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SLx Series

Programmable DC Power Supply

Building on over 40 years of power supply innovation and with over 26,500+ different model configurations, the SLx Series is Magna-Power’s most versatile programmable DC power supply series ever created. The SLx Series offers models at 6 different power levels, with highly granular range of voltages and currents. With industry-leading power density, rugged current-fed power processing, and the state-of-the-art MagnaLINK™ distributed DSP digital control architecture, the SLx Series meets the long-term DC power requirements of research & development, industrial automation, and process control applications.


Key Features

  • Voltage, current, and power control
  • Rugged current-fed power processing
  • 16-bit precision with single bit control
  • SCPI and Modbus command sets
  • Programmable protection features
  • Interlock and hardware emergency stop
  • Slew rate control
  • Continuous full power operation up to 50°C ambient
  • Configurable analog-digital 26-pin I/O port
  • Digital-hybrid MagnaLINK™ master-slaving
  • Local, remote, and leadless voltage sensing
  • USB (front and rear) and RS485 interfaces standard
  • CAN, EtherCAT, EtherNet/IP, LXI TCP/IP Ethernet, ModbusTCP, and PROFINET fully integrated communications options available
  • MagnaCTRL software platform included
  • Made in the USA

Build-Time: 13-16 Weeks

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SLx Series  Image

MagnaLINK™ Distributred Digital Control

Magna-Power developed its MagnaLINK™ digital control platform from the ground up to utilize an array of four Texas Instruments DSPs distributed across various internal assemblies. High-speed board-to-board communications is achieved between DSPs utilizing an internally developed low-level communication protocol. A custom bootloader ensures long-term support with multi-target firmware updates and synchronization. New capabilities are achieved with the MagnaLINK digital architecture, some of which include: slew rate control, gain modification, 16-bit precision, 100 ppm stability, user-defined sequencing and function generation, and digital hybrid master-slaving.

SLx Series  Image

Made in the USA, Available Worldwide

MagnaDC programmable DC power supplies are designed and manufactured at Magna-Power’s 73,500 sq-ft vertically integrated USA manufacturing facility in Flemington, New Jersey. From raw materials to the completed product, Magna-Power has insourced nearly the entire production process to maintain complete control of quality, cost, and build-time. Heat-sinks and various metal assemblies are machined through both automated CNC and EDM. Sheet metal is cut, punched, sanded, bent, and powder coated in-house. Magnetics are wound-to-order from validated designs based on a model’s voltage and current. A full surface mount technology (SMT) with multiple stages of 3D automated optical inspection ensures high-quality printed circuit board assemblies. Finally, after assembly, products undergo comprehensive test and calibration, followed by an extended burn-in period.

Products are sold directly from the factory and through distribution, with a service network around the world.

Reliable Current-Fed Power Processing

All MagnaDC programmable DC power supplies utilize high-frequency IGBT- and MOSFET-based power processing in current-fed topology. This topology adds an additional stage over the conventional voltage-fed topology for enhanced control and system protection, ensuring that even under a fault condition, the power supply will self-protect. Due to the self-protecting characteristics of this topology, the possibility of fast rising current spikes and magnetic core saturation is eliminated. This topology coupled with state-of-the-art Silicon Carbide (SiC) power semiconductors enables the SLx Series to deliver class-leading power density, reliability and efficiency with continuous full-power operation up to 50°C ambient.

Read Technical Article

SLx Series  Image
SLx Series  Image

Intuitive, Bright, Long-Lasting Front Panel Interface

Prioritizing brightness and reliability, the SLx Series features of a hybrid display with bright green segments for voltage and current output and a multi-line display for power measurement, settings configuration, and status messages. A black-anodized machined aluminum control knob enables precise dialing of control set points, while a 10-digit key and arrow buttons provide digital set point inputs with 16-bit precision. In addition, a dedicated Lock button enables users to lock out the front panel to prevent unwanted changes from the front panel. Easily connect a computer to the SLx Series without going behind it by using the front panel USB port; a rear-mounted USB port is also provided.

