GRAUPNER HoTT General Engine-Module 2-6 S User manual

GRAUPNER GmbH & Co. KG – Postfach 1242 – 73230 Kirchheim/Teck – www.graupner.de
Manual
33610 General Engine-Module 2-6 S
Graupner HoTT 2.4
CONTENTS:
1. Description........................................................................................................................................ 01
2. Mounting the module n the plane ................................................................................................... 01
3. Connection of sensors..................................................................................................................... 0 1
4. Starting up......................................................................................................................................... 02
5. Operation........................................................................................................................................... 03
5.1. Display LIPO CELL VOLTAGE ........................................................................................................... 03
5.2. Sensor 1/2 voltage.............................................................................................................................. 04
5.3. Sensor 1/2 temperature...................................................................................................................... 05
5.4. REV counter ....................................................................................................................................... 05
6. Programming warning thresholds.................................................................................................. 06
6.1. Minimum cell voltage (Page 2)).......................................................................................................... 08
6.2. Minimum cell voltage sensor 1 (Page 3) ............................................................................................ 08
6.3. Maximum cell voltage sensor 1 (Page 4) ........................................................................................... 08
6.4. Minimum temperature sensor 1 (Page 5)........................................................................................... 08
6.5. Maximum temperature sensor 1 (Page 6).......................................................................................... 09
6.6. Minimum cell voltage sensor 2 (Page 7) ............................................................................................ 09
6.7. Maximum cell voltage sensor 2 (Page 8) ........................................................................................... 09
6.8. Minimum temperature sensor 2 (Page 9)........................................................................................... 09
6.9. Maximum temperature sensor 2 (Page 10)........................................................................................ 10
6.10. Maximum current (Page 11) ............................................................................................................... 10
6.11. Maximum capacity (Page 12)............................................................................................................. 10
6.12. Minimum voltage socket 1 (Page 13) ................................................................................................. 10
6.13. Maximum voltage socket 1 (Page 14) .................................................................................................11
6.14. Minimum RPM (Page 15) ....................................................................................................................11
6.15. Maximum RPM (Page 16) ...................................................................................................................11
7. Setup-Displays.................................................................................................................................. 12
7.1. Calibration of temperature sensors .................................................................................................... 12
7.2. Blade number ..................................................................................................................................... 12
7.3. Current control.................................................................................................................................... 13
8. Summary signal tones ..................................................................................................................... 15
9. Telemetry display ............................................................................................................................. 16
10. Firmware-Update .............................................................................................................................. 17
11. Specifications ................................................................................................................................... 19
12. Warranty ............................................................................................................................................ 21

THANK YOU
for purchasing the General Engine-Module for the Graupner HoTT 2.4 system.
If you do not have the Graupner HoTT 2.4 radio system this product will not work. This product is not com-
patible with any other 2.4GHz radio system.
Please read through this entire manual before you attempt the installation and usage of your Graupner HoTT
General Engine-Module!
These operating instructions are part of this product. They contains important notes to the operation and
handling. Please take this into consideration when you pass on the product to third parties. Neglect of the
operating instructions and the safety instructions lead to expiring the warranty.
Graupner constantly work on the advancement of all remote control systems; changes of the scope of deli-
very in form, technology and equipment we must reserve ourselves therefore. Please have understanding
for the fact that from data and illustrations of this operating instructions no requirements can be derived.
Please keep these instructions for further reference!
DESCRIPTION1.
The Graupner-HoTT General Engine-Module enables the wireless monitoring of for example the battery
voltage, power consumption, motor rpm, or fuel consumption of the model in real time. The General Engine-
Module can be programmed directly with all HoTT transmitters with integrated telemetry in the transmitter
display (some models such as MC-24 with update or modification).
The following transmitters must be programmed via SMART-BOX order No. 33700: mx-12 HoTT order
No. 4754, mx-16 HoTT order No. 4755, and mx-22 No. 4801/4802, mc-19 No. 4821 and mc-22 No. 4818
after conversion to HoTT. This differentiation between the transmitter models and the resulting operation is
explicitly mentioned at the appropriate point in the instructions (see also point 5).
For full functionality, additional sensors are necessary.
Informations available - Setup:
Battery voltage (total - single cell), Min./Max. voltage, Min./Max. cell voltage
Maximum current, used capacity
Temperature (optional Sensor 1/Sensor 2), Min./Max. Temperature
Fuel level, Min. fuel level,
RPM, Minimum/ Maximum RPM
Note: Any settings you make on the Transmitter or SMART-BOX will be stored in the General Engine-
Module only!
Since the General Engine-Module can be updated via the USB connection, you always have the latest soft-
ware and can utilize future functions or languages. Firmware updates for the General Engine-Module can
be transferred via the DATA or telemetry interface in conjunction with a PC running Windows XP, Vista or 7.
For this you also require the USB interface, Order No. 7168.6, the adapter lead, Order No. 7168.6A and a
Y-cable Order No. 3936.11 which are available separately.
The programs and files required for this are available from www.graupner.de in the Download area for the
corresponding products.
2. MOUNTING THE MODULE IN THE PLANE
Mount the General Engine-Module at an appropriate location in the model. The best way to fix the General
Engine-Module with the mounting tabs or double sided tape on a wind-protected frame in the model, the
orientation of the sensor is not important.
3. CONNECTION OF SENSORS
The consumed current and capacity is measured only on connection 1 (IN) and 8 (OUT). Therefore, the
main battery for the motor (electric model - G3.5 connector) or the transmitter battery (Nitro model - JR con-
nector) must be connected to this connection. Use a connector system to replace the battery easily. If you
use a LIXX battery, the balancer can be plugged into socket 6 to monitor the individual cell voltage.
01 33610 General Engine-Module - Graupner HoTT 2.4

