VIOX FCT18-BP Interval Timer Relay

Product Overview

The FCT18-BP interval timer relay is an advanced timing control solution designed for industrial automation systems requiring precise timing sequences. With its versatile OFF-delay function and extensive time range capabilities, this DIN rail-mounted relay provides reliable timing control across diverse applications in manufacturing, building automation, process control, and utility systems.

Engineered for durability and performance, the FCT18-BP features a robust design with strong anti-interference capabilities, making it ideal for harsh industrial environments. Its wide power supply range and simple configuration interface allow for quick deployment in various control systems.

Key Features and Benefits

• Extensive Timing Range: Offers precise timing control from as short as 0.1 seconds to as long as 100 days, providing exceptional versatility for both rapid-sequence operations and long-duration processes.
• Wide Power Supply Range: Compatible with power supplies from 12 to 240 VAC/DC, eliminating the need for separate models for different voltage systems.
• User-Friendly Configuration: Easy setup with intuitive dial controls and wiring diagrams printed directly on the product housing.
• High Precision Timing: Maintains time error less than 0.5% with temperature coefficient of just 0.05%/°C, ensuring reliable operation in temperature-varying environments.
• Strong Anti-Interference Capability: Built-in protection against electrical noise and interference, ensuring stable operation in electrically noisy industrial settings.
• Flexible Output Options: Available with single or dual SPDT contacts, supporting both 1CO and 2CO contact configurations.
• Clear Operational Status: Equipped with LED indicators (green for supply, red for relay activation) for at-a-glance operational status monitoring.
• Compact Design: Space-saving dimensions of 90mm×18mm×64mm with standard DIN rail mounting (EN/IEC 60715) for easy integration into control panels.

Technical Specifications

Model Identification System

The FCT18-Bp model naming convention follows a structured format: FCT18-Bp 1 W

Detailed Specifications

Operation and Functionality

Timing Function: Bp – OFF-delay

The FCT18-BP operates with an OFF-delay timing function, which works as follows:

• When input voltage (Un) is applied, the output relay (R) remains inactive.
• When the control input is triggered, the output relay activates immediately.
• When the control input is deactivated, the timing cycle (T) begins.
• The relay remains activated for the duration of the preset time (T).
• After time T elapses, the relay returns to its inactive state.
• If the control input is reactivated during timing, the timer resets and starts a new cycle when the control input is deactivated again.

Time Setting Configuration

The FCT18-BP offers exceptional flexibility with 10 selectable time ranges:

• 0.1-1s: For rapid cycling applications requiring sub-second precision
• 1-10s: Ideal for standard automation sequences
• 0.1-1m: Short-duration minute-range timing
• 1-10m: Medium-duration minute-range timing
• 0.1-1hr: Hour-range timing for longer processes
• 1-10hr: Extended hour-range timing
• 0.1-1day: Day-range timing for daily cycles
• 1-10day: Extended day-range timing
• 3-30day: Month-range timing
• 10-100day: Long-term timing for extended processes

Time setting is performed using the rotary dial on the front face of the relay. First, select the appropriate time range, then fine-tune the specific time value within that range using the ratio setting dial, which provides adjustment from 10% to 100% of the selected range in 5% increments.

Ratio Setting

The ratio setting dial allows for precise adjustment within the selected time range, offering settings from 10% to 100% in 5% increments (10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%). This combination of range selection and ratio setting provides exceptional precision across all timing requirements.

Installation and Wiring

The FCT18-BP features straightforward installation on standard 35mm DIN rails (EN/IEC 60715) with a compact footprint of only 90mm×18mm×64mm, making it ideal for space-constrained control panels.

Wiring Connections

The relay features clearly labeled terminals:

• A1-A2: Power supply input terminals
• 15-18/25-28: Normally open contacts
• 15-16/25-26: Normally closed contacts
• Terminal 11-21: Common terminals

Wiring should follow the diagram printed on the side of the relay housing or as shown in the product documentation. For DC power supplies, observe proper polarity when connecting to terminals A1 and A2.

