C
HAPTER
2: H
ANDLING
GUIDELINES
FOR
AXN M
ODULES
9
3.
Keep the alignment dots aligned and disconnect the cable connector.
Grounding the AXN chassis
Star point
The star point is a common point for all grounds on the aircraft or vehicle. It is the designated reference point for all
voltages and signals.
N
OTE
:
Due to the low impedance of most aircraft structures, the star point can be the whole airframe.
AXN
isolated grounds
The AXN has the following three grounds:
• GND: AXN internal electrical ground
• CHASSIS: AXN mechanical ground
• POWER(-): 28V return
N
OTE
:
All three grounds are isolated from one another inside the AXN. CHASSIS is the signal name to differenti
-
ate it from the physical AXN chassis (metal work).
GND
GND is the zero volt line that all AXN internal signal conditioning modules use. All input and output signals on AXN
modules are referenced to this potential. This signal point is normally taken out to the connector on the top of each
AXN module (if available) and is usually pin 51. The GND point is also available on the AXN Power Supply Unit
(PSU) connectors.
CHASSIS
Each AXN module also has a CHASSIS pin available; this pin is connected to the AXN chassis. The signal is taken
out to the connector on the top of each AXN module (if relevant). The ground mounting bolt on the top of the PSU
is also connected to this signal point and to the chassis.
POWER(-)
POWER(-) is the return line for the AXN power supply.
N
OTE
:
The POWER(-) pin is not connected to the CHASSIS line or GND line within the AXN.
Summary of Contents for AXN
Page 1: ...AXN Quick Start Kit User Guide ...
Page 2: ......
Page 18: ...This page is intentionally blank ...