Description
Schneider Electric (Barber Colman) R851B-8 — 8-Stage AC/DC Step Controller
The Schneider Electric (Barber Colman) R851B-8 is a professional-grade, 8-stage AC/DC step controller engineered for precise, sequential staging of HVAC equipment. Designed for commercial and industrial building automation applications, this step controller enables systematic activation and deactivation of multiple heating, cooling, or ventilation stages, improving system efficiency and extending equipment life by reducing simultaneous load starts.
Key Features
- 8-stage step control for sequential HVAC equipment staging
- Compatible with both AC and DC control circuits for versatile installation
- Engineered for commercial and industrial HVAC applications
- Supports multi-stage heating and cooling systems, including electric heat strips, chillers, and cooling towers
- Reduces demand spikes by staggering equipment start sequences
- Reliable Barber Colman / Schneider Electric design for long service life
- Integrates seamlessly into building automation and energy management systems
Applications
- Multi-stage electric heating systems
- Chiller and cooling tower sequencing
- Commercial rooftop unit staging
- Air handling unit control sequences
- Building automation and DDC system integration
Why Choose the R851B-8?
The R851B-8 from Schneider Electric’s trusted Barber Colman line delivers dependable step sequencing that protects equipment, reduces energy demand charges, and ensures smooth system transitions. Its AC/DC compatibility makes it a flexible solution for a wide range of commercial HVAC control panels and building automation projects.
Product Details
- Brand: Schneider Electric (Barber Colman)
- Model / SKU: R851B-8
- Number of Stages: 8
- Signal Type: AC/DC
- Application: Commercial / Industrial HVAC Step Sequencing
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