Timer Relays

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Timer Relays are a type of Control Relay with a time delay built in.


Timer Relay or Electromechanical Relay?


The difference between the timer relay and electromechanical relay is that when the output contacts open or close. On a conventional Control Relay, the contacts are opened or closed when a voltage is applied and removed from the coil - for timer relays, however, the contacts will open or close before or after an intentional time period. When choosing the right Timer Relay it is important to consider the right kind of delay required for your application.


What are the types of Timer Relays that I can choose from?


The most common timing function of Time Delay Relay are:


  • On Delay (Time delay starts on the application of voltage)

  • Off Delay (When a voltage is applied the relay is ready to accept a trigger)

  • Single Shot (One-shot)

  • Interval On (Interval) and Flasher (On First / Off First)

  • Repeat Cycle (When a voltage is applied the relay contacts change state and the timer starts)

When designing your application it is important to understand the difference between the particular types of the timer relays. That means to consider what should initiate the delay and whether the timing should start at the same time as the application as well as when the voltage is released.


Timer Relays are triggered/initiated by either:


  • Voltage being applied or

  • The closing or opening of a trigger signal

Trigger signals are either:


  • Control Switch ( Dry Contact) such as a limit switch, float switch or push button or

  • Voltage ( Power Trigger)

Where can I use Timer Relay?


Time Delay Relays are typically used in industrial applications and OEM equipment play an important role for many industrial processes such as small panel or sub-panels requirements.


  • Lighting circuits

  • Motor start control

  • Sensitive equipment

  • Safety control

  • Conveyor belt sequence delay
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Description Price Supply Voltage Time Range Mode of Operation Mounting Type Number of Timer Functions Number of Contacts Series Time Increment Power Supply Contact Configuration Current Maximum Terminal Type Minimum Voltage Maximum Voltage
RS Stock No. 914-5070
Mfr. Part No.RENF22R2MMW
HK$676.40
Each
units
12 → 240 V ac/dc 0.1 s → 100 h Multi Function with NFC DIN Rail Multi Function 2 Zelio Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 897-6700
Mfr. Part No.RE22R2ACMR
HK$443.22
Each
units
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s OFF Delay, ON Delay DIN Rail Multi Function 2 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 897-6738
Mfr. Part No.RE22R1QCMU
HK$454.21
Each
units
24 → 240 V ac/dc 0.05 → 300 s Star Delta DIN Rail Single 1 RE22 R1 Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 791-2723
Mfr. Part No.RE17RCMU
HK$381.05
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h OFF Delay DIN Rail Single 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 896-8698
Mfr. Part No.RE22R2KMR
HK$669.28
Each
units
24 → 240 V ac/dc 0.3 → 300 s OFF Delay DIN Rail Single 2 RE22 R2 Seconds External DPDT 5 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 897-6725
Mfr. Part No.RE22R2MYMR
HK$765.96
Each
units
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s OFF Delay, ON Delay DIN Rail Multi Function 2 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 897-6740
Mfr. Part No.RE22R2QEMR
HK$876.89
Each
units
24 → 240 V ac/dc 0.3 → 30 s Star Delta DIN Rail Single 2 RE22 R2 Seconds External DPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 914-8198
Mfr. Part No.REXL2TMB7
HK$460.91
Each
units
24 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 2 - Hours, Minutes, Seconds - - 5 A - - -
RS Stock No. 791-2711
Mfr. Part No.RE17RAMU
HK$313.08
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Delay DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 791-2727
Mfr. Part No.RE17RHMU
HK$308.75
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Pulse DIN Rail Multi Function 1 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 827-3436
Mfr. Part No.RUW101MW
HK$412.53
Each
units
- - Multi Function Plug In - - - - - - - - 24 V ac/dc 240 V ac/dc
RS Stock No. 896-8692
Mfr. Part No.RE22R1CMR
HK$541.75
Each
units
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s OFF Delay DIN Rail Single 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 914-8215
Mfr. Part No.REXL4TMF7
HK$438.85
Each
units
110 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 4 - Hours, Minutes, Seconds - - 3 A - - -
RS Stock No. 897-6722
Mfr. Part No.RE22R1MLMR
HK$812.72
Each
units
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s Asymmetrical DIN Rail Single 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 897-6728
Mfr. Part No.RE22R1MYMR
HK$669.28
Each
units
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s Dw Symmetrical with Retrigger/Restart Control Signal, Interval Delay, Interval Delay with Control Signal Off, Interval Delay with Control Signal Off and with Pause/Summation Control, Interval Delay with Pause/Summation Control Signal, Interval Delay with Retrigger/Restart Control Signal, Off Delay with Control Signal, Off Delay with Control Signal and with Pause/Summation, On Delay and Off Delay with Control Signal, Power On Delay, Power On Delay with Pause/Summation Control Signal, Power On Delay with Retrigger/Restart Control, Symmetrical, Symmetrical with Pause/Summation Control Signal DIN Rail Multi Function 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 914-8192
Mfr. Part No.REXL2TMBD
HK$453.94
Each
units
24 V dc 0.1 s → 100 h Electromechanical Plug In Multi Function 2 - Hours, Minutes, Seconds - - 5 A - - -
RS Stock No. 824-2906
Mfr. Part No.9050JCK26V20
HK$923.95
Each
units
110 V dc, 120 V ac - OFF Delay Plug In Single 4 - Minutes, Seconds External DPDT 10 A PCB Pin - 240 V ac
RS Stock No. 791-2745
Mfr. Part No.RE17RMMU
HK$440.00
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h - DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw - 24 V dc, 240 V ac
RS Stock No. 872-5811
Mfr. Part No.RE22R2MMW
HK$678.30
Each
units
12 → 240 V ac/dc 0.1 s → 100 h Multi Function DIN Rail Multi Function 4 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw - -
RS Stock No. 896-8670
Mfr. Part No.RE22R1HMR
HK$525.97
Each
units
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s Interval Delay DIN Rail Single 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc