Jupiter Avionics JA31-N01 User manual

Rev B Page i
JA31-N01
Intercom Bus Selector - NVG
Installation and Operating Manual
Rev. A
Jupiter Avionics Corporation
1959 Kirschner Road
Kelowna BC
Canada V1Y 4N7
Tel: [phone]
Toll-Free: 1 855 478 2232
www.jupiteravionics.com

JA31-N01 Intercom Bus Selector - NVG
Installation and Operating Manual
Rev A Page ii
Copyright 2018Jupiter Avionics Corp.
All rights reserved
Jupiter Avionics Corporation (JAC) permits a single copy of this manual to be printed or downloaded for the express use
of an installing agency. Any such electronic or printed copy of this manual must contain the complete text of this copyright
notice. Any unauthorized commercial distribution of this manual is strictly prohibited. Except as described above, no part
of this manual may be reproduced, copied, transmitted, disseminated, downloaded, or stored in any storage medium for
any purpose without the express prior written consent of JAC.
RECORD OF REVISIONS
Revision
Rev Date
Description
ECR
A
May 2018
Initial release, Serial number 1001 and higher.
3446
Prepared:
MPB
Checked:
Approved:
IMPORTANT:
Information in this document is subject to change without notice.
To confirm the current revision status of this manual, visit the JAC website:
www.jupiteravionics.com
JAC
SRM
05-09-18 JAC
KDV
05-10-18

JA31-N01 Intercom Bus Selector
Installation and Operating Manual
Rev A Page iii
Table of Contents
SECTION 1 - DESCRIPTION .................................................................................................................................................1
1.1 Overview .................................................................................................................................................................1
1.2 Features ..................................................................................................................................................................1
1.3 Inputs and Outputs..................................................................................................................................................1
1.3.1 Inputs...............................................................................................................................................................1
1.3.2 Outputs............................................................................................................................................................1
1.3.3 Bi-directional Signals.......................................................................................................................................1
1.4 Specifications..........................................................................................................................................................2
1.4.1 Electrical Specifications...................................................................................................................................2
1.4.2 Mechanical Specifications...............................................................................................................................2
1.4.3 Environmental Specifications..........................................................................................................................3
1.4.4 Flammability of Materials ................................................................................................................................3
SECTION 2 –INSTALLATION............................................................................................................................................... 4
2.1 Introduction..............................................................................................................................................................4
2.2 Continued Airworthiness .........................................................................................................................................4
2.3 Unpacking and Inspecting Equipment.....................................................................................................................4
2.3.1 Warranty..............................................................................................................................................................4
2.4 Installation Procedures............................................................................................................................................4
2.4.1 Installation Limitations.........................................................................................................................................4
2.4.2 Cabling and Wiring..............................................................................................................................................4
2.4.3 Mechanical Installation........................................................................................................................................5
2.4.4 Legend Replacement..........................................................................................................................................5
2.4.5 Post Installation Checks......................................................................................................................................5
2.5 Legend Text Selection using ProCS™....................................................................................................................6
2.5.1 Front Panel Switches ......................................................................................................................................6
2.5.2 Connector Maps..............................................................................................................................................6
2.6 Installation Kit..........................................................................................................................................................7
2.6.1 Recommended Crimp tools.............................................................................................................................7
2.7 Installation Drawings...............................................................................................................................................7
2.7.1 Generation of Custom Drawings.....................................................................................................................7
SECTION 3 –OPERATION....................................................................................................................................................8
3.1 Introduction..............................................................................................................................................................8
3.2 Front Panel Controls ...............................................................................................................................................8
(1) User/Crew Member Designation.........................................................................................................................8
(2) Intercom Bus Selector Legends..............................................................................................................................8
(3) Intercom Bus Selector Switches .........................................................................................................................8
3.3 Operation.................................................................................................................................................................9
3.3.1 Panel Lighting..................................................................................................................................................9
3.3.2 BUS Selection.................................................................................................................................................9
Appendix A - Installation Drawings...................................................................................................................................A1
A1 Introduction............................................................................................................................................................A1
A2 Installation Drawings.............................................................................................................................................A1
Appendix B - Installation Documents ...............................................................................................................................B1
B1 Airworthiness.........................................................................................................................................................B2
B2 Instructions for Continued Airworthiness ..............................................................................................................B2
1.3.4Terminations.....................................................................................................................................................1

