VIOX FCT18-BcR Asymmetrical Flashing Timer Relay

Product Overview

The VIOX FCT18-BcR is an advanced asymmetrical flashing timer relay designed for industrial and commercial applications where precise timing control is essential. This versatile relay offers “starting ON” operation, making it ideal for sequential control systems, industrial automation, process control, and equipment that requires cyclical timing operations.

With its robust construction and precision engineering, the FCT18-BcR provides reliable performance in demanding environments while offering exceptional flexibility through its wide range of time settings and installation options.

Key Features and Benefits

• Extensive Time Range: Adjustable from as short as 0.1 seconds to as long as 100 days, providing exceptional versatility for various applications
• Wide Power Supply Compatibility: Operates across 12 to 240 VAC/DC, eliminating the need for multiple relay models for different voltage applications
• User-Friendly Setup: Easy configuration with clearly labeled wiring diagrams directly on the product
• High Precision: Time error less than 0.5% ensures accurate and reliable operation
• Strong Electromagnetic Compatibility: Built-in anti-interference capability to maintain stable performance in electrically noisy environments
• Repeat Cycle Starting ON (BcR): Begins its cycle with the output ON, followed by OFF periods in a continuous cycle
• Available in Multiple Configurations: Choose between single (1CO) or dual (2CO) contact options to match your application requirements

Understanding the FCT18-BcR Timing Function

The FCT18-BcR operates in a “Repeat cycle Starting ON” mode, often abbreviated as BcR. This timing function creates a continuous cycle that begins with the output in the ON state, followed by OFF periods, then repeating the pattern as long as power is supplied to the relay.

This functionality is visually represented in the timing diagram:

• Un: Supply voltage (power)
• S: Start signal
• R: Relay output

When power is applied to the relay, the output immediately turns ON for time T1, then turns OFF for time T2. This cycle continues automatically as long as power is maintained. The timing periods T1 and T2 can be independently set using the time and ratio controls on the device.

Comprehensive Time Setting Options

The FCT18-BcR features an innovative dual-control time setting system that offers unprecedented flexibility:

Time Range Selection

The primary time setting dial allows selection from 10 distinct time ranges:

• 0.1-1 second
• 1-10 seconds
• 0.1-1 minute
• 1-10 minutes
• 0.1-1 hour
• 1-10 hours
• 0.1-1 day
• 1-10 days
• 3-30 days
• 10-100 days

Ratio Setting

The secondary ratio control determines the relationship between ON time (T1) and OFF time (T2). The ratio is adjustable from 10% to 100%, offering precise control over duty cycles:

• 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%
• 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%

This dual-control system allows for extremely precise timing configurations to match your specific application requirements.

Model Selection Guide

The VIOX FCT18-BcR is available in various configurations to meet different application requirements. The model numbering system (FCT18-BcR 1 W N) provides a quick reference for the relay’s specifications:

Position	Code	Description	Options
1. Function	BcR	Repeat cycle Starting ON
2. Type of output	1 or 2	Number of output contacts	1: 1CO contact 2: 2CO contacts
3. Supply voltage	A, D, or W	Power supply options	A: AC230V D: DC24V W: AC/DC12-240V
4. Control signal	N or P	Transistor type for control	N: NPN P: PNP

Example: FCT18-BcR 1 W N specifies a repeat cycle starting ON relay with 1 CO contact, AC/DC 12-240V supply voltage, and NPN control signal.

Technical Specifications

Parameter	FCT18-BcR1	FCT18-BcR2
Input Terminal	A1-A2
Voltage range	AC 230V / DC24V / AC/DC 12-240V
Power consumption	AC 3.5VA/ DC 2.0W
Voltage tolerance	-15% ~ +10%
Supply indication	Green LED
Relay indication	Red LED
Time ranges	0.1s-100days
Time setting	Button
Time deviation	0.1%
Repeat accuracy	0.5%
Temperature coefficient	0.05%/°C, at=20°C (0.05%/°F, =68°F)
Output contact	1*SPDT	2*SPDT
Rated current	1*16A	2*16A
Mechanical life	1*107
Electrical life	1*105
Ambient Temperature	-20 … +60 °C / -40 … +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
Dimension	90mm*18mm*64mm
Weight	about 90g
Standards	GB/T 14048.5, IEC60947-5-1, EN60812-1

Wiring Options

The FCT18-BcR supports both NPN and PNP wiring configurations:

NPN Configuration:

The NPN configuration provides a switching method where the load is connected between the positive supply and the output terminal. This is commonly used in applications where the control device sinks current to ground.

