COBHAM PIA01-001 Installation And Operation Manual
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COBHAM PIA01-001 Installation And Operation Manual

Passenger intercom amplifier
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Installation and Operation Manual
Passenger Intercom Amplifier
Chelton Avionics, Inc. doing business as Cobham Aerospace
Communications is responsible for full distribution and
revisions of ICA's (Instructions for Continued Airworthiness).
For inquires regarding the content and currency of this
manual contact Chelton Avionics, Inc., 6400 Wilkinson Drive,
Prescott, Arizona, 86301. Telephone (928) 756-1615 or refer
to the following website:
information.
PIA01-001
SM78
ISSUE 1.11
IMPORTANT NOTICE
www.wulfsberg.com
Issued on the authority of Cobham
Copyright 2012
 
Published on
25 September 2014
These commodities, technology 
or software are Controlled in 
accordance with the United 
States Export Administration 
Regulations.  When exported 
from the United States, 
diversion contrary to U.S. Law is 
prohibited. 
for more
 

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Summary of Contents for COBHAM PIA01-001

  • Page 1 ISSUE 1.11 IMPORTANT NOTICE Chelton Avionics, Inc. doing business as Cobham Aerospace Communications is responsible for full distribution and revisions of ICA's (Instructions for Continued Airworthiness). For inquires regarding the content and currency of this manual contact Chelton Avionics, Inc., 6400 Wilkinson Drive, Prescott, Arizona, 86301.
  • Page 2 PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 Prepared By: Ken Marshall Checked By: Bill DeHaven Approved By: Robert Davis The status of this installation and operation manual is controlled by issue shown on the title page and header.

  • Page 3: Table Of Contents

    PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 Table of Contents Section Title Page Description Introduction Product Description Design Features Specifications 1.4.1 Electrical Specifications 1.4.2 Physical Specifications 1.4.3 Environmental Specifications 1.4.4 Product Approval Installation Introduction Unpacking and Inspection 2.2.1...

  • Page 4: Description

    Introduction Information in this section consists of product description, design features and specifications for the PIA01-001 Passenger Intercom Amplifier (PIA01). All derivative product information shall be contained in the applicable manual supplement, which may be obtained from Cobham as required.

  • Page 5: Specifications

    PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 Specifications 1.4.1 Electrical Specifications Input Signals Input Power Normal Operating Conditions: Nominal: +28.0 Vdc Maximum: +30.3 Vdc Minimum: +22.0 Vdc Emergency: +18.0 Vdc Abnormal Operating Conditions: Maximum: +32.2 Vdc Minimum: +20.5 Vdc...
  • Page 6 PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 Circuitry Type: differential ICS Keylines (PAX1 ICS KEY through PAX6 ICS KEY) Quantity: Logic: active LO, no external pull up required ≤+3 Vdc Input Active: ≤10 mA Maximum Current:...
  • Page 7 PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 Input Protection: diode protected to +45 Vdc maximum Music Level Discrete Input (MUSIC LEVEL) Quantity: Lo level: Logic: active LO, no external pull up required ≤+3 Vdc Input Active: ≤10 mA...

  • Page 8: Physical Specifications

    230 mVrms nominal, (2 loads) 136 mVrms nominal, (4 loads) Circuitry Type: balanced 1.4.1.1 Audio Performance The PIA01-001 meets the requirements of FAA TSO-C139 and RTCA/DO-214 Class Ib. Audio Frequency Response: <3dB from 300 - 6000Hz Volume Controls: 40dB of adjustment (intercom audio) Crosstalk: >55dB attenuation from rated output power for input to output...

  • Page 9: Environmental Specifications

    Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 1.4.3 Environmental Specifications The PIA01-001 has been tested to the environmental conditions listed below. Environmental categories for which TSO compliance has been demonstrated are listed on the Environmental Qualification Form in Section 2 of this manual.

