VIOX FCT18-RL Alternation Timer Relay

Introduction to the FCT18-RL Alternation Relay

The VIOX FCT18-RL is a high-performance alternation timer relay designed for applications requiring precise timing control with alternating operation between two relays. This DIN rail mounted device offers exceptional versatility with its wide timing range and power supply options, making it an ideal solution for industrial automation, pump control systems, HVAC applications, and other scenarios where load balancing and equipment longevity are priorities.

Key Features and Benefits

Alternating Relay Operation

The FCT18-RL features two relays that run alternately, providing balanced operation that extends equipment life by distributing workload evenly between two connected devices. This alternating functionality is essential for maintaining reliability in critical systems where continuous operation is required.

Comprehensive Timing Range

With an impressive timing spectrum from 0.1 seconds to 100 days, the FCT18-RL offers flexibility for virtually any application timing requirement. The device provides 10 distinct time setting ranges:

• Ultra-fast response: 0.1-1 second
• Short intervals: 1-10 seconds
• Minute-based control: 0.1-1 minute, 1-10 minutes
• Hourly operation: 0.1-1 hour, 1-10 hours
• Daily cycles: 0.1-1 day, 1-10 days
• Extended periods: 3-30 days, 10-100 days

Precision Ratio Control

The ratio setting feature allows precise adjustment of the ON/OFF cycle ratio from 10% to 100% in 5% increments, enabling customized timing profiles for specific application requirements. This level of control ensures optimal performance across diverse operating conditions.

Universal Power Supply Compatibility

With a wide power supply range of AC/DC 12-240V, the FCT18-RL offers exceptional installation flexibility, eliminating the need for specific power adaptors or transformers. This universal compatibility reduces inventory requirements and simplifies specification.

High Accuracy Performance

The FCT18-RL delivers impressive timing precision with a time error of less than 0.5% and a repeat accuracy of 0.5%, ensuring consistent and reliable operation. The time deviation is maintained at an outstanding 0.1%, providing dependable performance even in demanding applications.

Enhanced Reliability Features

Built with strong anti-interference capabilities, the relay maintains stable operation even in electrically noisy environments. Its robust design offers a mechanical and electrical life of 1×10⁷ operations, ensuring long-term reliability and reduced maintenance requirements.

User-Friendly Setup

Setting up the FCT18-RL is straightforward with clearly marked terminals and accessible controls. The wiring diagrams on the side of the product further simplify installation, reducing setup time and potential errors.

Operational Status Indicators

Integrated LED indicators provide at-a-glance status monitoring:

• Green LED for power supply indication
• Red LED for relay operation status

Technical Specifications

Electrical Parameters

Parameter	Specification
Input Terminal	A1-A2
Voltage Range	AC 230V / DC 24V / AC/DC 12-240V
Power Consumption	AC 3.5VA / DC 2.0W
Voltage Tolerance	-15% ~ +10%
Supply Indication	Green LED
Relay Indication	Red LED

Timing Specifications

Parameter	Specification
Time Ranges	0.1s-100day
Time Setting	Adjustable via button
Time Deviation	0.1%
Repeat Accuracy	0.5%
Temperature Coefficient	0.05%/°C at 20°C (0.05%/°F at 68°F)

Output Specifications

Parameter	Specification
Output Contact	2×SPDT
Rated Current	2×16A
Mechanical Life	1×10⁷ operations
Electrical Life	1×10⁵ operations

Environmental and Physical Specifications

Parameter	Specification
Operating Temperature	-20 to +60°C / -40 to +85°C
Mounting	DIN rail EN/IEC 60715
IP Rating	IP20
Stripping Length	7mm (0.28in)
Installed Altitude	≤2200m
Pollution Level	2
Max Cable Size	AWG13-20 0.4N·m
Dimensions	90mm×18mm×64mm
Weight	Approximately 90g
Standards Compliance	GB/T 14048.5, IEC60947-5-1, EN6812-1

Product Variations

The VIOX FCT18-RL is available in different configurations to meet specific application requirements:

