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庫存編號 733-4962
製造零件編號H3DK-S2 AC/DC24-240
BrandOmron
HK$452.54
單位
24 → 240 V ac/dc 0.1 → 1.2 s, 1 → 12 h, 1 → 12 min, 1 → 12 s, 10 → 120 h, 10 → 120 min, 10 → 120 s, 100 → 1200 h Flicker ON Start, Interval, ON Delay, One Shot Output DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - - 5 A - - 30 V dc, 250 V ac
RS庫存編號 897-6740
製造零件編號RE22R2QEMR
HK$876.89
單位
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庫存編號 774-0317
製造零件編號88827125
BrandCrouzet
HK$411.74
單位
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Pulse Timer DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS庫存編號 365-6987
製造零件編號H3DS-ML AC/DC
BrandOmron
HK$415.91
單位
24 → 230 V ac, 24 → 48 V dc 0.1 s → 120 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay, One Shot, Signal OFF Delay, Signal ON/OFF Delay DIN Rail Multi Function 1 EF7616. Hours, Seconds External - 5 A Screw - 30 V dc, 250 V ac
RS庫存編號 896-8698
製造零件編號RE22R2KMR
HK$669.28
單位
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庫存編號 106-6239
製造零件編號H3DT-A2
BrandOmron
HK$486.87
單位
24 → 240 V ac/dc 0.1 s → 100 h ON Delay DIN Rail Single 4 H3DT - External DPDT 5 A Screw - 30 V dc, 250 V ac
RS庫存編號 185-097
製造零件編號1SVR500110R0100 - CT-AHD.22
BrandABB
HK$868.28
單位
24 → 240 V ac, 24 → 48 V dc 0.05 s → 100 h OFF Delay DIN Rail Single 2 - Hours, Seconds External DPDT 6 A - 12 V 250 V
RS庫存編號 774-0323
製造零件編號88827155
BrandCrouzet
HK$578.58
單位
24 V dc, 24 → 240 V ac 0.1 s → 100 h Asymmetrical DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS庫存編號 329-137
製造零件編號XM-S1
HK$470.29
單位
10.5 → 265 V ac/dc 0.6 → 60 min Asymmetrical Recycler with Pause Start, Asymmetrical Recycler with Pulse Start, Delay Pulse, OFF Pulse, ON Delay, ON Pulse, ON Pulse with Control Switch, One Shot Asymmetrical with Control Switch, One Shot Asymmetrical without Control Switch, Release Delay, Release True OFF Delay, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start Plug In Multi Function 1 XM-S1 Minutes External SPDT 8 A 11-Pin Connector 10.5 V ac/dc, 24 V dc 265 V ac/dc
RS庫存編號 897-6725
製造零件編號RE22R2MYMR
HK$815.67
單位
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庫存編號 160-307
製造零件編號E3ZM20 12-240V AC/DC
BrandTele
HK$512.93
單位
12 → 240 V ac/dc 50 ms → 100 h Flash Pause First, OFF Delay, ON Delay, ON Delay with Control Contact, One Shot Leading Edge Voltage Controlled, One Shot Leading Edge with Control Contact, One Shot Trailing Edge with Control Contact DIN Rail Multi Function 2 E3ZM20 Hours, Milliseconds, Minutes, Seconds External DPDT 8 A - - 250 V ac
RS庫存編號 106-6234
製造零件編號H3DT-L2
BrandOmron
HK$614.90
單位
24 → 240 V ac/dc 0.1 s → 100 h Delay ON, Delay ON/OFF, Flicker OFF Start, Flicker ON Start, Interval, One Shot DIN Rail Multi Function 4 H3DT - External DPDT 5 A Screw - 30 V dc, 250 V ac
RS庫存編號 914-8198
製造零件編號REXL2TMB7
HK$460.91
單位
24 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 2 - Hours, Minutes, Seconds - - 5 A - - -
RS庫存編號 825-4637
製造零件編號H5CN-XAN AC100-240
BrandOmron
HK$2,518.12
單位
12 → 48 V dc, 100 → 240 V ac 0.001 → 99.99 s ON Delay Flush Mount, Surface Mount Single 1 H5CN Seconds External SPDT 3 A PCB Pin 12 V dc, 100 V ac 48 V dc, 240 V ac
RS庫存編號 102-6122
BrandRS PRO
HK$291.96
單位
12 → 230 V ac/dc - - DIN Rail Multi Function - - - - SPDT - Screw - -
RS庫存編號 729-8976
製造零件編號GT5P-N10SAD24 (HK)
BrandIdec
HK$2,404.56
單位
24 V ac/dc 10 s ON Delay DIN Rail Single 8 - Seconds External - 5 A - 120 V ac 240 V ac
RS庫存編號 470-7913
製造零件編號3RP2005-1AP30
BrandSiemens
HK$819.00
單位
24 V ac/dc, 110 → 240 V ac 0.05 → 100 h, 0.05 → 100 min, 0.05 → 100 s Additive ON Delay with Auxiliary Voltage, Flash Start with Interval, OFF Delay with Auxiliary Voltage, ON Delay, ON Delay & OFF Delay with Auxiliary Voltage, Passing Break Contact with Auxiliary Voltage, Passing Make Contact, Pulse Former with Auxiliary Voltage DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 1 (dc) A, 3 (ac) A Screw - 250 V ac/dc
RS庫存編號 791-2727
製造零件編號RE17RHMU
HK$308.75
單位
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庫存編號 188-4629
製造零件編號H3CRH8LAC200240M
BrandOmron
HK$771.65
單位
200 → 240 V ac 0.05 → 12 min OFF Delay DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Minutes, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS庫存編號 221-086
製造零件編號80.11.0.240.0000
BrandFinder
HK$501.79
單位
24 → 240 V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24 h ON Delay DIN Rail Single 1 80 Series Hours, Minutes, Seconds External SPDT 16 A Screw 16.8 V ac/dc 265 V ac/dc