EXTECH DCP36 80W Switching DC Power Supply User Manual

: June 6, 2024
: EXTECH

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EXTECH DCP36 80W Switching DC Power Supply User Manual
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EXTECH DCP36 80W Switching DC Power Supply User Manual

EXTECH DCP36

User Manual Translations available at www.extech.com

Introduction

Thank you for selecting the Extech DCP36 laboratory grade 80W Switching DC Power Supply. The DCP36 is auto-ranging and offers a 0.5~36V and 0~5A output capability. Its maximum current output at 36V is 2.2A (80W/36V). The maximum voltage output at 5A is 16V (80W/5A).

The voltage/current spectrum is greater than three conventional power supplies of the same power rating. Adjustable Upper Voltage/Current Limit features protect sensitive devices from wide output variations. Three user presets allow for easy programming and recall of commonly used output configurations. Master/Slave capability for up to 30 units in parallel connection. The DCP36 is perfect for benchwork, field service, and hobbyists.

The DCP36 is shipped with the following accessories: AC power cord, RJ11 cable, alligator clip test leads, and an RJ11 terminator plug.

This power supply is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit the Extech website for the latest user manual and for customer support.

Safety

This manual contains important information illustrating the safe and proper use of this power supply. Read the entire manual and carefully observe the markings and labels on this unit and on the equipment to which it will be connected.

Failure to observe Warnings may cause injury to persons and damage to the power supply or the connected equipment. Failure to observe Caution statements may result in damage to connected equipment and improper functioning of the power supply.

WARNINGS

Do not use this power supply near water.
Do not operate or touch this power supply with wet hands.
Do not open the casing of the power supply when it is connected to AC mains.
Refer all servicing, including fuse replacement, to qualified service personnel.

CAUTIONS

Use a grounded 3-terminal AC source.
This unit is intended for indoor use only.
Do not operate or place this unit in a humid or dusty environment.
Do not expose this device to direct sunlight or place it near a source of heat.
Before plugging into the local AC mains, check the rating label at the back of the unit.
Do not block any of the ventilation openings on the unit.
This unit must be used within the specified ratings; Continuous and excessive loading may cause damage to the power supply.
The gauge size of input power cable must be at least 0.75mm2 (18awg) and the total length of power cable must not exceed 3m (10ft).

Power Supply Description

Front and Back Descriptions

Output Voltage Display
Output Current or Power Display
SLAVE-SHIFT-LOCK function indicators
Output ON-OFF button and indicator
Output preset selection buttons and indicators
LOCK and Amp/Watt-meter button
MENU and SHIFT button
Power ON-OFF switch
Output terminal (negative)
Output terminal (positive)
Current output adjustment
Voltage output adjustment
Constant Current indicator
Constant Voltage indicator
Remote Sensing (RS) terminals
Alternate output (O/P) terminals
Master RJ11 jack
Slave RJ11 jack
Earth Ground terminal
AC power jack

Note that there is an additional RJ11 jack on the back of the unit labeled ‘Reserved’ that is unused in this model

Display Descriptions

Constant Voltage mode (C.V. indicator)
The output voltage is kept constant at the set voltage. The DCP36 remains in CV mode if the load current is lower than the set current limit, otherwise it will switch to CC mode.

Constant Current mode (C.C. indicator)
When the load is higher than the set current limit of the set voltage in CV mode, the Constant Current mode is active. The output current is kept constant at the set current level provided that the loading is sufficiently large to draw current equal to or larger than the set current, otherwise it will switch to the CV mode.

Watt-meter (W indicator)
Lower 4-digit LED row is active as a watt-meter. The value is showing output power in Watts.

Amp-meter (A indicator)
Lower 4-digit LED row is active as an amp-meter. The value is showing output in Amperes.

SLAVE indicator (green)
The DCP36 is in the slave mode and controlled by a master unit. The voltage and current setting of slave units are controlled by the master unit. The buttons and knobs of slave units are locked.

SHIFT indicator (yellow)
Indicates that the SHIFT key is pressed and that the secondary function of a button or knob will be activated. Short press SHIFT to activate the setting mode for UVL, UCL, or A/W functions.

LOCK indicator (red)
Indicates that the power supply panel is locked.

Output indicator (next to Output button)
Indicates output power ON / OFF status.