SLx Series  Image

Communication Interfaces for Industrial Control

SLx Series power supplies come standard with Dual USB (front and back) and RS485. Options are available to provide seamless fully integrated communication for either traditional TCP/IP network control (SCPI or Modbus) or through direct control over industrial communication interfaces (Modbus). Magna-Power has taken significant measures to ensure comprehensive command-set support and documentation across the following optional interfaces:

  • CANopen (+CAN)
  • EtherCAT (+ECAT)
  • EtherNet/IP (+EIP)
  • LXI TCP/IP Ethernet (+LXI)
  • Modbus-TCP (+MTCP)
  • PROFINET (+PROF)

Standard Safety Features with Emergency Stop

The SLx Series features a soft-start circuit to eliminate large peak in-rush currents from the AC mains, ensuring AC current draw never exceeds the current draw at full load. The SLx Series programmable DC power supplies have extensive safety and diagnostic functions, including:

  • AC Phase Loss
  • Over Voltage Trip (Programmable)
  • Over Current Trip (Programmable)
  • Over Power Trip (Programmable)
  • Cleared Fuse
  • Over Voltage on Program Line Input
  • Over Temperature on Internal Heatsink or Output Capacitors
  • Internal Communications Fault
  • Interlock and Emergency Stop Fault

When a fault is detected, the power supply immediately shuts down power processing circuit, utilizing the immediate one-shot trip (OSHT) zone event for inverter PWM channels. Users can easily identify faults using the Status message display or by SCPI/Modbus commands.

Finally, both interlock and emergency stop features are included as standard. The interlock feature provides a 5V interlock input, which when coupled with the provided 5V reference signal, allows for a dry contact to easily trigger a latching interlock fault, while maintaining control power. A separate emergency stop feature bypasses all logic and processors to provide a hardware-only path to easily interrupt AC power to the SLx Series power supply with a 24V signal, providing a full hardware shutdown.

SLx Series  Image

Plug & Play Master-Slaving

The SLx Series includes Magna-Power’s next-generation digital hybrid master-slaving interface via dual digital MagnaLINK communication ports. With support up to 12 units in a master-slave set, users can easily expand their current capability by adding more units in parallel. A secondary current sense connection is provided, which provides real-time analog current feedback to the master, enabling reliable, high-accuracy measurement aggregation to a single display.

SLx Series  Image

Target Diagnostics for Easy Field Servicing

The SLx Series introduces Magna-Power’s Target Diagnostics feature, mapping the status LEDs for every major assembly to a rear mounted LED matrix. This LED matrix provides the statuses of each internal assembly, easily allowing users or support teams to understand faults or configuration issues, while keeping products mounted and covers on. The Target Diagnostics feature coupled with MagnaCTRL’s EPROM editor offers a robust suite of remote support tools to effectively reduce downtime.

Software Integration with Ease

With standard support for Standard Commands for Programmable Instrumentation (SCPI) and Modbus, SLx Series power supplies provide an easy-to-use API with well-documented commands in readable text. Over 60 commands allow programmatic access to product registers, starting and stopping the product, control of voltage, current and power, slew rate control, high-accuracy measurement queries, and product configuration. Simple scripting or complex software can be achieved, with extensive documentation and examples provided by Magna-Power.

