Becker BD406 - Inputs; Outputs; Figure 24: PBD406 - Connector P2 (Front Side); Headphone; Speaker Output (HDPH); Device Connector J6

Installation
Becker Avionics
Electrical Interface
52 BD406/PBD406 DV16401.03 Issue 04 May 2021
Headphone / Speaker Output (HDPH)
Position P2:
Figure 24: PBD406 – Connector P2 (front side)
• Connector P2 is internally connected to the related pins of P1 connector (BD406) see
"Device Connector P1 - Digital and Analog I/Os" page 46.
• If /GPI_0 pin on P2 connector is used, the pin is in active state if connected to the
SPKR- pin.
• HDPH+/HDPH- pins are for high impedance headsets.
• SPKR+/SPKR- pins are for low impedance headsets.
Device Connector J6
Position J6:
Type: DB-25 D-SUB, 25 pol. female connector, slide-in fastener.
The pin assignment of the device connector J6 on the rear side is equal to J1 connector of BD406
(see "Device Connector J1 - Serial Interfaces" page 48).
Inputs / Outputs
The wiring of BD406 with and without control head is different, for details see connector tables:
• "Device Connector P1 - Digital and Analog I/Os" page 46.
• "Device Connector J1 - Serial Interfaces" page 48.
Speaker Connection
Pin
Type
I/O
Name
Function
Remarks
14
Analog
O
SPKR-
Speaker output return signal.
On GND potential.
Speaker output is unbalanced.
P1 connector
15
Analog
O
SPKR+
Speaker output signal
P1 connector
The speaker output has a nominal 4 W into 4 Ω load. For best performance use a pair of shielded
wires and wiring path as short as possible.
It is recommended to install the speaker and wiring shields isolated from aircraft frame to prevent
ground loops. Pin 14 SPKR- is internally connected to the GND potential.
Caution: The magnetic field of a speaker can influence the magnetic compass.
Obey the requirements "Installation Requirements" page 37. After speaker installation examine
accuracy of the compass operation.
5 4
3
2
1
HDPH-HDPH+
/GPI_0 SPKR-
SPKR+
P2