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DC Motor Speed Control Drive · 115/230 VAC input · 90/180 VDC output · NEMA 1 enclosed · KB Electronics KBMD-240D
SKU: KB-KBMD-240D
Enclosed SCR DC motor speed control for 115/230 VAC single-phase input and 90/180 VDC armature motors. The KBMD-240D is commonly used for conveyors, pumps, fans, and machinery where adjustable acceleration and broad motor HP matching are needed through the correct plug-in horsepower resistor.
What this product is for
The KBMD-240D is an enclosed SCR DC motor speed control for variable speed operation of permanent magnet and shunt wound DC motors. It is built for 115/230 VAC single-phase input and 90/180 VDC armature output applications in industrial and light commercial equipment.
Use for
Use for conveyors, pumps, fans, machine tools, and process equipment that need adjustable motor speed, controlled acceleration, and compact wall or panel mounting. It is a practical choice where a NEMA 1 enclosed DC drive is preferred over an open chassis control.
Avoid for
Avoid for AC induction motors, washdown areas, outdoor locations, or applications requiring regenerative braking. This model is a DC SCR drive and must be matched to the correct DC motor voltage and horsepower resistor.
Best for
Best for retrofit and OEM DC motor applications where one enclosed drive needs to cover multiple motor sizes. It is especially useful when the installer wants dual-voltage AC input flexibility and a packaged control with built-in operator controls.
Installed in
Typically installed in dry indoor electrical rooms, machine enclosures, production equipment, and service areas. The enclosure is NEMA 1, which is generally intended for indoor use only.
Why this product exists
This drive gives electricians and maintenance teams a compact way to control DC motor speed from a 115/230 VAC supply without changing to a larger drive platform. The plug-in horsepower resistor system lets one model cover a wide motor range, which can simplify stocking and replacement planning.
Compared with similar products
Compared with open chassis DC controls, the KBMD-240D adds a factory enclosure for cleaner installation and basic personnel protection. Compared with AC variable frequency drives, this unit is intended for DC motors, not 3-phase AC motors. Optional heatsink use can extend the drive from 0.75 HP to 1 HP on 90 VDC motors and from 1.5 HP to 2 HP on 180 VDC motors. Actual performance depends on motor selection, resistor matching, load profile, ventilation, and local electrical code.
Specifications
- Manufacturer part number: KBMD-240D
- Brand: KB Electronics
- Product family: KBMD Multi-Drive
- Drive type: SCR DC motor speed control
- Enclosure: NEMA 1 / IP50
- Input voltage: 115/230 VAC, 50/60 Hz, single-phase
- Armature output: 90/180 VDC
- Maximum horsepower: up to 0.75 HP at 90 VDC and 1.5 HP at 180 VDC standard; up to 1 HP at 90 VDC and 2 HP at 180 VDC with auxiliary heatsink
- Current rating: 11 A max listed by distributor source
- Motor matching: requires plug-in horsepower resistor
- Control features: adjustable acceleration and deceleration
- Typical operating temperature listed by distributor: 32 to 122 F (0 to 50 C)
- Approvals listed by distributor: UL, cUL
- Approximate weight listed by distributor: 3 lb (1.4 kg)
- EnclosureNEMA 1 / IP50
- Input Voltage115/230 VAC, 50/60 Hz, single-phase
- Maximum Horsepowerup to 0.75 HP at 90 VDC and 1.5 HP at 180 VDC standard; up to 1 HP at 90 VD
- Product FamilyKBMD Multi-Drive
- Current Rating11 A max listed by distributor source
- Drive TypeSCR DC motor speed control
- BrandsKB Electronics
- Stock in Elmira1
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