2.8. Options
2.8.1. Blocking Diode (+BD)
The integrated Blocking Diode (+BD) option provides an internally heat-sunk protection diode on the positive output terminal of a MagnaDC programmable DC power supply. This diode protects the product’s output from reverse voltage up to 1200 Vdc. All voltage sensing is performed after the protection diode—at the product’s output terminals—making the diode’s operation completely transparent to the performance of the power supply.
The +BD option is recommended for applications where there is significant back-emf or the possibility of a DC output voltage that could exceed the power supply’s output voltage rating, such as:
DC motor drives
Battery and capacitor charging
Large electromagnets
In these applications, the integrated blocking diode can be used to prevent back-emf from the energy stored in the load into the power supply’s output. Furthermore, the integrated blocking diode will prevent the power supply’s internal bleed resistance from discharging the energy stored in the load when the power supply is off or in standby.
Availability
The +BD option is available for models with maximum output voltage rating as specified for the following product series:
TS Series, models rated from 40 Vdc to 1000 Vdc
MT Series, models rated from 125 Vdc to 1000 Vdc
ML Series, models rated from 250 Vdc to 1000 Vdc
Note
The +BD option cannot be combined with the +ISO option.
Reverse Voltage Rating |
1200 Vdc |
Additional Losses |
Up to 1.4% |
2.8.2. High Isolation Output (+ISO)
Certain applications require floating the output voltage to values beyond the power supply isolation rating. Magna-Power’s High Isolation Output Option (+ISO) enables any TS/MT/ML Series model with a peak output voltage rating of 250 Vdc through 1000 Vdc to be rated for a higher voltage output isolation. Improved isolation is achieved by a novel output stage with improved controller isolation. In addition to being able to float the power supply to a higher output voltage, this option also enables lower voltage units to be tied together in series up to its new higher isolation rating, in accordance with the table below.
Availability
The +ISO option is available for models with maximum output voltage rating as specified for the following product series:
TS Series, models rated from 250 Vdc to 1000 Vdc
MT Series, models rated from 250 Vdc to 1000 Vdc
ML Series, models rated from 250 Vdc to 1000 Vdc
Note
The +ISO option cannot be combined with the +BD or +WC options.
Note
Addition of the +ISO option will cause the product’s wired remote sense feature to be removed.
2.8.3. High Slew Rate Output (+HS)
The High Slew Rate Output (+HS) solves several limitations inherent in switching power supply design. Rapid voltage transitions require internal electronics to supply the energy to charge and discharge output capacitors. Peak currents internal to the power supply define slew rate; utilizing less capacitance enables voltage transitions in shorter time periods. Additionally, less capacitance reduces requirements for discharge demands during open circuit conditions.
The standard output stage Magna-Power Electronics power supplies has been designed to provide the lowest possible output ripple voltage within the constraints of available components, size, and cost. Part of the output stage consists of a bank of aluminum electrolytic capacitors which has the desired electrical properties to provide this function. These components require bleed resistors to discharge any voltage when the power supply has no load and is disabled. While the presence of these components and the resulting performance are normally industry accepted, there are applications where lower output capacitance and lower loss bleed resistors are extremely desirable and higher ripple voltage is acceptable. To meet this need, a high-slew rate option is available which has an output stage consisting of low capacitance film and aluminum electrolytic capacitors and lower loss bleed resistors. Applications for the high-slew rate option include battery charging, photovoltaic emulation, power waveform generation, and medium speed power pulsing. These applications all benefit from higher bandwidth and in many cases, can tolerate increased ripple voltage.
Key Applications
For battery charger applications, output capacitance and internal bleed resistors present themselves as a load to the connecting batteries. One common practice is to use a series diode to block reverse current flow with the sacrifice of increased cost and lower efficiency. The high slew rate option, with its lower output capacitance and lower loss bleed resistors, enables direct connection to batteries without series blocking diodes.
For photovoltaic emulation applications, higher bandwidth and lower output capacitance enable improved performance with higher speed, maximum power tracker algorithms. Maximum power tracker circuitry deviates the operating point of photovoltaic arrays to determine maximum power output. Slow responding emulation sources can present a problem when the speed of the algorithm exceeds that of the source. Furthermore, with lower output capacitance, changes in the operating point and transients, caused by shorting the solar inverter input, produce lower unwanted input currents.
The high-slew rate option enables the power supply to operate as a low frequency, power pulse generator. With the special capacitors selected for this option, it is possible to superimpose waveforms or produce a medium speed pulse on top of the dc output and expect normal capacitor life. It is important to note that the power supply output is single quadrant; that is, the output voltage or current cannot reverse.
Availability
The +HS option is available for the following product series:
SL Series
XR Series
TS Series
MT Series
ML Series
Note
XR Series models rated above 3000 Vdc already include a high slew rate output stage and no additional +HS option is available for these models.
