PS Engineering PM1000II 11922 User Manual
Sound Quality. Sound Engineering.
PM1000
II
FAA-Approved
4-Place, Panel Mounted Intercom
Operator's and Installation Manual
Part Number 11920 (with Crew) and 11922 (without Crew)
FAA-TSO C50c
PS E
Phone (865) 988-9800 FAX (865) 988-6619
NOTICE: In certified aircraft, warranty is not
valid unless this product is installed by an
Authorized
PS Engineering dealer.
NGINEERING, INCORPORATED
9800 Martel Road
Lenoir City, TN 37772
www.ps-engineering.com
Document Number 200-123-0003
Revision 5, Feb. 29, 2012
Revision 5, Feb. 2012 Page 1 200-123-0003
Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS Engi-
neering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800 Martel
PS Engineering, Inc. 2012©
Copyright Notice
Road, Lenoir City, TN 37772. Phone (865) 988-9800
Section I General Information
1.1 Introduction
The PM1000II, is an FAA-TSO approved, panel
mounted, 4-place 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.
PM1000II, p/n 11920, Front Panel
1.2 Scope
This manual contains installation and operational instructions for the following PS Engineering units:
Model Description Part Number
PM1000II 4-place intercom system w/Pilot ISO 11922
PM1000II Same as above w/internal crew 11920
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” (11920 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
The PM1000II, part numbers 11920 and 11922 are
FAA-approved under TSO-C50c.
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 Ω load
Aircraft Radio Impedance: 1000 Ω typical
3 dB Mic Frequency Response: 350 Hz — 6000 Hz
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)
Environmental and technical qualifications:
RTCA DO-160B/DO-170
Temperature -20ºC to +55ºC
Altitude 50,000 ft.
1.6 Equipment required but not supplied
A.Headphones, 150Ω monaural, up to four as required
B.Microphones, up to four, as required
C.Interconnect wiring
D.Circuit Breaker—1 Amp.
PM1000II Operation/Installation Manual Page 2 Revision 5, Feb 2012
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 the available wiring and hardware supplied, does not require special
tools or knowledge other than described in FAA Advisory Circular 43.13-2. It is the installer's responsibility
to determine the approval basis for this installation. An
FAA From 337, or other approval may be required.
See Appendix B for example of FAA Form 337.
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:
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
425-025-00095 25 pin Sub-d connector shell 1
425-020-5089 Male Pins– Crimp 25
625-025-0001 Connector hood 1
575-002-0004
575-002-0002
11910 4-place mono jack kit ,(incl. phones and
202-123-0001 Pilot’s Guide 1
Reversible aluminum face plate
Reversible face plate w/crew
mic jack, insulating washers and 1/8”
music jack)
11922
11920
1
1.2 in
0.838 in
Ø0.125 in
Ø0.265 in
Ø0.25 in
Ø0.375 in
0.32 in
0.5 in
PM1000II Hole spacing (Not to scale)
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.
2.4 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.
NOTE: Auxiliary microphone and headset
jacks are required for a complete installation.
These provide troubleshooting and a back-up
access to the aircraft radios.
122-102-0001 Drill Template 1
2.3 Equipment installation procedures
1.Using the template, drill six holes in the instrument
panel in a location convenient to the pilot position
(s).
To connect intercom into the aircraft audio system,
parallel the appropriate set of cables from the intercom
to the Auxiliary Aircraft Radio Headset Jacks. Finally,
install new headset jacks into the aircraft and connect
them directly to the appropriate pins of the PM1000II.
See the wiring diagram for all details of the wire harness interconnects.
2.Insert the PM1000II from behind the instrument
panel, aligning the holes for the knobs, LED, and
switch.
Revision 5, Feb. 2012 Page 3 200-123-0003
2.4.1 Electrical Noise Issues
WARNING: You must use separate shielded cables
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