MagnaLOAD - Model ALx Series -DC Electronic Loads
The ALx Series MagnaLOAD utilizes conventional linear MOSFET-based dissipative elements, allowing the series to achieve a very wide voltage-current operating range within the model’s maximum power rating. Using the same heat management innovations developed for Magna-Power’s high density programmable DC power supplies, the ALx Series’ conservative cooling ensures long product life with continuous full power operation in environments up to 50°C ambient operating temperature.
Magna-Power’s MagnaLINK™ technology provides distributed Texas Instrument DSP control across power processing stages inside the MagnaLOAD DC electronic load. This technology follows a significant internal development cycle from Magna-Power to provide a unified digital control platform across its electronic loads and power supplies, featuring fully digital control loops, adjustable control gains, programmable slew rates, digital master-slaving, and many new advanced control technologies.
All ARx Series MagnaLOADs come with the following interfaces:
- Front panel knob, keypad, and menu system
- 25-pin configurable external user I/O, including a high-speed analog input
- Front and rear USB and rear RS-485 or optional Ethernet and IEEE-4888 GPIB
When in standby or diagnostic fault, the DC input bus is disconnected via a switching device.
Finally, with a dedicated +5V interlock input pin and included +5V reference on all models, external emergency stop systems can be easily integrated using an external contact.
To accommodate a variety of DC sources, all ARx Series MagnaLOADs come with many configurable control modes, including:
- Voltage Mode
- Current Mode
- Power Mode
- Resistance Mode
- Shunt Regulator Mode
Preference for DC regulation is given to the parameter in the selected mode within the programmed set-points. Using the MagnaLOAD`s set-points and trip settings, the product can configured to either trip with a fault when a limit is exceeded or to cross-over into a different regulation state.
Shunt Regulator Mode turns the MagnaLOAD into a high-speed smart braking resistor, engaging the DC input only when a specified voltage and exceeded by a user-defined percentage, while limiting the shunt current to a programmed set-point.
All MagnaLOADs come standard with a MagnaLINK™ Input and a MagnaLINK™ Output port, which provides plug and play digital master-slaving. Simply connect the master`s MagnaLINK™ Output to the slave`s MagnaLINK™ Input and, using the MagnaWEB software, the products will automatically configure themselves for master-slave operation as a higher-power unit based on the populated ports. Buffered digital MagnaLINK™ connections means many MagnaLOADs can be daisy-chained in master-slave operation. Master-slave MagnaLOAD units will aggregate measurements to one display panel.
The internal MagnaLINK™ protocol was developed with expandability at the forefront. When configured for master-slave operation, the master controller takes control of all the slave`s digital "targets." With this digital master-slaving strategy, it is completely transparent whether the unit is operating as a stand-alone product or in master-slave.
Beyond the front panel and computer controls, all MagnaLOADs come standard with a 25-pin D-Sub connector designated as the External User I/O. This connector provides:
- 8 Digital Outputs
- 4 Digital Inputs
- 4 Analog Outputs
- 4 Analog Inputs
All the analog-digital I/O ports are configurable, allowing the user to select which parameters they want to control and monitor. This configurable I/O scheme reduces complexity, eases PLC integrationand allows control parameters from various interfaces simultaneously.
The MagnaLOAD`s configurable analog inputs provide 0-10V programming from PLCs and external D/A converters.
Magna-Power`s next generation software interface, MagnaWEB, provides intuitive and user-friendly web-browser based controls for programming and measurement read-back of the MagnaLOAD`s activity. Virtually all of the MagnaLOAD`s available functions can be controlled and monitored from the MagnaWEB software over any of product`s installed communication interfaces.
MagnaWEB uses a server-client software model to provide access to the MagnaLOAD from nearly any device and operating system. Install and run the MagnaWEB software locally on Windows then, using a web browser, access the server connected to the MagnaLOAD from a variety of devices including other desktops, tablets or smart-phones.
The following specifications are subject to change without notice. Unless otherwise noted, all specifications measured at the product`s maximum ratings.