Max Voltage Rating |
Output Capacitance
SL Series (µF)
|
Output Capacitance
XR Series (µF)
|
Output Capacitance
TS Series (µF) [1]
|
Ripple (Vrms) |
|---|---|---|---|---|
5 |
4235 |
13200 |
13200 |
0.5 |
8 |
N/A |
N/A |
9000 |
0.5 |
10 |
1740 |
4080 |
9000 |
0.5 |
16 |
1740 |
4080 |
4080 |
0.5 |
20 |
775 |
2340 |
2340 |
0.7 |
25 |
775 |
1170 |
2340 |
0.7 |
32 |
775 |
1170 |
1170 |
1.4 |
40 |
760 |
240 |
1170 |
1.5 |
50 |
760 |
240 |
1170 |
1.5 |
60 |
760 |
240 |
300 |
1.5 |
80 |
110 |
240 |
300 |
1.5 |
100 |
110 |
160 |
200 |
1.6 |
125 |
70 |
160 |
200 |
1.6 |
160 |
70 |
160 |
200 |
1.6 |
200 |
70 |
160 |
200 |
1.6 |
250 |
70 |
160 |
200 |
1.6 |
300 |
70 |
160 |
200 |
1.8 |
375 |
70 |
160 |
200 |
1.8 |
400 |
70 |
160 |
200 |
1.8 |
500 |
40 |
56 |
200 |
2.1 |
600 |
40 |
56 |
120 |
2.3 |
800 |
30 |
52 |
70 |
2.5 |
1000 |
30 |
52 |
60 |
3.0 |
1250 |
N/A |
18 |
18 |
3.5 |
1500 |
N/A |
18 |
18 |
3.5 |
2000 |
N/A |
18 |
18 |
3.5 |
3000 |
N/A |
N/A |
9 |
4.0 |
4000 |
N/A |
N/A |
9 |
4.0 |
6000-10000 |
N/A |
N/A |
N/A |
N/A |
2.8.4. IEEE-488 GPIB (+GPIB)
The IEEE-488 GPIB (+GPIB) option, sometimes called the General Purpose Interface Bus (GPIB), is a general purpose digital interface system that can be used to transfer data between two or more devices. It is particularly well-suited for interconnecting computers and instruments. Some of its key features are:
Up to 15 devices may be connected to one bus
Total bus length may be up to 20 m and the distance between devices may be up to 2 m
Communication is digital and messages are sent one byte (8 bits) at a time
Message transactions are hardware handshaked
Data rates may be up to 1 Mbyte/sec
The IEEE-488 GPIB interface in integrated with the power supply’s rear communication ports. The IEEE 488 interface offers full compatibility with Magna-Power provided drivers, software and SCPI command set.
Availability
The +GPIB option is available for the following product series:
SL Series
XR Series
TS Series
MT Series
ML Series
2.8.5. LXI TCP/IP Ethernet (+LXI)
Certified to the LXI Standard (Class C), version 1.4, the LXI TCP/IP Etherent (+LXI) allows the product to be fully controlled over an integrated TCP/IP Ethernet interface. LXI is an instrumentation platform based on industry standard Ethernet technology designed to provide modularity, flexibility, and performance to small- and medium-sized systems. All of the product’s standard SCPI commands are supported over the +LXI option, along with all provided software and drivers.
LXI’s advantages are exemplified in its compact, flexible package providing high-speed I/O and reliable measurements. The Magna-Power Electronics LXI TCP/IP Ethernet option includes an embedded web-server, allowing web browser power supply control and monitoring from virtually anywhere.
Availability
The +LXI option is available for the following product series:
SL Series
XR Series
TS Series
MT Series
ML Series
2.8.6. Ruggedized (+RUG)
The Ruggedized Option (+RUG) provides additional mechanical security for large power components and sub-assemblies within SL Series and XR Series products.
SL Series and XR Series units with the Ruggedized Option have been independently tested to comply with the following MIL-STD-810G shock and vibration specifications:
MIL-STD-810G CHG1 Method 516.7 Functional Shock, Procedure I; which subjects the product to 40G, 11 ms terminal saw tooth pulse; three shocks in each direction along three mutually perpendicular axes
MIL-STD-810G CHG1 Method 514.7 Vibration; which subjects the product to two hours of vibration per axis along three mutually perpendicular axes
All products with the Ruggedized Option maintain ambient operating temperatures from 0°C to 50°C and ambient storage temperatures from -25°C to +85°C.
