SkyTrac Systems Ltd.
Document Rev. 01.020
DOC0334
Page 27 of 49
Restricted Proprietary and Confidential Information
Table 16
— ARINC 404 Bay A: pin descriptions
ARINC Pin # Pin Names
Description
1
SPI MISO
Reserved for CM*, do not connect
2
GND
Reserved for CM*, do not connect
3
+3V3SW
Reserved for CM*, do not connect
4
DI4
Digital Input 4
5
DI2
Digital Input 2
6
DI1
Digital Input 1
7
TRAY_MOSI
Reserved for CM*, do not connect
8
TRAY_SCLK
Reserved for CM*, do not connect
9
SPI_TRAY_CS
Reserved for CM*, do not connect
10
DIO_GND**
Digital I/O Ground
11
DI6
Digital Input
12
DO1
Digital Output 1
13
AUX_PWR
Auxiliary Power Output
14
AUX_GND
Auxiliary GND
15
PWR
External Power Input (28V)
16
GND
28V return ground
17
CH_GND
Chassis Ground
18
CH_GND
Chassis Ground
19
CH_GND
Chassis Ground
20
CH_GND
Chassis Ground
21
S1_GND
Serial 1 Ground
22
S2_GND
Serial 2 Ground
23
RS485_A1
RS485 port 1 non-inverted line
24
RS485_B1
RS485 port 1 inverted line
25
RS232_RX1
Serial 1 receiver
26
RS232_TX1
Serial 1 transmitter
27
RS232_RX2
Serial 2 receiver
28
RS232_TX2
Serial 2 transmitter
29
RS485_GND1*** RS485 port 1 ground reference
30
ADC1
Analogue input 1
A1
IRIDIUM ANT
Iridium antenna cable
A2
GPS ANT
GPS antenna cable
* CM = Configuration Module - The configuration module comes pre-wired.
** DIO_GND must be connected to aircraft ground for the digital inputs to function correctly.
*** RS-485_GND1 is isolated within the ISAT-200 system. RS-485_GND1 needs to be connected to
aircraft ground for reliable operation of the RS-485 databus.
The document reference is online, please check the correspondence between the online documentation and the printed version.
