
Kelly KBS Brushless Motor Controller User’s Manual V 4.1
Chapter 2 Features and Specifications
2.1 General functions
(1) Extended fault detectionand protection. The LED flashing pattern indicates the fault
sources.
(2) Monitoring battery voltage. It will stop driving if the battery voltage is too high and it will
progressively cut back motor drive power as battery voltage drops untilit cuts out
altogether at the preset “Low Battery Voltage”setting.
(3) Built-incurrent loop and over current protection.
(4) Configurable motor temperature protectionrange.
(5) Current cutback at low temperature and high temperature to protect battery and controller.
The current begins to ramp down at 90ﹾCcase temperature, shutting down at 100ﹾC.
(6) The controller keeps monitoring battery recharging voltage during regenerative braking,
progressively cutting back current as battery voltage rises thencutting off regenaltogether
when voltage goes too high.
(7) Maximum reverse speed is configurable to half of the maximum forward speed.
(8) An RS232 port allows for configuration, programming and software upgrades using the
free Windows GUI with your PC.
(9) Provisionof a +5 volt output to supply various kinds of sensors, including Hall effect type.
(10) 3 switchinputs which are activated byconnection to Ground. Default to throttle switch,
brake switchand reversing switch.
(11) 3 analog 0-5V inputs that default to throttle input, brake input and motor temperature input
(12) Pulsed reverse alarm output.
(13) Main contactor driver.Cutting off the power if any fault is detected.
(14) Current meter to displayboth drive and regen current. Save shunt!
(15) Configurable boost switch. Enables the maximum output power achievable if the switchis
turned on.
(16) Configurable economyswitch. Limits the maximum current to half if the switch is turned on.
(17) Maximum reverse power is configurable to half power.
(18) Enhanced regen brake function. A novel ABS technique provides powerful and smooth
regen.
(19) Configurable 12V brake signal input, in lieu of motor temperature sensor.
(20) Optional joystick throttle. A bi-symmetrical 0-5V signal for both forward and reversing.
(21) Configurable motor over-temperature detectionand protection withthe recommended
thermistor KTY83-122.
(22) 3 hall positionsensor inputs. Open collector, pull up provided.
(23) Optional supply voltage 8V-30V.
Caution! Regeneration has braking effect but does not replace the function of a mechanical
brake. A mechanical brake is required to stop your vehicle. Regen IS NOT a safety feature!
Controller may stop regen, without warning, to protect itself or the battery(it won’t protect you!).