Signal Consulting, LLC  Model Si24BaBdMC1-50V-20A-AP1

Open-Loop, 50V 20A, Biased Analog Input, Bidirectional Motor Controller with Soft-Start/Stop, AP1 Aluminum Plate Heat Sink, LCD Port and with 5kHz or 20kHz PWM, Y-Chip

Si24BaBdMC1-50V-20A-AP1 Features: Efficient H-Bridge for Bidirectional Current Control Control Input: Active Low, with Soft-Start and Soft-Stop Motor Control Max. Current for 5 sec : 40A with AP1 as Heat-Sink Max. Continuous Current: 20A with AP1 as Heat-Sink Typical Operating Temperature at 20A: 550C with the Metal Heat-Rings Bolted to the AP1  Heat-Sink, while it is exposed to air at 250C (as shown on photograph). Two User Selectable PWM Frequency: 5KHz or 20kHz Two User Selectable Motor Acceleration/Deceleration Modes:  Using  Jumper J3. LCD Port:  5V RS232 Serial Interface Standard, 9600 Baud, 1 Start, 8 Data, No Parity, 1 Stop Adjustable Load Voltage (RPM): The average Load-Voltage (or motor RPM) is adjustable from 0V to 50V  (or max. value of Vp) in 0.83% steps . High Power-Efficiency: 98.5% typical, at 50V and 20A Optically Isolated Directional Control Signals  With AP1 Aluminum Plate as  Heat Sink Power Semiconductors: Four 90A Hex-MOSFETs Overall Dimensions: 4.0" x 3.3" x 1.4" (102 x 84 x 34mm). Components Type: 100% Solid State, NO Relays On Board: Filter Capacitors VTS diodes Snubber Circuit Ready   Bicolor LED Indicator,  (red=forward,  green= reverse) Voltage Requirement: A single DC Source Voltage (unregulated) with any voltage value from 9V to 30V (for Vp) Si24BaBdMC1-50V-20A-AP1-SD4-5Y1  Spec Sheet  (PDF)

The Si24BaBdMC1-50V-20A-AP1 is a 50V 20A, microprocessor based, high-power, Biased Analog Input, Bidirectional, Motor Controller with user selectable Soft-Start and Soft-Start features. This controller uses a single (9V to 50V at 0 to 20A) DC power supply to control the speed of a DC motor in forward or reverse direction. An onboard microprocessor generates a 5kHz or 20kHz PWM carrier signal, controls the load-power (or motor speed), controls the load-current rate (or motor acceleration and deceleration), updates the Liquid Crystal Display (LCD) and monitors the user inputs. Three active low, user selectable Jumper pins (J1, J2, J3) are provided; controlling the motor action. The user can choose between slow or fast motor acceleration/deceleration modes by short-circuiting or open-circuiting the pins labeled J3.  The slow mode, with rise-time/fall-time of 1.25Sec, is selected by short-circuit (J3 jumper installed); while the fast buildup mode, with rise-time/fall-time of 0.05s, is selected by leaving these pins open. The PWM carrier frequency is user selectable by the jumper J2, 20kHz when J2 is open and 5kHz when short. This high frequency PWM rate insures a quiet motor environment. An active low “Kill-Switch” input (J1) is used to stop the motor rotation under emergency conditions: J1 open=Run, J1 short=Stop. As the name Biased Analog Input (Ba) implies the required motor speed (or PWM pulse-duration) and rotational direction is determined by an analog Input voltage (on pin I1) raging from +2.656V to +5V for forward direction and +2.344 to 0V for reverse direction and  a small “dead-band” at 2.5V (as shown below). All inputs are optically isolated or zener-diode protected. A bicolor LED is used to monitor the motor (or load) voltage (Red = Forward, Green = Reverse). An LCD port (with 5V, RS232 Serial Interface Standard and with back-light) is provided for optional display of motor PWM data with a 2 line by 16 character format. A small (4.0”x3.3”x0.062”) AP1 Aluminum Plate heat-sink is used to operate at 20A current levels. Higher current-levels (25A or 1250W) 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 (9V to 50V) at max. continuous load current of 20A. 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 Si24BaBdMC1-50V-20A-AP1

 In this open-loop application, the PWM or motor speed and direction (in forward or reverse direction) is adjusted by an external linear 1-turn 5kW potentiometer (connected to port CN6, Signal Part number Si5Pot1-5k) The LCD module can be ordered from Signal with the part number of Si14LCD2L16CH-4PC  (2-line by 16 character serial display with 12” cable, 4-pin connector and with back-light). 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.

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

All Products Are Proudly Made in the USA