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Installation and Operation Manual
Emergency Relay Unit
Chelton Avionics Inc. doing business as Wulfsberg Electronics
Division is responsible for full distribution and revisions of
ICA's (Instructions for Continued Airworthiness).
For inquiries regarding the content and currency of this
manual contact Wulfsberg Electronics Division, 6400
Wilkinson Drive, Prescott, Arizona, 86301. Telephone (928)
756-1615 or refer to the following website:
www.wulfsberg.com
ERU50-001
SM83-ERU50-804-0
ISSUE 1.01
IMPORTANT NOTICE
for more information.
Copyright 2009
2012.11
SEALED
.19
17:46:3
2 -08'00'
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Table of Contents
Summary of Contents for COBHAM ERU50-001
- Page 1 Installation and Operation Manual ERU50-001 Emergency Relay Unit SM83-ERU50-804-0 2012.11 SEALED ISSUE 1.01 17:46:3 2 -08'00' IMPORTANT NOTICE Chelton Avionics Inc. doing business as Wulfsberg Electronics Division is responsible for full distribution and revisions of ICA's (Instructions for Continued Airworthiness).
- Page 2 ERU50-001 Emergency Relay Unit SM83 Installation and Operation Manual Prepared By: Checked By: Approved By: Zack Pahlman Barb Page 2012.11. 2012.11.1 Geoff Melton 2012.11.14 09:25:46 15:12:12 18:30:02 -08'00' -08'00' -08'00' The status of this installation and operation manual is controlled by issue shown on the title page. The status of each section is controlled by revision shown in the footer of each page.
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Page 3: Table Of Contents
ERU50-001 Emergency Relay Unit SM83 Installation and Operation Manual 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 Installation Introduction Unpacking and Inspection 2.2.1 Warranty Airworthiness Limitations Installation Procedures 2.4.1... -
Page 4: Description
Cobham as required. Review all notes, warnings and cautions. Product Description The ERU50 is an Emergency Relay Unit for use with the Cobham Digital Audio Communication System (DACS). Design Features The DACS is a management system that distributes and controls all of the transceiver, receiver and warning source audio in an aircraft. - Page 5 ERU50-001 Emergency Relay Unit SM83 Installation and Operation Manual Input Signals Microphone Inputs Quantity: Circuit Type: Differential, passive feed through Rated Level: 30 Vrms maximum Maximum Current: 1A maximum Headphones Inputs Quantity: Circuit Type: Differential, passive feed through Rated Level:...
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Page 6: Physical Specifications
ERU50-001 Emergency Relay Unit SM83 Installation and Operation Manual Intercommunication System Key Outputs Quantity: Maximum Current: 1A maximum ACP Power Output Quantity: Rated Level: 30 Vdc maximum Maximum Current: 1A maximum ERU Status Quantity: Maximum Current: 1A maximum 1.4.2 Physical Specifications Height 1.30 in (33.0 mm) maximum... -
Page 7: 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 8: Warnings
Check P1001, pins <20> <21> and <34> for continuity to ground (less than 0.5Ω). 2.4.4.2 Power On Checks Power up the aircraft’s systems and confirm normal operation of all functions with the ERU50-001 Emergency Relay Unit connected. Upon satisfactory completion of all performance checks, make all required log book entries, electrical load, weight and balance amendments and other documentation as required by your local regulatory agency before releasing the aircraft for service. -
Page 9: Functional Requirements
ERU50-001 Emergency Relay Unit SM83 Installation and Operation Manual 2.4.5 Functional Requirements The functionality of the ERU50-001 is described in Table 1 below: ACP1 ACP2 ACP3 ACP4 Functionality: USER 1 through USER 4 connected to their associated port on the... -
Page 10: Minimum Performance Requirements
ERU50-001 Emergency Relay Unit SM83 Installation and Operation Manual 2.4.6 Minimum Performance Requirements Refer to Section 2.4.5 Functional Requirements. Electrical continuity in both default and switched modes is shown in the tables below: AMU50 Connections H/S1 MIC H/S1 PHN ACP1 ICS... -
Page 11: Alert Configuration
SM83 Installation and Operation Manual 2.4.7 Alert Configuration When used as part of a Cobham Digital Audio Communications System (DACS), the ERU50 J1001 pin 25 (ERU STATUS OUT) is connected to AMU50 J103 pin 47 (ALERT 1). See Interconnect ERU50\001\403-0 Note 6. -
Page 16: Operation
Emergency Relay Unit. General Information The ERU50 is an Emergency Relay Unit for use with the Cobham Digital Audio Communication System (DACS). The ERU50-001 Emergency Relay Unit has no operator accessible controls. During installation, it may be determined that internal level adjustments are required. Qualified personnel only shall complete internal level adjustments.
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