RoboteQ Dual Channel Digital Motor Controller AX500 - Manual (Page 30)

Connecting Power and Motors to the Controller
30 AX500 Motor Controller User’s Manual Version 1.9b. June 1, 2007
Converting the AX500 to Single Channel
The AX500 can be easily modified into a Single Channel version by placing a jumper on the
PCB. This step must be undertook only if you have the proper tooling and technical skills.
• Disconnect the controller from power
•
Place a drop of solder on the PCB jumper pad shown in Figure 12 .
Before paralleling the outputs,
•
Place the load on channel 1 and verify that it is activated by commands on channel
1.
•
Then place the load on channel 2 and verify that is also activated by commands on
channel 1.
•
Commands on channel 2 should have no effects on either output.
It will be safe to wire in parallel the controller’s outputs only after you have verified that
both outputs react identically to channel 1 commands.
Power Fuses
For low Amperage applications (below 30A per motor), it is recommended that a fuse be
inserted in series with the main battery circuit as shown in the Figure 9 on page 27.
The fuse will be shared by the two output stages and therefore must be placed before the
Y connection to the two power wires. Fuse rating should be the sum of the expected cur-
rent on both channels. Note that automotive fuses are generally slow will be of limited
effectiveness in protecting the controller and may be omitted in high current application.
The fuse will mostly protect the wiring and battery against after the controller has failed.
Important Warning
Single Channel
Jumper "open"
Place solder ball to
close jumper and
enable single channel
mode
FIGURE 12. AX500 Solder Jumper setting for Single Channel Operation