import serial
magnaPower = serial.Serial(port='COM4', baudrate=19200)
magnaPower.write('*IDN?\n'.encode())
print magna_power.readline()
magnaPower.write('VOLT 0\n'.encode())
magnaPower.write('CURR 0\n'.encode())
magnaPower.write('OUTP:START\n'.encode())
magnaPower.write('VOLT 270\n'.encode())
currSetPoints = [50, 100, 150, 250]
for currSetPoint in currSetPoints:
    print 'Setting Current to %s A' % currSetPoint
    magnaPower.write('CURR {0}\n'.format(currSetPoint).encode())
    magnaPower.write('MEAS:VOLT?\n'.encode())
    print magnaPower.readline()
    time.sleep(20)
magnaPower.write('OUTP:STOP\n'.encode())
magnaPower.close()
magna_power = serial('COM4', 'BaudRate', 19200);
fopen(magnaPower);
fprintf(magnaPower,'*IDN?');
idn = fscanf(magnaPower);
fprintf(magnaPower,'VOLT 0');
fprintf(magnaPower,'CURR 0');
fprintf(magnaPower,'OUTP:START');
fprintf(magnaPower,'VOLT 270');
for currSetPoint in [50, 100, 150, 250]
    display('Setting Current to '+currSetPoint+' A');
    fprintf(magnaPower, 'CURR '+currSetPoint);
    fprintf(magnaPower,'MEAS:VOLT?');
    display(fscanf(magnaPower));
    pause(20);
end 
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <windows.h>

int main()
{
    printf("Opening connection.\n");

    uint8_t recvBuffer[sizeof(uint8_t) * 256];
    memset(recvBuffer, 0, 256);

    // Choose the serial port name.  
    // COM ports higher than COM9 need the \\.\ prefix, which is written as
    // "\\\\.\\" in C because we need to escape the backslashes.
    const char* device = "\\\\.\\COM4";

    // Choose the baud rate (bits per second).  
    uint32_t baud_rate = 9600;

    HANDLE port = open_serial_port(device, baud_rate);
    if (port == INVALID_HANDLE_VALUE) { return 1; }

    char* scpiCmd = (char*)"*IDN?\n";
    size_t cmdLen = strlen(scpiCmd);
    int result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;
   
    result = read_port(port, recvBuffer, 256);
    printf("Sent: %s\nReceived: %s\n", scpiCmd, recvBuffer);
   
    scpiCmd = (char*)"VOLT 0\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    scpiCmd = (char*)"CURR 0\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    scpiCmd = (char*)"OUTP:START\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    scpiCmd = (char*)"VOLT 270\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    char setPoints[4][5] = {"50", "100", "150", "200"};
    char setPointBuffer[40];
    scpiCmd = (char*)"MEAS:VOLT?\n";

    for (int i = 0; i < 4; i++)
    {
        sprintf(setPointBuffer, "CURR %s\n", setPoints[i]);
        printf("Setting current to %s A\n", setPoints[i]);
        cmdLen = strlen(setPointBuffer);
        result = write_port(port, (uint8_t*)setPointBuffer, cmdLen);
        if (result < 0)
            return -1;
        memset(recvBuffer, 0, 256);
        result = read_port(port, recvBuffer, 256);
        printf("Received: %s\n", recvBuffer);
        Sleep(20000);  // 20000ms = 20s
    }

    scpiCmd = (char*)"OUTP:STOP\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    CloseHandle(port);

    printf("Connection closed.\n");
    return 0;
}
using System;
using System.IO.Ports;
using System.Threading;

namespace SerialCommunicationInCSharp
{
  public class Program
  {
    static bool _continue;
    static SerialPort serialPort;

    public static void Main(string[] args)
    {
      Thread readThread = new Thread(Read);

      Console.WriteLine("Opening connection.");

      // Create a new SerialPort object with default settings.
      serialPort = new SerialPort("COM4", 19200, Parity.None, 8, StopBits.One);

      // Set the read/write timeouts
      serialPort.ReadTimeout = 500;
      serialPort.WriteTimeout = 500;

      serialPort.Open();
      _continue = true;
      readThread.Start();

