Fail-Safe Function; Receiver; Connections - GRAUPNER HOTT GR-32 Manual

on first for the modules Order No. 33300, 33301 and 33302). Any telemetry sensors installed in the
model must be connected to this unit, as only the Master receiver transmits sensor
data using the downlink channel. The second and all further receivers operate in parallel with the Master
receiver but in Slave mode, with the downlink channel switched off.
The control functions can also be distributed amongst multiple receivers; this is carried out using the
Channel Mapping function of the SMART-BOX (Order No. 33700). In the same way it is possible to as-
sign one control function to multiple receiver outputs; a typical example would be the use of two servos
for each aileron instead of only one, etc.

2.3. Fail-Safe function

In its default state (as delivered) the receiver is set to "Hold" mode, i.e. if a fail-safe situation occurs, all
the servos connected to it maintain the last position detected as valid. In this mode the green LED on
the receiver starts flashing when interference occurs, and the red LED on the transmitter goes out. The
transmitter also starts beeping about once per second as an audible warning.
You can exploit the safety potential of the fail-safe option by at least programming the throttle channel to
respond to a fail-safe situation: the throttle channel of an engine-powered model should be set to idle,
the throttle channel of an electric-powered model to "stop", and the throttle channel of a model helicopter
to "Hold". If interference should occur, these settings will help prevent the model flying out of control,
possibly causing personal injury or property damage.
Please refer to the appropriate section in your RC system instructions for the procedure.

3. RECEIvER

Battery socket „B"
Servo sockets
7-12/15-16
Battery socket „B"
Socket for
sum signal „S"

3.1 Connections

Plug the servos into the row of sockets on both sides of the receiver. The connector system is polarised;
note the small chamfer on one edge. Never use force - the plugs should engage easily and fully. The
socket polarity is also marked on the case: brown wire (-), red (+) and orange (signal).
The servo sockets of the Graupner-HoTT 2.4 receiver are numbered. It is also possible to program
socket „S" for the sum signal using the SMART-BOX (Order No. 33700). This is important for certain
optional devices which require this signal.
Power supply
The sockets marked "- +/B" are intended only for the battery connection. Connect the power supply
preferably with the socket(s) that are close to the servos. When using High Power servos you may use
all battery connectors depending on the battery power, when necessary with three PRX-receiver power
supplies.
If you connect to each battery terminal a separate battery, make sure that the batteries have the same
rated voltage and rated capacity. Do not connect different types of batteries or batteries with highly dif-
ferent charging states, because this may lead to short-circuit-like effects. Use in such cases, for safety
reasons, voltage stabilizers like the PRX-5A-receiver power supplies (No. 4136) between the battery
and receiver.
Manual Receiver GR-32 Graupner HoTT 2.4
Battery socket „B"
Servo sockets
1-6/13-14
Battery socket „B"
02