The T75 is a high performance digital dual redundant power switch with advanced
telemetry features and touch switch functionality. It combines a backup battery charging circuit
and telemetry with Touch w/LED (Included), optional Sliding, Wireless (R3/RSW) or mechanical
switch functionality in a single device.
The T75 is ideal for mid-size models where high-voltage servos are used without voltage
stabilization. It provides telemetry and monitors Voltage/V, Capacity/mAh, and Current/A (Dual Rx Batteries, or
BEC w/Backup Battery) of both power inputs.
The T75 is suitable for models equipped either with dual receiver batteries, or with ESC
battery eliminator circuit (BEC) used as a primary power source, combined with a small backup
battery. The device prefers its primary battery input, while in case of voltage drop it automatically
switches to the secondary input. The charging circuit may be optionally enabled to charge the
secondary backup battery from the primary input/BEC.
If using with R3/RSW Wireless Switch you have to change setting of the T75 from "Touch"
to "Standard" setting. For long term storage backup battery has to be disconnected due to constant
load of the R3/RSW Wireless Switch.
The T75 is designed to turn ON/OFF the electronics in your model, it can replace a mechanical
switch as well. The device remembers its last operating state, and if the battery is accidentally
disconnected, the T75 will automatically boot up again as soon as the battery is connected again.
Specifications and Features
- Intelligent dual battery backer/multiplexer with configurable voltage switchover threshold.
- Touch switch function (Included), Optional Mechanical, Sliding or Wireless (R3/RSW).
- Jeti Duplex EX, Futaba S.Bus2, Multiplex MSB, Graupner Hott, PowerBox telemetry support.
- Optional charging of the secondary/backup battery with capacity protection limits.
- Remembers the last operating state if the battery is accidentally disconnected.
- Two telemetry expansion ports that allow connecting additional Duplex EX/EX Bus sensors.
Continues/Peak Current: 20A/40A (Continues/2 Seconds)
Operational Voltage: 4-12.6V (Recommended 5-8.4V)
Supported Systems: Jeti EX, Multiplex M-LINK, Graupner HoTT, Futaba S.Bus/S.Bus2, PowerBox
Dimensions: 56mm x 36mm x 16mm
Weight: 55g
The T75 generally uses its primary battery input B1 as a main power source. If the
B1 voltage drops below the configured Voltage threshold value, it can switch to the B2 input. In
such case the source with higher voltage will be used. As soon as the B1 voltage returns back
above the threshold value (+ additional hysteresis), the T75 switches automatically back to B1,
no matter the voltage of B2 input. There are several applications where the user can
benefit from the T75.
ESC/Battery Combination: Set the Voltage threshold value below the voltage of the battery
eliminator circuit (BEC). In this case, the BEC output will be used exclusively while the secondary
input (B2) will act just as a backup battery. Please note that both the ESC BEC and the backup
battery must handle the full load of the attached servos.
Equal Dual Battery Discharging: Set the Voltage threshold value above the maximum battery
voltage. Both batteries will be discharged equally keeping equal voltage. The batteries have to be
of the same chemistry, number of cells and similar capacity.
Backup Battery Charging: The T75 contains a simple battery charging circuit designed
for 2S Li-xx without balancing. The charging may be optionally enabled to keep the backup battery (B2) always
ready without the need to remove it from the model (however, we recommend to charge the battery
with a balancer at least once in a month). Several safety conditions are used during the
charging (See .pdf manual for details).
More information (links):
* Instruction Manual (.pdf)
* Click Here for Firmware Updates & MAV Manager
