Timer Relays

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. 188-4578
Mfr. Part No.H3CR-F8 AC/DC24
BrandOmron
£78.85
Each
Units
24 V ac/dc 0.05 s → 30 h Flicker OFF DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 774-0304
Mfr. Part No.88827105
BrandCrouzet
£35.50
Each
Units
24 V dc, 24 → 240 V ac 0.1 s → 100 h Asymmetrical, Interval, OFF Delay, ON Delay, ON Pulse, Symmetrical DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
£26.19
Each
Units
12 → 230 V ac/dc 0.1 s → 100 h Delay Off (DN), Delay On (DO), Delay On (DOb), Interval (IN), Interval Leading (INb), Interval Trailing (INa), Symmetrical Recycler OFF/ON (RF) DIN Rail 7 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 791-2711
Mfr. Part No.RE17RAMU
£26.10
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. 160-262
Mfr. Part No.E1ZMQ10 24-240V AC/DC
BrandTele
£24.93
Each
Units
24 → 240 V ac/dc 50 ms → 100 h Flash Pause First, OFF Delay, ON Delay, One Shot Leading Edge Voltage Controlled DIN Rail Multi Function 1 E1ZMQ10 Hours, Milliseconds, Minutes, Seconds External SPDT 8 A - - 250 V ac
RS Stock No. 828-5155
Mfr. Part No.LEDO 12-230V AC/DC
£24.19
Each
Units
12 → 230 V ac/dc 0.1 s → 100 h ON Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 113-8134
Mfr. Part No.H3CR-A AC100-240/DC100-125
BrandOmron
£52.70
Each
Units
100 → 125 V dc, 100 → 240 V ac 0.05 s → 300 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay, One Shot, Signal OFF Delay, Signal ON/OFF Delay DIN Rail, Flush Mount, Surface Mount Multi Function 2 H3CR Hours, Seconds External - 5 A 11-Pin Connector - 125 V dc, 250 V ac
RS Stock No. 446-0327
Mfr. Part No.80.01.0.240.0000
BrandFinder
£47.00
Each
Units
12 → 240 V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24 h Interval, Interval with Control Signal ON, OFF Delay with Control Signal, ON & OFF Delay with Control Signal, ON Delay, Symmetrical Flash (Starting Pulse ON) DIN Rail Multi Function 1 80 Series Hours, Minutes, Seconds External SPDT 16A Screw 250 V ac 400 V ac
RS Stock No. 308-0784
Mfr. Part No.XMW-D1
£44.01
Each
Units
10.5 → 265 V ac/dc 0 → 60 min, 0 → 60 s 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 DIN Rail Multi Function 1 XMW-D1 Seconds External SPDT 8 A Screw 10.5 V ac/dc, 24 V dc 265 V ac/dc
RS Stock No. 828-5161
Mfr. Part No.LESW 12-230V AC/DC
£26.19
Each
Units
12 → 230 V ac/dc 0.1 s → 100 h OFF Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 774-0314
Mfr. Part No.88827145
BrandCrouzet
£36.30
Each
Units
24 V dc, 24 → 240 V ac 0.1 s → 100 h Interval DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 774-0310
Mfr. Part No.88827135
BrandCrouzet
£33.36
Each
Units
24 V dc, 24 → 240 V ac 0.1 s → 100 h OFF Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 467-6869
Mfr. Part No.88886016
BrandCrouzet
£61.11
Each
Units
12 → 240 V dc, 24 → 240 V ac 0.02 → 300 h, 0.02 → 300 min, 0.02 → 300 s A, AC, B, BW, C, G, W Plug In Multi Function 2 - Hours, Minutes, Seconds External DPDT 5 A 11-Pin Connector 12 V dc, 24 V ac 240 V ac/dc
RS Stock No. 733-4953
Mfr. Part No.H3DK-S1 AC/DC24-240
BrandOmron
£28.39
Each
Units
24 → 240 V ac/dc 0.1 s → 1200 h Flicker ON Start, Interval, ON Delay, One Shot Output DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - SPDT 5 A Screw 24 V 30 V dc, 250 V ac
RS Stock No. 828-5151
Mfr. Part No.LMMT/2 12-230V AC/DC
£29.64
Each
Units
12 → 230 V ac/dc 0.1 s → 100 h Delay Off (DN), Delay On (DO), Delay On (DOb), Interval (IN), Interval Leading (INb), Interval Trailing (INa), Symmetrical Recycler OFF/ON (RF) DIN Rail 7 2 - Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 791-2723
Mfr. Part No.RE17RCMU
£30.44
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. 328-358
Mfr. Part No.H3CR-A8 AC100-240/DC100-125
BrandOmron
£52.70
Each
Units
100 → 125 V dc, 100 → 240 V ac 0.05 s → 300 h Flicker ON Start, Interval, ON Delay, One Shot DIN Rail, Flush Mount, Surface Mount Multi Function 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 125 V dc, 250 V ac
RS Stock No. 914-5070
Mfr. Part No.RENF22R2MMW
£70.00
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. 857-7139
Mfr. Part No.DMB51CM24
£65.65
Each
Units
24 V dc, 24 → 240 V ac 0.1 s → 100 h Delay On, Delay On Release, Double Interval, Interval, Interval On Trigger Open, Symmetrical Recycler Off, Symmetrical Recycler On DIN Rail Multi Function 2 - Hours, Minutes, Seconds External SPDT 5 A Screw - -
RS Stock No. 160-284
Mfr. Part No.E1ZM10 12-240V AC/DC
BrandTele
£44.43
Each
Units
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 1 E1ZM10 Hours, Milliseconds, Minutes, Seconds External SPDT 8 A - - 250 V ac
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