Caution: never connect batteries to both sockets (G3.5 and JR)!
These are inter-connected, and must only be used separately.
Note also that the input voltage is present at the JR socket at
output 8; do not connect the plug to the receiver if the voltage
is higher than the maximum permissible voltage for receiver or
servos.
Note: All negative terminals are interconnected and not galvanically seperated.
Please ensure that the continuous current does not exceed the stated maximum for the current sensor. You
should also ensure that the motor start-up current is not so high that the shunt resistors are overloaded! This
can result in a break in the power supply, which would cause the model to crash.
For this reason it is important to carry out a thorough check of the motor’s function and maximum current
drain: start cautiously, then increase to maximum load and eventually to a full battery charge, to ensure that
the current shunt resistors are not overloaded.
The “regulate current” function (see point 7.3.) can be used to limit the maximum current passing through
the model’s electronic speed controller. If the model’s current drain is above the peak current permitted for
the General Engine module, then it is essential to use this function to prevent damage to the module or a
break in the power supply.
If high peak currents are likely, you must use the more powerful General Electric sensor, Order No. 33620,
or alternatively you might prefer to manage without current measurement altogether.
When measuring power system currents please note that the voltage fall-off at the shunt resistors can place
an increased load on the speed controller, and on the speed controller’s capacitors in particular. For safety
reasons you should therefore operate the controller on one or two cells fewer than the maximum stated
cell-count, i.e. not with the full count.
Connect any additional sensors to the corresponding sockets as shown in the illustration at the top.
4. STARTING UP
Connect the General Engine-Module (socket 2) with the 3-pin lead to socket marked „T“ of the receiver. The
connector system is polarised, look for the small camfer on the edges. Never use force - the plug should en-
gage easily and fully. The sockets are labeled accordingly: black wire (-), red wire (+) and orange wire (S).
Only for transmitters under 1 „exception“ with SMART-BOX:
Install the SMART-BOX at the mounting bracket of the transmitter as shown in the figure. Connect the box
then the 3-pin lead to the transmitter. Put one end of the cable into the DATA jack on the transmitter and the
other into the jack on the right side of the SMART-BOX. The connector system is polarised, look for the small
camfer on the edges. Never use force - the plug should engage easily and fully. The sockets are labeled
accordingly: black wire (-), red wire (+) and orange wire (S).
1 Battery input max. 60 V DC / 40 A
2 Receiver / SMART-BOX and
Firmware-Update (T)
3 Control Out (output ESC)
4 Control In (input ESC)
5 Sensor 1 (33612 / 33613)
6 Balancer connector LiXX 2 - 6S
7 Sensor 2 (33612 / 33613)
8 Battery output
9 RPM sensor (33615 / 33616)
10 Fuel sensor (33614)
11 Control Switch (select switch for
current control)
33610 General Engine-Module - Graupner HoTT 2.4 02
1
2
3
4
567
8
9
10
11
+ -

5.1. Display LIPO CELL VOLTAGE
Please note: the labeling of the arrows of the following displays corresponds to the keys on top of the
SMART-BOX. This assignment is different depending on the remote control system.
SMART-BOX mx-12/16/20/32 HoTT mc-19/mc-22/mc-24/mx-24 HoTT
ENTER ENTER
ESC CLEAR
INC scroll: value:  scroll: push Rotary + value: Rotary 
DEC scroll: value: scroll: push Rotary + value: Rotary 
INC+DEC SET push Rotary
Note: You can connect the General Engine-Module instead of the receiver directly to the jack on the right
side of the SMART-BOX. By doing this, the settings will be sent directly to the General Engine-Module
(without using the radio control system) and the programming is much faster. A power supply for the SMART-
BOX is neccessary (3.6 - 9 V), inserted on the left side. The connector system is reverse polarised, look
for the small camfer on the edges. Do not use force, the plug should click into place easily. This sockets is
labeled accordingly also. The black wire must be down (-), the red top (+).
5. OPERATION
The operation of the General Engine-Module is similar to the operation of the transmitter. You should also
read the manual of your remote control system, especially the chapter „telemetry“. The operation is done in
the transmitter menu „telemetry“ under the display SETTING & DATA VIEW. The sensor displays follow the
receiver displays (RX), i.e. the „Lipo Cell Voltage“ display follows after the last display servo test (RX SERVO
TEST). Please note: the menus can only be selected when the receiver is switched on. When you switch
the receiver on, it may take a few seconds before the receiver display becomes active and can be selected:
> symbol appears at the top right corner of the transmitter display (TX).
There may be a slight delay in the screen’s response to inputs, since all the settings are transmitted directly
to the receiver by wireless means.
Operation with the SMART-BOX:
The SMART-BOX is operated by the four buttons on the top. Switch with the ESC and ENTER keys between
the different displays. With the DEC and INC buttons you can select the parameters in the display (INC
moves the cursor down, DEC up).
Switch on the transmitter. On the startup screen appears SETTING AND DATA VIEW / MODEL SELECT.
Move the arrow cursor with the INC or DEC buttons on SETTING AND DATA VIEW and then press ENTER
to display the parameters of the transmitter, receiver and telemetry sensors and / or program it, or select
MODEL SELECT to display the telemetry data graphically (see point 9). In MODEL SELECT display no
changes are possible.
After SETTING AND DATA VIEW have chosen, the „Lipo Cell Voltage“ display is available. The sensor dis-
plays follow the transmitter (TX) and receiver (RX) displays, i.e. the „Lipo Cell Voltage“ display follows after
the last display servo test (RX SERVO TEST).
Please note: the menus can only be selected when the receiver is switched on. When you switch the recei-
ver on, it may take a few seconds before the receiver display becomes active and can be selected: > symbol
appears at the top right corner of the transmitter display (TX).
There may be a slight delay in the screen’s response to inputs using the top buttons, since all the settings
are transmitted directly to the receiver by wireless means.
03 33610 General Engine-Module - Graupner HoTT 2.4
The descriptive text describes also primarily the button layout and operation of the SMART-BOX, followed by
the buttons of the mx-16 HoTT as an example in parentheses. Please note that the button layout for example
of the HoTT mc-transmitters (order No. 4758, 4759) may differ. Read the manual of your remote control

