RoboteQ AX2850 user manual Cable configuration, Extending the RS232 Cable

Cable configuration

Cable configuration

The RS232 connection requires the special cabling as described in the figure below. The 9- pin female connector plugs into the PC (or other microcontroller). The 15-pin male connec- tor plugs into the AX2550.

It is critical that you do not confuse the connector’s pin numbering. The pin numbers on the drawing are based on viewing the connectors from the front (facing the sockets or pins). Most connectors have pin numbers molded on the plastic.

DB9 Female	DB15 Male
To PC	To Controller

RX Data TX Data

GND

1	1
6	9
2	2
7	10
3	3
8	11
4	4
9	12
5	5
	13
	6

14

7

15

8

Data Out Data In

GND

FIGURE 89. PC to AX2550 RS232 cable/connector wiring diagram

Extending the RS232 Cable

The AX2550 is delivered with a 4-foot cable adapter which may be too short, particularly if you wish to run and monitor the controller inside a moving robot.

RS232 extension cables are available at most computer stores. However, you can easily build one using a 9-pin DB9 male connector, a 9-pin DB9 female connector and any 3-wire cable. These components are available at any electronics distributor. A CAT5 network cable is recommended, and cable length may be up to 100’ (30m). Figure 90 shows the wiring diagram of the extension cable.

AX2550 Motor Controller User’s Manual 133