      Console.WriteLine("Sending: *IDN?");
      serialPort.WriteLine("*IDN?");

      serialPort.WriteLine("VOLT 0");
      serialPort.WriteLine("CURR 0");
      serialPort.WriteLine("OUTP:START");
      serialPort.WriteLine("VOLT 270");

      string[] currSetPoints = { "50", "100", "150", "250" };
ß
      for(int i = 0; i < currSetPoints.Length; i++)
      {
        serialPort.WriteLine(String.Format("'CURR {0}", currSetPoints[i]));
        serialPort.WriteLine("MEAS:VOLT?");
        Thread.Sleep(20000);
      }

      serialPort.WriteLine("OUTP:STOP");

      Console.WriteLine("Closing connection.");
      _continue = false;
      serialPort.Close();
      }

    public static void Read()
    {
      while (_continue)
      {
        try
        {
          string message = serialPort.ReadLine();
          Console.WriteLine("Received: " + message);
        }
        catch (TimeoutException) { }
      }
    }
  }
}
SLx Series  Image

Configurable User I/O for Analog & Digital Controls

All SLx Series power supplies come standard with a 26-pin D-Sub connector designated as the External User I/O. This connector provides:

  • 8 Digital Outputs (5V logic)
  • 4 Digital Inputs (5V logic)
  • 4 Analog Outputs (0-10V logic)
  • 4 Analog Inputs (0-10V logic)

The External User I/O is isolated from the output terminals and referenced to earth ground. The connector’s pins are user configurable, allowing users to select the functions needed in their application, while providing future capability for new features. Use the digital outputs to integrate the power supply with, for example, external enable signals or digital fault monitoring logic, or monitor voltage-current using the analog 0-10V outputs. A dedicated high-speed analog input is also provided, sampled at 2 kHz for near real-time control.

Included MagnaCTRL Software

Magna-Power’s brand new MagnaCTRL Software comes standard with all SLx Series products, providing a modern, feature-rich, multi-product control platform. MagnaCTRL provides various Panels to allow for computer-based control, monitoring, sequencing, and firmware update capabilities.

Model Ordering Guide

For both ordering and production, SLx Series models are uniquely defined by several key characteristics, as defined by the following diagram:

SLx Series Ordering Guide

SLx Series Models

There are 171 different models in the SLx Series spanning power levels: 1.5 kW, 2.6 kW, 4 kW, 6 kW, 8 kW, 10 kW. To determine the appropriate model:

  1. Select the desired Max Voltage (Vdc) from the left-most column.
  2. Select the desired Max Current (Adc) from the same row that contains your desired Max Voltage.
  3. Construct your model number according to the model ordering guide.
  1.5 kW 2.6 kW 4 kW 6 kW 8 kW 10 kW    
Max Voltage (Vdc) Max Current (Adc) Ripple (mVrms) Efficiency
5 250 500 600 N/A N/A N/A

30

84%
10 150 250 400 600 N/A N/A 30 89%
16 93 162 250 375 500 600 40 89%
20 75 130 200 250 400 500 40 90%
25 60 104 160 240 320 400 50 91%
32 46 81 125 186 250 310 60 91%
40 37 65 100 150 200 250 80 91%
50 30 52 80 120 160 200 70 92%
60 25 43 66 100 133 166 100 93%
80 18 32 50 75 100 125 120 93%
100 15 26 40 60 80 100 120 93%
125 12 20 32 48 64 80 110 93%
160 9 16 25 36 50 60 110 93%
200 7.5 13 20 30 40 50 110 94%
250 6 10.4 16 24 32 40 110 94%
300 5 8.6 13.2 20 26.4 33.3 120 94%
375 4 6.9 10.4 16 21.3 26.5 120 94%
400 3.7 6.5 10 15 20 25 170 95%
500 3 5.2 8 12 16 20 250 95%
600 2.5 4.3 6.4 10 13.3 16.5 250 95%
800 1.8 3.2 5 7.5 10 12.5 250 95%
1000 1.5 2.6 4 6 8 10 400 95%
1250 1.2 2 3.2 4.8 6.4 8 700 95%
1500 1 1.7 2.6 4 5.3 6.6 1000 95%
2000 0.75 1.3 2 3 4 5 1000 95%
3000 0.5 0.86 1.3 2 2.6 3.3 1000 95%
4000 0.37 0.65 1 1.5 2 2.5 1000 95%
6000 0.25 0.43 0.66 1 1.33 1.66 1000 95%
8000 0.18 0.32 0.5 0.75 1 1.25 1000 95%
10000 0.15 0.26 0.4 0.6 0.8 1 1000 95%
###
Model part of Phase 2 SLx Series release

Specifications

The following specifications are subject to change without notice. Unless otherwise noted, all specifications measured at the product's maximum ratings.