LiPo Cell Voltage >
Overall volt: 11.890V
Min 8.450V
1N 3.201V
3N 3.030V
5N 0.000V
Min 2.567V
ESC
Max 16.800V
2N 3.100V
4N 2.567V
6N 0.000V
Max 3.201V
ENTER
The displays 5.1 to 5.4 are simple data displays, this parameters can
not be programmed.
Parameters which have different options in the Settings column of the
table can be adjusted. If there are no options, the screen simply dis-
plays the parameter data.
Parameter Description Setup
Overall Volt Current voltage of the battery connected to socket 6 -
Min. Minimum voltage of the battery connected to socket 6 since
the start -
Max. Maximum voltage of the battery connected to socket 6 since
the start -
1N - 6N Single cell voltage of the LiXX-battery connected to socket 6 -
Min. Minimum single cell voltage of the LiXX-battery connected to
socket 6 since the start -
Max Maximum single cell voltage of the LiXX-battery connected to
socket 6 since the start -
33610 General Engine-Module - Graupner HoTT 2.4 04
system to become familiar with the telemetry operation.
Parameter Description Setup
Sensor 1 Current voltage of sensor 1 connected to socket 5 -
Min./Max. Minimum/Maximum voltage of sensor 1 connected to socket 5
since the start -
Sensor 2 Current voltage of sensor 2 connected to socket 7 -
Min./Max. Minimum/Maximum voltage of sensor 2 connected to socket 7
since the start -
Current Current of the battery connected to socket 1 -
5.2 Sensor 1 - 2 voltage
DEC
INC
Sensor 1 : 14.92V
Min 11.53V
Sensor 2 :
Min 5.60V
Current :
Max Current :
Capacity :
Voltage :
Max 16.800V
7.49V
Max 8.40V
30.2 A
40.3 A
2345 mA
33.88V

5.3. Sensor 1 - 2 Temperature
Parameter Description Setup
Sensor 1 Current temperature of sensor 1 connected to socket 5 -
Min./Max. Minimum/Maximum temperature of sensor 1 connected to socket
5 since the start -
Sensor 2 Current temperature of sensor 2 connected to socket 7 -
Min./Max. Minimum/Maximum temperature of sensor 2 connected to socket
7 since the start -
DEC
INC
Sensor 1 : 25°C
Min 20°C
Sensor 2 :
Min 20°C
Max : 60°C
160°C
Max : 260°C
5.4. Rev counter
Parameter Description Setup
RPM (2 blade) Current motor speed in revolutions per minute and the preset
blade number -
Max. Maximum RPM since the start -
Min. Minimum RPM since the start -
With connected speed sensor, the current engine rpm is determi-
ned. Therefore, you must first specify how many blades (or mag-
nets with sensor order no. 33516) the propeller / rotor has to get the
correct rpm. In addition, you can set the minimum engine speed at
which the alarm should be triggered.
See point 7.2. for setup.
RPM (2blade) :
Max. :
Min. :
DEC
7200
16300
3500
INC
Parameter Description Setup
Max. Current Maximum current of the battery connected to socket 1 since
the start -
Capacity Used capacity of the battery connected to socket 1 since the
start -
Voltage Current voltage of the battery connected to socket 1 -
05 33610 General Engine-Module - Graupner HoTT 2.4

