ABB CT-AHC.12 1SVR508110R0000 Time Relay, OFF-Delay 1C/O SPDT, 24-48VDC / 24-240VAC, 0.05s to 100h

1. Product Overview

ABB CT-AHC.12 1SVR508110R0000 is a compact single-function electronic time relay belonging to ABB proven CT-C timer series, engineered for OFF-delay (delay-on-break) timing control in general industrial automation circuits. This slim DIN rail timing module supports wide-range mixed AC/DC power input and one SPDT changeover contact output, with seven adjustable time ranges spanning 0.05 seconds up to 100 hours. The ABB CT-AHC.12 1SVR508110R0000 delivers reliable voltage-triggered timing logic, ideal for inertial motor coast-down, conveyor buffer stop, fan post-purge and sequential machine control tasks. Its ultra-narrow 17.5mm housing and screw terminal design simplify cabinet layout and field wiring, making it a flexible and cost-effective timing component for machine builders and panel integrators worldwide.

2. Complete Technical Specifications

2.1 Electrical Ratings & Timing Parameters

TheABB CT-AHC.12 1SVR508110R0000 accepts universal dual-range supply voltage: 24–240V AC and 24–48V DC, compatible with most global low-voltage control systems. It carries a single 1C/O SPDT changeover contact rated for 250V and 4A resistive load, supporting both AC and DC auxiliary circuit switching. Seven preset time ranges are selectable on the unit, covering timing intervals from 0.05s all the way to 100h, to match short pulse delay or long-duration hold applications. The control input uses non-floating voltage triggering, eliminating extra isolated signal wiring and streamlining circuit design. Rated impulse withstand voltage reaches 4kV, protecting internal circuits against transient voltage surges inside control cabinets.

2.2 OFF-Delay Operating Logic

The core function of the CT-AHC.12 1SVR508110R0000 is OFF-delay timing. When the control input signal is active, the output contact energizes immediately. Once the control input is removed, the internal timer starts counting down for the preset period. The contact only resets after the full timing cycle completes. This timing behavior differs from on-delay relays and suits applications requiring equipment to keep running for a fixed duration after a trigger signal is cut. No complex programming is needed; users adjust rotary dials on the front panel to pick time range and fine-tune setpoint, enabling fast commissioning and on-site modification of timing values.

2.3 Mechanical & Environmental Data

The ABB CT-AHC.12 1SVR508110R0000 uses a slim 17.5mm width DIN rail housing with overall dimensions of 17.5mm × 70mm × 63mm and low net weight of only 0.053kg. Standard 35mm DIN rail snap-on mounting enables fast installation and replacement without special tools. Screw-type terminals maintain stable connection under mechanical vibration. The housing holds IP50 front protection rating and IP20 terminal protection, preventing dust ingress and accidental finger contact with live terminals. Operating temperature spans -20°C to +60°C, supporting continuous operation inside standard industrial control cabinets with normal temperature fluctuation and electromagnetic interference.

3. Core Product Features & Advantages

3.1 Wide Multi-Voltage Input for Global Equipment Deployment

The ABB CT-AHC.12 1SVR508110R0000 combines AC and DC wide voltage acceptance in one single relay. Machine builders can use this same part number for projects with 24V DC, 110V AC or 230V AC control circuits. Unified part numbers reduce spare part SKU counts, simplify inventory management and cut procurement overhead for export automation equipment. This universal voltage design removes the need to stock multiple timer variants for different regional power specifications.

3.2 Broad Adjustable Timing Coverage with Simple Dial Setup

With seven selectable time ranges from 0.05s up to 100h, the CT-AHC.12 handles both rapid short-cycle delay and long hold timing requirements. Front rotary knobs provide direct, visual adjustment without software or handheld configuration tools. Field technicians can modify timing values quickly during machine commissioning or maintenance work. The wide time spectrum makes this timer flexible enough for many sequential control tasks, from brief signal hold to extended cooling or purge cycles.

3.3 Slim 17.5mm Form Factor Saves Cabinet Real Estate

The ultra-narrow body of the ABB CT-C series timer minimizes space consumption on DIN rail rails. When multiple timing relays are required in one control cabinet, the compact design keeps panel layout neat and leaves room for additional contactors, circuit breakers and I/O modules. Snap-on DIN rail mounting speeds assembly on the production line and simplifies future component swap during equipment overhaul. Screw terminals offer secure wiring for vibration-prone factory environments.

3.4 Robust Industrial Grade Construction & Versatile Integration

Built with ABB’s proven low-voltage control technology, the CT-AHC.12 1SVR508110R0000 delivers stable timing accuracy over long operating cycles. It integrates seamlessly with PLC outputs, pushbuttons, limit switches and contactor coils in conventional automation control circuits. The OFF-delay function fills unique control requirements that standard on-delay relays cannot satisfy. It complies with relevant IEC low voltage standards, suitable for OEM machine manufacturing and retrofitting of legacy production lines.

4. Industrial Application Scenarios

TheABB CT-AHC.12 1SVR508110R0000 OFF-delay time relay finds wide use in factory automation and machinery control. Common deployments include fan post-purge after equipment shutdown, inertial conveyor stop delay, motor coast-down protection, pump residual flow control and sequential signal reset logic. Packaging machines, material handling conveyors, HVAC control panels and general processing machinery often adopt this timer. OEM machine builders select this model for export-ready standard machines, while system integrators use it for upgrading older control panels to add timed sequence functions without full PLC program modification.

5. Frequently Asked Questions (FAQ)

5.1 What function does ABB CT-AHC.12 1SVR508110R0000 perform?

This unit is an OFF-delay (delay-on-break) electronic time relay. Output activates immediately when input receives power, and starts timing only after the control signal is removed; contact resets after preset time elapses.

5.2 What supply voltage does CT-AHC.12 accept?

The ABB CT-AHC.12 1SVR508110R0000 supports 24–240V AC and 24–48V DC, wide mixed AC/DC input for global control panel designs.

5.3 What contact configuration and timing range are available?

It has one 1C/O SPDT changeover contact rated at 250V 4A. Seven selectable time ranges cover 0.05 seconds up to 100 hours.

5.4 What mounting style does this timer relay use?

The CT-AHC.12 uses standard 35mm DIN rail snap-on mounting, slim 17.5mm housing with screw terminals for reliable field wiring.