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 Colour Function
A Black Power Ground
B Red Power Supply
C Orange 1PPS
D Blue GPIO1
E Brown GPIO2
F    
G Violet RS422-TX(+)/RS232-TX PRI
H Yellow RS422-RX(+)/RS232-RX PRI
J White Serial Ground 1
K Light Blue RS422-TX(+)/RS232-TX AUX
L Light Green RS422-RX(+)/RS232-RX AUX
M White/Red Stripe Serial Ground 3
N Light Brown/Black Stripe CAN H
P    
R    
S Pink Alert H
T Pink/Black Stripe Alert L
U    
V Grey GPIO Ground 1
W Grey/Black Stripe GPIO Ground 2
X Grey/Red Stripe GPIO Ground 3
Y Violet/Black Stripe RS422-TX(-) PRI
Z Yellow/Black Stripe RS422-RX(-) PRI
a Light Blue/Black Stripe RS422-TX(-) AUX
b Light Green/Black Stripe RS422-RX(-) AUX
c Light Brown CAN L
d    
e    
f Brown/White Stripe NA
g Blue/White Stripe NA
h White/Black Stripe Serial Ground 2
j Orange/Black Stripe NA

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:

  • Primary RS232/RS422

  • GPIO Connector

  • Auxiliary RS232/RS422

  • 1PPS Connector

  • CAN Connector

  • Alert Connector

Given below are details of the IO breakout cable connections.

Pin Function Primary Auxiliary CAN GPIO 1PPS Alert Power
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
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

Cable Side IO Connector