  • Page 10: Installation

    Cobham or its designated warranty repair center, or any labour to remove or re-install the defective unit in the aircraft. Contact Cobham for any questions regarding this warranty, its applicability to your units and/or for return authorization.

  • Page 11: Warnings

    PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 2.4.1 Warnings WARNING: High volume settings can cause hearing damage. Set the headset volume control to the minimum setting prior to conducting tests, and slowly increase the volume to a comfortable listening level.

  • Page 12: Mounting

    PIA01. This can either overload and damage the PIA01 headphone amplifier or at the very least be unpleasant to the headset wearer. See PIA01-001 Installation note 12 on drawing No. PIA01-001-403-0. 3. Software Approval A deviation to TSO-C139 has been granted by the FAA to allow the software to be developed to RTCA/DO178B Level D in lieu of Level C.
  • Page 13 PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 MIL-W-22759 as specified in AC43.13-1B Change 1, Paragraphs 11-85, 11-86, and listed in Table 11-11. For shielded wire applications, use Tefzel MIL-C-27500 shielded wire with solder sleeves (for shield terminations) to make the most compact and easily terminated interconnect.
  • Page 14 PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 This input is only active when the PIA01 is operating in analog mode. In digital mode the PIA01 Headphone Impedance setting is controlled by data on the Digital ICS Tieline.
  • Page 15 PIA01-001 Passenger Intercom Amplifier Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 2.4.5.1.5 ICS Tieline Load Input (NAT ICS LEVEL) The PIA01 has one ICS Tieline Load Input for selecting the number of ICS Tieline loads on the Analog ICS Tieline. Two settings are available, two loads and four loads.

  • Page 16: Post Installation Checks

    2.4.5.2.4.2 Analog ICS Tieline The Analog ICS Tieline can be configured to support standard Cobham analog audio products. Refer to the interconnect drawing in section 2.7 to ensure that the tieline loading is correct. The Analog ICS Tieline is disabled when the PIA01 is operating in digital mode.

  • Page 17: Adjustments And Connections

    Adjustments and Connections When installed in an audio communications system such as the Cobham DACS, all adjustments are made through the DACS Device Configuration Software (DevCS) application. Refer to the SM76 AMU50- 001 Audio Management Unit Installation and Operation Manual and the DevCS Installation and Operation manual for information on connection and operation of the DevCS.
  • Page 22 ENVIRONMENTAL QUALIFICATION FORM Description: Passenger Intercom Amplifier Document #: PIA01\001\521-0 NAT Part #: PIA01-001 TSO #: TSO-C139 Manufacturer’s Specification and/or Other Applicable Specification: RTCA/DO-160E, RTCA/DO-214 Manufacturer: Wulfsberg Electronics Division Address: 6400 Wilkinson Drive, Prescott, AZ USA 86301 Prepared By: Checked By:...
  • Page 23 PIA01-001 Environmental Qualification Form Conditions Section Description of Conducted Tests Explosive Atmosphere Category X, no test performed. Waterproofness 10.0 Category X, no test performed. Fluids Susceptibility 11.0 Category X, no test performed. Sand and Dust 12.0 Category X, no test performed.
  • Page 24 REMARKS DO-160E, Sections 4 to 8, and 15 to 17 tests were conducted at Northern Airborne Technology Ltd. (NAT) in Kelowna, BC on PIA01-001. DO-160E, Sections 18 to 22 tests were conducted at CKC Laboratories in Bothell, WA on PIA01-001.

  • Page 26: Operation

    Installation and Operation Manual SM78-PIA01-804-0 Rev. 1.11 Section 3 Operation Introduction Information in this section consists of the functional and operational procedures for the PIA01-001 Passenger Intercom Amplifier (PIA01). General Information The PIA01 is a remote mounted Passenger Intercom Amplifier that supports up to twelve passengers together on one intercom system (six headset connections on the PIA01, each supporting two headsets in parallel, if desired).

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