Preset A, B, C indicators
Indicates that output preset A, B, or C is selected and that the output voltage and current corresponds to the pre-programmed preset A, B, or C settings.

Button Descriptions

Note: The secondary functions for buttons/knobs can only be activated by first pressing SHIFT so that the SHIFT LED is lit. Secondary functions cannot be selected if the SHIFT LED is not lit.

Voltage adjust knob: Turn clockwise or counterclockwise to increase/decrease the voltage output. Press knob to adjust individual digits, selected digit will be highlighted.

Current adjust knob: Turn clockwise or counterclockwise to increase/decrease the current output. Press knob to adjust individual digits, selected digit will be highlighted.

Output button: Press to switch the DCP36 output ON (the corresponding LED will be lit). Press to switch OFF the power supply output (LED will switch OFF).

Preset A, B, C buttons: Press to choose a pre-programmed current/voltage output configuration. The corresponding LED will switch ON.

LOCK A/W button: Short press to Lock/Unlock the front panel. When SHIFT is pressed first, this button toggles the Ampere (A) meter / Watt (W) meter on the lower 4-digit LED readout.

Menu / Shift button: Long press to access the programming menu. Short press to access secondary functions for the Lock A/W button (amp or watt- meter), UVL setting (upper voltage limit), and UCL setting (upper current limit). For UVL/UCL adjustments use the Voltage/Current knobs.

Power Supply Address ID (for use with Master/Slave setup)

Long press MENU to enter the settings menu
Turn the Voltage knob until you see ‘Add’ ‘SEt’ (address setting)
Press the Voltage knob to enter the address menu
Turn the Current knob to change the address ID (0~30). The Master unit must be set = 0. Each Slave unit must have a unique ID (1 ~30).
Press the Voltage knob to confirm
Press MENU to exit

Factory Default Reset

Long press MENU to enter the settings menu
Turn the Voltage knob until you see ‘FACS’ ‘SEt’ (factory setting)
Press the Voltage knob to enter the address menu
Turn the Current knob to select no or yes
Press the Voltage knob to confirm selection
Press MENU to exit

Upper Voltage/Current (UVL/UCL) Limits

The Upper Voltage (UVL) and Current (UCL) Limits are added protection for sensitive loads. When the output exceeds the UVL or UCL setting, the output signals will automatically switch OFF and the alert icon ‘ Uul ’ or ‘ UCl ’ will appear. The second function of the Voltage and Current Knobs are for UVL and UCL adjustment.

Press SHIFT and the SHIFT LED will switch ON.
Press the Voltage or Current knob. The display will show ‘ SUul ’ or ‘ SUCl ’ and the UVL or UCL value on the 4-digit LEDs.
Turn the Voltage or Current knob to adjust the UVL or UCL value. Press the Voltage or Current knob to select a digit for editing.
Press SHIFT to confirm the setting and to exit the mode. If the new value is lower than the output setting, the DCP36 will display an error ( Erro ). In this case, reduce the output setting to a value lower than the UVL or UCL value.

Stand-Alone Operation

With no load attached to either the front or rear output terminals, plug the power supply into an AC power source.
Use the POWER button to switch the power supply ON.
The firmware version will briefly appear and then the 4-digit LEDs will read zero.
When connected to a load, the Voltage and Current knobs can be turned clockwise or counterclockwise to increase or decrease the output levels for the selected preset A, B, or C (see next section). View the adjustments on the 4-digit LED readouts. You can also short press the Voltage or Current knob to select individual digits to adjust; the selected digit will appear bold. Rotate the knob to set the digit and then press the knob to select another digit.
Use the OUTPUT button to turn the output OFF.
Note: The front and rear output terminals are connected internally.

Output Presets ( A, B, and C )

The DCP36 offers three Voltage/Current output preset configurations (A, B, and C) for quick recall. Select a preset by pressing the A, B, or C button, the corresponding preset LED will light. To adjust a preset configuration, first press the A, B, or C button and then use the Voltage and Current knobs to set the desired output levels. The new settings will be saved automatically. The values can be reset to factory default in program menu. Note that the output will automatically switch OFF when another preset is selected in order to prevent damage to a connected load if a preset output is set too high.

Front Panel Lock-out

To lock the front panel controls, short press the LOCK button. The LOCK LED indicator is lit when the front panel is locked. To unlock the front panel, press the LOCK button again, the LOCK LED will switch OFF. When the front panel is locked only the LOCK button is functional.

