IO Connection
The IO connection is used to provide the power supply and access to a range of interface connections. It can be achieved with an IO Unterminated Cable, an IO Breakout Cable or by building your own cable (see Custom IO Termination). Connection is made through MIL-DTL-38999 Series III connectors, which provide reliable and rugged connection under demanding conditions and are rated to IP67 in the mated position (see MIL-DTL-38999 Series III Connector Mating).
IO Unterminated Cable
An optional 5 m unterminated cable is available for custom connections. Each individual wire in the unterminated cable is a colour-coded FEP coated wire. See Pin for details on pin out functions. Custom cable lengths for unterminated types are available subject to minimum order quantities and lead times; contact the Sales team for more information
IO Unterminated Cable
Pin Allocation Table
IO Breakout Cable
Advanced Navigation offers a 2 metre long pre-terminated IO cable that is supplied as part of the BoreasEvaluation Kit. Custom cable lengths are not available for pre-terminated cables.
IO Breakout Cable
The IO breakout cable comprises one DC barrel plug for power, and six DB9 connectors that allow connecting to:
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Given below are details of the IO breakout cable connections.
Pin | Function | Primary | Auxiliary | CAN | GPIO | 1PPS | Alert | Power |
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A | Power Ground | Ring | ||||||
B | Power Supply | Tip | ||||||
C | 1PPS | 2 | ||||||
D | GPIO1 | 2 | ||||||
E | GPIO2 | 3 | ||||||
F | ||||||||
G | RS422-TX(+)/RS232-TX PRI | 2 | ||||||
H | RS422-RX(+)/RS232-RX PRI | 3 | ||||||
J | Serial Ground 1 | 5 | ||||||
K | RS422-TX(+)/RS232-TX AUX | 2 | ||||||
L | RS422-RX(+)/RS232-RX AUX | 3 | ||||||
M | Serial Ground 3 | 6 | ||||||
N | CAN H | 7 | ||||||
P | ||||||||
R | ||||||||
S | Alert H | 2 | ||||||
T | Alert L | 3 | ||||||
U | ||||||||
V | GPIO Ground 1 | 5 | ||||||
W | GPIO Ground 2 | 5 | ||||||
X | GPIO Ground 3 | |||||||
Y | RS422-TX(-) PRI | 8 | ||||||
Z | RS422-RX(-) PRI | 7 | ||||||
a | RS422-TX(-) AUX | 8 | ||||||
b | RS422-RX(-) AUX | 7 | ||||||
c | CAN L | 2 | ||||||
d | ||||||||
e | ||||||||
f | NA | |||||||
g | NA | |||||||
h | Serial Ground 2 | 5 | ||||||
j | NA |
IO Breakout Cable Connector Pin-out
Custom IO Termination
Whilst it is recommended to use either a breakout cable or an unterminated cable from Advanced Navigation, you can also source and build your own custom IO cable.
A suitable IO MIL-DTL-38999 Series III connector is available from several manufacturers with a variety of different cable boot and strain relief options. The table below specifies suitable example connectors.
Connector | Manufacturer and Series | Part Number | Notes | Finish |
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TV-CTV MIL-DTL-38999 Series III, Size 19 connector with 32 size 20 contacts | Amphenol | TV O6 ZNCI 19-32 S A F472 | Aluminium, Plug with integrated Backshell, Size 19-32 (32 x 20 gauge contacts), Socket contact, A orientation key | Black Zinc Nickel |
Souriau | 8DA519Z32SA | Aluminium, Plug with integrated Backshell, Size 19-32 (32 x 20 gauge contacts), Socket contact, A orientation key |