This document introduces the features and characteristics of FrSky RB-30+/RB-40. RB-30+/RB-40 is the upgraded product of FrSky Redundancy Bus series, which adds more features, including triple redundancy, 24 PWM channels, overload protection, battery voltage detection, etc.
The FrSky RB-30+ and RB-40 are electronic redundancy hubs designed to manage multiple receivers in a single system. The RB-40 model features an LCD screen, menu scroll button, and CNC aluminum and carbon fiber casing, while the RB-30+ is a compact version without these display features. Both models support dual power inputs for safety and can handle up to 24 PWM channels with built-in overload protection.
| Weight (RB-30+) | 100g |
|---|---|
| Weight (RB-40) | 260g |
| Power connector (RB-30+) | XT30 |
| Power connector (RB-40) | XT60 |
| Number of servos supported | up to 24 |
| Operating temperature range | -20℃~75℃ |
The device supports an input voltage range of DC 7V to 26V, with a recommended range of DC 11V to 26V.
The device supports connecting up to 24 high-voltage servos with overload protection added to each output channel.
Eight of the channels (CH1-8) are equipped with current sensors for real-time detection.
If current overload occurs, the affected servo output will be disconnected from the power supply while remaining servo outputs stay powered.