Time Delay Relays
CATEGORY | PRODUCT ID | CHARACTERISTICS | |||||
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Time Delay Relays | Click to download the PDF | FUNCTION | INPUT VOLTAGE | CONTACT | TIMING RANGE | FEATURES | PACKAGE |
B Series TDR | Discontinued, no longer available. NOTE: Technical data sheets available for reference purposes only. SUGGESTED ALTERNATE: C SERIES | ||||||
BR TDR | Discontinued, no longer available. NOTE: Technical data sheets available for reference purposes only. SUGGESTED ALTERNATE: CR SERIES | ||||||
C TDR | Delay-on make / delay-on operate | 12 24 110 48 115 AC DC | 1 Form C; SPDT 1 Form A; normally open 1 Form B; normally closed | .1-60 secs 120-180 secs 180-240 secs 240-300 secs 6-120 secs | solid state analog hybrid | Miniature | |
C10 TDR | Delay-on make / delay-on operate | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .1-60 secs 120-180 secs 180-240 secs 240-300 secs 300-480 secs 6-120 secs | solid state analog hybrid | Octal style | |
CI TDR | Interval on or one shot | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .1-60 secs 120-180 secs 180-240 secs 240-300 secs 300-480 secs 60-120 secs | Solid state analog | Octal style | |
CIR TDR | Triggered interval on or one shot | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .1-60 secs 120-180 secs 180-240 secs 240-300 secs 300-480 secs 60-120 secs | Solid state analog | Octal style | |
CR TDR | Triggered delay on release | 12 24 110 48 115 AC DC | 1 Form C; SPDT 1 Form A; SPST- normally open 1 Form B; SPST-normally closed | 1-120 secs | Solid state analog | Miniature | |
CR10 TDR | Triggered delay on release | 12 24 110 120 48 AC DC | 2 Form C; DPDT | 480-600 secs 1-120 secs 120-240 secs 240-480 secs | Solid state analog | Octal style | |
DC10 TDR | Delay-on make / delay-on operate | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .1-10 secs .1-6 secs 1.8-180 secs 1-60 hrs 1-60 mins 5-300 secs 1-60 secs | solid state CMOS digital | Octal style | |
DCR10 TDR | Triggered delay on release | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .6-60 secs 1.8-180 secs 1-10 mins 1-60 hrs 1-60 mins 5-300 secs 10-100 mins | solid state CMOS digital | Octal style | |
DOD TDR | Delay-on dropout | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .1-10 secs .6-60 secs 1.2-120 secs 3-300 secs | Solid state analog | Octal style | |
G TDR | Discontinued, no longer available. NOTE: Technical data sheets available for reference purposes only. SUGGESTED ALTERNATE: C10 SERIES | ||||||
HDOD TDR | Delay-on dropout | 12 24 110 120 48 DC | 1 Form A; SPST- normally open | 1-10 mins 10-100 mins .1-1 secs 1-10 secs 10-100 secs | CMOS digital | Hockey puck | |
ST1 TDR | Delay-on make / delay-on operate | 12 24 110 120 230 36 48 AC DC | 1 Form A; SPST- normally open | .1-10 hrs .2-20 secs 10-1000 secs 1-100 secs | 100% solid state | Hockey puck | |
ST1A TDR | Delay-on make / delay-on operate | 12 24 110 120 230 48 AC DC | 1 Form A; SPST- normally open | .1-10 secs .2-20 secs 10-1000 secs 1-100 secs | 100% solid state | Hockey puck | |
ST1D TDR | Delay-on make / delay-on operate | 12 24 110 120 48 AC DC | 1 Form A; SPST | 1-1023 secs .2-102.3 secs | CMOS digital | Hockey puck | |
ST2 TDR | Interval on or one shot | 12 24 110 120 230 48 AC DC | 1 Form A; SPST- normally open | .1-10 hrs .1-10 mins .1-10 secs .2-20 secs 10-1000 secs 1-100 hrs 1-100 mins 1-100 secs 10-1000 mins | solid state CMOS digital | Hockey puck | |
STB TDR | Triggered delay on release | 12 24 110 120 230 48 AC DC | 1 Form A; normally open | .1-10 hrs .1-10 mins .1-10 secs .2-20 secs 10-1000 secs 1-100 hrs 1-100 mins 1-100 secs 10-1000 mins | solid state CMOS digital | Hockey puck | |
SWDC TDR | Delay-on make / delay-on operate | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .1-102 secs 1-1023 secs 10-10230 secs | CMOS digital | Octal style | |
SWPDC TDR | Delay-on make / delay-on operate | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .25-160 secs | solid state CMOS digital | Octal style | |
SWRDC DIN RAIL TDR | Delay-on make / delay-on operate | 12 24 DC | 1 Form C; SPDT 2 Form C; DPDT | .1 secs - 120 mins | CMOS digital | Octal style Din rail mountable |
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SWUDC TDR | Delay-on make / delay-on operate Delay-on release Multi-function | 12 24 110 120 48 AC DC | 2 Form C; DPDT | .1-77.5 secs | solid state CMOS digital | Octal style |
Time Delay Relays at Amperite
Time delay relays are parts that activate a multitude of appliances, machinery, and equipment. Some of the applications include:
- motor vehicles
- furnace fans
- conveyor belts
- dispensing equipment
- warning systems
Timing relays have a built-in time-delay function. Triggered in various ways, time delay relays minimize the energy used to start large industrial machinery or can switch on and off light switches.
