PS Engineering PMA7000B Specifications download pdf (Page 12)

PS Engineering

PMA7000B Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

200-780-0005 Page 2-5 Rev. 11, February 2015

3/32" Cellular Jack

COM 3 Mic Input

Com 3 Audio

Audio Lo

7000B

Bottom Connector

Cellular Plug (typical)

Tip= Microphone out

Ring= Speaker audio

Base=Ground

For Duplex (cell phone) operation

Pin J of top connector MUST BE GROUNDED

This is a typical interconnect

PS Engineering does not guarantee

compatability in all cases.

Cellular Phone

Interconnect

Figure 2-2 Cellular telephone interface

Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement

action, which may include a $10,000 fine per incident.

FCC Regulation 47 CFR § 22.925 Prohibition on airborne operation of cellular telephones.

Cellular telephones installed in or carried aboard airplanes, balloons or any other type of aircraft

must not be operated while such aircraft are airborne (not touching the ground). When any aircraft

leaves the ground, all cellular telephones on board that aircraft must be turned off.

PS Engineering, Inc. does not endorse using unapproved cellular telephone equipment in flight, and

takes no responsibility for the user’s action.

2.4.8 Transmit Interlock

Some communications transceivers use a transmit-interlock system. To fully utilize the Split Mode feature,

this function must be disabled. Consult that manufacturer's installation manual.

2.4.9 "Swap" Mode

When a momentary, normally open, push-button switch is connected between pin 10 on the top connector

and aircraft ground, the user can switch between Com 1 and 2 by depressing this switch without having to

turn the mic selector switch. This yoke-mounted switch eliminates the need to remove your hands from the

yoke to change transceivers. The transfer of TX indication from Com 1 to Com 2 shows that the swap has

been initiated, there is no dedicated swap indicator.

2.4.10 Backlighting

The PMA7000B has an automatic dimming of the pushbutton annunciator LEDs and marker lamps con-

trolled by a photocell. Control of the unit backlighting is through the aircraft avionics dimmer. Connect the

dimmer control line to J1 pin D for 14 volt systems, and to J1 pin F for 28 volt systems. Pin E is light

ground.

If an external dimmer control is not used, a constant low level back light illumination can be established for

nighttime viewing. Pin D or F (depending on system voltage) must be tied to power (J1, pin 20) for the back

lighting system to work. The photocell mounted in the unit face will automatically adjust the intensity of the

push-button annunciator LEDs.

2.4.11 Unswitched inputs

J1, pins T, 17, U and X are unswitched, unmuted inputs. These inputs are presented to the pilot and copilot

regardless of the audio configuration, and will always mute the entertainment inputs. These 510 Ω inputs

can be used for altimeter DH audio, GPS waypoint audio, autopilot disconnect tones, or any other critical

audio signal. J1Pin T is provided to the pilot’s headset even when the unit is off, or in fail-safe mode.

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PS Engineering PMA7000B Specifications Page 12

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