The BH8-280 Bottom Connector is a 10 pin Hirose, Part number H2853-ND

The proper mating connector housing is a Hirose DF11-10DS-2C.

Typical sockets include Hirose DF11-2428SC (application and wire-gauge dependant).

All available at ​http://www.digikey.com/

Pin	Signal
1	48V
2	Power GND
3	User line 1 (USB 5V)
4	User line 2 (USB data-)
5	RS232TX/CANH
6	RS232RX/CANL
7	User line 3 (USB data+)
8	User line 4 (USB GND)
9	Earth ground
10	No Connection