FCT18-WgR Asymmetrical On-Delay and Off-Delay Timer Relay with Control Signal

Introduction

The VIOX FCT18-WgR is a high-precision, industrial-grade timer relay that offers both asymmetrical on-delay and off-delay switching functionality with a control signal. Designed for versatile applications across industrial automation, equipment protection, and process control systems, this DIN rail-mounted relay delivers exceptional timing accuracy and reliability in a compact package.

The FCT18-WgR stands out with its extensive time range capabilities, spanning from 0.1 seconds to 100 days, making it suitable for virtually any timing application from rapid machine cycling to long-term process monitoring. With a wide power supply compatibility (12-240 VAC/DC), this timer relay integrates seamlessly into existing electrical infrastructure without requiring additional power converters.

Key Features and Benefits

Versatile Timing Functions

The FCT18-WgR provides asymmetrical on-delay and off-delay switching triggered by rising edge signals. The timing function operates with the following sequence:

• On-Delay (T1): When the input signal (Un) is applied, the relay output (R) activates after the preset on-delay time (T1) has elapsed.
• Off-Delay (T2): When the input signal is removed, the relay output remains active for the preset off-delay time (T2) before deactivating.
• Control Signal Independence: The delay processing is not affected by fluctuations in the control signal (S) once triggered, ensuring consistent timing operations even in noisy electrical environments.

Exceptional Time Range Flexibility

The FCT18-WgR offers an unparalleled time setting range from 0.1 seconds to 100 days, with 10 distinct time ranges:

• Ultra-short intervals: 0.1-1s, 1-10s
• Medium intervals: 0.1-1m, 1-10m, 0.1-1hr, 1-10hr
• Extended intervals: 0.1-1day, 1-10day, 3-30day, 10-100day

This extensive range makes the FCT18-WgR suitable for applications requiring quick cycling or long-term monitoring without the need for multiple specialized timers.

Precision Ratio Setting

The timer features a precise ratio setting dial that allows easy adjustment of the timing percentage from 10% to 100% in 5% increments. This fine-tuning capability enables:

• Precise control over timing cycles
• Easy calibration for specific application requirements
• Visual confirmation of the current setting

Superior Accuracy and Reliability

The FCT18-WgR delivers exceptional timing precision with:

• Time deviation of just 0.1%
• Repeat accuracy of 0.5%
• Temperature coefficient of 0.05%/°C at 20°C (0.05%/°F at 68°F)

This high level of accuracy ensures consistent and reliable operation in critical timing applications where precision is paramount.

Versatile Connection Options

The FCT18-WgR supports both NPN and PNP control signal configurations:

• NPN Configuration: Suitable for sinking current applications
• PNP Configuration: Suitable for sourcing current applications

This flexibility allows the timer to interface with various control systems and sensors without requiring additional signal converters.

Robust Design for Industrial Environments

Engineered for industrial reliability, the FCT18-WgR features:

• Operating temperature range of -20°C to +60°C (-40°F to +85°F)
• DIN rail EN/IEC 60715 mounting for easy installation
• IP20 protection rating
• Pollution level 2 certification
• Mechanical and electrical life of 10^7 cycles

Clear Visual Indicators

Operation status is clearly displayed through LED indicators:

• Green LED indicates power supply
• Red LED indicates relay activation

This visual feedback simplifies troubleshooting and confirms proper operation at a glance.

Technical Specifications

General Specifications

Parameter	Specification
Model	FCT18-WgR
Function	Asymmetrical ON-delay & OFF-delay switching with control signal
Time ranges	0.1s-100days (10 selectable ranges)
Power supply range	12 to 240 VAC/DC
Dimension	90mm×18mm×64mm
Mounting	DIN rail EN/IEC 60715
Weight	Approximately 90g
Standards compliance	GB/T 14048.5, IEC60947-5-1, EN6812-1

Electrical Specifications

Parameter	FCT18-WgR1	FCT18-WgR2
Input Terminal	A1-A2	A1-A2
Voltage range	AC 230V / DC24V / AC/DC 12-240V	AC 230V / DC24V / AC/DC 12-240V
Power consumption	AC 3.5VA/ DC 2.0W	AC 3.5VA/ DC 2.0W
Voltage tolerance	-15%~+10%	-15%~+10%
Supply indication	Green LED	Green LED
Relay indication	Red LED	Red LED
Output contact	1×SPDT	2×SPDT
Rated current	1×16A	2×16A
Max cable size	AWG13-20, 0.4N·m	AWG13-20, 0.4N·m

Timing Specifications

Parameter	Specification
Time ranges	0.1s-100days
Time setting	Rotary switch
Time deviation	0.1%
Repeat accuracy	0.5%
Temperature coefficient	0.05%/°C at 20°C (0.05%/°F at 68°F)
Ratio setting	10% to 100% (in 5% increments)

Environmental Specifications

Parameter	Specification
Ambient Temperature	-20 … +60 °C (-40 … +85 °C)
IP Rating	IP20
Stripping length	7mm (0.28in)
Installed altitude	≤2200m
Pollution level	2

