On-Delay Time Delay Relays – Power-On Delay for Industrial Control
On-Delay Time Delay Relays
On-Delay Time Delay Relays are industrial timers that introduce a precise delay before activating an output after power or trigger input is applied. Commonly used to prevent inrush current, stagger equipment start-up, or ensure safe sequencing, they form one of the most fundamental timing functions in automation and control panels.
🔧 Technical Highlights:
- Operating Principle: Output is energised after the preset delay period once control voltage or trigger input is applied.
- Supply Range: Wide 12–240 V AC/DC universal input versions for flexible installation.
- Time Ranges: Adjustable from milliseconds to hours; fine and coarse ranges selectable.
- Outputs: SPCO or DPCO relay contacts; solid-state outputs available for long life and silent operation.
- Accuracy: High repeatability and low drift across temperature ranges.
- Mounting: DIN rail or panel mount with compact housings for OEM and retrofit use.
- Status Indication: LED indicators for power, timing, and output status.
- Certifications: CE and RoHS; selected models UL/CSA approved.
✅ Benefits:
- Prevents simultaneous inrush by staggering motor or heater start-up.
- Ensures safe start sequences in machinery and conveyors.
- Universal supply simplifies global application and stock management.
- High precision and robust relay contacts enhance reliability.
- Simple installation and clear indication for quick commissioning.
🚀 Applications:
- Sequential motor control and process start-up delay.
- Compressor and pump protection against short cycling.
- Lighting and heating load soft-start sequencing.
- Delay-on energise control for valves, contactors, or PLC circuits.
- General industrial automation requiring timed activation after trigger.
On-delay timers provide reliable time-delayed energisation for smooth, safe, and coordinated equipment operation across automation and panel control systems.
Related Timing Categories
FAQs
- Q: What does an on-delay timer do?
A: It delays activation of the output for a set period after the input signal or power is applied.
- Q: How do I set the timing range?
A: Adjust the dial or digital selector on the front panel to set the desired delay. Most models provide multiple range scales from milliseconds to hours.