products/Si24HyBdMC1-50V

Signal Consulting, LLC

Model Si25NeBdMC1-50V-20A

Networkable, Bidirectional, Open-Loop, 50V 20A, Motor Controller with RS232 Serial Port, Integrated Heat Sink and with 20kHz or 5kHz PWM, B-Chip

Si25NeBdMC1-50V-20A Features:

Efficient H-Bridge: for Bidirectional Current Control
Directional Control: with ASCII Command-Characters
Max. Current for 5 sec : 40A with Proper Heat-Sink Installed
Max. Continuous Current: 20A with Proper Heat-Sink

Two User Selectable PWM Frequency: 5KHz or 20kHz

Two User Selectable Motor Acceleration/Deceleration Modes: Using Jumper on Port J1.

Networkable RS232 Port: For Set Duty-Cycle Input, and for Measured Duty-Cycle Output. Up to 16 Boards can be interconnected to form a 3-wire Local Area Network, LAN.

Optional LCD Port: For Set and Measured RPM Display

High Power-Efficiency: 98.5% typical, at 50V and 20A
Optically Isolated Directional Control Signals
Power Semiconductors: Four 60A Hex-MOSFETs
Board's Size: 2.9" x 2.9" x 1.9" (7.4cm x 7.4cm x 4.8cm).
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 and Unfiltered) with any voltage value from 9V to 50V (for Vp)

Si25NeBdMC1-50V-20A Spec Sheet (PDF)

The Si25NeBdMC1-50V-20A is a 50V 20A, networkable, microprocessor based, high-power, Bidirectional, Motor Controller that 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), monitors the user inputs and controls the RS232 Network Port. The PWM carrier frequency is user selectable by the jumper J2, 5kHz when J2 is open and 20kHz when short. The jumper J2 is examined only at power turn-on. This 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 pins labeled J3. The slow mode, with rise-time/fall-time of 0.5s, is selected by open-circuit (J3 jumper NOT installed); while the fast buildup mode, with rise-time/fall-time of 0.05s, is selected by shorting these pins (Jumper installed as shown on the application diagram). All control lines are sampled approximately at 80Hz rate in the fast mode (J3 jumper short), and at 8Hz rate in the slow mode (J3 jumper open). As the name (Ne, Networkable) implies, the required motor speed (PWM pulse-duration and direction) is variable from 0 to + or -100% in 0.83% steps by using ASCII command strings on the RS232 Network Port; or it can changed by using external UP/DOWN keys connected to NC4. The RS232 data format and the Local Area Network (LAN) commands are described on the next page. A “Kill-Switch” (connected to J1) is used for emergency motor-stop (switch open=Motor Runs, Switch closed=Motor Stop with zero current, as shown on the application drawing below). All control 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 optional LCD port (with HITACHI HD44780 Interface Standard and with back-light) is provided for optional display of motor RPM data in a 2 line by 20 character format. A small (3.0”x3.0”x0.8”), integrated Aluminum heat-sink is used to operate at 20A current levels. Higher current-levels (25A or 1200W) can be achieved with more efficient heat-sinks. Please click on this link and read the Board Mounting Instructions and Heat Sink Selection Guide. A flashing green LED indicates that the microprocessor is operating properly. 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, Proportional Valve-Coil Controller, DPDT Solid State Relay, etc. This board can be configured and programmed to perform efficiently in many customized applications.

A Typical Application of the Si25NeBdMC1-50V-20A

In this open-loop application, the PWM or motor speed (in forward or reverse direction) is adjusted by command strings derived from a Personal Computer (PC) using the Microsoft “Hyper Terminal” program (or any-other ASCII controller) operating at 9600 Baud, 1 start-bit, 8 data-bits, 1 stop-bit, No parity-bit. The optional LCD module can be ordered from Signal as part number of Si24LCD2L20CH (2x20 display with 8” ribbon cable and 14-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.

Command Format and Local Area Network (LAN) for the Si25NeBdMC1-50V-20A

Each board has a unique, 4-bit, none-volatile, Node-Address (ranging from 0,1….9, A..F); this can be changed by a LAN command (the factory default address is 1). The board uses a modified version of the RS232 serial-data communication standard, where the output-voltage (on pin I2, CN6) ranges from 0 to +5V (rather than the usual -12V to +12V). In addition, this output pin is normally an open circuit and it will only output a serial TTL binary bit-stream when properly referenced by its Node-Address. The serial data input-voltage (on pin I1, CN6) has the standard range of -12V to +12V. The serial data-format is: 9600 Baud Rate, 1 Start-Bit, 8 Data-Bits, 1 Stop-Bit, and no Parity-Bit.

These features allow the creation of a Local Area Network (LAN) with up to 16 nodes (boards). A typical 3-wire LAN with “Star Topology” is shown below. Note that the control lines (G, I1, I2) with the same name are connected together (or the boards are connected in parallel) and driven by an ASCII controller (or PC), equipped with an RS232 serial port, operating at 9600 Baud rate.

Command Rules:

1. All Commands are ASCII character strings (Chars.). An ASCII string is denoted here with Bold Red Letters (Characters).

2. Each string is terminated by a Carriage Return Character, (CR). The only exception is the N command.

3. Upper-Case Letters are used for Output Commands; and Lower-Case Letters are used for Input Commands.

4. The 1^st Char. in a string is either capital N or a Hex-Digit Node Address (0, to F). If the 1^st Char. is an N, it denotes a query to all boards on the LAN to output their Node Address and Program Name.

5. If the 1^st Char. is a Hex-Digit (0,1..,9,A,B,C,D,E,F), it directs the rest of the command string to the board that has this address.

6. The 2^nd Char. in the string is the Command Character that operates on the addressed board.

7. The 3^rd, 4^th, 5^th and 6^th Chars. represents the value of the input data. Where + numbers denote forward rotational values; and - numbers denote reverse rotational values.

8. The last Char. in the sequence is always the string terminator, (CR).

Command Examples:

Ex#1. Com. String: N Action: All boards on the LAN will output their Address and Program Name.

Ex#2. Com. String: 1n5(CR) Action: Change Board 1 Address in EPROM from 1 to 5.

Ex#3. Com. String: 1M(CR) Action: Board 1 outputs its Set and Measured % PWM.

Ex#4. Com. String: 2m25(CR) Action: Change Board 2 PWM to 25.0% in Forward Direction.

Ex#5. Com. String: 2m+25.0(CR) Action: Change Board 2 PWM to 25.0% in Forward Direction.

Ex#6. Com. String: 2m-25(CR) Action: Change Board 2 PWM to 25.0% in Reverse Direction.

Ex#7. Com. String: 2m-25.0(CR) Action: Change Board 2 PWM to 25.0% in Reverse Direction.

Si25NeBdMC1-50V-20A, Networkable Bidirectional Motor Controller Board

Price $249.00

Optional Si24LC2L20CH 2 Line by 20 Character LCD with 8" long ribbon cable and 14-pin connectors.

Price $59.00

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

All Products Are Proudly Made in the USA