Sennheiser HMEC 460 manual Powering the NoiseGard active noise compensation

Powering the NoiseGard active noise compensation

There are three options for powering the NoiseGard active noise compensation:

1.Connection to the on-board DC power supply system (12–35 VDC)

2.Connection to the cigarette ligther socket (12–35 VDC) via an adapter cable (optional accessory)

3.Power supply via two AA batteries (not included) inserted in the operating control

The supply voltage for the NoiseGard system is processed by the in-line electronics in the connecting cable.

CAUTION! Danger of short circuit!

In the unlikely case of a fault, a short circuit could occur.

￿ Before switching NoiseGard on, ensure that the aircraft electrical circuit which supplies the headset from the on-board DC power supply system is protected by a 1 A fuse.

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