6. PROGRAMMING WARNING THRESHOLDS
If you wish to carry out an adjustment, you must use the INC or DEC buttons (or ) above the screen to
select the desired parameter (e.g. page 2) by moving the arrow cursor (INC or moves the cursor down,
DEC oder moves it up). Simultaneously pressing the INC and DEC (SET) buttons switches the parameter
to be adjusted to inverse video (white on black); this indicates that it can be programmed: pressing the INC
() button at this point increases the value, pressing the DEC () button reduces the value. When the ad-
justment is complete, save the selected setting by pressing the INC and DEC (SET) buttons simultaneously;
the dark background now disappears in order to confirm this action.
Display (Set Warning): shows the various „display pages“ with the possible adjustable parameters and
the associated adjustable warning thresholds (page 1, page 2, etc.). To switch between pages, press the
INC or DEC key.
Factory Set: choosing „OK“, will reset the settings of the variable module to factory settings.
The following parameters can be set separately for all displays:
Warning Time: sets whether and how long the warning signal is activated when reaching a certain value
for each display screen.
Repeat Time: sets how often the warning signal is activated when reaching a certain value for each display
screen.
Signal Tone: sets the signal tone melody. The warning sounds are combined with the warnings on the
display and the voice output. Therefore, they may not be changed.
Overview of the signal tones on page 15.
When a warning is activated, the corresponding message (eg. Min. Height) is shown inverted in the
first row of the associated display, which then appears alternately with the display VARIO SENSOR
and the selected Signal Tone A - Z sounds.
You can stop the warning at any time by pressing one of the buttons on the top of the SMART-
BOX.
ESC
ENTER
ESC
General Engine-Module <>
>Set Warning :
Save to Sensor?
Factory Set?
Ver: S 1.100
page 1
No
No
INC
DEC
ENTER
LiPo Cell Voltage >
Overall volt: 11.890V
Min 8.450V
1N 3.201V
3N 3.030V
5N 0.000V
Min 2.567V
Max 16.800V
2N 3.100V
4N 2.567V
6N 0.000V
Max 3.201V
General Engine-Module <>
Set Warning :
>Save to Sensor?
Factory Set?
Ver: S 1.100
page 1
No
No
33610 General Engine-Module - Graupner HoTT 2.4 06

Parameter Display page Description Setup
Warning Time Page 2 – page 24 Warning time OFF, 5, 10, 15, 20,
25, 30 sec.
Repeat Time Page 2 – page 24 Repeat time Always, 1, 2, 3, 4, 5
Minuten, One Time
Signal Tone Page 2 – page 24 Signal tone A - Z
Save Sensor Page 1 saves the setup to the General
Engine-Module
OK / NO
Factory Set Page 1 Reset to factory settings OK / NO
If you wish to carry out an adjustment (point 6.1 to 6.15) you must use the INC () or DEC () buttons
above the screen to select „page 1 - Save Sensor“. Simultaneously pressing the INC and DEC buttons
(SET) switches the parameter to be adjusted to inverse video (white on black); this indicates that it can be
programmed: pressing the INC () button at this point increases the value to YES. When the adjustment is
complete, save the selected setting by pressing the INC and DEC buttons (SET) simultaneously; the dark
background now disappears in order to confirm this action.
If you do not want to save the adjustments, select NO.
Warning:
• Do not carry out any programming work on the sensors while the model is flying, otherwise there is a real
risk that your model will fly out of control while you are not concentrating on it!
• If your model is fitted with two or more receivers, it is absolutely essential that you do not carry out pro-
gramming work during a flight, as this can alter the settings in the receivers to which no telemetry equip-
ment is connected; in the worst case this could result in the model crashing.
For this reason always carry out programming on the ground, and check that only the receiver with con-
nected sensors is powered on.
07 33610 General Engine-Module - Graupner HoTT 2.4

33610 General Engine-Module - Graupner HoTT 2.4 08
6.2. Minimum Cell Voltage Sensor 1 (Page 3)
The voltage of the battery connected to sensor 1 (socket 5) is monito-
red. Warning threshold set between 0 and 80.0 V (0.1 V steps).
Factory setting: 5.0 V, Signal Tone: R
6.3. Maximum Cell Voltage Sensor 1 (Page 4)
The voltage of the battery connected to sensor 1 (socket 5) is monito-
red. Warning threshold set between 0 and 80.0 V (0.1 V steps).
Factory setting: 30 V, Signal Tone: J
6.4. Minimum Temperature Sensor 1 (Page 5)
The temperature of the sensor 1 (socket 5) is monitored. Warning
threshold set between -20 and 200° C (1° C steps).
Factory setting: 0° C, Signal Tone: F
6.1. Minimum Cell Voltage (Page 2)
The voltage of the battery connected to socket 6 is monitored. Warning
threshold set between 2.5 and 4.2 V (0.1 V steps).
Factory setting: 3.3 V, Signal Tone: Q
The bottom line shows the current measured value.
INC
DEC
Min. Cell Voltage
>Set Warning :
Voltage/Cell :
Warning Time :
Repeat Time :
Signal Tone :
Min. Voltage :
page 2
3.3V
Off
Always
Q
0.000V
DEC
INC
Min. Sensor1 Voltage
>Set Warning :
Min Voltage :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 1 : 0.00V
page 3
5.0V
Off
Always
R
DEC
INC
Max. Sensor1 Voltage
>Set Warning :
Min Voltage :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 1 :
page 4
30.0V
Off
Always
J
0.00V
DEC
INC
Min. Sensor1 Temp
>Set Warning :
Temperature :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 1 :
page 5
0°C
Off
Always
F
00°C

