Overview
The Phoenix Contact PR2-BSC2/4X21 is a screw-connection relay base engineered for use with REL-IR industrial relays featuring 2 or 4 changeover contacts. This 2/2-level design provides proven reliability in industrial automation, switchgear, and control applications. Each relay base is DIN rail mountable on NS 35/7.5 standard enclosures and includes plug-in provisions for input/interference suppression modules to enhance EMC performance.
Key Features
- 2/2-level screw-connection relay base architecture for secure wiring
- Supports REL-IR relays with 2 or 4 changeover (CO) contacts
- Plug-in interface for optional input/interference suppression modules
- DIN rail mounting compatible with NS 35/7.5 standard enclosure rails
- Compact design optimized for space-constrained control cabinets
- Supplied as new in box (10 units per package)
Technical Specifications
- Rated Voltage: 300VAC/DC
- Rated Current: 12A
- Contact Configuration: 2 or 4 changeover contacts
- Connection Type: Screw terminals
- Design Level: 2/2-level
- Mounting Standard: NS 35/7.5 DIN rail
- Module Interface: Plug-in for input/interference suppression modules
- Manufacturer Part Number: 2833563
- Condition: New in Box
- Package Quantity: 10 units
Typical Applications
The PR2-BSC2/4X21 relay base is widely used in:
- Industrial control and automation systems
- Switchgear and motor control centers
- Plant-wide process automation and logic control
- Safety-critical switching applications
- HVAC and building management control systems
- OEM system integrations requiring standard relay interfaces
Compatibility & Replacements
Compatible With
- Phoenix Contact REL-IR industrial relay series
- REL-IR relays with 2 changeover contacts
- REL-IR relays with 4 changeover contacts
- NS 35/7.5 DIN rail standard mounting systems
- Phoenix Contact input/interference suppression modules (plug-in compatible)
Replaces / Drop-In Replacement For
The PR2-BSC2/4X21 is a screw-connection 2/2-level base. For drop-in compatibility with existing installations, verify the contact configuration (2 or 4 CO), connection type (screw vs. spring-cage), and design level required. Phoenix Contact offers related bases including the PR2-BSC3/4X21 (1/3-level design) and PR2-BSP3/4X21 (spring-cage connection) for alternative mounting requirements. Verify compatibility with your system integrator before ordering.
Works With
- Phoenix Contact REL-IR relay series (all compatible variants)
- Standard industrial automation control systems
- DIN rail-based control enclosures (NS 35/7.5 standard)
- Phoenix Contact plugin modules for electromagnetic interference suppression
- Standard PLC and hardwired logic control architectures
