Air Comm Systems ACS PA100 F User manual

PA/Siren System Control Unit
Installation and Operations Manual
ACS PA100(F/D) Control Unit
Air Comm Systems, Inc
37610 Sky Canyon Dr., Hangar 51
Murrieta, CA 92563
Ph: 951-677-0101 ~ Fx: 951-677-0701
[email protected] ~ www.AirCommSystems.com

Air Comm Systems, Inc. Page 2
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Installation
Physical Dimensions Page 3
Physical Installation Page 3
Connector Schematic Page 4
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Operation
Method of Operation Page 5
Controls Page 6
Controls (Selector Switch) Page 7
n Instruction for Continued Airworthiness
Instruction for Continued Airworthiness Page 8
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Warranty Information
Air Comm Systems Warranty Page 9
ACS PA100(F/D) Control Unit Installation and Operations Manual
Table of Contents

Air Comm Systems, Inc. Page 3
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Physical Installation
The ACS PA100(F/D) Control Unit is designed to be Dzus mounted and should be installed
in the aircraft using the DC25SL-F Installation kit that was included with the unit. The above
outline drawing of the unit with dimensions will facilitate the installation. The DC25SL-F
Installation Kit consists of the following:
One (1) 25 pin AMP D-Sub miniature female mating connector complete with crimp pins,
hood, and slide lock.
The connector pin configuration of the ACS PA100(F/D)F Control Unit rear connector and the
recommended wire size for the aircraft cable harness is shown on the following page.
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Physical Dimension Outline
ACS PA100(F/D) Control Unit Installation and Operations Manual
Physical Dimensions
Figure 1  Control Unit Physical Dimensions

Air Comm Systems, Inc. Page 4
The ACS PA100(F/D) wiring harness should be constructed of Tefzel aircraft wire (M22759/16 grade).
All wires to be the wire gauge as noted in the above connector schematic. Adequate protection against
wear and chafing should be taken by using a braided cable sleeving or jacket. Before completing
installation, verify that all cable connector pins are seated properly and that the connector is securely
mounted to the unit mating connector. Important  please note the power of the unit before
installing; it will be either 14VDC or 28VDC and clearly marked as such on the units data tag.
Pre-fabricated cable harnesses are available from Air Comm to expedite installation  consult our
sales department for details.
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Connector Schematic
ACS PA100(F/D) Control Unit Installation and Operations Manual
Interface Schematic
Figure 2  Control Unit and Amplifier Connector Schematic

Air Comm Systems, Inc. Page 5
ACS PA100(F/D) Control Unit Installation and Operations Manual
Operations of the ACS PA100(F/D)
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Description
The ACS PA100(F/D) Control Unit is a compact, lightweight, panel mounted unit for use with
the ACS PA100F or ACS PA100D remote mounted Amplifier. It is built to withstand
demanding helicopter applications and is a proven performer in Law Enforcement, EMS,
Forestry and Utility applications, and is approved for use on USFS contracts.
n Method of Operation
1  Turning the Unit ON or OFF
To turn the unit on, rotate the SELECTOR switch (S2) clockwise to PA position. To turn the
unit off, rotate SELECTOR switch (S2) fully counter-clockwise.
2  PA Operation
Set the SELECTOR switch to PA. Adjust the VOLUME control (R32) to a position just below
the point at which feedback occurs. When maximum volume in the PA position is required,
hold the microphone close to your lips and speak in a loud voice.
3  Broadcasting Radio Messages over the Loud Speaker
Set the SELECTOR switch to the PA or MANUAL position. Set the VOLUME control (R32) to
desired level.
4  Wail or Yelp
Set the SELECTOR switch to the desired position.
5  Manual Siren Operation
Set the SELECTOR switch to the MANUAL position. Depress the SIREN button or, if
connected, activate the auxiliary switch. The toggle switch (S5) must be in the RADIO OFF
position.
Figure 3  Control Unit Front Panel