6.5. Maximum Temperatur Sensor 1 (Page 6)
The temperature of the sensor 1 (socket 5) is monitored. Warning
threshold set between -20 and 200° C (1° C steps).
Factory setting: 100° C, Signal Tone: H
09 33610 General Engine-Module - Graupner HoTT 2.4
6.6. Minimum Cell Voltage Sensor 2 (Page 7)
The voltage of the battery connected to sensor 2 (socket 7) is monito-
red. Warning threshold set between 0 and 80.0 V (0.1 V steps).
Factory setting: 5.0 V, Signal Tone: S
6.7. Maximum Cell Voltage Sensor 2 (Page 8)
The voltage of the battery connected to sensor 1 (socket 5) is monito-
red. Warning threshold set between 0 and 80.0 V (0.1 V steps).über-
wacht den an Buchse 7 über Sensor 2 angeschlossen Akku.
Factory setting: 30 V, Signal Tone: K
6.8. Minimum Temperature Sensor 2 (Page 9)
The temperature of the sensor 2 (socket 7) is monitored. Warning
threshold set between -20 and 200° C (1° C steps).
Factory setting: 0° C, Signal Tone: G
INC
INC
Max. Sensor1 Temp
>Set Warning :
Temperature :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 1 :
page 6
100°C
Off
Always
H
00°C
Min. Sensor2 Voltage
>Set Warning :
Min Voltage :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 2 :
page 7
5.0V
Off
Always
S
0.00V
DEC
INC
Max. Sensor2 Voltage
>Set Warning :
Max Voltage :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 2 :
page 8
30.0V
Off
Always
K
0.00V
INC
DEC
Min. Sensor2 Temp
>Set Warning :
Temperature :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 2 :
page 9
0°C
Off
Always
G
00°C
DEC
INC

33610 General Engine-Module - Graupner HoTT 2.4 10
6.9. Maximum Temperature Sensor 2 (Page 10)
The temperature of the sensor 2 (socket 7) is monitored. Warning
threshold set between -20 and 200° C (1° C steps).
Factory setting: 100° C, Signal Tone: I
6.10. Maximum Current (Page 11)
If the module is connected between the power supply and the motor or
receiver battery, the power consumption of the connected equipment is
measured. You can program the maximum peak current at which the
alarm should be triggered, to avoid to overload the motor or battery.
Monitors the battery connected to port 1. The warning threshold is ad-
justable up to 50 A in 0.1 A steps.
Factory setting: 40 A, Signal Tone: W
6.11. Maximum used Capacity (Page 12)
If the module is connected between the power supply and the motor or
receiver battery, the power consumption of the connected equipment
is measured. You can program the max. used capacity at which the
alarm should be triggered, so you have enough remaining capacity for
a save landing.
Monitors the battery connected to port 1. The warning threshold is ad-
justable up to 30.000 mAh in 0.1 A steps.
Factory setting: 2000 mAh, Signal Tone: V
6.12. Minimum Voltage socket 1 (Page 13)
The voltage of the battery connected to socket 1 is monitored. Warning
threshold set between 0 and 80.0 V (0.1 V steps).
Factory setting: 5.0 V, Signal Tone: P
Max. Sensor2 Temp
>Set Warning :
Temperature :
Warning Time :
Repeat Time :
Signal Tone :
Sensor 2 :
page 10
100°C
Off
Always
I
00°C
DEC
INC
Max. Current
>Set Warning :
Max Current :
Warning Time :
Repeat Time :
Signal Tone :
Current :
page 11
40A
Off
Always
W
0.0A
DEC
INC
Max. Used Capacity
>Set Warning :
Max Capacity :
Warning Time :
Repeat Time :
Signal Tone :
Capacity :
page 12
2000mA
Off
Always
V
0 mA
DEC
INC
Min. Power Voltage
>Set Warning :
Min Voltage :
Warning Time :
Repeat Time :
Signal Tone :
page 13
5.0V
Off
Always
A
DEC
INC

6.13. Maximum Voltage socket 1 (Page 14)
The voltage of the battery connected to socket 1 is monitored. Warning
threshold set between 0 and 80.0 V (0.1 V steps).
Factory setting: 30 V, Signal Tone: X
6.14. Minimum RPM (Page 15)
Monitors the optional speed sensor order no. 33615 or 33616 connec-
ted to socket 9.
With connected speed sensor, the current engine rpm is determined.
Therefore, you must first specify how many blades the propeller / rotor
has to get the correct rpm (see Section 7.2). In addition, you can set the
minimum engine speed at which the alarm should be triggered.
Blade Number: adjustable from 1 to 6 blades
The warning threshold is adjustable from 0 to 200.000 rpm (1 blade)
with 10 rpm steps.
Factory setting: 200 rpm, Signal Tone: T
6.15. Maximum RPM (Page 16)
Monitors the optional speed sensor order no. 33615 or 33616 connec-
ted to socket 9.
The warning threshold is adjustable from 0 to 200.000 rpm (1 blade)
with 10 rpm steps.
Factory setting: 7000 rpm, Signal Tone: Y
11 33610 General Engine-Module - Graupner HoTT 2.4
DEC
INC
Maximum RPM
>Set Warning :
Maximum rpm:
Warning Time :
Repeat Time :
Signal Tone :
RPM ( 2 ) :
page 16
7000
Off
Always
Y
0
Max. Power Voltage
>Set Warning :
Max. Voltage :
Warning Time :
Repeat Time :
Signal Tone :
Voltage :
page 14
30.0V
Off
Always
X
0.00V
DEC
INC
Minimum RPM
>Set Warning :
Minimum rpm :
Warning Time :
Repeat Time :
Signal Tone :
RPM ( 2 ) :
page 15
500
Off
Always
T
0
DEC
INC

