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Time Delay Relays

Time Delay Relays

CATEGORYPRODUCT IDCHARACTERISTICS
Time Delay RelaysClick to download the PDFFUNCTIONINPUT VOLTAGECONTACTTIMING RANGEFEATURESPACKAGE
B SeriesB Series TDRDiscontinued, no longer available.
NOTE: Technical data sheets available for reference purposes only.
SUGGESTED ALTERNATE: C SERIES
BR SeriesBR TDRDiscontinued, no longer available.
NOTE: Technical data sheets available for reference purposes only.
SUGGESTED ALTERNATE: CR SERIES
C SeriesC TDRDelay-on make / delay-on operate12
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 hybridMiniature
C10 SeriesC10 TDRDelay-on make / delay-on operate12
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 hybridOctal style
CI SeriesCI TDRInterval on or one shot12
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 analogOctal style
CIR SeriesCIR TDRTriggered interval on or one shot12
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 analogOctal style
CR SeriesCR TDRTriggered delay on release12
24
110
48
115
AC
DC
1 Form C; SPDT
1 Form A; SPST- normally open
1 Form B; SPST-normally closed
1-120 secsSolid state analogMiniature
CR10 SeriesCR10 TDRTriggered delay on release12
24
110
120
48
AC
DC
2 Form C; DPDT480-600 secs
1-120 secs
120-240 secs
240-480 secs
Solid state analogOctal style
DC10 Series DC10 TDRDelay-on make / delay-on operate12
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 digitalOctal style
DCR10DCR10 TDRTriggered delay on release12
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 digitalOctal style
DOD SeriesDOD TDRDelay-on dropout12
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 analogOctal style
G SeriesG TDRDiscontinued, no longer available.
NOTE: Technical data sheets available for reference purposes only.
SUGGESTED ALTERNATE: C10 SERIES
HDOD SeriesHDOD TDRDelay-on dropout12
24
110
120
48
DC
1 Form A; SPST- normally open1-10 mins
10-100 mins
.1-1 secs
1-10 secs
10-100 secs
CMOS digitalHockey puck
ST1 SeriesST1 TDRDelay-on make / delay-on operate12
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 stateHockey puck
ST1A SeriesST1A TDRDelay-on make / delay-on operate12
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 stateHockey puck
ST1DST1D TDRDelay-on make / delay-on operate12
24
110
120
48
AC
DC
1 Form A; SPST1-1023 secs
.2-102.3 secs
CMOS digitalHockey puck
ST2ST2 TDRInterval on or one shot12
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 digitalHockey puck
STB SeriesSTB TDRTriggered delay on release12
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 digitalHockey puck
SWDC SeriesSWDC TDRDelay-on make / delay-on operate12
24
110
120
48
AC
DC
2 Form C; DPDT.1-102 secs
1-1023 secs
10-10230 secs
CMOS digitalOctal style
SWPDC SeriesSWPDC TDRDelay-on make / delay-on operate12
24
110
120
48
AC
DC
2 Form C; DPDT.25-160 secssolid state CMOS digitalOctal style
SWRDCSWRDC DIN RAIL TDRDelay-on make / delay-on operate12
24
DC
1 Form C; SPDT
2 Form C; DPDT
.1 secs - 120 minsCMOS digitalOctal style
Din rail mountable
SWUDC SeriesSWUDC TDRDelay-on make / delay-on operate
Delay-on release
Multi-function
12
24
110
120
48
AC
DC
2 Form C; DPDT.1-77.5 secssolid state CMOS digitalOctal 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.

Contact Amperite for Your Time Delay Relay requirements

Contact us for help in deciding which relay is perfect for your application!