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| Bendix/King | |||
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| KMA28 |
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| Audio Amplifier/Intercom/Marker Beacon Receiver | ||||
Appendix B Bottom Connector Interconnect | ||||||||
| Communications |
| Com 1 Audio Hi |
| 9 | Bottom Connector, J1 | ||
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| Com 1 Lo |
| P | Notes: | |||
| Transceiver #1 |
| Com 1 Mic Audio Hi | 1. Pins 7, U, and X not used. | ||||
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| Com 1 Mic Key |
| R | |
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| 2. All shields should be grounded | ||
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| Com 1 Spr Load |
| 19 | |
| Com 1 SPR Load |
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| at audio panel only. | ||||
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| Com 1 Spr Load |
| L | ||||
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| See Note 8 |
| Other end remains floating. | |
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| Com 2 Audio Hi |
| 10 | 3. Speaker and Pilot Headphone |
| Communications |
| Com 2 Lo |
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| ground returns MUST be kept | ||
| Transceiver #2 |
| Com 2 Mic Audio Hi | H | separate and connected to pin 22. | |||
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| Com 2 Mic Key |
| V | 4. All Power, and Ground wires must be #18 gage wire |
| Com 2 SPR Load |
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| Com 2 Spr Load |
| 16 | Lighting #22 AWG, other wires minumum #24 AWG | |||
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| Com 2 Spr Load |
| M | 5. Pilot mic and headphone jacks |
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| Com 3 Audio Hi |
| J | |
| Communications |
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| must be isolated from ground. | ||||
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| Com 3 Lo |
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| Transceiver #3 |
| Com 3 Mic Audio Hi | K | 6. Pin 20 connected through a 3 A breaker. | |||
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| Com 3 Mic Key |
| 15 | 7. PA Mute is a TTL level logic output |
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| J3 |
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| 14 | that is pulled low when PTT active. |
Note 10 | AirCell | V |
| Cellphone A |
| 8. Speaker loads may be reqired on some | ||
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W |
| Cellphone B |
| N | transceivers. Consult manufacturer's information. | |||
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| K |
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| 9. 28V installations require a 3 A breaker. |
| VHF Nav 1 |
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| Nav 1 Audio Hi |
| 12 | 10. Interface information shown for AirCell phone only. | |
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| NAV 1 Audio Lo |
| Ground shield at J3 only. | |||
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| VHF Nav 2 |
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| Nav 2 Audio Hi |
| 13 | 11. All shielded wires must be MIL 22750 or 27500. | |
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| Nav 2 Audio Lo |
| 12. Connect pilot headphone (L) to top connector, Pin 1, | |||
| Ext. Mkr Audio |
| Mkr Audio In Hi |
| 21 | using | ||
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| Mkr Audio In Lo |
| 13. Key pin between pin 7 and 8. | ||||
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| ADF Receiver |
| ADF Audio Hi |
| S |
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| ADF Audio Lo |
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| DME Receiver |
| DME Audio Hi |
| 6 |
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| DME Audio Lo |
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| AUX Audio |
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| AUX Audio Hi |
| 11 |
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| AUX Audio Lo |
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| Unswitched Audio #1 |
| Unswitched Input #1 Hi | T |
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| Unswitched Audio Lo |
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| Unswitched Audio #2 |
| Unswitched Input #2 | Hi | 17 |
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| Unswitched Audio Lo |
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| Pilot Mic Audio Hi | 8 |
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| Pilot Mic PTT |
| Y |
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| Pilot Mic Lo |
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Pilot PTT |
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| Pilot Phones (L) |
| 3 | To Pin 1 | ||
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| Pilot Phones (R) |
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| Pilot Phones Lo |
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| Top Conn. | |
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See Note 3 |
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| Speaker Hi |
| W | See Note 12 | ||
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| Speaker Lo |
| 22 |
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Annunciator |
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Ext. Marker Lamp (Blue) |
| Blue Lamp Output |
| 5 |
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| Ext. Marker Lamp (White) |
| White Lamp Output |
| C |
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Marker | Ext. Marker Lamp (Amber) |
| Amber Lamp |
| 4 |
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Ext. |
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| MM Sense |
| 2 |
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MKR Ant.MM Sense Output |
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| B |
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| A |
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| 28 Volt Lights Hi | F |
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| See Note 7 | 14 V Lights Hi | D |
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| Lights Lo | E |
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| PA Mute Trigger |
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| 18 |
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| 2A (14VDC) | See Note 4, 9 | 20 |
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| 3A (28VDC) | 1 |
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| See Note 4, 9 | Ground |
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| Airframe Ground | Z |
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| Appendix B | Rev. 0, Sept. 2000 | ||||