33610 General Engine-Module - Graupner HoTT 2.4 12
7. SETUP DISPLAYS
7.1. Calibration of the temperature sensors
Go to the User Setup screen of the General Engine-Module as in the diagram shown above. Select the User
Setup display as shown in the diagram. Press the INC and DEC buttons on the SMART-BOX (resp. SET)
simultaneously and select User Setup page 2. You can now calibrate the temperature of the sensors 1 and 2
in the range of -10 to +10 ° C to increase the accuracy of the display. To save the settings, go back to page
1 and choose ,Save Sensor‚ YES.
7.2. Select Blade Number:
With connected speed sensor, the current engine rpm is determined.
Therefore, you must first specify how many blades (or magnets with
sensor order no. 33516) the propeller / rotor has to get the correct rpm.
In addition, you can set the minimum engine speed at which the alarm
should be triggered.
Blade Number: adjustable from 1 to 6 blades
General Engine-Module <
>User Setup :
Save to Sensor?
Factory Set?
page 1
No
No
INC + DEC
page 1
No
No
INC + DEC
INC
page 2
30°C
30°C
DEC
General Engine-Module <
>User Setup :
Save Sensor?
Factory Set?
Adjust Temperature
>User Setup :
Sensor1 Temp:
Sensor2 Temp:
INC
page 3
2
DEC
Blade / Magnet Number
>User Setup :
Blade Number:
ESC
ENTER
ESC
General Engine-Module <>
>Set Warning:
Save Sensor?
Factory Set?
Ver: S 1.100
page 1
No
No
LiPo Cell Voltage >
Overall volt : 11.890V
Min 8.450V
1N 3.201V
3N 3.030V
5N 0.000V
Min 2.567V
Max 16.800V
2N 3.100V
4N 2.567V
6N 0.000V
Max 3.201V
ENTER
ESC
General Engine-Module <
>User Setup:
Save Sensor?
Factory Set?
page 1
No
No
ENTER

13 33610 General Engine-Module - Graupner HoTT 2.4
7.3. Programming Current Control:
In this display you can determine and limit the maximum current drawn
by the model’s power system.
If the model’s current drain is above the permitted peak current for the
General Engine-Module, it is essential to use this function to prevent
damage to the module or a break in the power supply, as this would
be likely to cause the model to crash (see also Point 3: connecting the
sensors).
Parameter Description Setup
Current Maximum current 0 - 60 A
On [XXXXus] Current control activated 500 - 2500 us
On Method Current control enabled, is the current consumption
above the CURRENT value, the ESC goes to STOP po-
sition until to the current consumption drops again
Current control disabled, IN signal CI is outputted as
CO without modification
ON / OFF
Stop ESC position when current consumption above the
CURRENT value
500 - 2500 us
Battery (IN)
Electronic speed control
(CO)
Telemetry socket (T)
connect to telemetry so-
cket of the receiver
to drive motor (OUT)
Note: the permitted maximum
current for the lower JR so-
ckets is 5 A! This socket may
only be used if the model’s
power system never exceeds
this value. If you ignore this,
the sensor circuit board could
be damaged!
Current control switch (CS)
ON/OFF per switching chan-
nel
Signal Input (CI)
ESC input from receiver Balancer connector LiXX
for single cell monitoring when using a LiXX-
battery
Connecting the components:
Use the three-core lead to connect the• telemetry socket T on the General Engine-Module to the telemetry
socket T on the receiver. Connect the electronic speed controller to the socket CO.
Use a three-core lead to connect the• socket CI on the General Engine-Module to the recei-
ver socket to which the electronic speed controller would usually be connected.
Current control can be activated and disabled from the transmitter: for this function you need one vacant swit-•
chedchannel.Connecttheassociatedreceiveroutputtothesocket CS ontheGeneralEngine-Moduleusing
a three-core lead.
INC
page 4
40 A
DEC
Current Control
>User Setup :
Current :
On [1500us] : 1500us
On Method : On
Stop[1100us] : 1100us

