Translations:Manuals:MBPlusFblV52:Radio System/7/en

Spektrum® SRXL2 receiver

Spektrum SRXL2 receivers are available in different forms. There exist receivers with standard servo connectors as well as receivers with a special 4-wire connector. Anyways, the output signal of those receiver must always be connected to the pin board at the side of MICROBEAST PLUS.

When using a speed controller with BEC, the power will be distributed from [CH5] input of MICROBEAST PLUS to the receiver. Alternatively or additionally you can connect a power supply/second BEC wire/buffering battery to the [SYS] port. Feeding power directly into the receiver is not possible as the voltage connector on MICROBEAST PLUS side is only oneway!


In order to connect a receiver with standard servo connectors, i.e. the AR6610T, you need the SRXL2 receiver adapter. Also you may use the governor sensor adapter BXA76401 but this requires to modify the wiring layout as shown below! Voltage is the first pin from the left, signal is connected at the third pin from the left. Minus is the second pin from the front/right.

SRXL2 receiver with standard servo connector and adapter

In order to connect a SRXL2 receiver like SPM4650/SPM4651T it is necessary to INTERCHANGE THE WIRES of the supplied 4-pin receiver connector. In this configuration you can directly plug in the receiver without the need for an extra adapter. But be very careful! Make sure plus and minus are placed properly! The signal wire is connected at the fourth pin from the front/right, minus ist second pin from the front/right, voltage (+3.3V) is the first pin from the front/right. On satellite side the signal output is on the outer side, the pin next to it is not used, then we have voltage and on the inner side comes minus.

SRXL2 satellite receiver with modified satellite connector

Never connect the 4-wire receiver connector to MICROBEAST PLUS without modification and in wrong polarity! This will damage your receiver immediately! Check polarity at least twice before connecting the receiver to MICROBEAST PLUS. It is up to you to make sure polarity is correct. We do not assume any liability in case you do it wrong.