RoboteQ AX2850 - Manual (Page 17)

AX2550 Motor Controller User’s Manual 17
Connecting to the Batteries and Motors
Connecting to the Batteries and Motors
Connection to the batteries and motors is shown in the figure below and is done by con-
necting the set of wires coming out from the back of the controller.
1- Connect each motor to one of the two M+ and M- cables pairs. Make sure to respect
the polarity, otherwise the motor(s) may spin in the opposite direction than expected
2- Connect the two thick black wires to the minus (-) terminal of the battery that will be
used to power the motors. Connect the two thick red wires the two VMot terminals to the
plus (+) terminal of the battery. The motor battery may be of 12 to 40 Volts. There is no
need to insert a separate switch on Power cables, although one is suggested for Emer-
gency disconnect. See “Controller Power” on page 30 for a detailed discussion and more
wiring options.
Avoid extending the length of wires from the battery to the controller as the added induc-
tance may cause damage to the controller when operating at high currents. Try extending
the motor wires instead since the added inductance on the motor side of the controller is
not harmful.
The two red wires are connected to each other inside the controller. The same is true
for the black wires. You should wire each pair together as shown in the diagram
above.
3- The yellow Power Control wire and the thin black wire MUST be connected to Ground to
turn the Controller Off. For turning the controller On, even though the Power Control may
be left floating, whenever possible pull it to an unfused12V or higher voltage to keep the
controller logic solidly On. You may use a separate battery to keep the controller alive as
the main Motor battery discharges. Refer to the chapter “Connecting Power and Motors to
12V to 24V
Motor Battery
Power switch
On
Off
Optional
Emergency
Disconnect
Optional
Diode
-
-
+
+
Motor1
Motor2
Controller
Fuse
VMot VMot
M1
-
M1+
PwrCtrl
GND GND GND M2+
M2-
Notes:
- The Battery Power connection are doubled in order to provide the maximum current to the controller. If
only one motor is used, only one set of motor power cables needs to be connected.
- Typically, 1, 2 or 3 x 12V batteries are connected in series to reach 12, 24 or 36V respectively.
- The Power Control wire MUST be used to turn On and Off the controller.
FIGURE 3. AX2550 Electrical Power Wiring Diagram