ABB CT-ARS.11 – Multifunction DIN-rail Time Relay for Precise Delay, Pulse, and Interval Control

The ABB CT-ARS.11 is a compact, multifunction time relay designed for clean, dependable timing in industrial panels—think start delays to protect drives, off-delays for fan run-on, interval timing for actuators, and repeat cycles for signaling. It fits a standard 17.5 mm DIN slot and, from my experience, it’s one of those “set it once and forget it” building blocks that makes control cabinets run smoothly. You might notice that ABB’s wide supply range and intuitive front dials keep setup simple, which typically cuts commissioning time for panel shops.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week when in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express Options: FedEx, UPS, DHL

Key Features

• Multifunction timing – Supports common modes such as on-delay, off-delay (with control input), interval, pulse, and recycling (symmetrical/asymmetrical), covering most panel timing tasks.
• Wide supply range – Typically 24–240 V AC/DC (50/60 Hz), so one part number works across many builds and geographies.
• Selectable time ranges – From fractions of a second up to several days (commonly 0.05 s to 300 h), giving you fine control without extra modules.
• Compact 17.5 mm housing – Saves rail space in dense cabinets; easy to retrofit.
• 1 C/O output contact – SPDT rated for standard control loads; straightforward wiring and reliable switching.
• Front-panel dials – Clear selectors for function and range; installers typically appreciate the fast, tool-free adjustments.
• Industrial durability – Designed for harsh panel environments; works reliably across a wide ambient temperature window.

Technical Specifications

Application Fields

Typical use cases include delay-on-start for VFDs and soft starters, fan or pump run-on after stop, interval control for valves and dampers, pulse generation for counters or alarms, and recycle timing for lights or beacons. I often see it in:

• Machine building and packaging lines (sequencing and interlocks)
• HVAC panels (staggered starts, blower overrun, damper timing)
• Water & wastewater (pump stop delay, flush cycles, level control logic)
• Material handling (conveyor gap timing, diverter actuations)
• Process skids and OEM control boxes where space is tight

“We standardized on CT-ARS.11 for fan overrun and valve interval timing in our AHU panels. The universal supply saved us from stocking multiple variants, and the settings are consistent lot-to-lot.” — Controls panel builder, EU

Advantages & Value

• Reduced SKU count – One device fits a wide voltage range and multiple functions, cutting inventory and substitution risk.
• High reliability – ABB timing platform is well-proven in cabinets; fewer nuisance trips and reworks in most cases.
• Panel-friendly footprint – 17.5 mm width helps meet enclosure space targets and improves thermal airflow.
• Easy commissioning – Clear dials and markings shorten setup; techs typically don’t need special tools or software.
• Global compatibility – CE/cULus compliance and IEC standards support international machine shipments.

Installation & Maintenance

• Mounting: DIN rail (TH35). Keep devices aligned with at least minimal spacing for ventilation in warm enclosures.
• Wiring: Use ferrules for stranded conductors; follow ABB torque guidance. Route control and power separately to minimize noise.
• Environment: Operate within -20…+60 °C; avoid direct vibration and high humidity. Provide cabinet ventilation if multiple heat sources are nearby.
• Safety: Isolate power before adjustment; verify the function/range settings match the sequence logic before energizing.
• Routine checks: Periodically function-test timing accuracy in critical applications; re-tighten terminals during annual maintenance; keep vents dust-free.

Quality & Certifications

• Compliance: IEC/EN 61812-1; CE marking
• Safety approvals: cULus (UL 508) and related regional approvals (varies by batch/labeling)
• Environmental: RoHS compliant
• Manufacturer’s warranty: 12 months (we support a 365-day warranty on supply)

If you’re standardizing a control panel line-up, the CT-ARS.11 seems to be a sensible default: one relay to cover most of the timing logic you’ll need, minimal rail footprint, and a supply range that keeps procurement simple. From my experience, that combination pays back quickly in reduced panel rework and faster commissioning.