33610 General Engine-Module - Graupner HoTT 2.4 14
Finally connect the flight battery (IN) and the motor (OUT) to the sensor as shown above.•
Programming the current limiter:
• The maximum current drawn by your drive motor can be programmed under CURRENT.
• Under ON [XXXXus] you should set the throttle position, at which the module’s current limiting function is
to begin. The higher the maximum current, the earlier the activation point for the current limiting function.
The value is programmed by setting the throttle stick to the appropriate position, then pressing the INC +
DEC buttons: the value is then accepted directly on the screen. The value can also be fine-tuned by
pressing the INC or DEC button.
• If you wish to be able to switch current limiting on and off from the transmitter using a switched channel
(socket CS connected), you must program a throttle stick position [XXXXus] under ON METHOD, since
this function is otherwise disabled.
• The </> position can be selected to suit different radio control systems, i.e. if servo reverse is required at
the electronic speed controller.
• Set whether current limiting is to be activated (ON) or disabled (OFF) at ON METHOD. If it is activated
and the maximum current is exceeded, the controller’s current is reduced to the throttle position pro-
grammed under STOP until such time as the current drain falls back below the set value. The current is
then raised again to the selected throttle position, etc. This means that you can fly at one throttle position,
and the current limiting is carried out automatically by the General Engine module; all you will notice is a slight
fluctuation in motor power.
• Under STOP you can program the speed controller’s throttle position to which the current is reduced if the
set maximum current is exceeded; it is best to start with a position just above the neutral setting. Excep-
tion: if you are using a folding propeller, the controller must apply slight brake to ensure that the blades
fold back reliably.
• The value is programmed by setting the throttle stick to the appropriate position, then pressing the INC +
DEC buttons: the value is then accepted directly on the screen. The value can also be fine-tuned by
pressing the INC or DEC button.
•
Example:
Settings: maximum current (CURRENT): 40 A, ON [1500us], current limiting active (On Method: ON) and
controller position (STOP): 1400 us.
When you advance the throttle stick to the full-throttle position (e.g. 1900us) the motor current rises to 65
A. Since the position is above the set 1500us, and current limiting is active, the General Engine module
reduces the motor current by lowering the position to the value programmed under STOP. Once the motor
current is below 40 A again, the module raises the throttle setting again to the value set by the throttle
stick (1900us).

15 33610 General Engine-Module - Graupner HoTT 2.4
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Ppage 13: Min. Power voltage
Qpage 2: Min. cell voltage
Rpage 3: Min. voltage sensor 1
Spage 7: Min. voltage sensor 2
page 5: Min. temperature sensor 1 Tpage 15: Minimum RPM
page 9: Min. temperature sensor 2 U
page 6: Max. temperature sensor 1
page 10: Max. temperature sensor 2
page 4: Max. voltage sensor 1
page 8: Max. voltage sensor 2
Vpage 12: Max. capacity
Wpage 11: Max. current
Xpage 14: Max. power voltage
Ypage 16: Maximum RPM
Z
8. SUMMARY SIGNAL TONES

33610 General Engine-Module - Graupner HoTT 2.4 16
9. TELEMETRY DISPLAY
If you select SIMPLE DATAVIEW the telemetry data can only be displayed, i.e. it cannot be programmed - in
contrast to SETTING AND DATAVIEW. However, the data is represented in graphic form, and this makes it
the preferable option when actually operating a model, as it is easier and quicker to read and assess.
You should also read the manual of your remote control system, especially the chapter „telemetry“. The
operation is done in the transmitter menu „telemetry“ under the display SETTING & DATA VIEW.
Please note: the menus can only be selected when the receiver is switched on. When you switch the recei-
ver on, it may take a few seconds before the receiver display becomes active and can be selected: > symbol
appears at the top right corner of the transmitter display (TX). When the receiver is off, the error message
„Can‘t receive data“ appears.
There may be a slight delay in the screen’s response to inputs using the top buttons, since all the settings
are transmitted directly to the receiver by wireless means.
Operation with the SMART-BOX:
Switch the transmitter on: the start screen of the SMART-BOX displays SETTING AND DATAVIEW / MODEL
SELECT. Use the INC or DEC button to move the arrow cursor to MODEL SELECT, then press ENTER to
switch to the graphic representation of the telemetry display.
Please note: these menus can only be selected if the receiver is already switched on. After you switch the
receiver on, note that it may take several seconds before the display becomes active, and can be selected.
There may be a slight delay in the screen’s response to inputs using the top buttons, since all the settings
are transmitted directly to the receiver by wireless means.
Once you have selected MODEL SELECT, the Smart-Box displays the telemetry menu. You must then select
the appropriate sensor using the arrow cursor, depending on whether you are operating a model aircraft
(AIRPLANE) or a model car (CAR).
It is possible to select any of the displays, but - as you would expect - the unit can only display those parame-
ters for which sensors are actually installed in the model; all the other parameters display the value 0.
Use the INC () or DEC () button to move the arrow cursor to AIRPLANE (model aircraft) or CAR (model
car), then press ENTER (SET) to move to the corresponding telemetry display.
In the aircraft display (AIRPLANE) you can use the INC or DEC button to select one of the following graphic
displays:
RECEIVER: shows the same data as RX DATAVIEW
RECEIVER + GENERAL MODULE: + two additional sensors. As RX DATAVIEW, As RX DATAVIEW, but
plus rotational speed (RPM), altitude (ALT), current
The right third of the display is shown alternately.
0.0V
BATT1
BATT2
0.0V T2 +20°C
T1 +20°C
E FUEL F
ALT
+500m
0m
|s
0m 3s
POWER-V
25.3A
12.5V
80.0Ah
m
0.0V
BATT1
BATT2
0.0V T2 +20°C
T1 +20°C
E FUEL F
CELL.V
1:0.00
2:0.00
3:0.00
4:0.00
5:0.00
6:0.00
12500