Dimension

Applications

The FCT18-BP interval timer relay excels in a wide range of industrial applications:

Manufacturing Automation

• Conveyor Belt Systems: Timing control for product spacing and sequential operations
• Production Line Sequencing: Coordinating multiple machines in manufacturing processes
• Equipment Cycling: Managing duty cycles for machinery requiring intermittent operation
• Industrial Heating and Cooling: Timing control for thermal processes

Building Automation

• HVAC Control: Timing sequences for heating, ventilation, and air conditioning systems
• Lighting Control: Scheduled lighting operations and energy management
• Security Systems: Timed access control and alert mechanisms
• Pump Management: Controlling water pumps and circulation systems

Process Control

• Batch Processing: Timing control for sequential steps in chemical or food processing
• Material Handling: Coordinating movement of materials through processing stages
• Filtration Systems: Managing backwash cycles and filter operations
• Dosing Applications: Precise timing for chemical dosing or material dispensing

Utility Systems

• Generator Control: Managing startup and shutdown sequences
• Power Distribution: Timing for load shedding and power management
• Water Treatment: Controlling process timing for treatment cycles
• Irrigation Systems: Scheduling water distribution for agricultural applications

Advantages Over Competing Products

• Extended Time Range: With a range from 0.1 seconds to 100 days, the FCT18-BP offers one of the most comprehensive timing ranges in its class, eliminating the need for multiple specialized timers.
• Universal Power Supply: The wide 12-240V AC/DC power supply compatibility reduces inventory requirements and simplifies specification.
• Compact Form Factor: The slim 18mm width allows for space-efficient installation in crowded control panels.
• High Precision: With time deviation of just 0.1% and repeat accuracy of 0.5%, the FCT18-BP delivers exceptional timing precision for critical applications.
• Durability: Built for industrial environments with an operational temperature range of -20°C to +60°C and storage temperature range of -40°C to +85°C.
• Standards Compliance: Certified to GB/T 14048.5, IEC60947-5-1, and EN6812-1, ensuring global acceptability and reliability.

FAQs About the FCT18-BP Interval Timer Relay

What is the difference between an interval timer relay and a standard timer relay?

An interval timer relay like the FCT18-BP specifically manages the timing between operational states, allowing precise control over how long a device remains activated after a trigger event. The OFF-delay function keeps the output relay energized for a preset time after the control signal is removed, which is particularly useful for applications requiring continued operation after the initiating signal ends.

Can the FCT18-BP be used in outdoor applications?

The FCT18-BP has an IP20 protection rating, making it suitable for indoor installation within appropriate enclosures. For outdoor applications, the relay must be installed within a weatherproof control panel or enclosure that provides adequate protection against moisture, dust, and temperature extremes.

What is the expected lifespan of the FCT18-BP?

The FCT18-BP is built for long-term reliability with a mechanical life of 10 million operations and an electrical life of 100,000 operations at rated load. This translates to many years of service in most industrial applications, particularly when operated within specified electrical and environmental parameters.

How accurate is the timing function across different temperature ranges?

The FCT18-BP maintains excellent timing accuracy across its operational temperature range, with a temperature coefficient of just 0.05%/°C referenced to 20°C. This means timing precision is minimally affected by temperature fluctuations, making it reliable even in environments with variable thermal conditions.

Can the FCT18-BP be used with both AC and DC control circuits?

Yes, the FCT18-BP with the “W” voltage designation is designed to work with both AC and DC power supplies from 12V to 240V, making it exceptionally versatile for integration with various control system types without requiring separate models for different voltage systems.

Conclusion

The VIOX FCT18-BP interval timer relay represents an optimal balance of functionality, reliability, and value for industrial timing control applications. Its combination of wide timing range, flexible power options, high precision, and compact design makes it an ideal solution for manufacturing, building automation, process control, and utility systems requiring dependable timing sequences.

With straightforward installation, intuitive configuration, and durable construction, the FCT18-BP delivers consistent performance in demanding industrial environments while minimizing maintenance requirements. Whether your application demands sub-second precision or extended multi-day timing cycles, the FCT18-BP provides the versatility and reliability needed for critical operational timing control.

Note: The above information is subject to change without further notice. Always refer to the latest product documentation for the most current specifications.