FCT18-Bt Dual Output Time Relay
With Off-Delay & Instantaneous Outputs for Complex Industrial Applications
Product Overview
The FCT18-Bt is an advanced dual-output time relay featuring both off-delay and instantaneous output functionality. Designed for industrial applications requiring both immediate and delayed control actions, this relay offers unparalleled flexibility and precision. One output provides off-delay timing (similar to the FCT18-B), while the second output operates as an instantaneous relay—activating immediately upon power application and deactivating when power is removed. This dual functionality makes the FCT18-Bt ideal for complex control systems where both immediate response and delayed shutdown sequences are required.
Key Advantages
Dual Output Configuration
Combines off-delay timing with instantaneous relay output in a single compact unit.
Button Setting & Locking
Precision time setting via tactile buttons with locking protection to prevent accidental changes.
Extensive Timing Range
Off-delay output supports timing from 0.1 seconds to 100 days for versatile applications.
Independent Output Control
Two fully independent outputs: 1 off-delay + 1 instantaneous, each with 16A capacity.
Wide Voltage Input
Operates with 12-240V AC/DC, making it compatible with various industrial power systems.
High Capacity Outputs
Both outputs rated at 16A to handle demanding industrial loads.
Compact Design
Ultra-slim form factor with a width of just 18mm for space-constrained installations.
EMI Resistance
Strong resistance to electromagnetic interference for reliable operation in industrial environments.
Industrial Application Scenarios
The FCT18-Bt dual-output relay excels in scenarios requiring both immediate response and delayed shutdown sequences. Below are key applications where its dual functionality delivers superior performance:
Complex Cooling Systems
Instantaneous output activates main cooling fans immediately, while off-delay output maintains auxiliary cooling for a preset period after shutdown to handle residual heat.
Key Benefits:
- Immediate cooling upon system start
- Extended cooling after shutdown prevents overheating
- Single unit replaces multiple relays
Multi-Zone Lighting Control
Instantaneous output controls primary lighting, while off-delay output maintains safety lighting after power cutoff, ensuring safe evacuation.
Key Benefits:
- Immediate illumination in work areas
- Delayed safety lighting enhances security
- Simplified wiring with single device
Staged Machinery Shutdown
Instantaneous output controls primary functions, while off-delay output manages auxiliary systems during shutdown sequences, preventing damage from abrupt stops.
Key Benefits:
- Prevents mechanical stress during shutdown
- Ensures proper sequencing of system deactivation
- Reduces wear on mechanical components
Fluid Control Systems
Instantaneous output controls main pumps, while off-delay output operates purge valves after shutdown, clearing residual fluids to prevent corrosion.
Key Benefits:
- Immediate fluid delivery when needed
- Automatic system purging after shutdown
- Reduces maintenance requirements
Access & Security Systems
Instantaneous output controls primary access mechanisms, while off-delay output manages safety interlocks and delayed lockdown sequences.
Key Benefits:
- Immediate response to access requests
- Safety delays prevent entrapment
- Enhanced security with controlled lockdown
Automated Process Control
Instantaneous output initiates primary processes, while off-delay output coordinates secondary shutdown sequences, ensuring complete and safe process termination.
Key Benefits:
- Immediate process initiation
- Controlled, staged shutdown sequences
- Prevents material waste and equipment damage
Dual Output Timing Sequence
Instantaneous Output (R1): Activates immediately upon power application, deactivates when power is removed.
Off-Delay Output (R2): Activates immediately, but deactivates only after the preset delay period following power removal.
Time Setting
Delay Adjustment:
The off-delay period can be precisely adjusted using the button, covering a range from 0.1 seconds to 100 days.
Lock Protection: Press and hold the setting button for 3 seconds to activate lock mode, preventing accidental changes.
Wiring Diagram
Connection Guide:
Proper wiring for power input and dual outputs. Follow the diagram to ensure correct functionality of both instantaneous and off-delay outputs.
Technical Specifications
| Parameter | FCT18-Bt |
|---|---|
| Input terminal | A1-A2 |
| Voltage range | AC230V / DC24V / ACDC12-240V |
| Voltage tolerance | -15% ~ +10% |
| Output configuration | 1 Instantaneous + 1 Off-delay |
| Output type | 2 C/O contacts (16A each) |
| Rated current | 2×16A |
| Power consumption | AC 3.5VA / DC 2.0W |
| Power indication | Red LED |
| Relay indication | Green LED (illuminated when output is active) |
| Time delay setting accuracy | ±0.1% of full-scale value |
| Button setting precision | ±0.1% |
| Repeat accuracy | Δt < ±0.5% |
| Temperature coefficient | Δt < 0.06 % / °C |
| Mechanical life | 1×107 |
| Electrical life | 1×105 |
| Ambient temperature | -20°C to +60°C |
| Mounting | DIN rail EN/IEC 60715 |
| IP rating | IP20 |
| Stripping length | 7mm (0.28in) |
| Installation altitude | ≤2200m |
| Max cable size | AWG13-20 0.4N·m |
| Dimensions | 90×18×64mm |
| Weight | Approx. 90g |
| Standards | GB/T 14048.5, IEC60947-5-1, EN6812-1 |
| Lock Protection | Yes (Button lock) |
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