ABB CT-AHS Off-Delay Time Relay With Auxiliary Supply

The ABB CT-AHS Off-Delay Time Relay With Auxiliary Supply delivers an off-delay timing function in industrial control circuits, keeping the output energized for a timed interval after the input is de-energized. Power is drawn from the included auxiliary supply, powering the timing electronics and simplifying wiring by reducing the need for a separate control power source. The device is used in automation tasks such as sequencing and interlocking, where a defined delay after input removal ensures orderly operation of connected equipment. As a relay-based timer from ABB, it interfaces with standard relay contacts controlled by the timer to manage load switching in control systems.