Availability
The +RUG option is available for the following product series:
SL Series
XR Series
2.8.7. Water Cooling (+WC)
The Water Cooling (+WC) option is available for Magna-Power power supplies for use in densely packaged system cabinets, where heat removal by the product’s standard air cooling presents a challenge. Water cooling is accomplished with chill plates and an integrated central heat exchanger. The chill plates provides a thermal conduction path for heat sensitive components and the central heat exchanger removes heat from air internal to the enclosure. An internal solenoid valve enables water flow when the chill plate reaches 60°C. Operation of the solenoid prevents internal condensation.
Each 3U and 4U module has a 1/4” NPT male inlet and outlet for water flow. For 6U and 8U, external plumbing interconnects power supply modules, providing a single 1/2” NPT male inlet and outlet. A minimum of 2.50” is recommended behind the enclosure for this hardware and user connections. For systems requiring more than one power supply, plumbing connections must be paralleled; that is, water should not flow from one power supply into another.
When water cooled power supplies are ordered in combination with the Cabinet and Integration accessory, Magna-Power will parallel the water inlet connections and parallel the water outlet connections, providing a single inlet and outlet for the rack.
Availability
The +WC option is available for models with maximum output voltage rating as specified for the following product series:
TS Series, models rated from 1000 Vdc and below
Note
The +WC option cannot be combined with the +ISO option.
For detailed specifications on the +WC, including flow rate and pressure, please refer to the individual product specifications.
2.9. Accessories
2.9.1. Cabinet and Integration
Cabinet and integration services are offered for the rack-mount programmable DC power supply products. Cabinets are supplied with fans rated to installed products. Key features of the cabinet and integration option are as follows:
Internally fabricated, heavy duty welded cabinet frames
Casters installed, including (2) locking casters
Special circuitry for product integration with cabinet fans
Installation and testing as a complete system
2.9.2. DC Power Cables
Utilizing Magna-Power’s internal cable manufacturing operations, custom-made DC power cables are offered as an accessory. The following table identifies the various cables and voltage ratings that are offered:
Use the following cable configuration guide and the table above to define the appropriate cable for your application and product:
CBL-[Feet]-[Cable Gauge]-[Voltage Rating]-[Termination 1]-[Termination 2]
For example: CBL-10-4/0-600-3/8-3/8; 10-feet, 4/0 cable rated for 600 Vdc terminated with 3/8” lugs on both ends.
Refer to the product diagrams for the respective product series for the DC output bus thread size and number of connection points.
2.9.3. Universal Interface Device (UID47)
Magna-Power Electronics UID47 is a general purpose device for connection to Magna-Power Electronics’ power supplies. The device contains the necessary circuitry for configuring power supplies for master/slave parallel or series operation.
Master/slave parallel operation allows two or more power supplies to equally share output current when connected together. Master/slave series operation allows two or more power supplies to equally share output voltage when connected together. In either operation mode, the master unit will command the slave units to the proper voltage and current. Each unit will display its own individual voltage and current. Installation requires setting jumpers, placing included 37-conductor cables between the UID47 and power supplies, and wiring the power supply outputs in either parallel or series.
The UID47 can be used as an interface for connecting control and monitoring lines to external circuitry. It also contains an area on the printed circuit board for interconnecting wires and placing components for specific user applications.
Key features of the UID47 option are as follows:
Compatible with all Magna-Power Electronics power supplies
Interface for series and parallel master/slave operation
User configurable screw terminal connector
Pad area for custom circuitry
Qty (2) 6-foot 37-pin shielded cables included
For more detailed information about the UID47, refer to its User Manual.
2.9.4. RS485 (Converter)
The industrial RS232 to Addressable RS485 Converter allows non-addressable, “dumb” RS-232 devices to be connected on an addressable RS-485 network. The master node controls all communications to connected devices. By distributing the switching intelligence along the RS-485 network, wiring cost savings are substantial compared to a single switched “star” configuration.
Devices can either be polled by the master node or request access to the bus through a RS-232 handshake line. This provides a versatile system for interconnecting devices that are designed for point to point communications. Because the units communicate using standard RS-485 signals, RS-232 devices can form their own network or be added to an existing system. Up to 32 nodes at up to 4000 feet can be on one bus without a repeater, and the 485DSS’s addressing scheme allows up to 256 units on a single network with repeaters.
2.9.5. USB (Converter)
The industrial RS232 to USB Converter offers instant I/O expansion for peripheral device connectivity. An out-of-the-box (external) alternative to PCI cards, Edgeport makes it easy to add serial port to a PC, server or thin client in minutes without opening the chassis, reconfiguring or rebooting the system.
The USB Converter device plugs directly into the back of the power supply, creating a seamless USB interface. Feature-rich design, reliability and unmatched operating system support make Edgeport USB-to-serial converters ideal for mission-critical enterprise applications. USB cable included along with associated drivers on the Magna-Power Electronics USB stick.