PS Engineering PM1000II 11906 - Manual (Page 2)

May 2010 Page 2 200-124-0100 PM1000II Specialty Intercom Manual Page 2 May 2010
Section I General Information
1.1 Introduction
The PM1000II, is a panel mounted, 4-place
monaural intercom system (ICS). Please read this
manual completely before installation to minimize the
risk of damage to the unit and to become familiar with
all the features.
1.2 Scope
This manual contains installation and operational
instructions for the following PS Engineering units:
Part Number Description
11906 w/Pilot ISO and Internal Recorder System (IRS)
11908 Same as above w/internal crew function
1.3 Description
The PM1000II is a 4-place, panel mounted
intercom with individual volume and squelch controls
for the pilot and copilot. The copilot's squelch control
adjusts the trip level of the copilot and passengers.
A front panel mode switch allows the pilot to
select multiple intercom configurations:
"ISO" mode isolates the pilot from the intercom
and connects to the aircraft radio. The passengers can
continue to communicate with each other and listen to
entertainment without distracting the pilot. They do
not hear radio communications.
"ALL" mode places all headsets on a party line.
Each one hears aircraft radio, entertainment and can
use the intercom.
“CREW” (11908 only) allows the pilot and
copilot positions to hear the aircraft radios and use the
intercom, while the rear passengers can have their own
intercom conversation without disturbing the crew.
This also activates music 2 input.
The PM1000II has an automatic fail-safe
interconnect to the aircraft radio. If power to the
intercom is disrupted, an internal relay will connect the
pilot's headset to the aircraft radio. This allows
continuous radio communications. Note: The copilot
will no longer hear aircraft radio when power is
removed.
The 2-color LED shows green when power is on
and red during radio transmissions. This functions as a
stuck mic indicator.
An auxiliary input is provided, allowing the pilot,
copilot and passengers the option to listen to music
during flight. During intercom or aircraft radio activity,
this music is automatically muted to allow
communications without distraction. When the activity
ceases, the Soft Mute circuit will gradually return the
music to the original listening volume.
The "ISO" mode provides uninterrupted aircraft
radio communications for the Pilot. Because the pilot's
intercom volume control does not affect the aircraft
radio volume, it is possible to select various balances
of volume level between the ICS and the aircraft radio
while in the ALL mode. Reducing the intercom
volume, the pilot places the aircraft radio in the
foreground while the ICS is in the background.
Both pilot and copilot have transmit capabilities
over the radio. The PM1000II allows only the person
who presses their PTT to be heard over the aircraft
radio. If both pilot and copilot press the PTT at the
same time, the copilot will override (Ideally suited for
training environments). Pilot regains priority by
switching the unit off.
1.4 Approval Basis *None*
The PM1000II, part numbers 11906 and 11908
are NOT FAA Approved. It is the installer’s
responsibility to determine suitability for use.
1.5 Specifications
Input power: 13.8 - 27.5 Volts DC
Current Drain: < 250 mA (Externally fused at 1 Amp)
Headphone Impedance: 150-1000 ohms typical
Audio Distortion: <10% @ 75 mW into 150

load
Aircraft Radio Impedance: 1000

typical
3 dB Music Frequency Response: 200 Hz to 15 kHz
Unit weight: 12 Ounces (0.342 kg)
Dimensions: 1.25" H x 2.60" W x 5.50" D
(3.2 x 6.6 x 14 cm)
Temperature -20ºC to +55ºC
Altitude 50,000 ft.
1.6 Equipment required but not
supplied
A.Headphones, 150

monaural, up to four as
required
B.Microphones, up to four, as required
C.Interconnect wiring
D.Circuit Protection 1 Amp.
1.7 License Requirements
None
Section 2 Installation
2.1 General Information
The PM1000II comes with all necessary
hardware for installation.
Installation of the PM1000II, using hardware
supplied, and the wiring available separately from PS
Engineering or approved sources, does not require
special tools or knowledge other than described in
FAA Advisory Circular 43.13-2B. It is the installer's
responsibility to determine the approval basis for this
installation.
2.2 Unpacking and inspection
The PM1000II was carefully inspected
mechanically and thoroughly tested electronically
before shipment. It should be free of electrical or
cosmetic defect.
Upon receipt, verify that the parts kit includes
the following:
2.3 Equipment installation proce-
dures
1.Using the template, drill six holes in the instrument
panel in a location convenient to the pilot position
(s).
2.Insert the PM1000II from behind the instrument
panel, aligning the holes for the knobs, LED, and
switch.
3.Place the aluminum face-plate over the knob shafts
and secure, using the two # 4-40 round head screws
provided.
4.Install the knobs over the volume and squelch control
shafts.
2.2 Cable harness wiring
To complete the installation, a wire harness must be
made as shown in Appendix D.
PS Engineering can make a custom-tailored wiring
harness for the installer. All harnesses use Mil-spec
quality components with professional techniques, and
are fully tested before shipment. Contact PS Engineering
for more information.
If the aircraft already has pilot and copilot headset
jacks installed, you may re-use them. Remove and
discard all wires from the copilot headset jacks. You
may use the existing pilot headset jacks as the Auxiliary
Aircraft Radio Headset Jacks, but they should be moved
to a new location to avoid confusion with the pilot's
headphone jacks. In the event the intercom has to be
removed for any reason, these jacks provide access to
the aircraft radio system.
PM1000II, p/n 11908, Front Panel
NOTE: Auxiliary microphone and headset jacks
are required for a complete installation. These
provide troubleshooting and a back-up access to the
aircraft radios.
Part Number Description Quantity
475-442-0002 #4-40 Machine screws, black 2
625-002-0001 Concentric inner knobs 2
625-002-0002 Outer knobs w pointer 2
425-025-0095 25 pin Sub-d Shell 1
625-025-0001 Connector hood 1
5 7 5 - 0 0 2 -0 0 0 4
575-002-0002 Reversible aluminum face plate
Reversible face plate w/crew 11906
11908
11910 4-place mono jack kit (incl. phones and
mic jack, insulating washers and 1/8”
music jack) 1
200-124-0100 Operator's and Installation Manual WEB
122-102-0001 Drill Template 1
425-020-5089 Male Pins—Crimp 25
PM1000II Hole spacing (Not to scale)