ABB 1SVR500110R0100 CT-AHD.22 OFF-Delay 2C/O 24-48VDC 24-240VAC Timer Relay

The ABB CT-AHD.22 (SKU: 1SVR500110R0100) is an OFF-delay timer relay from the CT-D series, delivering reliable time-delay switching for industrial control panel applications. Designed for versatile supply voltage ranges of 24–48V DC and 24–240V AC, the CT-AHD.22 features a 2-changeover (2C/O) contact output, making it suitable for a wide range of automation and process control tasks. Its compact 17.5 mm wide DIN rail profile ensures easy integration into space-constrained enclosures.

Technical Specifications

Certifications & Standards

• CE: Compliant with EU directives for electrical equipment
• UKCA: UK Conformity Assessed marking for Great Britain market
• cULus: Listed to UL and CSA standards for North American markets
• UL 508: Industrial control equipment standard
• CSA: Canadian Standards Association certified
• CAN/CSA C22.2 No.14: Industrial control equipment — Canadian standard
• IEC/EN 61812-1: Time relays for industrial and residential use
• IEC/EN 63000: Technical documentation for RoHS compliance assessment
• CCC: China Compulsory Certification for the Chinese market
• REACH: Compliant with EU REACH regulation on chemical substances
• RoHS: Restriction of Hazardous Substances compliant

Applications & Use Cases

• Motor control circuits requiring OFF-delay timing sequences
• HVAC and building automation systems
• Industrial conveyor and process control panels
• Machine tool interlocking and sequencing
• Pump and compressor control with delayed stop functions

Frequently Asked Questions

What does OFF-delay mean for the CT-AHD.22?
In OFF-delay mode, the output contacts remain energised for a set time period after the control input signal is removed. This allows controlled, time-based shutdown sequences in automation systems.

What supply voltages does the CT-AHD.22 accept?
The CT-AHD.22 accepts 24–48V DC and 24–240V AC, providing broad compatibility with most industrial control power supplies without requiring separate variants for AC and DC systems.

How wide is the CT-AHD.22 for DIN rail mounting?
The CT-AHD.22 has a width of 17.5 mm, fitting neatly onto standard DIN rails alongside other modular devices in compact control enclosures.