Signal Consulting, LLC 

 Model Si5HyUdMCAF1-50V-20A

Single, 50V 20A, Closed-Loop, Hybrid, Unidirectional, Motor Controller

with Integrated Heat Sink, Analog Feedback Port and with 5kHz or 20kHz PWM, T-Chip





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 Si5HyUdMCAF1-50V-20A Features:
Power Semiconductors: Two 60A MOSFET
Max. Continuous Current: 20A with Heat Sink Shown
Max. Current for 5 sec: 40A with Heat Sinks Shown
Overall Dimensions: 2.4" x 2.3" x 1.75" (61 x 58 x44mm).
Components Type: 100% Solid State, NO Relays

  A single DC Motor or Load is controlled  by a Pulse Width Modulator (PWM).

Jumper Selectable Control Modes: Open-Loop Mode when CN3 is Open, Closed-Loop Mode when CN3 is Short.

 Jumper Selectable PWM Carrier Frequency:  20kHz when jumper CN4 is open, 5kHz when CN4 is Short. 

Jumper Selectable Step-response Time:  0.05sec when J1 is Open, 0.5sec when J1 is Short.

  The Load-Voltage is adjustable from 0V to Vp with  an analog control signal (VI1,G )or with an internal or external potentiometer.

  High Power-Efficiency: 97.5% typical, at 50V and 20A

On Board:
Filter Capacitors
VTS diodes
Snubber Circuit Ready
Voltage Requirement:
A single DC Source Voltage (unregulated) with any voltage value from 9V to 50V (for Vp)



 Si5HyUdMCAF1-50V-20A-7T, Spec Sheet  (PDF)

The Si5HyUdMCAF1-50V-20A is a 50V 20A, microprocessor based, Single, Hybrid, Closed-Loop, Unidirectional, Motor-Controller board with an Integrated Heat Sink and with an Analog Feedback Port. This board uses pulse-width modulation (PWM) to efficiently control the speed of a brush type DC motor (or load current) in open or closed loop control mode in the 0 to 1000W power range, and in 8.3W steps. An onboard microprocessor generates a 5kHz or 20kHz PWM carrier signal, regulates the motor speed, controls motor the acceleration/deceleration, and monitors the sensor inputs. The PWM carrier frequency is user selectable by the jumper CN4, 20kHz when CN4 is open and 5kHz when short. The high frequency PWM rate provides a smooth motor-speed control, and insures a quiet motor environment. As the name hybrid (Hy) implies, the desired motor speed (or PWM pulse-duration) is set by a variable  analog input-voltage VI1,G (0 to +5V, applied to pin I1 relative to pin G, on port CN5) providing a smooth motor-speed control from 0 to 100% in 0.833% steps while the other control signals are digital. The user can choose between open-loop or closed-loop modes by short-circuiting or open-circuiting the pins labeled CN3.  An open-circuit (no jumper) selects the open-loop mode, while short-circuit (jumper installed) selects the closed-loop mode. In closed-loop mode, the external analog voltage VI2,G (0 to 5V, applied to pin I2 relative to pin G on port CN5) provides the feedback, keeping the motor-shaft rotating at a constant speed. These two analog input pins (I1, I2) are zener-diode protected. An onboard LED (red) is used to monitor the load-voltage. A small (2.3”x2.4”x0.45”) finned integrated heat sink is included with mounting hardware (as shown on the photograph) to operate at 20A or 1000W power levels. Higher power-levels (50V, 30A or 1500W) can be achieved with more efficient heat-sinks. Please click on this link and read the Board Mounting Instructions and Heat Sink Selection Guide. This board requires a single 9V to 50V DC power source (unregulated and unfiltered) at a 0A to 20A current range to operate normally. Typical applications are: DC Motor-Speed Controller, Light-Dimmer with variable delay, Power Amplifier, SPST Solid State Relay, etc. This board can be configured and programmed to perform efficiently in many customized applications. 

A Typical Application of the Si5HyUdMCAF1-50V-20A

In this closed-loop application (shown below), the shaft-speed of a 24V DC Motor is controlled and regulated by the external analog feedback-voltage VI2,G (voltage at I2 relative to G, on port CN5). While the desired motor speed (or PWM pulse-duration) is linearly adjusted with the Si5Pot1-5k accessory (an external 1-turn 5kW pot); from 0 to 1000W range in 8.3W steps. These two analog voltages (VI1,G  and VI2,G with range of 0 to +5V) are efficiently controlling the motor power and maintain a constant motor speed.

The DC Motor can be purchased from Bodine, ; or from other vendors, .

Warning:  The connecting wires to the Motor and the Power Supply must be heavy gauge copper wire (#12 AWG or heavier) to handle the rated current level. In addition, these heavy gauge wires act as a heat sink, protecting the board from overheating.

Si5HyUdMCAF1-50V-20A, Hybrid Unidirectional Motor Controller, Heat Sink, Analog Feedback, 1 Load 50V, 20A
Price $179.00

Note: If Buying the Si5HyUdMCAF1-50V-20A, it is recommended to buy one Si5Pot1-5k Potentiometer.

Si5Pot1-5k   1-Turn, Linear Taper, 5kW Potentiometer.
Price $15.00

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Availability: We usually ship in 2-3 business days.



All Products Are Proudly Made in the USA