Time delay relays can also make sure that the different parts of a machine start separately at predetermined times, such as:
- production
- safety
Production
Time delay relays can control loads or production processes in many ways. Ex: a time delay relay can ensure that the items move from one conveyor to another to prevent a pileup.
Safety
As a safety application example, furnaces require ventilation to get rid of fumes and avoid the possibility of explosions. A time delay relay provides a scheduled window to clear noxious gases from the chamber.
Generally, a time delay relay is triggered either by opening or closing a circuit or by providing an input current. The trigger signal can be either a dry-contact control switch, such as a float switch, limit switch, or push button; or with voltage.
Functions of a Time Delay Relay
The type of time delay relay used depends on the system setup. On- and off-delay relay timers represent the most widely used time delay relays. Other types include interval-on-operate, flasher, and repeat cycle timers.
On-delay timers
Normally open, on-delay timers start timing when the input voltage (power) is applied. The output is energized at the end of the delay. Input voltage has to be removed to de-energize the output and reset the time delay relay.
Also referred to as delay-on-operate timers, they are often used for:
- Blower motors to delay the operation for a specific time period after a gas, electric, or oil heater has been turned on.
- Stagger starting times for multiple compressors or motors that are activated by the main switch. This avoids excessive surge current in the power line.
- Burglar and intrusion alarms,
- Open-door warnings,
- Power supply sequencing,
- Oven ignitor controls, and
- Fan controls.
Off-delay timers
Off-delay timers are ready to accept the trigger when the input voltage is applied. An output is energized by applying the trigger, which must be removed for the time delay to start. An output is de-energized at the end of the time delay period. If the trigger is applied during the delay, it will reset.
Off-delay timers can be used in:
- Air-conditioning systems to hold the blower motor in operation for a specific time period after the thermostat has turned the cooling compressor off.
- Operate electrical devices and motors for a specified time, such as coin-operated dryers in commercial laundries.
- Gas valve controls,
- Telephone circuit control, and
- Elevator door control.
Interval-on-operate
Also referred to as one-shot timers, the output for interval-on timers is already energized and the time delay starts when the input voltage is applied. The output is de-energized once the delay period is over. The input voltage has to be removed so that the time delay relay can be reset.
Interval-on time delay relays may be used for:
- A range of general purpose and demanding industrial and commercial applications,
- Burglar alarm systems
- Electric welding machines,
- Automotive seat belt warnings,
- Dispensing equipment, and
- Pump stations.
Flashers
When an input voltage is applied to a flasher, the contacts energize and de-energize after one another. The on-cycle and off-cycle times are the same lengths. The timer is reset by removing the voltage and then reapplying it. Flasher timers are commonly used with:
- Alarm systems
- Indicator lights
- Warning light systems
Repeat Cycle
Repeat cycle timers have two controls so that cycles are independently adjustable. These cycles will continually repeat as long as the voltage is applied to the time delay relay. Some repeat cycle timers start the off-timer first, while others begin with the on-timer. For example, they may be used in conjunction with one another to make lamps flash on and off.
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