Overview
Keyence SL-R11 is an intelligent safety relay controller purpose-built for the SL-C series of safety light curtains. This Type 4 safety control unit provides integrated electronics for monitoring light curtain status, processing safety inputs (E-STOP, MPCE, TEST), and controlling downstream safety devices via dual safety relay outputs. The unit operates on 24VDC Class 2 power and mounts on standard DIN rail within a control enclosure rated IP54 or better.
Key Features
- Type 4 Safety Relay: Dual FSD (Safety) relays rated AC 230V 4A / DC 30V 2A, plus auxiliary relay AC 125V 0.5A / DC 30V 2A
- Fast Response: E-STOP input response speed of 20 ms
- PNP Open-Collector Output: Maximum load current 500 mA
- DIN Rail Mount: Can be mounted on DIN rail for compact panel integration
- Integrated Safety I/O: Dual monitored safety channels, TEST input, start/restart logic
- Class 2 Power Supply: 24V DC Class 2 supply voltage with 150mA rated current
Technical Specifications
| Supply Voltage | 24VDC |
| Current Consumption | 150 mA or less |
| Output Type | PNP Open Collector |
| Max Load Current | 500 mA |
| E-STOP Response Time | 20 ms |
| Operating Temperature | 14 to 131°F (-10 to +55°C) |
| Storage Temperature | 14 to 140°F (-10 to +60°C) |
| Enclosure Rating | IP20 (install in IP54+ control panel) |
| Vibration Resistance | 10 to 55 Hz |
| Weight | 0.99 lbs (330 g) |
| Material | Polycarbonate |
| Manufacturer | Keyence Corporation, Japan |
| Safety Classification | Type 4 / SIL 3 |
Typical Applications
The SL-R11 is a special controller unit for the Safety Light Curtain SL-C Series, making it essential for:
- Machine press guarding and interlock safety systems
- Robot cell perimeter protection
- Conveyor belt safety monitoring
- Industrial access point barriers
- Assembly line hazard zone protection
- Any application requiring certified safety-rated light curtain control
Compatibility & Replacements
Compatible With
- SL-C Series Safety Light Curtains
- SL-U2 Dedicated Power Supply Unit
- 24VDC Class 2 regulated power supplies (min. 150mA)
- Standard industrial control panels (IP54 or higher enclosure)
- PLC safety modules with 24VDC relay control inputs
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. SL-R11 is a legacy model; check for functional equivalents like SL-R11E or SL-R11G variants depending on your installation requirements.
Works With
- Keyence SL-C series light curtain sensors (all variants)
- Standard 24VDC safety relay logic systems
- Hardwired E-STOP circuits and emergency stop modules
- Safety-rated auxiliary equipment controlled by relay outputs
- DIN rail-mounted control cabinets and enclosures
