Signal Consulting, LLC 

Model Si62HFBdMC1-50V-40A-AHC 

50V-40A High-Frequency Bidirectional Open-Loop DC Motor Controller, with Integrated Heat-Sink, Active-High Control





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Si62HFBdMC1-50V-40A-AHC Features:
Power Semiconductors: Eight 120A MOSFETs.

Overall Dimensions : 6.0”x5.0”x2.6”, (152 x 128 x 66 mm).

Load Isolation: The Load must be Isolated from the  Power Source.

Max. Continuous Current: 40A with Heat-Sink (as shown).

Max. Current for 5 sec: 50A with Heat-Sink ( as shown ).

Power-Conversion Efficiency: Approx. 99.5% (at 50V, 40A).

Direction Control Type: Active High (0 to+5V).

Bidirectional Motor-Speed Controller with Soft-Start/Stop:  Motor-Speed is Controlled with 8-Bit Resolution in in forward or reverse direction and with Soft-Start and Soft-Stop Features.

Onboard PWM Generator: A 28kHz carrier frequency PWM signal with 0 to 100% Duty-Cycle control is used for Motor-Speed control in forward or reverse direction.

User Selectable Analog or Digital Motor-Speed Control Modes:  In Analog Mode, a 0V to +5V analog signal on CN10  is used for % Duty-Cycle control. In Digital Mode, a 9600 Baud RS232 signal on CN4 is used for % Duty-Cycle control.

Load Voltage Rise or Fall-Time (10% to 90%): 0.5 micro seconds.

Voltage Requirements: VP (CN1 +P to CN2 -P) 9V to 50V at 40A, unregulated DC (Absolute Max. VP=55V). And VC (CN8 pin+ to CN8 pin-) 15V to 18V at 0.1A, unregulated DC.

Load-Voltage Indicator: Bicolor LED.

Components Type: 100% Solid State, NO Relays

On Board: 
Filter Capacitors
VTS diodes
Snubber Circuit included

  For Details, Download the  Si62HFBdMC1-50V-40A-AHC-1H   Manual


The Si62HFBdMC1-50V-40A-AHC is a 50V 40A, microprocessor based, high-frequency, high-power, Bidirectional, Motor Controller with user selectable Soft-Start and Soft-Stop features. This board uses two power supplies to operate properly. A 9V to 50V DC (at 40A max.) power supply controls the speed of a DC motor (or load current) in forward or reverse direction; and a small 15V to 18V DC (at 0.1A max.) power supply is required to operate the microcontroller. An onboard microprocessor generates a 28kHz PWM carrier signal, controls the load-power (or motor speed) and controls the load-current rate (or motor acceleration and deceleration). The high frequency PWM rate insures a quiet motor environment. The user can choose between slow or fast motor acceleration/deceleration modes by short-circuiting or open-circuiting the pin labeled J1. The slow mode, with rise-time/fall-time of 1.25Sec, is selected by short-circuiting J1 (J1 jumper installed); while the fast buildup mode, with rise-time/fall-time of 0.05s, is selected by leaving this pin open (J1 jumper not installed). The motor action or load-current direction is controlled by active high control inputs, (0 to +5V) applied to Pin I1 (Forward) and/or pin I2 (Reverse) relative to Pin G (Ground) on the Connector CN6. These pins are optically isolated from the H-Bridge, providing good noise immunity for these inputs. The control actions and the required voltage levels are defined by the Truth-Table listed below. The I1 and I2 inputs are zener-diode protected. A bicolor LED is used to monitor the motor (or load) voltage (Red = Forward, Green = Reverse). All control lines (analog and digital) are sampled approximately at 80Hz rate in the fast mode (J1 jumper open), and at 8Hz rate in the slow mode (J1 jumper short).

AHC Motor Control-Action Truth-Table, (Pins on Connector CN6)


The required motor speed (or PWM pulse-duration) (in forward or reverse direction) is variable from 0% to 100% in 0.39% steps (with an 8-bit control field) using the CN10 Analog or the CN4 Digital control port. The CN10 Analog %PWM control port (0 to +5V) is selected when the jumper J2 is Open. While the CN4 Digital %PWM control port (9600 Baud RS232 control port, Full-Duplex, RS232 Serial Interface Standard, 9600 Baud, 1 Start, 8 Data, No Parity, 1 Stop Bit, 0 to 5V output) is selected when the jumper J2 is Short. The jumpers J1 and J2 are examined each time the board power is turned on; consequently, the jumper settings must be changed when the board power is turned off.

A small (6.0”x5.0”x1.0”) integrated finned heat-sink is used to operate at 40A current levels. Higher current-levels (50A) 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 operates in a wide voltage-range (12V to 50V) at a maximum continuous load current of 40A. Typical applications are: Bi-directional DC Motor-Speed Controller, Peltier Effect TE Coolers, Heat Pumps, DPDT Solid State Relay, etc. This board can be configured and programmed to perform efficiently in many customized applications.

A Typical Application of the Si62HFBdMC1-50V-40A-AHC

In this Analog %PWM control application, the %PWM or motor speed (in forward or reverse direction) is adjusted by an external linear 1-turn 5k Ohm potentiometer (Signal Part number Si24Pot1-5kMC3) and the motor direction is controlled by 2 external 0V to +5V signals connected to port CN10 (as shown above). Warning:  The connecting wires to the Load 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. Note that each connecting point on CN1, CN2, CN5, and CN7 are available at 2 places, thus two smaller wires can be used in place of a larger one. On these connectors, each Pin is rated 32A (or 64A Jointly).

Note: If Buying the Si62HFBdMC1-50V-40A, it is recommended to buy one or more Network Accessories .

Si62HFBdMC1-50V-40A-AHC   50V at 40A, High-Frequency Bidirectional Motor Controller with Integrated  Heat-Sink, Active High Cont. 
Price $499.00
Si24Pot1-5kMC3 , 1Turn, Linear Taper, 5kW Potentiometer with 12" leads and 3-Pin Molex 22-01-3037 Connector.
Price $16.00
Si25-DB9cable1 , 1m long Network Cable Assembly with 9-pin female DB9  connector.
Price $19.00

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



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