Aaeon SBC-670S Manual page 32

The SBC-670S CPU card has two USB Connetors, their connection
pin assignment is as follows.
Pin
1
2
3
4
The parallel port is normally used to connect the CPU card to a
printer. The SBC-670S includes an on-board parallel port, accessed
through PRINTER, a 26-pin flat-cable connector. The card comes
with an adapter cable which lets you use a traditional DB-25
connector. The cable has a 26-pin connector on one end and a DB-
25 connector on the other, mounted on a retaining bracket. The
bracket can be installed at the end of an empty slot in your chassis,
giving you access to the connector.
To install the bracket:
1. Find an empty slot in your chassis.
2. Unscrew the plate that covers the end of the slot, and screw in
the bracket.
3. Attach the flat-cable connector to PRINTER on the CPU card.
Wire 1 of the cable is red or blue, and the other wires are gray.
Make sure that wire 1 corresponds to pin 1 of PRINTER. Pin 1 is
on the right side of PRINTER.
Function
Vcc
DATA -
DATA +
GND