Northern Airborne Technology RS16 - Manual (Page 29)

SM15 Rev. 4.00 RS16 Remote Switch Manual
Nov 24, 2003 Page 3-1
ENG-FORM: 806-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 3.0 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the
RS16 Remote Switch.
3.2 General
This section only describes the basic operation of the RS16 series of remote switches
because the product is user definable in its applications. This section will describe the
two available keying methods. Please note that only one keying method can be used
on each RS16 board; however if the unit is a RS128 or a RS192 each of the individual
RS16 boards within can use a different keying method.
The RS16 has a total of five relays; one ILS reversion relay, and four user relays. The
four user relays will be referred to as the GROUP relays in the following descriptions.
If used for GPS/LORAN/VLF switching, the unit may have to be wired to return to the
VOR/ILS mode when the navigation receiver is channeled to an ILS frequency. Check
local aviation regulations regarding this requirement.
NOTE: ILS reversion mode is not applicable in Canada for NAV/GPS installations.
3.2.1 Active Voltage Keying
Refer to installation drawing number RS16001\403-2. In the active voltage keying mode
the coils of the GROUP relays are all grounded together by grounding pin 43. To key all
four relays at once apply 28 VDC to pin 21. To individually key each relay apply 28VDC
to pin 17, pin 18, pin 19, and/or pin 20 as required.
3.2.2 Active Ground Keying
Refer to installation drawing numbers RS16001\403-3 and RS16001\403-4. The
GROUP of relays is powered by providing 28 Vdc to pin 21. To key all four relays at
once ground pin 43. To individually key each relay ground pin 39, pin 40, pin 41, and/or
pin 42 as required. Drawing number RS16001\403-3 shows the ILS reversion function;
If pin 60 is grounded in an ILS reversion action the GROUP of relays become de-
energized. This returns all the wipers to the N.C. (normally closed) contacts.
3.3 Limitations
The RS16 series remote switch imposes no limitations on the original airframe.