PS Engineering PMA7000M-S Installation Manual - Manual (Page 14)

PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-070-0012 Page 2-7 Rev. 12, Sept. 2000
2.4.19 Audio Message Acknowledge (J2, Pin W) Option 1 and 2 only)
The audio message installation requires inputs from an external annunciator, such as an Electronics Interna-
tional engine gage system. A falling edge (input pulled low) when applied to the appropriate pin of the con-
nector will cause the message to be played, repeating every two seconds, until the acknowledge (“ACK”)
button is pushed.
Install the “ACK” button in a location convenient to the pilot and copilot position. This switch is a momen-
tary SPST switch between J2 Pin W and ground.
The following table contains information regarding various inputs.
Function EGT or CHT Fuel
Flow or
Level
Oil Pres-
sure or
temperature
Volt/
Amp
RPM Manifold
Pressure
PMA7000 Pin Z 22 Y 21 X 20
Message Number 1 2 3 4 5 6
Option 1
Message Text
“Check tem-
perature” “Check
fuel” “Check
oil” “Check
battery” “Check en-
gine speed” “Check boost”
Other combinations can be created at additional cost.
NOTE: PS Engineering can only provide input information at this time. Approval basis is the responsibility
of the installer. Contact PS Engineering for more information.
2.5 Marker Beacon Installation
The marker beacon receiver is an option included in the PMA7000M-S. Non-marker (PMA7000S) units
can provide audio interface with the external receiver (see section 2.5.4).
2.5.1 Marker Antenna Installation
A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included). Refer
to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2A (or later revision),
Chapter 3, for information on proper antenna installation techniques. The marker beacon antenna must be
mounted on the bottom of the aircraft.
2.5.2 External Marker Lights (7000MS)
For installations that require external marker beacon lights, there are three outputs that can drive 12-Volt
lamps only. The external output lamps are driven high (typically +9 VDC
±
1.5 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell dim-
ming.
2.5.3 Middle Marker Sense (7000MS)
A Middle Marker Sense output signal is available from the 7000M-S to flight control systems. This function
will not operate during the test mode. This output will go to +4.5 VDC (
±
1.0 VDC) when a valid Middle
Marker signal is received. This output is J1, pin 2.
2.5.4 Marker Audio Input (7000S)
If using an external marker receiver, the audio input is J1, pin 21 (MKR input).
2.6 Adjustments
The PMA7000M-S is factory adjusted to accommodate the typical requirements for most aircraft configu-
rations. There are five adjustments however, that will allow the installer to tailor the specific functions.