VIOX FCT18-AcR Asymmetrical Flashing Timer Relay

Industry-Leading Asymmetrical Cycle Timer for Industrial Automation

The VIOX FCT18-AcR is a professional-grade asymmetrical flashing timer relay designed for applications requiring precise timing control with different ON and OFF intervals. Engineered for reliability in industrial environments, this DIN rail mounted relay provides exceptional timing accuracy and versatility across an extensive range of timing settings.

What is an Asymmetrical Flashing Timer Relay?

An asymmetrical flashing timer relay enables precise control of timing sequences where different ON and OFF durations are required. Unlike standard timer relays, the FCT18-AcR allows independent adjustment of both T1 (first period) and T2 (second period) timing intervals, providing exceptional flexibility for complex automation requirements. This asymmetrical cycling capability is ideal for applications that need variable duty cycles rather than simple on/off patterns.

Key Features of the FCT18-AcR Asymmetrical Flashing Timer Relay

• Extensive Time Range: Adjustable from just 0.1 seconds to 100 days, covering virtually all industrial timing requirements
• Versatile Power Supply: Wide operating range from 12V to 240V AC/DC, eliminating the need for multiple relay variants
• Exceptional Accuracy: Time error less than 0.5%, with time deviation of only 0.1% and repeat accuracy of 0.5%
• Superior Noise Immunity: Strong anti-interference capability for reliable operation in electrically noisy environments
• User-Friendly Setup: Easy configuration with clear wiring diagrams provided on the product
• Comprehensive Visual Indicators: Green LED for supply indication and red LED for relay status
• Multiple Contact Options: Available with either 1 or 2 SPDT contacts
• Industrial-Grade Durability: 10⁷ mechanical operations and 10⁵ electrical life cycles
• Wide Temperature Range: Operates reliably from -20°C to +60°C (-40°F to +85°F)

Timing Function: AcR – Repeat Cycle Starting OFF

The FCT18-AcR operates in an asymmetrical repeat cycle mode, starting in the OFF state. When power (Un) is applied, the timing cycle begins with the relay in its OFF position. After the first time period (T1) elapses, the relay energizes for the second time period (T2). This cycle of T1 and T2 continues to repeat as long as power is maintained.

This timing function is particularly useful for applications requiring different ON and OFF periods, such as:

• Irrigation systems with different watering and drying cycles
• Industrial process control requiring asymmetrical timing
• Ventilation systems with different air exchange periods
• Traffic signal control with variable timing requirements
• Automated manufacturing equipment with asymmetrical duty cycles
• Commercial lighting systems requiring specific on/off patterns

Precision Time and Ratio Settings

The FCT18-AcR provides exceptional control over timing parameters with:

Time Range Options

The timer features 10 selectable time ranges, providing unprecedented flexibility:

• 0.1-1 second: For rapid cycling applications
• 1-10 seconds: Ideal for process automation
• 0.1-1 minute: Perfect for short-cycle industrial processes
• 1-10 minutes: Suitable for longer process control
• 0.1-1 hour: For extended operation cycles
• 1-10 hours: For long-duration equipment control
• 0.1-1 day: For daily cycling operations
• 1-10 days: For extended periodic control
• 3-30 days: For long-term timing applications
• 10-100 days: For extremely long-duration timing needs

Ratio Setting Options

The ratio setting determines the percentage relationship between the ON and OFF periods, allowing for precise control of duty cycles. The FCT18-AcR offers ratio settings from 10% to 100% in 5% increments, providing exceptional flexibility for custom timing sequences.