AC Input Specifications
Specification Value
Input Voltages Available
Refer to models table for AC input voltage availability by power level. AC Input voltage specified at time of order and cannot be modified
UI, 100-240 Vac, 1-phase
UI2, 208-240 Vac, 1-phase
208 Vac, 3-phase
240 Vac, 3-phase
380/400 Vac, 3-phase
415 Vac, 3-phase
440 Vac, 3-phase
480 Vac 3-phase
Input Voltage Tolerance ± 10%
Input Voltage Frequency 50-400 Hz
Power Factor
Measured at max power
> 0.99, 1-phase UI and UI2 AC inputs
> 0.92, 3-phase AC inputs
Input Isolation
Measured line-to-ground
± 2000 Vdc
DC Output Specifications
Specification Value
Voltage Ripple Model specific. Refer to models table.
Line Regulation Voltage control: ± 0.04% of rated voltage
Current control: ± 0.03% of rated current
Power control: ± 0.05% of rated power
Load Regulation Voltage control: ± 0.02% of rated voltage
Current control: ± 0.06% of rated current
Power control: ± 0.08% of rated power
Stability
FWHM, measured at 25ºC over 8 hrs after 30 min warm-up
Voltage control: ± 0.005% of rated voltage
Current control: ± 0.075% of rated current
Temperature Coefficient Voltage control: 0.01%/ºC of rated voltage
Current control: 0.04%/ºC of rated current
Power control: 0.04%/ºC of rated power
Efficiency Up to 95%. Model specific. Refer to Models table.
Slew Rate, Voltage
Standard models, programmable
Minimum (Slowest): Rated voltage x 2-15 [V/ms]
Maximum (Fastest): Rated voltage x 0.006 [V/ms]
Slew Rate, Current
Standard models, programmable
Minimum (Slowest): Rated current x 2-15 [A/ms]
Maximum (Fastest): Rated current x 0.008 [A/ms]
Slew Rate, Power
Standard models, programmable
Minimum (Slowest): Rated power x 2-15 [W/ms]
Maximum (Fastest): Rated power x 0.004 [W/ms]
Output Isolation
Measured output-to-ground
± 2000 Vdc
Programming Specifications
Specification Value
Resolution, Digital Programming
Front panel or communication interfaces
16-bit, 0.00153% of rated voltage, current or power
Accuracy, Digital Programming
Output value to set point value, programmed via front panel or communication interfaces
Voltage: ± 0.06% of rated voltage
Current: ± 0.06% of rated current
Power: ± 0.10% of rated power
Accuracy, Digital Measurement
Output value to returned value, via front panel display or communication interfaces
Voltage: ± 0.08% of rated voltage
Current: ± 0.08% of rated current
Power: ± 0.10% of rated power
Resolution, Analog Programming
0-10 V analog input
12-bit, 0.025% of rated voltage, current or power
Accuracy, Analog Programming
Output value to set point value, programmed via analog input
Voltage: ± 0.12% of rated voltage
Current: ± 0.08% of rated current
Power: ± 0.10% of rated power
Accuracy, Analog Programming, High Speed Input
Output value to set point value, programmed via the high-speed analog input
Voltage: ± 0.80% of rated voltage
Current: ± 0.80% of rated current
Power: ± 1.20% of rated power
Accuracy, Analog Measurement
Output value to returned value, via analog output
Voltage: ± 0.08% of rated voltage
Current: ± 0.08% of rated current
Power: ± 0.10% of rated power
Analog I/O
3 configurable standard analog inputs, 1 configurable high-speed analog input, reference signal provided
High-Speed Input Sampling Rate: 2 kHz
Programming Voltage: 0-10 V
Monitoring Voltage: 0-10 V, 3 mA capacity
Monitoring Impedance: 0.005 Ω
Reference Voltage: 10 V, 20 mA capacity
Interface Specifications
Specification Value
Front Panel Programming Machined aluminum rotary knob with encoder, keypad, and up-down arrow for single bit control
Communication Interfaces
Standard
USB Host (Front): Type B
USB Host (Rear): Type B
RS485 (Rear): RJ-45
MagnaLINK™: RJ-25 x 2
External User I/O Port
Standard
26-pin D-sub DB-26, female
Referenced to ground; isolated from the DC output
See User Manual for pin layout
Communication Interfaces
Optional
CANopen (+CAN): DB-9
EtherCAT (+ECAT): RJ-45 x 2
EtherNet/IP (+EIP): RJ-45 x 2
LXI TCP/IP Ethernet (+LXI): RJ-45
ModbusTCP (+MTCP): RJ-45 x 2
PROFINET (+PROF): RJ-45 x 2
Physical Specifications
Specification Value
Size
All models
1U
1.75” H x 19” W x 24” D (4.4 x 48.3 x 61.0 cm)
Weight 1.5 kW models: 32 lbs (14.52 kg)
2.6 kW models: 34 lbs (15.42 kg)
4 kW models: 35 lbs (15.88 kg)
6 kW models: 35 lbs (15.88 kg)
8 kW models: 36 lbs (16.33 kg)
10 kW models: 36 lbs (16.33 kg)
Racking Standard EIA-310
Rear Support Rails Included
Environmental Specifications
Specification Value
Ambient Operating Temperature 0°C to 50°C
Storage Temperature -35°C to +85°C
Humidity Relative humidity up to 95% non-condensing
Air Flow Side air inlet, rear exhaust
Regulatory Specifications
Specification Value
EMC Complies with 2014/30/EU (EMC Directive)
CISPR 22 / EN 55022 Class A
Safety Complies with EN61010-1 and 2014/35/EU (Low Voltage Directive)
CE Mark Yes
RoHS Compliant Yes
REACH Compliant Yes