10. Firmware Update GENERAL ENGINE-MODULE
Firmware updates for the General Engine-Module are transferred conjunction with a PC running Windows
XP, Vista or 7. For this you also require the USB interface, Order No. 7168.6, the adapter lead, Order No.
7168.6A and a Y-cable Order No. 3936.11 which are available separately.
The programs and files required for this are available from www.graupner.de in the Download area for the
corresponding products.
Install the Firmware Update Utility Graupner and the USB drivers on your computer. Check the system
requirements!
The first step is to cut through the central red wire in the adapter lead, Order
No. 7168.6A, then connect the lead to the USB interface, Order No. 7168.6.
This socket is also polarised; note the small chamfer on one edge. Never use
force - the plug should engage easily and fully.
10.1. General Engine-Module
Disconnect the 3-pin lead of the General Engine-Module from the receiver. Connect the male connector of
the Y-cable in the free socket (T) of the General Engine-Module. In one female connector of the Y-cable the
adapter cable to the USB interface is plugged, into the second connector a suitable receiver battery to power
the update process is connected. Caution: Plug in the receiver battery after pushing the „Program“ button
(see point 10.2), or use a switch harness.
17 33610 General Engine-Module - Graupner HoTT 2.4
Parameter Description
BATT1 / BATT2 Battery 1 / Battery 2 (socket 5 / 7)
FUEL Fuel level / Fueltank Indicator (socket 10)
E / F Empty / Full
T1 / T2 Temperature of sensor 1 / sensor 2 (socket 5 / 7)
CELL.V Cell Volatge of cell 1 … max. 6 (socket 6)
>12500< Current RPM (socket 9)
ALT Current altitude (not available)
0m|s m/1 s climb / descent (not available)
0m|3s m/3 s climb / descent (not available)
POWER-V current voltage of drive battery in V•
electric current of drive battery in A•
Used capacity in mAh since the start•
(socket 1)
Multiple sensors, for example GPS and General module, can be connected to the receiver via a Y-cable
order No. 3936.11 from software version V2.x or higher for the module, receiver and SMART-BOX.
Attention: When using the Y-cable plugged into the telemetry connector on the receiver for connecting mul-
tiple sensors, only the SIMPLE DATA VIEW or MODEL SELECT can be used, because only in this mode
the sensors are addressed correctly.
The SETTING AND DATAVIEW mode for programming can not be used!
First the sensors must individually programmed, for example directly with the SMART-BOX.

33610 General Engine-Module - Graupner HoTT 2.4 18
10.2. Update procedure
Ensure that the adapter lead is configured as shown in the illustrations, and are connected.
Start the Graupner Firmware Update Utility.
Under [COM Port Setup] select the cor-
rect COM port, i.e. the one to which the
USB lead is connected. If you are not
sure of this, press the button „Search“
and select in the pop-up window „Silicon
Labs CP210x USB to UART Bridge“ and
press „OK“. Select Baud Rate 19200.
Under [Interface Type] click on Signal
2:Vcc 3:Gnd.
Now click on the “Browse” button and
select the folder containing the pre-
viously loaded firmware file ending in
*.bin. If everything is correct, the file will
appear in the corresponding window.
The firmware files are encoded in pro-
duct-specific form, i.e. if you acciden-
tally select a file which does not match
the product (e.g. transmitter update file instead of receiver file), then the pop-up window “Product code error”
will appear, and you will not be able to start the update procedure.
Press the “Program” button in the software. Wait briefly until you see movement in the progress bar. This
make take up to five seconds, depending on the computer.
Switch on the power supply (see 10.1), so that the General Engine-Module is powered on.
After a few seconds the Status screen displays the message “Found target device…”; you can now release
the button, and the firmware update process commences.
If the device is not recognised, if the pop-up window “Target device ID not found” appears, or if the process
fails before 100% is reached, you must restart the update procedure. Repeat all the steps as described
above.
The Status display and the Progress bar show the progress of the firmware update. The update is completed
when the message “Complete…100%” or “Complete!!” appears.
Switch off the power supply and disconnect all leads from the Y-cable. Connect the General Engine-Module
with the receiver again.

Input voltage
max. 60 V DC
resolution 10 mV
accurancy 1 %
Current
Shunt resistance 0.0005 Ohm
continous current 40 A (G3.5 connector)
5 A (JR-connector)
peak current (1 s) 60 A (G3.5 connector)
15 A (JR-connector)
resolution 0.1 A
accurancy 1 %
Capacity max. 30.000 mAh
resolution 1 mAh
Temperature
Sensor 1 / 2
range - 20° C ~ 200° C
resolution 1° C
Voltage
Sensor 1 / 2
max. 60.00 V DC
resolution 10 mV
accurancy 1 %
LiXX cell voltage
Max. number of cells 6
resolution 10 mV
accurancy 1 %
RPM range up to 200.000 rpm
resolution 10 rpm
Fuel display 0 %, 25 %, 50 %, 75 %, 100 %
11. SPECIFICATIONS GENERAL ENGINE-MODULE
19 33610 General Engine-Module - Graupner HoTT 2.4
The current version of this manual is available on the Graupner website www.graupner.de under
Order No. 33610