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SBUS2 telemetry adapter for JetCat ECU
©Copyright Ilkka Jauho 2013, 2014
Connections & Use

Connect Servo cable to SBUS2 connection of Futaba's telemetry receiver.

Set transmitter's sensor settings ( & change slots if needed due to conflicting sensors).

Connect "phone cable" to ECU's GSU connector.
Pump
Voltage
Status
OFF
vo
remaining fuel
11000ml
Technical specifications

Compatible with JetCat Ecu "V6.0" or higher

9600baud ECU comm. (default, Do not change ECU settings)

ECU default slave addr 1 (single turbine use only. don't change)

Tested with Futaba SBUS2 receiver: R7008SB & R7003SB

Tested with Futaba 18MZ & 14SG
(Automatic registration of Robbe Telemetry box may not work)

Compatible with Futaba & Robbe sensors




Voltage range: 3.5V - 10V (2S LiPo OK)
ECU Telemetry info provided: Turbine RPM, EGT (°C), Pump
Voltage (V), Running state & off condition (numerical), Fuel flow
(cl/min), remaining fuel (ml), Ecu battery Voltage (V)
ECU signal opto-isolated for maximum safety
Weight: 12g. including 30cm SBUS2 cable & 10cm ECU cable
Fuel flow
1600ml/min


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
WARNING! Failure to comply may cause permanent damage:
USE ONLY JetCat original "phone" cables or the cable provided with the adapter! Cable must have all connections
1-to-1, absolutely no crossed connections.
If other sensors connected to SBUS2 make sure sensor slot numbers are not conflicting with the adapter slots!
Select free slots before connecting other sensors!
Do not try to connect adapter to transmitter's SBUS2 connector: Automatic sensor registration is not supported;
only manual slot setting is supported.
Keep Channel1 programmed around middle in normal use while powering receiver on: this prevents unintentional
slot page setting mode entry and accelerates power on. Channel1 can be used normally fex as Aileron.
Turbine status as shown "Voltage(Ext battery):
Turbine active states
code
Description
OFF --> last off
0
condition shown
1
WAIT for RPM
2
Ignite
3
Accelerate
4
Stabilize
6
Learn Lo
8
Slow Down
10
AutoOff
11
Run
12
Acceleration delay
13
SpeedReg
14
2-shaft regulate
15
PreHeat1
16
PreHeat2
17
MainFStr
19
Keros.FullOn
code
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Off conditions
Description
Shut down via RC
Over temperature
Ignition timeout
Acceleration timeout
Acceleration too slow
Over RPM
Low RPM Off
Low battery
Auto Off
Low Temp Off
High Temp Off
Glow plug defective
Watchdog timer
Fail Safe off
Manual off (via GSU)
Battery fail
Temp sensor fail
Fuel fail
Prop fail
Slot Page
1
(default)
2
3
4
Transmitter settings - See Transmitter's manual
For Default Slot page (1) select the following sensors
By renaming sensors it's more intuitive to use:
Sensors slots
1: SBS-01RM (RPM), 2: CUR-F1678,
5: SBS-01T(Temp) 6:SBS-01V (Volt.)
8: RPM, 9: CUR-F1678,
12: Temperature, 13: Voltage
16: RPM, 17: CUR-F1678,
20: Temperature, 21: Voltage
24: RPM, 25: CUR-F1678,
28: Temperature, 29: Voltage
Slot page setting method
(Only needed if sensor slots 1-7 already in use. Do before connecting other sensors)
1. Set maximum travels for Channel 1 (Ch1) - Connect only the adapter to
receiver's SBUS2 connection
2. Hold Ch1 either min or max (usually aileron stick to either side) while switching
receiver power on.
3. LED starts blinking, move Ch1 immediately to the opposite end
4. LED is solid, move stick immediately back to the same end as (2.)
5. LED starts blinking fast. CENTER Channel1 now! then wait...
6. LED starts blinking sequentially 1x, 2x, 3x, 4x, 1x,2x, and so on. This indicates slot
page number. One slot page is blinking 5 times before next sequence begin:
... *
*
*
*
** ** ** ** ** *** *** *** *** *** **** **** **** **** **** * ...
7. While desired slot page is blinking move Channel1 to either end.
8. The adapter confirms the selection: LED is solid for a while and then LED starts
to blink continuously to indicate the selected SLOT page: fex. 2x blinking means
slot page 2 was selected. Verify that the right page got selected and switch
received power off. If failure try again, new setting got saved to EEPROM.
Disclaimer
Manufacturer or seller of the adapter assumes no responsibility for possible damages or malfunctions caused directly or indirectly by the use of the adapter.
Seller has no opportunity to ensure correct use of the adapter and sufficient testing before use. Also compatibility of other devices possibly used simultaneously
in the same system cannot be verified by the seller or manufacturer.
Sbus2 is trademark of Robbe/Futaba. JetCat is trademark of JetCat Germany.