Datasheet

SDC21xx Motor Controller Datasheet 5
Use of Safety Contactor for Critical Applications
Use of Safety Contactor for Critical Applications
An external safety contactor must be used in any application where damage to property or injury to person can
occur because of uncontrolled motor operation resulting from failure in the controller’s power output stage.
The contactor coil must be connected to a digital output configured to activate when “No MOSFET Failure”. The
controller will automatically deactivate the coil if the output is expected to be off and battery current of 500mA or
more is measured for more than 0.5s. This circuit will not protect against other sources of failure such as those
described in the “Important Safety Disclaimer” on page 3.
Single Channel Wiring
The single channel version of the controller (SDC2130S and SDC2160S) require that the output be parallel and
that the load be wired as shown in the diagram below.
Important Warning
This wiring is only possible on controllers fitted with the Single Channel version of the firmware. Dual
channel controllers will be damaged if wired as single channel. Verify that the PC utility identifies the con-
troller as SDC2130S or SDC2160S before applying power to the load.
PwrCtrl
SW1 Main
On/Off Switch 1A
F2
1A
Diode
>20A
Resistor
1K, 0.5W
+-
F1
I/O Connector
VMot
to +40V Max
Digital Out
Ground
Ground
Main
Battery
FIGURE 10. Contactor wiring diagram
M
M1+ M1- M2+ M2-
FIGURE 11. SDC2130S and SDC2160S wiring diagram