Air Comm Systems, Inc. Page 6
ACS PA100(F/D) Control Unit Installation and Operations Manual
Operations of the ACS PA100(F/D)
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Controls
All controls utilized during normal operation of the electronic siren are located on the
front panel of the Control Unit (see Figure 3).
1  VOLUME Control
The VOLUME control (R32) is used to control the volume when the electronic siren is
used for public address or radio amplification. Clockwise rotation of this knob increases
voice volume in the public address or radio amplification mode. The VOLUME control
does not control the volume of the siren.
The maximum clockwise setting of the control will be determined, in most cases, by the
point at which feedback or squeal occurs. This will depend upon the microphone gain,
open windows, speaker placement or proximity of reflecting surfaces. Adjust VOLUME
control to a position just below the point at which feedback occurs.
2  SIREN Button
The SIREN button, located in the middle of the front panel, is used to activate the siren
when the SELECTOR switch is in the MANUAL position. The RADIO switch can be in
either the ON or OFF position when operating the siren manually.
3  RADIO Switch
With the RADIO switch in the ON position, and the SELECTOR switch in either
MANUAL or PA, incoming radio messages will be amplified by the electronic siren.
When using the PA or siren functions, the switch should be in the OFF position. Volume
can be controlled by the VOLUME control.

Air Comm Systems, Inc. Page 7
ACS PA100(F/D) Control Unit Installation and Operations Manual
Operations of the ACS PA100(F/D)
4  SELECTOR Switch
The SELECTOR switch (Figure 4) is a five position rotary switch used to select the mode of
operation. The following are positions on the SELECTOR switch.
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A  OFF
In this position there is no power to the amplifier or circuitry in the control unit.
n B  PA
In this position the electronic siren may be used as a public address system. Volume is
controlled by the VOLUME control. Also, the SELECTOR switch must be set to this position
or the MANUAL position when the sirens radio broadcast function is to be used.
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C  MANUAL
In this position it is possible to operate the siren by depressing the front panel SIREN button.
The siren can also be activated by means of an auxiliary switch such as a foot switch or a
remote cyclic/collective switch. Also, the SELECTOR switch must be set to this position or
the PA position when the sirens radio broadcast function is to be used.
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D  WAIL
In this position the siren will produce a continuous wailing sound, up or down in frequency.
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E  YELP
In this position a continuous rapid warbled tone is generated.
Figure 4  Selector Switch

Air Comm Systems, Inc. Page 8
ACS PA100(F/D) Control Unit Installation and Operations Manual
Instruction for Continued Airworthiness
Instruction for continued airworthiness for PA/Siren System Model ACS-PA100F Drawing
Number 4000-000 PMA Approval Number PQ2074NM.
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GENERAL DESCRIPTION:
The PA/Siren System consists of a Dzus mounted control unit which controls the functions
of the PA/Siren output.
The remote amplifier is remote mounted in a quick release tray.
The speaker (s) is either flush mounted to the aircraft airframe or externally attached to a
hard point on the airframe.
Cables with quick release connectors interconnect control, amplified apeakers, circuit
breaker and audio/mixer.
n PURPOSE:
To provide instructions for the maintenance and inspection of the Air Comm Systems, Inc.
Model ACS-PA100F PA/Siren System.
This manual provides instructions supplementing the aircraft maintenance manual. These
instructions only supercede the aircraft manual in the indicated areas.
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OPERATIONAL CHECK:
The PA/Siren System should be checked prior to first flight each day per current operations manual.
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MAINTENANCE:
Check security and condition of Dzus mounted control unit, rack mounted remote amplifier
speaker (s) with projectors and cones and associated wiring hareness at periodic
inspections such as annual/100 hour IAW FAR43 Appendix D(i).
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On Condition.
Send control and amplifier to qualified repair facility for any repairs. Contact Air Comm
Systems, Inc. Phone [phone] or FAX [phone] for nearest factory authorized
repair facility.

Air Comm Systems, Inc. Page 9
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Warranty Information
ACS PA100(F/D) Control Unit Installation and Operations Manual
Warranty Information
Air Comm Systems, Inc. warrants each new product to be free from defective material and
workmanship and agrees to remedy any defect or to furnish a new part in exchange for any defective
unit provided an examination discloses such defect occurred under normal use and service, and
provided the defective unit is delivered to us, with transportation charges prepaid, within 1 year from the
date of acceptance of equipment by the owner. Each unit required and claimed defective must be
returned to:
This warranty does not extend to any products which have been subjected to misuse, neglect, accident,
or in violation of instructions furnished, nor does it extend to units which have been repaired or altered
outside of our factory except where such repairs are specifically authorized in writing by us. This
warranty is in lieu of all other warranties expressed or implied, and no representative or person is
authorized to assume for us any other liability in connection with the sale of our products.
Air Comm Systems, Inc.
37610 Sky Canyon Dr., Hangar 51
Murrieta, CA 92563
Ph: 951-677-0101
Fx: 951-677-0701
[email protected]