Safety Instructions

Spektrum SRXL2

Installation instructions

1. Connect the receiver to your ﬂ ight controller as shown in the diagram below.

2. Install the active portion of the antennas (the exposed section at the end of

the antenna wire) as far as possible from metal, carbon ﬁ ber, and wiring.

CAUTION: Do not kink, cut or damage the antenna wire. The antenna

is made of a coaxial wire; if the outer sheath becomes damaged, the

receiver will not work properly.

Binding

The SPM4651T requires a 5 volt power supply from the ﬂ ight controller.

1. Press and hold the bind button on the receiver.

2. Power on the aircraft. The orange LED will begin ﬂ ashing.

3. Put the transmitter into bind mode. The bind process is complete when the

orange LED on the receiver is solid.

Alternatively the SPM4651T receiver may be put into bind mode through the

ﬂ ight controller interface.

Bind Button

Antennas

Signal

N/C

V+

GND

SPM4651T

Type DSMX SRXL2 Serial Telemetry Receiver

Dimensions (L × W × H) 28.2 × 17.3 × 6.6 mm (1.11 × 0.68 × 0.25 in)

Antenna Length 100mm

Weight 3.0g

Band 2.4 GHz

Voltage Range 3.3–8.4V

The SPM4651T uses SRXL2 to communicate with ﬂ ight controllers. SRXL2 is

a serial communication protocol using a bi-directional data link in which one

wire can communicate all control and telemetry data. Previous Spektrum serial

receivers were based on the Spektrum remote receiver protocol, which is not

compatible with SRXL2.

To learn more about the features and beneﬁ ts of SRXL2 visit www.SRXL2.com