FrSky RB-25 Triple Receiver Redundancy Bus with Dual XT30 Power Input

The FrSky RB-25 Redundancy Bus builds on the trusted RB series with a compact new design that delivers triple receiver redundancy and dual-power balancing in a flight-safe package. Three RX input ports (RX1–3 IN) accept FBUS, SBUS, or S.Port signals with auto-recognition, providing full signal and telemetry redundancy. Dual XT30 power inputs operate in balance mode — automatically drawing from whichever source has the higher voltage — for safe, efficient power management. A built-in power switch function supports multiple external switch types (NFC, pin plug, etc.) to eliminate the need to plug/unplug battery connections.

Key Features

• Triple receiver redundancy via 3x RX input ports (RX1–3 IN)
• FBUS / SBUS / S.Port auto-recognition on all RX input ports
• Dual XT30 power inputs with balancing consumption (draws from higher-voltage source)
• 18 configurable channel ports (PWM / FBUS / S.Port / SBUS Out)
• Built-in power switch function — supports NFC switch, pin plug, and other external switches
• External LED indication support
• Built-in telemetry sensors (altitude, vertical speed, and more on RB-25S variant)
• Compatible with FBUS/S.Port telemetry products

Compatibility

• Compatible with FrSky FBUS, SBUS, and S.Port receivers
• Can be used as an alternative to GR or S series receivers
• Note: Only the S.Port on RX1 can be used for firmware upgrades

Specifications