Multiplex Receiver Rx-12-Dr Compact Ml 2.4 G 55821

The Multiplex RX-12-DR Compact M-LINK 2.4 GHz receiver (MPX55821) delivers top-level performance in an ultra-slim format. Built around a dual-receiver architecture with high-performance signal pre-amplifiers, it provides robust reception, excellent security and powerful telemetry in a lightweight, space-saving package.

Primarily aimed at glider pilots flying F3B and F3J, this twelve-channel unit shares technology with the brand’s pro-series receivers, adding confidence for demanding soaring and high-precision flight. Despite its compact size, it integrates telemetry, logging and flexible configuration options for advanced setups.

Key Features

• Ultra-compact dual receiver, available with 12 channels
• Signal pre-amplification for maximum sensitivity
• Telemetry / downlink capability. Receiver battery voltage and signal quality (LQI) without separate sensors
• Integral sensor interface for connecting external sensors. Including other makes of sensor compatible with the MSB (MULTIPLEX Sensor Bus)
• HOLD / FAIL-SAFE function
• Integral button and LED for: Binding, FAIL-SAFE programming, RESET and operating status information
• Wide operating voltage range 3.5 - 9 V (compatible with high-voltage servos)
• Option of two-receiver mode (= double diversity)
• Integral error counter / data logger (operating voltage errors, signal errors)
• Sum signal output (e.g. for FBL systems)
• Compatible with MULTImate (for supplementary receiver settings, e.g. HOLD / FAIL-SAFE times, HOLD / FAIL-SAFE by channel, telemetry settings)
• Integral PC interface for firmware updates and receiver set-up via PC

Specifications

• Servo channels: 12
• Receive system: 2.4 GHz FHSS
• Operating voltage: 3.5 V – 9.0 V
• Power supply: 4–6 NiXX cells, 2S LiXX
• Operating temperature: -20°C to +55°C
• Dimensions (L x W x H): 53.5 x 17.5 x 22.5 mm
• Weight: 18.5 g

Suggested Compatibility

• F3B and F3J gliders and similar high-performance sailplanes
• FBL systems requiring a sum signal input
• High-voltage servo installations (within 3.5–9.0 V range)
• MSB-compatible external sensors (MULTIPLEX Sensor Bus)