/Products/VFD's & Soft Starters/KB Electronics/KBCC/KBCC-225R KB Electronics Chassis Mount Variable Speed DC Motor Control
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Product ID: KB9924

KBCC-225R KB Electronics Chassis Mount Variable Speed DC Motor Control

MFG: KB Electronics, Inc
MFG Part Number: 9924

Available Stock: 2
Selected accessories will also be added to cart
$308.70 / Each
3HP @ 230VAC 50/60Hz. Max: 16A DC, 24A AC


The KBCC chassis control utilizes the KBMM™ modular control to provide a low-cost, reliable, variable speed SCR drive for PM and Shunt Wound DC motors. Models with the “R” suffix contain the KB APRM® which provides anti-plug “instant” reverse and solid state dynamic braking. All models are equipped with KB’s exclusive Plug-in Horsepower Resistor®. It eliminates the need for recalibrating IR Comp and Current Limit when the control is used on various horsepower motors. The controls also contain Inhibit™ which allows for electronic switching of the armature voltage and Auto Inhibit® which provides rapid safe switching of the AC line.

The KBCC controls are built on a rugged aluminum heatsink and contain AC line and armature fusing, a 5K ohm remote potentiometer, and a barrier terminal block. In lieu of the potentiometer, the control can be operated in a voltage following mode by supplying an isolated analog signal (0-9VDC) to the input terminals P2 (+) and F-. Adjustment trimpots are provided for MIN, MAX, IR COMP, CL, ACCEL and DECEL.


Manufacturer KB Electronics
Part Number 9924
Model Number KBCC-225R
Type Reversing
AC Line Input 230 VAC +/-15%
Single Phase
Maximum Input Current 24.0 Amps
Fuse/Circuit Breaker Rating 25 Amps
Max Output Power 3 HP
2.3 kW
16 Amps
Net Weight 4.5 lbs
Warranty 18 Month Limited Warranty


Speed Range (Ratio) 50:1
Load Regulation (0-Full Load, 50:1 Speed Range) 1% Base Speed
Line Voltage Regulation (at Full Load, +/-15% Line Variation) 1/2% Base Speed
Control Linearity 2% Speed vs Dial Rotation
CL Torque Range 0 – 200% Full Load
Accell/Decel Time Range 0.2 – 10 Seconds
MIN Speed Trimpot Range 0 – 30% Full Speed
MAX Speed Trimpot Range 50-120% Full Speed
Max Allowable Amb Temperature 45°C
Max Number of Starts/Stops/Reversals 30 Operations/Minute

Standard Features

Tachometer or Armature Feedback

Plug-in Horsepower Resistor® (Sold Separately)

Built-in AC Line and Armatures Fuses (Armature Fuse Sold Separately)

MOV Transient Protection


Rugged Aluminum Heatsink

Voltage Following

Auto Inhibit®, Inhibit™ and Enable

CL LED Indicator

Special Features

"R" Suffix Only


Anti-plug Instant Reverse


Auxiliary Trimpot for Speed Adjustment

Rapid Cycling


  • Transfer Pumps
  • Door Openers
  • Feeders
  • Indexers
  • Tapping Machines
  • Conveyors
  • Robotics
  • Screen Presses
  • Exercise Equipment

Plug-In Horsepower Resistor Chart

Motor HP
(90-130VDC Armature)
Motor HP
(180VDC Armature)
Resistance Part No.
1/100 to 1/50 HP 1/50 to 1/25 HP 1.0 Ohms 9833
1/50 to 1/30 HP 1/25 to 1/15 HP 0.51 Ohms 9834
1/30 to 1/20 HP 1/15 to 1/10 HP 0.35 Ohms 9835
1/20 to 1/12 HP 1/10 to 1/6 HP 0.25 Ohms 9836
1/12 to 1/8 HP 1/6 to 1/4 HP 0.18 Ohms 9837
1/8 to 1/5 HP 1/4 to 1/3 HP 0.1 Ohms 9838
1/4 HP 1/2 HP 0.05 Ohms 9839
1/3 HP 3/4 HP 0.035 Ohms 9840
1/2 HP 1 HP 0.025 Ohms 9841
3/4 HP 1.5 HP 0.015 Ohms 9842
1 HP 2 HP 0.01 Ohms 9843
1.5 HP 3 HP 0.006 Ohms 9850