CT1S90

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Time Delay Relays

Time delay relays are used to provide an automatic response to a variety of signals. They are also referred to as delay on break, on delay, off delay or time lag relays. Their primary purpose is to act as delay elements to control machinery and follow specific sequences. Time delay relays are typically used in industrial and commercial settings for such applications as:

• Control of motors, pumps, and fans
• Automatic machine sequences
• Safety equipment control
• Interlocking and sequencing of control systems
• Timing of valves
• Control of sequence of processes
• Connection of warning systems
• Multifunctional control of industrial machinery

In all of these applications, time delay relays are used to provide a controlled delay before an event occurs. The delay is provided by the relay itself, and thus the output of the relay is dependent on the selected time delay. Depending on the particular application, time delay relays can be activated by either voltage or current and can be configured for on-delay, off-delay, or both. Time delay relays can also be configured as both on-delay and off-delay relays, setting two different delays depending on the status of the input. The asymmetrical time delay relays allow for different delay times on enabling and disabling the relay.

CT1S90 Application Field and Working Principle

The CT1S90 is an adjustable time delay relay made by Omron. It can be used to reliably switch loads on and off according to a preset time delay. The CT1S90 can be used for single-shot or cyclic operation and can be configured as an on-delay, off-delay, or combination of both on-delay and off-delay relay. It also features self-restart and a time-delay range of up to 100 minutes. This device is particularly well-suited for applications in which a delayed switch-on or switch-off function is desired.

The CT1S90 is based on a solid-state timer, which means it has no moving parts, making it a reliable and durable device. It is powered by either a 24 VDC or 24 VAC supply, and provides a maximum contact rating of 5A at 250VAC. This makes it suitable for a wide range of switching applications. The time delay is adjusted using two trimpots on the side, which can be adjusted to provide any delay within the specified range. The adjustable time delay range is from 0 to 100 minutes.

The CT1S90 has two independent SPDT contacts, which can be used to switch an AC or DC loads. The contacts are rated at 5A at 250VAC and 1A at 30VDC, making them suitable for a wide range of switching applications. In addition, the device has overvoltage and overcurrent protection, which helps ensure that the contacts remain reliable. The device also has an LED indicator to provide feedback on the status of the relay.

In summary, the CT1S90 adjustable time delay relay is a reliable and versatile device that can be used to switch both AC and DC loads on and off according to a preset time delay. Its adjustable time delay range and overvoltage and overcurrent protection make it suitable for a wide range of switching applications. It is an ideal solution for applications in which a delayed switch-on or switch-off function is desired.

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