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SPEEDBOX / ConnectorDetails

Connector details


Serial port 1

9 way D-type male connector

Serial connector pin out details
Pin Function
1* ADC 4
2 Receive
3 Transmit
4* ADC Ground
5 GND
6* ADC 2
7 Power in +12v supply
8* ADC 1
9* ADC 3

* note that ADC pins are only available on the DB9 for the SPEEDBOX MINI


Serial port 2

9 way D-type male connector

Serial 2 connector pinout details
Pin Function
1 NC
2 Receive
3 Transmit
4 Secondary Transmit*
5 GND
6 Secondary Receive
7 Power in +12V supply
8 NC
9 NC

*The secondary transmit and receive ports are not implemented presently, these pins should be left as NC.


Pulse output

BNC 50 ohm connector

Pulse output connector details
Centre Signal 0=0V

1=5V

max 5mA

Shield GND  


Trigger input

BNC 50 ohm connector

Trigger Input details
Centre Signal <O.5V = low.

high => 2.1V

Internal pullup to 2.5V

Shield GND  

NOTE: There is an internal debounce on the trigger input which means that only one edge will be detected during the debounce period (50ms). As such, when triggering on thin laser barrier strips or short button presses it is important to trigger on the first edge which will be seen, otherwise the trigger signal can be missed.


CAN port

9 way D-type male connector. If two CAN ports are present on the front of the unit then they are internally connected in parallel, this makes connecting termination much simpler.

CAN port connector pinout details
Pin Function
2 CAN L
6 GND
7 CAN H
9 12v
Termination None Fitted
Dominant bit >2.5V difference
Recessive bit <0.9V difference

NOTE: No internal CAN termination is fitted within the SPEEDBOX, It is essential that the user fits appropriate termination if required. In general, if the SPEEDBOX is at one end of a two node CAN network with a CAN logging device at the other end, then the SPEEDBOX will need to be fitted with a 120Ω resistor between CAN H and CAN L in the cabling used to attach it to the network


Analogue input

LEMO 4 pin connector part number FGG.0B.304.CLAD52Z

Analogue connectors pinout details
Pin Function Voltage range
1 Signal ground  
2 Input/Output -10 to + 10 output, 0-15V input
3 12v sensor supply  
4 Sensor supply GND  


Power connector

LEMO 2 pin connector part number FGG.0B.302.CLAD52Z

Power Connector pinout details
Pin Function
1 +ve
2 GND

9 - 15V for SPEEDBOXBOX MINI
9 - 30V for SPEEDBOXBOX


Antenna 1 and 2

SMA 3.3v feed to antennas. On the standard SPEEDBOX and the single antenna SPEEDBOX-INS only "RF 1" is connected. On the SPEEDBOX-RTK and the dual antenna SPEEDBOX-INS "RF 1" is connected to the master (rear) antenna and "RF 2" to the supplementary (front) antenna.


INS Sensor Port - LEMO 1B

7 way LEMO 1B connector


INS Sensor port connector pin out details
Pin Function Voltage range
1 GND
2 +16V Supply
3 SPI Chip Select 0-5V
4 SPI Out 0-5V
5 SPI In 0-5V
6 SPI Clock 0-5V
7 External Interrupt 0-16V transition level approx 1V, internal pullup


INS - Expansion port (early DB9 Type)

9 way D-type male connector


Expansion port connector pin out details
Pin Function Voltage range
1 SPI clock 0-5V
2 SPI in 0-5V
3 SPI out 0-5V
4 SPI chip select 0-5V
5 GND
6 External GPIO 0-5V
7 +16V supply
8 Time pulse output 0-5V
9 External interrupt 0-16V transition level approx 1V,

internal pullup

Page last modified on June 06, 2019, at 01:05 PM