FCT18-Akr Industrial On-Delay Relay
Precision Timing Control with Retrigger Control Signal Functionality
Product Overview
The FCT18-Akr is a high-precision power on-delay relay with retrigger/restart control signal functionality. Engineered for industrial automation and control systems, it provides reliable timing control with exceptional accuracy (±0.1%) and durability. Featuring retrigger capability that allows restarting the timing cycle during operation, this relay is ideal for applications requiring dynamic control adjustments. With its compact 18mm DIN rail design and wide operating voltage range (12-240V AC/DC), the FCT18-Akr is the optimal solution for demanding industrial applications requiring precise timing control.
Key Technical Advantages
Universal Voltage Input
Operates with 12-240V AC/DC, compatible with global industrial power standards.
Extensive Timing Range
Precise timing from 0.1 seconds to 100 days for diverse industrial applications.
Ultra-Compact Design
Space-saving 18mm width (90×18×64mm) for high-density control panels.
Exceptional Accuracy
Repeat accuracy ∆< ±0.5% and Time setting accuracy ∆< ±0.1%.
Industrial Robustness
Designed for -20°C to +60°C environments with EMI resistance.
Retrigger Functionality
Control signal can restart the timing cycle at any time during operation.
High-Capacity Output
16A C/O contacts (1 or 2 sets) for industrial loads.
EMI Resistance
Strong resistance to electromagnetic interference for reliable operation in industrial environments.
Button Setting & Locking
Precision time setting via tactile buttons with locking protection to prevent accidental changes.
Industrial Application Scenarios
The FCT18-Akr on-delay relay with retrigger functionality excels in scenarios requiring dynamic timing adjustments. Below are key applications where its functionality delivers superior performance:
Equipment Cooling Systems
Maintains cooling fans or pumps for a preset period after machinery shuts down, with retrigger capability to adapt to intermittent operation patterns.
Key Benefits:
- Extends equipment lifespan by managing residual heat
- Retrigger feature adapts to intermittent operation
- Reduces energy waste vs. continuous cooling
Safety Lighting Control
Delays shutdown of emergency lighting after main power cutoff, with retrigger functionality to reset timing during brief power fluctuations.
Key Benefits:
- Ensures continuous safety lighting during transitions
- Retrigger function maintains operation during brief outages
- Compliant with industrial safety standards
Emergency Stop Sequences
Controls delayed deactivation of auxiliary systems after an emergency stop, with retrigger capability for staged shutdown sequences.
Key Benefits:
- Mitigates mechanical stress during emergency shutdowns
- Retriggering allows safe system restart without full reset
- Improves overall safety protocol compliance
Fluid System Purge Cycles
Maintains valve actuation for a set period after pump shutdown, with retrigger functionality to extend purge cycles when needed.
Key Benefits:
- Prevents fluid stagnation and system blockages
- Adapts to variable operation via retriggering
- Reduces maintenance costs from system fouling
Access Control Systems
Delays locking of industrial gates/doors after access authorization ends, with retrigger capability to extend access periods dynamically.
Key Benefits:
- Prevents entrapment during access transitions
- Retrigger feature accommodates extended access needs
- Integrates seamlessly with security systems
Automated Process Control
Coordinates staged startup of production line components with retrigger capability to adapt to process variations.
Key Benefits:
- Ensures process integrity during startup sequences
- Retrigger adapts to unexpected process variations
- Reduces downtime from sequence adjustments
Timing Sequence
Timing Operation:
1. Control signal (S) applied – timing period T starts
2. After preset time (T) – output (R) closes
3. Output (R) remains closed as long as control signal (S) is present
Retrigger Function:
During the timing period T, if the control signal (S) is cycled (removed and reapplied), the timing restarts from zero.
Wiring
Connection Guide:
Standard DIN rail mounting with screw terminals for secure industrial connections:
- A1/A2: Power supply terminals
- S: Control signal input
- 11/12/14 & 21/22/24: Output contacts (C/O)
Note: Ensure proper grounding and follow local electrical codes for installation.
Parameter Setting
Time Adjustment Protocol:
Technical Specifications
| Parameter | FCT18-Akr1 | FCT18-Akr2 |
|---|---|---|
| Input terminal | A1-A2 | |
| Voltage range | AC230V / DC24V / ACDC12-240V | |
| Voltage tolerance | -15% ~ +10% | |
| Output type | 1 C/O contact | 2 C/O contacts |
| Rated current | 1×16A | 2×16A |
| Power consumption | AC 3.5VA / DC 2.0W | |
| Time delay setting accuracy | ±0.1% of full-scale value | |
| Repeat accuracy | Δt < ±0.5% | |
| Mechanical life | 10 million operations | |
| Electrical life | 100,000 operations | |
| Ambient temperature | -20°C to +60°C | |
| Mounting | DIN rail EN/IEC 60715 | |
| IP rating | IP20 | |
| Dimensions | 90×18×64mm | |
| Standards | IEC60947-5-1, EN6812-1 | |
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