B100-to-PC Serial Cable

B100-to-PC Serial Cable

To load a new software image, the B100 is connected to the PC via a serial cable. Here's the info you need to make such a cable.

To connect to the PC serial port, you need a 9-pin female DB9 connector. The pin numbers are marked on the DB9 connector.

The B100 serial port uses an RJ-11 connector. The RJ-11 connector looks like a standard USA modular phone connector, but it uses 6 wires (not like some connectors which just use 4 wires). You need a male RJ-11 connector to plug into the B100 (where the GPS usually plugs into the system unit).

Number the connectors on the RJ-11 as follows. Hold the RJ-11 connector so that:

you are looking into the end of the connector that mates with the B100, and

the locking tab is on down.

The left-most pin is pin 1, and the right-most pin is pin 6.

Connect three wires as follows:

B100 RJ-11 pin Function DB9 pin

1 ground 5

2 B100 COM1 TX -> to PC RX 2

3 B100 COM1 RX <- from PC TX 3

4 B100 COM2 TX -> to GPS none

5 B100 COM2 RX <- from GPS none

6 ground none

B100 RJ-11 pin	Function	DB9 pin
1	ground	5
2	B100 COM1 TX -> to PC RX	2
3	B100 COM1 RX <- from PC TX	3
4	B100 COM2 TX -> to GPS	none
5	B100 COM2 RX <- from GPS	none
6	ground	none