VIOX FCT18-BD Double Interval Timer Relay with Control Signal

Product Overview

The VIOX FCT18-BD is a versatile double interval timer relay designed for industrial automation systems requiring precise timing control. This DIN-rail mounted relay features OFF-delay functionality with both rising and falling edge triggering capabilities, making it ideal for complex sequential operations across various industrial applications. With its wide time range settings from 0.1 seconds to 100 days and robust power supply compatibility, the FCT18-BD delivers reliable performance in demanding environments.

As a key component in control systems, the FCT18-BD double interval timer relay offers engineers and technicians the flexibility needed for implementing precise timing sequences with minimal error rates. Whether you’re designing manufacturing equipment, process control systems, or automation solutions, this timer relay provides the accuracy and dependability required for mission-critical operations.

Key Features and Benefits

• Versatile Time Ranges: Exceptional flexibility with time settings spanning from 0.1 seconds to 100 days, allowing for precise control across various industrial applications
• Wide Power Supply Range: Compatible with power sources from 12 to 240 VAC/DC, eliminating the need for multiple relay types in different voltage environments
• User-Friendly Setup: Easy configuration with clear wiring diagrams printed directly on the product
• Superior Timing Accuracy: Time error less than 0.5% for precise and consistent operation
• Strong Anti-Interference Capability: Designed to maintain reliable performance even in electrically noisy industrial environments
• Dual Output Options: Available with either 1CO (single changeover) or 2CO (double changeover) contacts for versatile integration
• Visual Status Indicators: Green LED for power supply status and red LED for relay activation, providing at-a-glance operational feedback
• Compact Design: Space-saving dimensions of 90mm×18mm×64mm, ideal for installation in control cabinets
• International Compliance: Meets GB/T 14048.5, IEC60947-5-1, and EN61812-1 standards for global deployment

Understanding the FCT18-BD Timing Function

The FCT18-BD operates with an OFF-delay function that triggers on both the rising and falling edges of the control signal. When the control voltage (Un) is applied, the timing sequence begins. The relay responds to signal (S) inputs according to the pre-configured time settings, providing reliable and predictable output responses (R) with precise timing intervals marked by “T” in the timing diagram.

This dual-edge triggering capability makes the FCT18-BD particularly valuable in applications requiring sequential timing operations or safeguard processes where precise delays between operations are critical for system performance and safety.

Comprehensive Time Setting Options

The FCT18-BD offers an extensive range of time settings, enabling precise control for virtually any industrial application:

The intuitive dial-based configuration allows operators to select the appropriate time range and then fine-tune the duration using the ratio setting dial. With ratio settings ranging from 10% to 100% in 5% increments, users can achieve precise timing adjustments to meet exact application requirements.

Ratio Setting

Wiring Options and Control Signals

The FCT18-BD supports both NPN and PNP control signal types, providing compatibility with a wide range of industrial sensors and control systems. This versatility eliminates the need for additional interface components when integrating the timer relay into existing automation architectures.

NPN Configuration

In the NPN configuration, the timer relay connects to sinking-type control outputs where the control device grounds the signal line to activate the timing function. This is common in many industrial control systems and is ideal for installations where the control signal source provides a path to ground when active.

PNP Configuration

The PNP configuration works with sourcing-type control outputs where the control device provides positive voltage to activate the timing function. This configuration is widely used in modern industrial sensors and PLCs, offering excellent noise immunity in challenging environments.

Terminal connections are clearly marked with Un (control voltage), S (signal input), and output connections (OA1, OA2) for straightforward installation and reduced commissioning time.

Technical Specifications

Model Selection Guide

The FCT18-BD series follows a structured model designation system that helps identify the exact configuration needed for your application:

FCT18-BD X Y Z

For example, FCT18-BD1WN indicates a double interval timer relay with 1CO contact, AC/DC12-240V supply voltage, and NPN control signal compatibility.

Dimension

Common Applications of Double Interval Timer Relays

Manufacturing and Production Systems

• Conveyor Belt Control: Regulating the sequencing of multiple conveyor belts with precise timing for material handling
• Machine Cycle Timing: Controlling the timing between different stages of automated manufacturing processes
• Sequential Operations: Managing the sequential activation of multiple mechanisms in assembly lines
• Safety Interlocks: Implementing time-delayed safety features that prevent premature machine activation

Process Control Systems

• Chemical Processing: Timing the addition of reagents or the duration of mixing processes
• Thermal Cycling: Controlling heating and cooling cycles in industrial processes
• Batch Processing: Managing the timing between different stages of batch production
• Water Treatment: Controlling pump operation and chemical dosing with precise timing

Building Automation

• HVAC Systems: Implementing delay functions for fan control after heating/cooling cycles
• Lighting Control: Managing sequential lighting activation or timeout functions
• Irrigation Systems: Controlling watering cycles with precise timing intervals
• Security Systems: Implementing entry/exit delay functions for alarm systems

Energy Management

• Load Shedding: Sequentially disconnecting non-critical loads during peak demand periods
• Generator Control: Managing startup and shutdown sequences for backup power systems
• Power Factor Correction: Timing the connection of capacitor banks for optimal power factor
• Demand Response: Implementing timed load management for energy conservation programs

Installation and Mounting Guidelines

The FCT18-BD is designed for easy installation on standard 35mm DIN rails (EN/IEC 60715), allowing for quick setup and integration into control panels. The compact dimensions (90mm×18mm×64mm) make it ideal for installations where space is at a premium.

For optimal performance, consider the following installation guidelines:

• Maintain adequate ventilation around the device to prevent overheating
• Ensure the ambient temperature remains within the specified operating range (-20°C to +60°C)
• Install in environments with pollution level not exceeding category 2
• Mount vertically to optimize natural convection cooling
• Maintain minimum spacing from adjacent heat-generating devices
• Use appropriate wire size (AWG13-20) with recommended stripping length (7mm)
• Apply proper terminal torque (0.4N·m) to ensure secure connections

Advantages of VIOX FCT18-BD Over Standard Timer Relays

The FCT18-BD double interval timer relay offers several distinct advantages over standard single-function timer relays:

• Enhanced Flexibility: Dual-edge triggering capability (both rising and falling edge) provides greater control options compared to single-edge triggering in standard relays
• Reduced Component Count: The wide voltage range (12-240 VAC/DC) eliminates the need for multiple relay types in systems with varied power sources
• Superior Accuracy: With time deviation of just 0.1% and repeat accuracy of 0.5%, the FCT18-BD outperforms many standard timer relays
• Extended Time Ranges: The exceptional span from 0.1 seconds to 100 days eliminates the need for multiple specialized timers
• Dual Signal Compatibility: Support for both NPN and PNP control signals provides universal compatibility with industrial control systems
• Space Efficiency: The compact design delivers advanced functionality in a space-saving package, reducing control panel footprint
• Enhanced Reliability: Strong anti-interference capability ensures dependable operation in electrically noisy industrial environments

Conclusion: The VIOX Advantage in Precision Timing Control

The FCT18-BD double interval timer relay represents VIOX’s commitment to providing industrial automation solutions that combine precision, reliability, and versatility. With its comprehensive feature set, wide operating parameters, and robust construction, this timer relay is engineered to meet the demanding requirements of modern industrial applications.

Whether you’re designing new control systems or upgrading existing installations, the FCT18-BD offers the flexibility and performance needed to optimize your industrial processes. The combination of precise timing control, versatile configuration options, and industrial-grade durability makes the VIOX FCT18-BD an essential component for engineers and technicians seeking reliable timing solutions.

For more information about the FCT18-BD double interval timer relay or to discuss your specific application requirements, contact our technical support team today.