Translations:KAVAN Smart PRO SE4 4ch BUS servo decoder - Instruction manual/14/en

From KAVAN RC Wiki

Default connection of JETIBOX/SMART-BOX. An adapter cable between MR30 and JR is necessary.

Optional type of connection. The port No. 4 must be configured to sensor input (possible options “Ch4: Sensor EX” or “Ch1–Ch4: EX Bus”).

Optional SMART-BOX connection. Output No. 4 must be configured to the “Ch4: Sensor EX” option and the SUMD signal must be detected on the MR30 connector.