Rev A Page 1
JA31-N01 Intercom Bus Selector - NVG
SECTION 1 - DESCRIPTION
1.1 Overview
The JA31-N01 Intercom Bus Selector - NVG provides the crew with the ability to manage the intercom amongst up to
six audio controllers in the aircraft. The ICS TIE lines from three or four groups are connected to one of two intercom
buses. Groups three and four can support up to two audio controllers each.
1.2 Features
The JA31-N01 consists of two subassemblies. The main subassembly features a 25 pin D-Min connector, with
backward compatibility to legacy systems. The faceplate subassembly contains the removable legends.
The JA31-N01 is NVIS Type I Class B compliant.
The JA31-N01 legends are directly dimmable from the aircraft lighting bus and may be replaced with legends having
custom markings.
The JA31-N01 features four intercom tie line switches to individually connect each audio controller group to one of two
intercom buses.
The JA31-N01 provides load matching to maintain ICS TIE line audio levels.
The JA31-N01 switching functions are passive and do not require power from the aircraft.
1.3 Inputs and Outputs
Refer to the JA31-N01 connector map for the mating connector designators and pin assignments for the
input and output signals.
1.3.1 Inputs
Name
Qty
Type
+28VDC LIGHTS INPUT
1
Analog control signal
1.3.2 Outputs
Name
Qty
Type
None
0
N/A
1.3.3 Bi-directional Signals
Name
Qty
Type
USER # ICS TIE HI/LO
4
Audio signal
1.3.4 Terminations
Name
Qty
Type
USER 4 ICS TIE LOAD HI/LO
1
USER 5 TERMINATION A/B
1
USER 6 TERMINATION A/B
1
2.00 kOhm Resistor
Jumper short configured
Jumper short configured

JA31-N01 Intercom Bus Selector
Installation and Operating Manual
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1.4 Specifications
1.4.1 Electrical Specifications
Power Input N/A
1.4.1.1 Audio Performance
Rated Input Level
ICS TIE rated input level 1.2 Vrms 10%
Rated Output Power
ICS TIE rated output level 1.2 Vrms 10%
Output Load User 1 ICS TIE load 1 load of 2000 10%
User 2 ICS TIE load 1 load of 2000 10%
User 3 ICS TIE load 1 or 2 parallel loads of 2000 10%
User 4 ICS TIE load 1 or 2 parallel loads of 2000 10%
Input to output Crosstalk and Bleed-through Level
Input to Output crosstalk ≤55 dB
Input to Input Crosstalk Level
Input to Input crosstalk ≤60 dB
System Input to Output Polarity Maintained
1.4.1.2 Audio Performance, Other
ICS TIE input to output circuitry type Balanced, Pass-through
1.4.1.3 Lights Input
+28VDC LIGHTS INPUT 32 Vdc max.
+28VDC LIGHTS INPUT, current 40 mA max.
1.4.2 Mechanical Specifications
Height 1.125 in [28.6 mm] max
Behind panel depth (excluding connectors) 1.71 in [43.4 mm] max
Dimensions in front of Dzus rail 0.92 in [23.4 mm] max
Faceplate width 5.75 in [146.1 mm] max
Behind panel width 4.92 in [125.0 mm] max
Weight 0.46 lb [0.21 kg] max
Connectors (2): J1 One 25-pin D-Sub male, V5 locking
J2 One Ground stud 4-40, 0.5 in. max
Mounting 2 Dzus fasteners
Bonding 2.5 m
Installation kit part number INST-JA31