Model Selection Guide

The FCT18-WgR model numbering system helps you identify the specific configuration:

FCT18-WgR X Y Z

1. Function: WgR (ON-delay & OFF-delay switching)
2. Type of output: 1 (1CO contact), 2 (2CO contacts)
3. Supply voltage: A (AC230V), D (DC24V), W (AC/DC12-240V)
4. Control signal: N (NPN), P (PNP)

For example:

• FCT18-WgR1WN: Single contact, wide voltage range (12-240 VAC/DC), NPN control signal
• FCT18-WgR2DP: Dual contact, 24VDC power supply, PNP control signal

Dimension

Applications

The FCT18-WgR timer relay is ideally suited for a wide range of industrial and commercial applications:

Manufacturing Automation

• Conveyor belt control with precise start/stop delays
• Machine cycle timing for sequential operations
• Equipment warm-up and cool-down timing control

Process Control

• Chemical dosing with precise timing intervals
• Heating and cooling system cycling
• Batch processing with timed stages

Building Management

• HVAC system timing control
• Lighting control with customizable on/off delays
• Pump cycling for water management systems

Equipment Protection

• Motor start/stop sequencing with controlled delays
• Compressor anti-cycling protection
• Power-up sequencing for sensitive equipment

Utility Systems

• Water treatment cycling
• Irrigation timing control
• Generator start/stop sequencing

Installation and Wiring

The FCT18-WgR features simple installation with wiring diagrams printed directly on the device, making setup quick and error-free. The relay can be connected in either NPN or PNP configuration:

NPN Configuration

• Connect terminal A1 to positive supply (DC+/AC L)
• Connect terminal A2 to negative supply (DC-/AC N)
• Connect control signal (S) to appropriate terminal
• Connect output loads to relay contacts (terminals 11-14-21 for single output model, additional terminals for dual output model)

PNP Configuration

• Connect terminal A1 to positive supply (DC+/AC L)
• Connect terminal A2 to negative supply (DC-/AC N)
• Connect control signal (S) to appropriate terminal
• Connect output loads to relay contacts

Timing Function Details

The FCT18-WgR operates on rising edge triggering with the following sequence:

1. When input voltage (Un) is applied, the relay remains inactive.
2. When the control signal (S) is activated (rising edge):
   • The relay remains inactive during time period T1 (on-delay)
   • After T1 elapses, the relay activates
3. When the control signal (S) is deactivated:
   • The relay remains active during time period T2 (off-delay)
   • After T2 elapses, the relay deactivates

This asymmetrical timing function allows independent control of both the on-delay and off-delay periods, providing maximum flexibility for complex timing applications.

Setting Up the FCT18-WgR

Setting up the FCT18-WgR timer relay is straightforward:

1. Mount the unit on a standard DIN rail
2. Connect power and control wiring according to the wiring diagram
3. Select the appropriate time range using the rotary switch
4. Adjust the ratio setting to fine-tune the timing percentage
5. Apply power and verify operation via LED indicators

Advantages Over Competing Products

The FCT18-WgR offers several advantages that set it apart from competing timer relays:

• Expanded Time Range: With timing capabilities from 0.1 seconds to 100 days, the FCT18-WgR eliminates the need for multiple specialized timers.
• High Precision: With time deviation of just 0.1% and repeat accuracy of 0.5%, the FCT18-WgR delivers superior timing precision compared to standard industrial timers.
• Wide Voltage Range: The 12-240 VAC/DC power supply compatibility reduces inventory requirements and simplifies specification.
• Dual Model Options: Available in both single and dual contact versions to match application requirements.
• Control Signal Flexibility: Support for both NPN and PNP control signals ensures compatibility with various control systems.
• Visual Setting Indicators: Clear visual indicators for both time range and ratio settings simplify setup and verification.
• Compact Design: The slim 18mm width preserves valuable DIN rail space in control panels.

Maintenance and Troubleshooting

The FCT18-WgR is designed for maintenance-free operation throughout its service life. However, for optimal performance:

• Periodically check connections to ensure they remain tight
• Verify that the operating environment remains within specified temperature limits
• Check LED indicators to confirm proper operation

Common troubleshooting steps:

• If the green LED is off, check power supply connections
• If timing seems inaccurate, verify that the correct time range and ratio have been selected
• If the relay doesn’t trigger, check the control signal connections

Summary

The VIOX FCT18-WgR Asymmetrical on-delay and off-delay timer relay combines versatility, precision, and reliability in a compact DIN rail-mounted package. With its extensive time range capabilities, dual timing functions, and flexible control options, this timer relay is an essential component for industrial automation, process control, and equipment protection applications.

The combination of high accuracy, wide voltage range compatibility, and robust industrial design makes the FCT18-WgR an ideal choice for engineers and system integrators seeking reliable timing control across diverse applications.

For more information about the FCT18-WgR timer relay and other VIOX automation products, contact our technical support team or visit our website at viox.com.