brands

attributes.Supply_Voltage

attributes.Mounting_Type

attributes.Time_Range

attributes.Mode_of_Operation

attributes.Number_of_Contacts

attributes.Number_of_Timer_Functions

attributes.Series

attributes.Contact_Configuration

attributes.Time_Increment

attributes.Power_Supply

attributes.Maximum_Current

attributes.Current_Maximum

attributes.Maximum_Voltage

attributes.Switch_Configuration

attributes.Terminal_Type

attributes.Minimum_Voltage

attributes.Width

attributes.Better_World_Product

attributes.Better_World_Verification

attributes.Depth

attributes.Length

attributes.Maximum_Operating_Temperature

attributes.Minimum_Current

ABB 1SVR Series DIN Rail Mount Timer Relay, 24V ac, 2-Contact, 0.3 → 30s, 1-Function, SPDT

ABB CT-C Series DIN Rail, Snap-On Timer Relay, 110 → 130V ac, 1-Contact, 0.1 - 10s, 1-Function, SPDT

ABB DIN Rail Mount Timer Relay, 240V, 1-Contact, 0.05 → 360000s, 1-Function, SPDT

ABB CT-C Series DIN Rail, Snap-On Timer Relay, 110 → 130V ac, 1-Contact, 0.05s, 2-Function, SPDT

ABB 1SVR Series DIN Rail Mount Timer Relay, 24V ac/dc, 1-Contact, 0.1 → 10s, 1-Function, SPDT


### What are Timer Relays?

A Timer Relay is a control relay with a time delay function built in. They serve as a combination of an electromechanical output relay and a control circuit, in which contacts can be opened or closed before or after a pre-selected timed interval. Relays can be normally open or normally closed and can be used to delay timed functions from milliseconds to hours or even days.

### 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, however, for timer relays 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 kind of delay required for your application.

### What are the Types of Timer Relays?

The most common timing function of 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 types of the Timer Delay Relays, considering what should initiate the delay and if it should start at the same time as the application, as well as when the voltage is released. More information can be found in our [Timer Relays Guide](https://uk.rs-online.com/web/generalDisplay.html?id=info/timer)

**Timer Relays are triggered/initiated by either:**

- Voltage being applied or
- The closing or opening of a trigger signal

### Applications of Timer Relays

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

Browse the broad range of Timer Relays RS have to offer and order today for fast delivery.



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