JA31-N01 Intercom Bus Selector
Installation and Operating Manual
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1.4.3 Environmental Specifications
CONDITIONS
SECTION
DESCRIPTION OF TESTS CONDUCTED
Temperature
4.5
Equipment tested to Category C4
Ground Survival Low Temperature
4.5.1
Equipment tested to Category C4 (-55 °C)
Short-Time Operating Low
Temperature
4.5.1
Equipment tested to Category C4 (-45 °C)
Operating Low Temperature
4.5.2
Equipment tested to Category C4 (-45 °C)
Ground Survival High Temperature
4.5.3
Equipment tested to Category C4 (+85 °C)
Short-Time Operating High
Temperature
4.5.3
Equipment tested to Category C4 (+70 °C)
Operating High Temperature
4.5.4
Equipment tested to Category C4 (+70 °C)
In-Flight Loss of Cooling
4.5.5
Equipment identified as Category X, no test performed
Operational Shock and Crash Safety
Operational Shock
Crash Safety (impulse)
Crash Safety (sustained)
7.0
7.2.1
7.3.1
7.3.3
Equipment tested to Category B (6 g for 11 ms)
Equipment tested to Category B (20 g for 11 ms)
Equipment tested to Category B (20 g for 3 sec)
Vibration
Helicopter - Random, unknown
8.0
8.8.3
Equipment tested to Category U2FF1
1.4.4 Flammability of Materials
The JA31-N01 complies with the requirements of RTCA/DO-160G Sec 26.3.3 "Flammability", through equivalent
flammability testing of materials and the Small Parts Exemption.

Rev A Page 4
JA31-N01 Intercom Bus Selector - NVG
SECTION 2 –INSTALLATION
2.1 Introduction
This section contains unpacking and inspection procedures, installation information, and post-installation checks.
2.2 Continued Airworthiness
Maintenance of the JA31-N01 is on condition only. Scheduled inspection and/or periodic maintenance of this unit is
not required.
2.3 Unpacking and Inspecting Equipment
Unpack the equipment carefully. Check for shipping damage and report any problems to the relevant carrier. Confirm
that the Authorized Release Certificate or Certificate of Conformance is included. Complete the on-line warranty card
from the Jupiter Avionics Corporation (JAC) website –www.jupiteravionics.com/warranty
2.3.1 Warranty
This product manufactured by JAC is warranted to be free of defects in workmanship or performance for 2 years from
the date of installation by an approved JAC dealer or agency. This warranty covers the cost of all materials and labour
to repair or replace the unit, but does not include the cost of transporting the defective unit to and from JAC or its
designated warranty repair centre, or of removing and replacing the defective unit in the aircraft. This warranty does
not cover failures due to abuse, misuse, accident, or unauthorized alteration or repairs.
THIS WARRANTY IS VOID IF THE PRODUCT IS NOT INSTALLED BY AN AUTHORIZED JAC DEALER. If the on-
line warranty card is not completed, the product will be warranted from the date of manufacture.
Contact JAC for return authorization, and for any questions regarding this warranty and how it applies to your unit(s).
JAC is the final arbiter concerning warranty issues.
2.4 Installation Procedures
WARNING: Loud noise can cause hearing damage. Set the headset volume to minimum before
conducting any tests, and slowly increase the volume to a comfortable listening level.
2.4.1 Installation Limitations
The JA31-N01 may be installed only by following the applicable airworthiness requirements.
2.4.2 Cabling and Wiring
All wire shall be selected in accordance with the original aircraft manufacturer’s maintenance instructions, or AC43.13-
1B Change 1, Paragraphs 11-76 through 11-78. Unshielded wire types shall qualify to 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 tag ring or equivalent (for shield terminations) to make the most compact and easily
terminated interconnect. Follow the Connector Map in Appendix A of this manual.
Allow 3” from the end of the shielded wiring to the shield termination to allow the connector hood to be easily installed.
Refer to the Interconnect drawing in Appendix A of this manual for shield termination details. Note that this unit has a
‘clamshell’ hood that is installed after the wiring is complete.
Maintain wire segregation and route wiring in accordance with the original aircraft manufacturer’s maintenance
instructions.

