Electronic safety switch harnesses for the receiving system. The switch harness
is an important component in the airborne power supply chain, with significant
safety implications. Conventional switch harnesses featuring a purely mechanical
switch are prone to failure, and therefore constitute a safety risk. The danger is
that the switch contacts may fail after a period of use due to ageing effects (vibration,
wear or corrosion). At the same time, the requirements placed on switch
harnesses are constantly rising due to the high power consumption of modern
high-performance servos. Many conventional mechanical switches were never
designed for such loads. MULTIPLEX SAFETY SWITCH switch harnesses are an
excellent solution to this problem, and were designed with safety as top priority.
The receiver battery (4 - 5 NiXX cells) is connected directly to the switch circuit
board, while the connection to the receiver takes the form of a short, direct currentbearing
cable without any mechanical switching element. The switching function
itself is carried out by high-performance FETs, which are extremely reliable and
vibration-resistant. Compared to mechanical switches, these high-performance
FETs have very low internal resistance. In conjunction with high-quality goldcontact
connectors and cables of large cross-section (for minimum losses), today's
powerful servos can finally unleash their full potential performance.
A conventional mechanical slide switch is used as the ON / OFF switching element,
as this makes it very simple to check its operational status (ON / OFF) at
a glance. However, the slide switch only provides the ON / OFF switching signal,
i.e. the load current does not flow through this switch at all. The slide switch can
be mounted in any position on the model, and there is no drawback to extending
the connecting lead by any amount if you so wish. If a fault should occur in the
slide switch or its connecting lead, the electronic circuit reliably maintains the
last active switched state (ON / OFF).
MULTIPLEX SAFETY SWITCH switch harnesses are deliberately of simple, robust
construction. Only the absolutely essential components are used in the design,
in order to keep the failure risk as low as possible.
The MULTIPLEX SAFETY SWITCH 6 represents a low-cost alternative to simple
conventional switch harnesses.
The MULTIPLEX SAFETY SWITCH 12 can cope with more stringent requirements:
servo socket) for twice the conductor cross-section and twice the number of
- Max. continuous current of 12 A
- High-current multi-pin M6 battery connector at the input end
- 2 x UNI leads (for connection to the receiver's "Batt" socket and any vacant
The MULTIPLEX SAFETY SWITCH 12HD is equipped with durable, high-current
MULTIPLEX M6 connectors both at the battery side and the receiver side. This makes
it possible to connect the switch directly to the new MULTIPLEX RX-9-SYNTH DS MPCM
and RX-12-SYNTH DS M-PCM receivers, which feature integral M6 connectors
for the power supply.