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DIGITAL POWER SUPPLY - OPEN FRAME (NON-PROGRAMMABLE DPS-OF)

INTRODUCTION

Magtorx's current regulated Digital Power Supply - Open Frame (DPS-OF) is a digitally controlled device designed for high performance and high accuracy.  The current regulation accuracy is better than 1% at full scale range.  Magtorx's toroidal transformer, has very low inductance leakage and excellent regulation, therefore, offering excellent efficiency. This model offers some limited programming capability an can be used for an extensive  range of OEM applications.  Magtorx's DPS can be  remotely controlled by the RS232 Port, 0 to 5 Vdc control signal or ten turns 5 kohms potentiometer - PN.5010014.  For display and other components see Product Accessories. For use with electromagnetic brakes and clutches refer to the manufacturer's Cross Reference List of the  Electromagnetic Particles,  Hysteresis and Friction Brakes and Clutches.

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Non-Programmable DPS-OF

The Open Frame (OF) Non-Programmable Current Regulated Digital Power Supply (DPS) is very useful for OEM use in process equipment such as tension control and for a wide range of life testing applications.

 
Notes:
1 The Absolute Max. Power is approx. 25% greater than the Rated Power.  This is to ensure that the power supply will continuously operate with its high accuracy at rated current even when inductive or resistive load increases up to 25%. This is useful for operations of  electromechanical brakes and clutches that require good current regulation for stable performance.
 
2  When connected to a low-voltage power line, the power supply may not produce rated dc output voltage.  Power supplies tend to overheat when subjected to a high voltage power line. 
 
3  Free Air Convection - The most important requirement for cooling a power supply is to provide proper air flow.  To prevent damage to the power supply, exercise caution with the operation temperature.
 
 
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SPECIFICATION

     Ratings:

P.S.
Model No.
Rated Voltage [Vdc]
Rated Current
[A]
Rated Power
[W]
Absolute Power1
[W]
Absolute Min. load
[Ohm]
06-ON-120
6 V
0-7.50 A
45 W
60 W
0.85
12-ON-120
12 V
0-3.90 A
47 W
60 W
3.0
24-ON-120
24 V
0-2.00 A
48 W
60 W
12.0
30-ON-120
30 V
0-1.60 A
48 W
60 W
18.5
48-ON-120
48 V
0-1.00 A
48 W
60 W
48.0
60-ON-120
60 V
0-0.75 A
45 W
60 W
80.0
90-ON-120
90 V
0-0.50 A
45 W
60 W
180.0

     Technical Data

Current output range
See table above
Current regulation

1 % of full scale range or better. (most models test results are between ½ and 1%)

Control input

RS-232; analog 0-5 Vdc; control knob (encoder).  The RS-232 interface allows complete control with a standard PC RS-232 serial port, eliminating the requirement for any additional PC I/O cards for communicating with the power supply. Note: In case RS232 serial port is not available use ATEN USB to Serial Bridge Adapter.

Cooling
Free Air Convection
Circuit overload protection
Equipped with electronic Short-Circuit and Overload Protection
Line fuse
0.8 amps slow acting fuse
Input ratings2
110 to 125 Vac/60 Hz                                                         
Toroid transformer
Low leakage inductance, excellent regulation, exceptional efficiency
Dimensions
7.00” W x 9.00” L x 2.70” H (178x229x69 mm)
Weight
3.2 lbs (1.45 kg)
Operation temperature3

Rated for a 0°C to 60°C temperature range - retains full performance.  De-rates maximum output power by 2.5% per degree C above 60ºC.

Storage (environmental): temperature/ humidity
 -20°C to 80°C@ max.; 90% RH not condensing

For use with electromagnetic brakes and clutches refer to manufacturers Cross Reference List of Electromagnetic Particles, Hysteresis and Friction Brakes and Clutches.

 

Current Scaling  Capability  

This feature is an electronic adjustment of the control signal to the desired current.

Example:  if the maximum brake current requirement is 600mA, the maximum Control Signal of 5Vdc can be scaled to 600mA.  In other words, if the DPS’ maximum current output is 1800mA, the Control Signal level for 600mA without scaling would be 1.667V.  After scaling, the maximum Control Signal of 5 Vdc is available for 600 mA.  The reason for this feature is to ensure that the highest possible resolution of the Control Signal can be assigned to the full scale of controlled current.

To perform Current Scaling manually, see below section DPS Connection and Dimensions, Pt. 5. (see also: table mode, manual mode and  PC Mode Operation)

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Current Scaling Capability

 DPS Connections and Dimensions

1.    External voltage control - connect 0 to 5 Vdc to terminal 4.

2.    Controlling current with potentiometer - connect 5k potentiometer to terminal 3 - GND & 4 Control (Wiper).  The 5 Vdc must be provided by the external source.  Terminal 11 can be used as a control voltage source.  However, voltage must be reduced to 5Vdc.  If the Display PN.0020503 is present, connect the potentiometer to the J2 connector located on the backside of the display.  If the Display PN.0020502 is present the potentiometer is not needed since the Display PN.0020502 is equipped with a digital encoder - see display specification for more information.

3.   Controlling with the RS232 Port- connect terminal 6 directly to ground, terminal 9 (RxDATA232) to TxRS232 on the PC side or Master Controller, and terminal 10 (TxDATA232) to RxRS232 on the PC side or Master Controller.

4.   Constant current operation - attach load to terminals 1 & 2, bridge terminals 4 & 5, then adjust trimmer R10 to the desired current.

5.   Current Scaling – attach load to terminal 1 & 2 then adjust trimmer R10 to the desired maximum current level. There is no manual reset to full scale without an appropriate resistive or inductive load. Note: The initial factory scaling is assigned based on the DPS rated current – see Product list for specifications.

6.   Display connections - connect Display - DPS terminals respectively as follows: 6-6, 7-7, 8-8, 9-9, 10-10, & 11-11.  See display specification for more information.

Note: The DPS Model ON-120 is a non-programmable device.  However, when used as a Slave in a Master-Slave application, the device will respond to the following commands: "#A[CR]", "LAXXXX]CR]", "PAXXXX[CR]" and "QAXXXX[CR]".  Since this power supply is a digital device, it has some limited memory. Therefore, it is capable of preserving the address "A" and values 'P" and "Q" - see commands: PC and Master-Slave for programming and point 3 above for RS232 communication.

DPS terminals describtion

Non-Programmable DPS mounting and overal dimensions

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