DPS Splitter 18 S.BUS

ACT DPS Splitter 18 S.BUS

Item number: 01008009
EAN: 0805627060303

The DPS Splitter 18 S.BUS is designed for the high current supply of Futaba S.Bus receivers and S.Bus servos. The servos are usually connected to the appropriate sockets (contact is pin) in the receiver. These supply the servos with power and with the position and control signal. A single plug-in input on the receiver is then responsible for connecting the battery or switch cable. If several servos are to operate simultaneously with a lot of power and/or high speed, this generally poses a problem for the power supply to the servos, because power and speed always go hand in hand with high current requirements.

This current demand cannot be sufficiently provided for the battery via the single plug-in connection on the receiver, so a "bottleneck" is created for the necessary servo current. When this is needed, the voltage collapses, the servos become less powerful or slower, or both. In the worst case, they even stop and the receiver fails. Depending on the current requirement.

Principle of battery backer
Battery backers are used to provide redundant power supply to a system by using a second battery. This results in "battery redundancy". Two batteries are used so that in case of failure of one battery, the other battery maintains the power supply of a system. In principle, this would be easy to solve by simply connecting a second battery to the system in parallel. Unfortunately, "Ohm's law" gets in the way: current always flows from a higher voltage to a lower voltage... So from the battery with the higher voltage to the one with the lower voltage - always. Two batteries will never have the same voltage or load capacity. Thus, the current of the better battery does not flow to the system, but to the "worse or empty battery". This usually leads to the complete destruction of both batteries and to a crash of the model.

The ACT high current battery splitter system therefore solves the following problems:
- The servos with high current requirements are connected to the battery splitter, no longer to the receiver.
- One splitter has two high-current connections for two receiver batteries due to the built-in battery switch; their voltage is then fed (via the built-in battery switch) directly and without loss to the servo sockets on the splitter.
- The position and control signal for the servos is routed separately from the receiver to the individual plug-in connections. To enable the receiver to work, it receives its voltage from the splitter via a single patch cable. ( S.BUS signal, all in parallel )
- The position signal is routed separately to the plug-in connections of the splitter. Either via the S.BUS with Futaba receivers, or via patch signal cables when using receivers other than Futaba.
- The operating current for servos and receivers is thus "split".

Why high current for servos, what happens if there is an undersupply?
- For the large, dynamic, very short fluctuations of the current demand (current peaks) of today's servos, an unhindered current supply to the servo is necessary, therefore not only high-current batteries must be used, but also connectors and cables must be able to supply the high current to the servo sockets.
- This is one reason why any voltage regulation works rather inadequately, it is always "slower" than the fast (dynamically) fluctuating current demand of the servos, and slower than a high-current battery, which can certainly supply these current peaks.
- Modern servos, however, need precisely these current peaks in order to be able to deliver their actual power. Therefore, there is nothing better for powering such servos than to lead the battery voltage to the servos in the most direct way, without any voltage regulation or other resistances such as unsuitable plugs or long or thin cables.
- The best way to adapt to different servo voltages is to use the appropriate battery types. LiFe batteries for all servos, or LiPo batteries for LiPo(HV) servos. This means that voltage regulation is not necessary.

Technical data:
- Splitter: 18 S.BUS
- Servo outputs: 18
- S.BUS outputs/inputs: 2
- Battery connection: 2x XT60
- Continuous current max: 120A
- Voltage range: 5-8,4V
- Input voltage = Output voltage
- Dimensions: 87x82x17mm
- Weight: 136g

Features:
- DPS splitter for high current supply of receiver and servos.
- 18 servo outputs
- 2 S.BUS outputs/inputs
- 2x battery connection XT60

Scope of delivery
DPS Splitter 18 S.BUS (delivery without receiver!)