JA31-N01 Intercom Bus Selector - NVG
Installation and Operating Manual
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Unless otherwise noted, all wiring shall be a minimum of 24 AWG, except ground lines, which shall be a minimum of
22 AWG. Refer to the Interconnect drawing for additional specifications. Check that the ground connection is clean
and well secured, and that it shares no path with any electrically noisy aircraft accessories such as blowers, turn-and-
bank instruments, or similar loads.
2.4.3 Mechanical Installation
The JA31-N01 can be mounted in any attitude and location with adequate space for the front panel and sufficient
clearance for the connector and wiring harness. It requires no direct cooling.
2.4.4 Legend Replacement
The JA31-N01 illuminated legends are field replaceable. For further information, refer to the ‘Legend Replacement’
document in Appendix A of this manual.
2.4.5 Post Installation Checks
2.4.5.1 Voltage/Resistance checks.
Do not attach this unit until the following conditions are met:
a) Check P1 pin 2for +28 Vdc lights bus voltage.
b) Check P2 pin 14 for continuity to ground (less than 0.5 Ω).
c) Check all pins for shorts to ground or adjacent pins.
2.4.5.3 Power on Checks.
Power up the aircraft’s systems and confirm normal operation of all functions of the JA31-N01. Refer to
Section 3 (Operation) for specific operational details.
a) With all switches in the BUS 1 position, confirm each USER can communicate to all other USERs on the
intercom tie lines.
b) With the USER 1 switch to BUS 2 and all other switches on BUS 1, confirm that USER 1 cannot hear the
other USERs. Confirm that the other USERs cannot hear USER 1. Repeat for each USER.
c) Adjust the lighting bus from minimum to maximum. Confirm that the JA31 legend illumination changes from
dim to bright.
When all performance checks are satisfied, complete the necessary regulatory documentation before releasing the
aircraft for service. Refer to Appendix B.

JA31-N01 Intercom Bus Selector - NVG
Installation and Operating Manual
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2.5 Legend Text Selection using ProCS™
The JA31-N01 has no required adjustments, but the configuration program ProCS™can be used to customize the
text for each legend either at the time of ordering the unit, or if text changes are required after installation. The JA31-
N01 need not be connected to a computer to select the legend text.
For information on ordering customized legends, refer to the ProCS™ Ordering Instructions on the JAC website.
2.5.1 Front Panel Switches
The Front Panel Switches window is used to specify the text for each legend.
Note: If the name of a front panel switch is changed using this software, the change will be incorporated in
the connector maps and interconnect, to give truly customized installation diagrams.
In the example shown here, the option ‘New…’ has been selected. A
pop-up ‘New Label’ window will appear, allowing the user to create a
customized legend –in this case, JAC. The new legend name will
now be shown in the appropriate position on the faceplate
representation in the software program, and will be used in the
connector maps and interconnect.
2.5.2 Connector Maps
This section contains connector maps and interconnects that are automatically generated to show changes to switch
labels that affect the installation of the JA31-N01.
Among the options is ‘- - - -‘ which signifies that
the legend will be left blank, and ‘New…’ which
allows the user to enter a completely new
legend of up to five characters. If a ‘new’
legend has been added, the option ‘Edit …’ is
added to the menu to enable changes to the
newly created label.
Clicking on a customizable legend will open a drop-
down menu listing the options for that label. The
currently selected option will be highlighted. To escape
from the menu, click on the desired option, or right-click
in the window. A 'Print…’ box will appear. Click outside
the box to escape, or select it to print the 'Front Panel
Switches’ window showing the current label selections.

JA31-N01 Intercom Bus Selector - NVG
Installation and Operating Manual
Rev A Page 7
2.6 Installation Kit
The kit required to install this unit is not included with the unit.
The installation kit (Part # INST-JA31) consists of the following:
Quantity Description JAC Part #
1 D-Sub 25-pin connector, hood and 25 crimp pins CON-3420-0025
1 TAG ring, 0.375" Inside Diameter CON-5500-0375
1 3/4" Inside Diameter- Black Heat Shrink Tube WIR-HTSK-0750
2.6.1 Recommended Crimp tools
Connector Type
Hand crimp tool
Positioner
Insertion/extraction tool
Positronic
9507
9502-3
M81969/1-04
Positronic
AFM8 (Daniels)
M22520/2.08 KB-1
2.7 Installation Drawings
The drawings and documents required for Installation can be found in Appendix A of this manual.
2.7.1 Generation of Custom Drawings
The interconnects and connector maps in Appendix A of this manual are generic drawings based on the standard
version of the JA31-N01. However, if JAC’s ProCS™ software has been used to change switch legends, the software
can be used to generate fully customized interconnects and connector maps for use by the installer.