Description
Honeywell MCS-NO-A-50A Adjustable Solid Core Current Sensing Switch
The Honeywell MCS-NO-A-50A is a solid core, normally open (N/O) current sensing switch designed to prove the operation of motors, fans, pumps, and other current-carrying loads in HVAC and building automation applications. With an adjustable sensing range of 0.75 to 50 amps, this switch provides reliable load verification across a wide variety of equipment types and system configurations.
Key Features
- Adjustable current sensing range: 0.75–50A
- Solid core design for secure, permanent conductor installation
- Normally open (N/O) output configuration
- Confirms motor, fan, pump, or load operation via current detection
- Ideal for HVAC controls, building automation systems (BAS), and energy management applications
- Simple set-point adjustment for flexible field configuration
- Compact form factor for easy panel or field installation
Application
The MCS-NO-A-50A is commonly used to provide proof-of-operation feedback in HVAC systems. When current flows through the monitored conductor, the switch closes its N/O contact, signaling a controller or BAS that the load is energized and operating. This makes it ideal for fan proving, pump proving, and motor status monitoring in commercial and light industrial environments.
Product Specifications
- Brand: Honeywell
- Model / SKU: MCS-NO-A-50A
- Sensing Range: 0.75–50A (adjustable)
- Core Type: Solid Core
- Output Type: Normally Open (N/O)
- Typical Applications: Motor proving, fan proving, pump status, BAS load monitoring