AC Input Specifications
SpecificationValue
AC Input Voltage
1Φ, 2-wire + ground: 85 to 265 Vac (UI: Universal Input); Available on 1.25 and 2.5 kW Models
120 Vac (120SP: operating range 108 to 132 Vac); Available on 5 kW to 17.5 kW Models
208 Vac (208SP: operating range 187 to 229 Vac); Available on 5 kW to 20 kW Models
240 Vac (240SP: operating range 216 to 264 Vac); Available on 5 kW to 20 kW Models
AC Input Frequency: 50-60 Hz
AC Input Isolation: ±1500 Vac, maximum input voltage to ground
Programming Interface Specifications
SpecificationValue
Front Panel Programming: Aluminum rotary knob with encoder, keypad, or up-down arrow for single bit control
Computer Interfaces
Standard: USB Host (Front): Type B
USB Host (Rear): Type B
RS485 (Rear): RJ-45
MagnaLINK™: RJ-25 x 2
Computer Interfaces: LXI TCP/IP Ethernet (Rear): RJ-45
GPIB (Rear): IEEE-488
External User I/O Port
Analog and Digital Programming: 25-pin D-sub DB-25, female
Referenced to Earth ground; isolated from the DC input
See User Manual for pin layout
Programming Specifications
SpecificationValue
Resolution
All Modes: 16-bit, 0.0015%
Accuracy
Programming and Measurement: Voltage: ±0.1% of full scale voltage rating
Current: ±0.2% of full scale current rating
Power: ±0.3% of full scale power rating
Resistance: ±0.3% of full scale resistance rating
Rise/Fall Time
Maximum: Voltage Mode: 100 ms, 10% to 90% full scale voltage rating
Current Mode: 2 ms, 10% to 90% full scale current rating
Power Mode: 100 ms, 10% to 90% full scale power rating
Resistance Mode: 40 ms, 10% to 90% full scale resistance rating
Trip Settings Range: Over Voltage: 10% to 110% of full scale voltage rating
Under Voltage: 0% to 110% of full scale voltage rating
Over Current: 10% to 110% of full scale current rating
Over Power: 10% to 110% of full scale power rating
External User I/O Specifications
SpecificationValue
Digital I/O: Digital Input Voltage: 5V
Digital Input Impedance: 10 kΩ
Digital Monitoring Voltage: 5V, 32 mA capacity
Digital Reference Voltage: 5V, 20 mA capacity
Analog I/O: Analog Sampling Rate: 2 kHz
Analog Programming Voltage: 0-10 V
Analog Programming Resolution: 12-bit, 0.025%
Analog Monitoring Voltage: 0-10 V, 3 mA capacity
Analog Monitoring Impedance: 0.005 Ω
Analog Monitoring Accuracy: 0.05% of full scale
Analog Reference Voltage: 10 V, 20 mA capacity
Physical Specifications
SpecificationValue
Racking Standard
1.25 kW and 2.5 kW Models Only: EIA-310
Rear Support Rails
6.75 kW Models Only: Included
Size and Weight
1.25 kW Models: 3U
5.25” H x 19” W x 24” D (13.34 x 48.26 x 60.96 cm)
40 lbs (18.1 kg)
Size and Weight
2.5 kW Models: 3U
5.25” H x 19” W x 24” D (13.34 x 48.26 x 60.96 cm)
65 lbs (29.5 kg)
Size and Weight
5 kW Models: 12U Cabinet
30.7” H x 24” W x 31.5” D (78.0 x 61.0 x 80.0 cm)
255 lbs (115.7 kg)
Size and Weight
7.5 kW Models: 12U Cabinet
30.7” H x 24” W x 31.5” D (78.0 x 61.0 x 80.0 cm)
320 lbs (145.2 kg)
Size and Weight
10 kW Models: 12U Cabinet
30.7” H x 24” W x 31.5” D (78.0 x 61.0 x 80.0 cm)
385 lbs (174.6 kg)
Size and Weight
12.5 kW Models: 24U Cabinet
58.25” H x 24” W x 31.5” D (148.0 x 61.0 x 80.0 cm)
500 lbs (226.8 kg)
Size and Weight
15 kW Models: 24U Cabinet
58.25” H x 24” W x 31.5” D (148.0 x 61.0 x 80.0 cm)
565 lbs (256.3 kg)
Size and Weight
17.5 kW Models: 24U Cabinet
58.25” H x 24” W x 31.5” D (148.0 x 61.0 x 80.0 cm)
630 lbs (285.8 kg)
Size and Weight
20 kW Models: 24U Cabinet
58.25” H x 24” W x 31.5” D (148.0 x 61.0 x 80.0 cm)
695 lbs (315.3 kg)
Environmental Specifications
SpecificationValue
Ambient Operating Temperature: 0°C to 50°C
Storage Temperature: -25°C to +85°C
Humidity: Relative humidity up to 95% non-condensing
Air Flow: Front air inlet, rear exhaust
Regulatory Specifications
SpecificationValue
EMC: Complies with 2014/30/EU (EMC Directive)
CISPR 22 / EN 55022 Class A
Safety: NRTL Listed, Intertek Control Number 5014353
Conforms to UL61010-1:2012 Ed.3+R:29Apr2016
Certified to CSA C22.2#61010-1-12:2012 Ed.3
Complies with EN61010-1 and 2014/35/EU (Low Voltage Directive)
CE Mark: Yes
RoHS Compliant: Yes