The Crouse-Hinds OLC X4 Series aviation obstruction lighting controllers are designed for Class I, Division 2 hazardous locations and comply with FAA and ICAO regulations. The photocontrol assemblies ensure automatic operation by switching obstruction lights ON at dusk and OFF at dawn, making them ideal for towers, refineries, wind turbines, and industrial structures in hazardous areas.
Description
Key Features of OLC X4 Photocontrol Assemblies
✅ Automatic Light Activation – Turns obstruction lights ON in low-light conditions and OFF in daylight.
✅ Hazardous Location Rated – Certified for Class I, Division 2, Groups B, C, D.
✅ Weatherproof & Corrosion-Resistant – IP66, NEMA 4X enclosures withstand harsh conditions.
✅ FAA & ICAO Compliant – Meets FAA AC 150/5345-43J and ICAO Annex 14 regulations.
✅ Relay & Solid-State Switching – Reliable operation with low maintenance requirements.
✅ Surge Protection – Built-in safeguards against power fluctuations and lightning strikes.
✅ Easy Installation & Maintenance – ¾” NPT hubs for secure mounting and wiring.
Technical Specifications
| Feature | Specification |
|---|---|
| Operating Voltage | 120-240 VAC, 50/60 Hz (AC Models) / 24-48 VDC (DC Models) |
| Switching Levels | Red Systems: ON at 35 fc, OFF at 60 fc White/Dual Systems: ON at 2 fc, OFF at 5 fc |
| Temperature Range | -40°C to +60°C |
| Switching Delay | Test Mode: 5 seconds Normal Operation: 30 seconds |
| Contact Rating | 10A at 250V (relay), 1.5A max (solid-state) |
| Certifications | UL1598, UL844, CSA C22.2 No. 137, FAA AC 150/5345-43J |
| Enclosure Type | NEMA 4X, Class I, Div. 2 (X4 models) |
Catalog Numbers & Model Details
| Catalog Number | Description | Input Voltage |
|---|---|---|
| 70438-X2 | Photocontrol for white-only or dual red/white systems | 120-240 VAC |
| 70439-X2 | Photocontrol for red-only systems | 120-240 VAC |
| 70440-X2 | Photocontrol for white-only or dual red/white systems | 24-48 VDC |
| 70441-X2 | Photocontrol for red-only systems | 24-48 VDC |
| 70566-X2 | Photocontrol & Flasher Combo for red-only AC systems | 120-240 VAC |
| 70565-X2 | Photocontrol & Flasher Combo for red-only DC systems | 24-48 VDC |
How It Works
The OLC X4 Photocontrol Assembly continuously monitors ambient light levels. When light levels drop below the FAA-required threshold, it automatically switches ON obstruction lights. As daylight increases, the control switches the lights OFF to conserve energy.
Modes of Operation:
🔹 Standard Mode – Gradual ON/OFF switching with 30-second delay to prevent false triggers.
🔹 Test Mode – Shortens switching delay to 5 seconds for quick installation verification.
🔹 Flasher Mode (70566-X2 / 70565-X2) – Provides 30 flashes per minute for red beacon lights.
Ideal Applications for OLC X4 Photocontrol Assemblies
✔ Telecommunication Towers
✔ Oil & Gas Refineries
✔ Chemical Processing Plants
✔ Wind Turbines & Offshore Structures
✔ Airports & Military Installations
✔ Bridges & Skyscrapers
Why Choose Crouse-Hinds OLC X4 Photocontrol Assemblies?
🔹 Reliable Performance – FAA-compliant, built for extreme environments.
🔹 Energy Efficiency – Reduces power consumption and operating costs.
🔹 Reduced Maintenance – Eliminates manual switching, extending light lifespan.
🔹 Durable Construction – Designed for industrial-grade harsh conditions.
