Datasheet

4 SDC21xx Motor Controller Datasheet Version 1.3. April 05, 2014
The diagram below shows how to wire the dual-channel controller and how to turn power On and Off.
Important Warning
Carefully follow the wiring instructions provided in the Power Connection section of the User Manual. The
information on this datasheet is only a summary.
Mandatory Connections
It is imperative that the controller is connected as shown in the above diagram in order to ensure a safe and trou-
ble-free operation. All connections shown as thick black lines line are mandatory. The controller must be powered
On/Off using switch SW1on the Power Control Header.
Emergency Switch or Contactor
The battery must be connected in permanence to the controller’s VMot power via an input emergency switch or
contactor SW2 as additional safety measure. The user must be able to deactivate the switch or contactor at any
time, independently of the controller state.
Precautions and Optional Connections
Note 1: Optional backup battery to ensure motor operation with weak or discharged battery.
Note 2: Use precharge 1K Resistor to prevent switch arcing.
Note 3: Insert a high-current diode to ensure a return path to the battery during regeneration in case the fuse is
blown.
Note 4: Optionally ground the VMot wires when the controller is Off if there is any concern that the motors could
be made to spin and generate voltage in excess of 35V.
Note 5: Beware not to create a path from the ground pins on the I/O connector and the battery’s minus terminal.
Motor 1
VMot
PwrCtrl
SW1 Main
On/Off Switch 1A
F2
1A
Diode
>10A
Resistor
1K, 0.5W
+-
SW2
Emergency
Contactor or
Cut-off Switch
F1
M1+
M1-
M2+
M2-
I/O Connector
Ground
Ground
Motor 2
Main
Battery
Backup
Battery
Note 5
Do not Connect!
Note 1
Note 4
Note 3 Note 2
FIGURE 9. Powering the controller. Thick lines identify MANDATORY connections