The Johnson Controls R310AE-2 is a current sensing switch designed to detect the presence or absence of current flow in HVAC and building automation systems. With a wide operating voltage range of 0–250 Vac/Vdc, this switch provides versatile, reliable current detection across a broad range of electrical circuits and equipment.
Current sensing switches like the R310AE-2 are essential components in commercial and residential HVAC applications, enabling control systems to verify that motors, fans, pumps, and other loads are actually running — not just energized. This helps protect equipment, trigger alarms, and confirm proper system operation without direct contact with the monitored conductor.
Key Features
- Wide voltage range: 0–250 Vac/Vdc for broad compatibility
- Non-invasive current sensing — no direct contact with monitored circuit required
- Suitable for HVAC motors, fans, pumps, and other electrical loads
- Designed for use in building automation and control systems
- Compact design for easy installation in control panels and enclosures
- Johnson Controls quality engineering for long-term reliability
Typical Applications
- Verification of fan and motor operation in air handling units
- Pump run confirmation in hydronic and chilled water systems
- Equipment status monitoring in building automation systems (BAS)
- Load monitoring and fault detection in commercial HVAC controls
Product Specifications
- Brand: Johnson Controls
- Model / SKU: R310AE-2
- Type: Current Sensing Switch
- Voltage Range: 0–250 Vac/Vdc