Dimensional Diagrams

The following are vectorized diagrams for the SLx Series. Refer to the Downloads section for downloadable drawings.

Dimensional Diagrams
DC Output Bus Bars without Included Cover
Two views shown, 3/8" mating hardware included (not shown)
AC Input • 1-phase, 8 AWG
For SLx Series models with 1-phase UI or UI2 input. Phoenix Contact 1720916, 2-wire + ground connector. Pheonix Contact 1777846 mating adapter included.
AC Input • 3-phase, 8 AWG
For SLx Series models with 3-phase input, except 10 kW models with 208/240 Vac input. Phoenix Contact 1720929, 3-wire + ground connector. Pheonix Contact 1777859 mating adapter included.
AC Input • 3-phase, 6 AWG
For 10 kW SLx Series models with 208/240 Vac 3-phase input. Phoenix Contact 1998881, 3-wire + ground connector. Pheonix Contact 1967472 mating adapter included.
Rear Mounting Rails
Included

Options and Accessories

The following are options and accessories developed specifically for Magna-Power's SLx Series

Accessories

External accessories and integration services are available for Magna-Power products

Downloads

The following downloads are for the SLx Series:

Documentation

SLx Series User Manual [EN] [HTML] [Recommended]
SLx Series Datasheet [20240122] [EN] [PDF]

Drawings

SLx Series, 1U, 2D [59329] [PDF]
SLx Series, 1U, 3D [59301] [STP]

Software

MagnaCTRL Software [0.001-52195] [MSI]