Briggs & Stratton 50 A NEMA 4 Dual Low Voltage Module for Symphony II Transfer Switch

The Briggs & Stratton Symphony II Dual Low‑Voltage Module gives your standby generator the brains to juggle two thermostat‑controlled loads — like a pair of central A/C units or a heat pump — without maxing out capacity. Rated at 50 A and sealed in a weather‑tight NEMA 4 enclosure, it keeps comfort systems running smoothly when the grid goes dark.

• 50 A dual‑channel low‑voltage load‑management module
• Controls two independent 120 V thermostat circuits (two A/C condensers, dual‑stage heat pump, etc.)
• NEMA 4 rain‑, dust‑, and ice‑resistant plastic enclosure — indoor/outdoor safe
• Engineered exclusively for Briggs & Stratton Symphony II transfer switches and compatible generators
• Priority‑based logic sheds and restores loads to prevent generator overloads
• Daisy‑chain up to eight modules per system for whole‑house management
• 18 AWG plug‑and‑play control wiring; mounts right at the HVAC equipment
• UL listed • 3‑year limited warranty

Smart cooling for two zones

During an outage, Symphony II continuously watches generator output and stages each connected A/C or heat‑pump circuit only when there’s headroom — so both zones stay comfortable and breakers stay closed.

Two loads, one compact box

One module manages two thermostat lines, eliminating the need for multiple enclosures. DIP switches let you set separate priorities for each channel in seconds — no software, no laptops.

Built to shrug off weather

The gasketed NEMA 4 cabinet seals out rain, dust, and hose‑down water. UV‑stable gray plastic won’t rust near the condenser pad or rooftop unit.

Fast, low‑voltage installation

A slim 8.75'' x 5.5'' x 3'' fits neatly on siding or equipment rails. Because the module rides on the thermostat loop, no conduit wrestling or heavy conductors are required.

Electrical / Environmental Ratings

Amperage: 50 A • Voltage: 120 V • Frequency: 60 Hz • Enclosure: NEMA 4 • Listing: UL • Communication: Symphony II PLC

Size

8.75'' x 5.5'' x 3''

Weight

2.1 lb