FCT18-RL 2 W

• Function (1): RL – Alternation relay
• Type of output (2): 2 – 2CO contacts
• Supply voltage (3): W – AC/DC 12-240V

Other variations may include:

• Supply voltage options: A (AC230V) or D (DC24V)
• Contact configurations

Wiring and Connection Details

The FCT18-RL features a straightforward wiring setup:

• Power supply connects to terminals A1 (DC+ / AC L) and A2 (DC- / AC N)
• Output connections at terminals 11-14, 21-24 (2 sets of SPDT contacts)
• Clear terminal markings simplify installation

Timer Function Operation

The FCT18-RL operates with a distinctive timing pattern:

• When power (Un) is applied, the first relay (11-14) activates for period T1
• After T1 elapses, the first relay deactivates for period T2
• The second relay (21-24) then activates for period T1
• This alternating pattern continues as long as power is maintained

This alternating function ensures even usage of connected equipment, significantly extending operational life and improving system reliability.

Dimension

Applications of the FCT18-RL Alternation Timer Relay

Pump Control Systems

The FCT18-RL is ideal for alternating operation between two pumps, ensuring even wear and extended equipment life. This application is critical in:

• Water supply and distribution systems
• Wastewater management
• Irrigation systems
• HVAC circulation pumps
• Condensate removal systems

HVAC Systems

In heating, ventilation, and air conditioning applications, the relay can control:

• Alternating fan operation
• Compressor cycling
• Heating element sequencing
• Ventilation system management

Industrial Automation

The precise timing capabilities make the FCT18-RL valuable for:

• Process control sequencing
• Machine cycle timing
• Conveyor system management
• Automated manufacturing processes

Building Management Systems

For building infrastructure control:

• Lighting control sequences
• Security system timing
• Access control mechanisms
• Energy management systems

Agricultural Systems

In farming and agricultural applications:

• Irrigation cycle control
• Livestock feeding systems
• Environmental control systems
• Greenhouse management

Installation Guidelines

For optimal performance of the FCT18-RL:

1. Mount securely on a standard 35mm DIN rail
2. Ensure adequate ventilation with at least 5mm clearance between devices
3. Connect power supply to terminals A1 and A2, respecting polarity where applicable
4. Wire load devices to the appropriate output terminals (11-14, 21-24)
5. Set the desired time range using the time setting dial
6. Adjust the ratio setting to achieve the required duty cycle
7. Verify operation using the LED indicators

Advantages Over Conventional Timers

The FCT18-RL offers several advantages compared to standard timing relays:

• Alternating function distributes workload evenly between two systems
• Extended equipment life through balanced operation
• Reduced maintenance costs and downtime
• Improved system reliability through redundancy
• Precise timing control across an extensive range
• Universal power supply compatibility simplifies specification and inventory

Troubleshooting Tips

If experiencing issues with the FCT18-RL:

• Verify power supply is within specified range (12-240V AC/DC)
• Check wiring connections for proper termination
• Ensure time settings are appropriate for the application
• Confirm environmental conditions are within specified parameters
• Inspect load devices for proper operation
• Observe LED indicators for operational status

Conclusion: The VIOX FCT18-RL Advantage

The VIOX FCT18-RL alternation timer relay represents a versatile and reliable solution for applications requiring precise timing control with alternating functionality. Its comprehensive features, including wide timing range, universal power supply compatibility, and high accuracy performance, make it an excellent choice for industrial, commercial, and residential applications where equipment longevity and system reliability are paramount.

With its robust construction, strong anti-interference capabilities, and user-friendly setup, the FCT18-RL offers exceptional value and performance for professionals seeking dependable alternating control solutions. Whether for pump control systems, HVAC applications, or industrial automation processes, this advanced timer relay delivers consistent, precise operation in a compact, DIN rail mounted package.

For technical support or additional information about the VIOX FCT18-RL alternation timer relay, please contact our support team or refer to the detailed documentation available on our website.

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