circuit to recirculation pump is ON. When countdown expires, terminals 7 and 8 are OFF, contactor coil is de-energized, pump turns OFF. Twin timer can be set to one-shot mode, and with 120-240V, and operate .9 seconds to 99 hours. So the pump can run any length of time: 1 hour or 21 minites etc. Do not connect power to terminals 1 thru 5. How to wire twin timer Buy: Project materials: Twin timers at Amazon Sestos twin timer Omron DH48S twin timers Sestos relay timer Example 50' thermostat wire at Amazon Contactor with 120Volt coil At Amazon More contactor illustrations More off delay and pin timer illustrations Normally open Push button |
 Momentary contact switch Terminals 3-4 on the twin timer are for Reset. When terminals 3 and 4 are momentarily touched together using a momentary switch or a push button, it starts the recirculation pump. When the programmed time expires, the recirculation pump turns off, and the timer waits until the Reset is activated again. Do not apply power to terminals 3-4. For the reset to work, terminals 3 and 4 need to be joined or touched together and then disconnected from each other. If an ordinary on-off toggle switch is used instead of a momentary switch, the the toggle must be turned on and then off for the Reset to take place. Buy: Leviton momentary contact switch Momentary contact switches |
 
Buy Normally open push buttons at Amazon Normally open or monetary on push button Fuseholders at Amazon |
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Panel
mount
one-shot timer Precise digital control Set mode for one-shot Apply power, and normally open terminals turn ON for set time, and then remain off until power is cut and applied again. This can be operated with a Normally closed push button that applies continuous power to the timer mechanism. When the push button is pushed, it starts the delay time circuit for the set duration of time. Time durations: .01 seconds to 99hour99 minutes (4.16 days) Repeasts each time power is applied again. 1/2 Hp @ 120 Volt 3/4 Hp @ 240 V 100-240 volt AC/DC input terminals are separate from output terminals Buy: B3S one-shot timer Resource B3S timer manual Options for Motor driven countdown timer |
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Omron H3CR-A 8-pin
din-rail mount one-shot timer Select Mode J for one-shot. Select Mode A on-off delay, B2 flicker start repeat cycle twin, E interval, J one-shot Select time period in seconds, minutes, hours or 10-hour increments Select time range using rated time selector: 100,000 operation life span Buy: H3CR timer Resource H3CR series manual |
 8-pin timer base Showing example SPDT pin timer wiring NC = Normally closed NO = Normally open |
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H3CR repeat cycle twin timer, or
One-shot timer Select Mode J for one-shot Illustration shows typical 120Volt wiring.. Hot and Neutral connect to 2 and 7. Install jumper wire between 7 and 8 to put 120V to timer relay. When timer receives no power on terminals 7 and 2, then timer is OFF, then NC terminal 5 has power. When timer receives power to terminals 7 and 2, then timer is ON, and NO terminal 6 has power, and terminal 5 has no power. Complete circuit with neutrals at terminal 2 To use other terminals: Add jumper wire between 7 and 1 (or 8 and 1) Then connect load to terminals 4 or 5, with neutral connecting to terminal 2 How to wire AH3 timer |
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Recirculation systems |
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Repeated
ON
Delay using digital twin timer in cycle mode
