Bendix/King
KMA 28B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
D201106000060
Page 1-3
June 2011
Audio Selector Specifications
Audio selector panel input impedance
:
510
Input Isolation
:
-60 dB (min.)
Speaker Muting
:
-60 dB (min.)
Speaker Output
(into 4
) with no clipping
14 VDC:
28 VDC:
3 Watts (min.)
10 Watts (min.)
Receiver Inputs
:
9 (Com 1, Com 2, Com 3, Nav 1, Nav 2, ADF,
DME, MKR, AUX)
Unswitched Inputs
:
4
Transmitter Selections
:
5 (Com 1, Com 2, Com 3
Com1/2, Com1/3)
Speaker Impedance
:
4
Headphone Impedance
:
150 – 1000
Headphone Output
:
38 mW each headset, no clipping <1% THD
Microphone Impedance
:
150 - 600
Intercom Specifications
Intercom Positions
:
6 places (with individual
Intelli
Vox® circuits)
Music Inputs
:
2, (Independent, Stereo)
Music Muting
:
>-30 dB "Soft Mute" when Com or intercom active.
Distortion:
<1% THD @ 38 mW into 150
Mic Freq. Response, 3 dB:
300 Hz - 6000 Hz
Music Freq. Response, 3 dB
:
20 Hz - 18kHz
MARKER BEACON RECEIVER: (if equipped)
Frequency
:
75 MHz Crystal Controlled
Sensitivity
:
Low:
High:
Capable of: (preset at factory for field application)
1000
Volts (Hard) (360 to 570
V soft)
200
Volts (Hard) (130 to 200
V soft)
Selectivity
:
-6 dB at ±10 kHz
-40 dB at ±120 kHz
External Lamp Output
:
7.5 (±4 VDC unloaded, at maximum brightness) VDC
positive when active, max. current 125 mA
MM Sense
:
Active high (4.5 ± 1.0VDC)
1.6
EQUIPMENT SUPPLIED
1 ea. of the following units:
Model
Description
Honeywell Part Number
Stereo intercom.
KMA 28B Installation Kit: 250-007-0002
Description
Quantity
PS Part
Number
Installation rack assembly
1
071-00164-0001
Top Molex Connector Shell w/key, 44 pin, key 4/5
1
120-425-4402
Bottom Molex Connector Shell w/key, 44 pin, key 7/8
1
120-425-4400
Gold Plated Crimp Pins
88
425-001-0002
4 40 X 7/16 screw w/nylon patch
4
475-440-0007
Grounding bar
1
430-007-0001
6-32 X 3/4 pan head Phillips screw
2
475-632-0038
6-32 Nut Flat
2
475-632-0003
KMA 28B KMA 28B Audio Panel with Marker Beacon and
066-
0
1211-0000