• A1 (DC+ / AC L): Positive/Line connection
• S: Signal input
• A2 (DC- / AC N): Negative/Neutral connection

PNP Configuration:

The PNP configuration offers a switching method where the load is connected between the output terminal and the negative supply. This is preferred in applications where the control device sources current from the positive supply.

• A1 (DC+ / AC L): Positive/Line connection
• S: Signal input
• A2 (DC- / AC N): Negative/Neutral connection

Dimensional Information

The FCT18-BcR features a compact design for easy installation in control panels and electrical cabinets:

• Height: 90mm
• Width: 18mm
• Depth: 64mm
• Terminal hole diameter: Ø1.2

The compact 18mm width allows for efficient use of DIN rail space while providing all the functionality needed for complex timing applications.

Applications of the FCT18-BcR Asymmetrical Flashing Timer Relay

The VIOX FCT18-BcR asymmetrical flashing timer relay is ideal for a wide range of industrial and commercial applications:

Industrial Automation

• Conveyor belt control systems with intermittent operation
• Sequential machine operations requiring precise timing
• Process control systems with cyclical procedures
• Manufacturing equipment requiring regular duty cycles

Visual and Audio Signaling

• Warning lights and beacons with customizable flash patterns
• Alarm systems with distinct on/off intervals
• Emergency indicators with specific flash sequences
• Status indicators for equipment operation

HVAC and Building Systems

• Ventilation systems requiring intermittent operation
• Pump control for water circulation systems
• Heating elements with duty cycle requirements
• Energy management systems with time-based controls

Agricultural Applications

• Irrigation systems with programmable cycles
• Greenhouse climate control equipment
• Feed distribution systems with timed operations
• Livestock environmental control systems

Installation and Setup Guide

The FCT18-BcR is designed for easy installation and configuration:

Mounting

The relay is designed for standard 35mm DIN rail mounting (EN/IEC 60715), making it compatible with most industrial control cabinets and enclosures. The compact 18mm width allows for efficient use of rail space.

Time Setting Procedure

1. Select the appropriate time range using the top dial (0.1s-100days)
2. Fine-tune the timing within the selected range using the middle dial
3. Set the desired ratio between ON time (T1) and OFF time (T2) using the bottom dial (10%-100%)

Wiring

Follow the wiring diagram printed on the side of the product, connecting power to terminals A1 and A2. The output contacts are available at terminals 15-16-18 (and 25-26-28 for the 2CO model).

Operation Verification

Once powered, the green LED indicates that supply voltage is present. The red LED indicates the status of the relay output (ON when lit). Monitor these indicators to verify proper operation of the timing function.

Advantages of the FCT18-BcR Over Standard Timer Relays

The VIOX FCT18-BcR offers several advantages over basic timer relays:

Versatility

With its extensive time range from 0.1 seconds to 100 days and adjustable ratio settings, the FCT18-BcR can replace multiple specialized relays, reducing inventory requirements and simplifying maintenance.

Precision

With time deviation of just 0.1% and repeat accuracy of 0.5%, the FCT18-BcR provides exceptional timing precision for critical applications where consistent performance is essential.

Reliability

Designed for industrial environments, the relay features strong anti-interference capability and operates across a wide temperature range (-20°C to +60°C), ensuring dependable operation even in challenging conditions.

Ease of Use

The intuitive controls and clear indicators make setup and troubleshooting straightforward, reducing installation time and minimizing errors.

Why Choose VIOX for Your Timing Relay Needs

VIOX has established itself as a leading provider of industrial control solutions with a commitment to quality, innovation, and customer satisfaction. When you select the FCT18-BcR asymmetrical flashing timer relay, you’re choosing:

• Engineering Excellence: Products designed and tested to meet or exceed industry standards
• Reliability: Components built for long service life in demanding industrial environments
• Technical Support: Access to knowledgeable professionals who can assist with product selection and application questions
• Innovation: Ongoing product development to address evolving industry needs

Conclusion

The VIOX FCT18-BcR asymmetrical flashing timer relay combines versatility, precision, and reliability in a compact package. Whether your application requires short cycling measured in seconds or extended timing periods spanning days, this industrial-grade timer relay delivers consistent performance across a wide range of operating conditions.

With easy setup, multiple configuration options, and robust construction, the FCT18-BcR is an ideal solution for industrial automation, signaling systems, HVAC controls, and numerous other applications requiring precise cyclical timing.

Contact our technical support team today to discuss how the FCT18-BcR can meet your specific timing control requirements or to request additional information about our complete line of industrial control solutions.

*The above information is subject to change without further notice