Versatile Wiring Options

The FCT18-AcR supports both NPN and PNP control signal configurations, making it compatible with a wide variety of industrial control systems:

NPN Configuration

• A1 terminal: DC+ / AC L
• S terminal: Signal input
• A2 terminal: DC- / AC N
• Connection terminals 11, 14, and 12 for SPDT output
• Additional terminals 21, 24, and 22 for models with 2 SPDT outputs

PNP Configuration

• A1 terminal: DC+ / AC L
• S terminal: Signal input
• A2 terminal: DC- / AC N
• Same output terminal configuration as NPN

Compact Design for Easy Integration

With compact dimensions of 90mm × 18mm × 64mm, the FCT18-AcR is designed for efficient use of DIN rail space while maintaining clear visibility of controls and indicators. The slim 18mm width allows for high-density installation in control panels where space is at a premium.

Technical Specifications

Model Selection Guide

The FCT18-AcR model numbering system follows this format: FCT18-AcR X Y Z

Dimension

Applications for Asymmetrical Flashing Timer Relays

The FCT18-AcR timer relay is ideal for applications requiring precise control of different ON and OFF timing cycles, including:

• Industrial Automation: Control of conveyors, mixers, and other equipment requiring asymmetrical duty cycles
• HVAC Systems: Fan control with different air exchange and rest periods
• Irrigation Systems: Water control with different watering and soil recovery times
• Process Control: Precise timing for manufacturing processes
• Warning Systems: Control of beacons or sirens with different active and silent periods
• Lighting Control: Architecture and display lighting with custom flash patterns
• Waste Water Treatment: Pump control with varying run and rest cycles
• Agricultural Equipment: Automated feeding and watering systems
• Traffic Management: Signal control with variable timing sequences
• Security Systems: Timed access control and monitoring cycles

Installation Guidelines

For optimal performance and longevity of the FCT18-AcR asymmetrical flashing timer relay, follow these installation guidelines:

1. Mount the relay on a standard 35mm DIN rail according to EN/IEC 60715.
2. Ensure adequate ventilation around the device, maintaining at least a 5mm gap from adjacent components.
3. Connect wiring according to the diagrams provided on the product, ensuring correct polarity for DC power supplies.
4. Use wire sizes between AWG13-20, with a maximum tightening torque of 0.4N·m.
5. Strip wire insulation to exactly 7mm for secure connections.
6. Verify that the selected voltage range matches your supply voltage.
7. For applications with electromagnetic interference, use shielded cables and appropriate grounding.
8. Maintain operating temperatures within the specified range of -20°C to +60°C.

Why Choose the VIOX FCT18-AcR Asymmetrical Flashing Timer Relay?

The FCT18-AcR stands out in the market of industrial timing relays for several key reasons:

• Exceptional Versatility: With time ranges from 0.1 seconds to 100 days and ratio settings from 10% to 100%, the FCT18-AcR can handle virtually any industrial timing application.
• Superior Precision: With time error less than 0.5% and repeat accuracy of 0.5%, this relay provides the consistent timing control required for critical industrial processes.
• Universal Voltage Compatibility: The wide 12-240V AC/DC operating range eliminates the need for multiple relay variants, simplifying inventory management.
• Industrial Durability: Designed for 10 million mechanical operations and backed by compliance with international standards, the FCT18-AcR provides exceptional reliability in demanding environments.
• Compact Design: At just 18mm wide, the relay maximizes control panel space efficiency without compromising on features or performance.
• Clear Visual Indicators: Dedicated LEDs for power and relay status provide immediate operational feedback at a glance.

Conclusion: The Professional Choice for Asymmetrical Timing Control

The VIOX FCT18-AcR asymmetrical flashing timer relay represents the ideal solution for applications requiring precise, reliable control of different ON and OFF timing periods. With its exceptional versatility, accuracy, and durability, the FCT18-AcR is the professional choice for industrial automation, process control, and equipment management applications.

Whether you need rapid cycling for manufacturing processes or extended timing for environmental control systems, the FCT18-AcR delivers consistent, dependable performance backed by industrial-grade construction and comprehensive international certifications.

Contact our technical support team today to discuss how the FCT18-AcR asymmetrical flashing timer relay can provide the precise timing control your application demands.