Watt-meter / Amp-meter selection

The lower 4-digit LED readout is used to display current (Amperes) or Power (Watts). To switch between the two types:

Press SHIFT ; the SHIFT LED will switch ON
Press the A/W button to switch to Watt-meter
Press SHIFT ; the SHIFT LED will switch ON
Press A/W to revert to the Amp-meter mode

Remote Sensing

When the output current is high or the load connection cable is very long, a voltage drop develops across the connecting cables. This results in a difference between the voltage at the output terminals and at the load point. By connecting the Remote Sense terminals to the load point, the voltage reading at the output display and the voltage at the load point will be the same.

Caution: Observe correct polarity and never short the Remote Sensing terminals.

Connect the power supply output terminals to the Load (use the front or rear O/P terminals)
Connect the Remote Sensing terminals to the Load (push in on the orange tabs on the terminal block to open the wire clamp inside the connector)
Connect RS+ to the Positive (+) connection at the Load
Connect RS- to the Negative (-) connection at the Load

Note: Always disconnect the Remote Sense terminal connections before disconnecting the Load connections.

Master/Slave Operation

Two or more units (up to 30) can be connected in parallel to increase output current to the sum of the connected supplies. In this mode of operation, the Master power supply will control all the voltage and current settings of the Slave units.

Note: Please follow these steps carefully and in the correct order. Failure to do so can result in a lockout condition. If this occurs, please power off all units, disconnect the wiring, and begin again.

Set all the power supplies to the same upper voltage limit (UVL) and voltage/current range.
Set the voltage and current output of all the slaves to maximum values.
Switch off all the power supplies.
Connect the back of the power supplies as shown in the diagram below. Note: For proper operation all connecting cables and output cables should be of the same gauge and length. Be sure to connect a terminator to the last Slave unit’s Master jack.
Using either the output terminals on the front or back, connect the output cables in parallel to the load as shown in diagram below.
Program the Master unit’s Address ID to ‘0’ (factory default) and set each Slave to a unique ID between 1 and 30. See the Programming Menu section for details.
Switch ON the Master first and set the desired output, then switch ON the Slave units. Each Slave unit’s LED indicator should be lit if the wiring is configured correctly.
All output voltages and currents are now controlled by the Master unit.

Specifications

Input Power| 100 ~ 240VAC (50 to 60Hz), 1.2A
US (NEMA 5-15P to IEC-C13) power cable supplied
Optional EU or UK cables available
---|---
Supply voltage fluctuation| ± 10% of stated operating voltage
Efficiency| ≥ 78%
Power Factor| > 0.9
No load input current at 230V| ≤ 150mA
Full load input current at 230V| ≤ 500mA
Output voltage accuracy| ± (1.0% reading + 15 digits)
Output current accuracy| ± (1.0% reading + 15 digits)
Voltage Output, DC| Auto ranging 36V max. (maximum voltage output at 5A is 16V)
Current Output, DC| 5A max. (maximum current output at 36V is 2.2A)
Constant voltage and current ranges| 0.5 ~ 36V / 5A (auto range with 80W max. power)
Constant Voltage characteristics:|
Adjustment resolution| 10mV (minimum value: 0.5V)
Ripple and Noise| ≤ 35mVp-p
Line Regulation (±10%)| ≤ 4mV
Load Regulation (10~90%)| ≤ 30mV
Constant Current characteristics:|
Adjustment resolution| 1mA (minimum value: 30mA)
Line Regulation (±10%)| ≤ 10mA
Load Regulation (10~90%)| ≤ 10mA
Metering accuracy:|
Display| Dual 4-digit LED
Voltage meter accuracy| ± (0.5% reading + 5 digits)
Current/watt meter accuracy| ± (0.5% reading + 5 digits)
User adjustable upper voltage/current limits| Yes
Remote Sensing| Yes
Protection| Over-voltage protection, Current Limiting protection, Short Circuit, Overload, Over-temperature, Upper voltage limit, Upper Current Limit
Operating %RH| 10 to 80% RH
Altitude| 6562 ft. (2000m)
Pollution degree| 2
Installation Category| CAT II
Master/Slave control| YES (30 units max.)
Cooling method| Convection
Dimensions| 13 x 5 x 2″ (330 x 127 x 53.5mm) Depth x Height x Width
Weight| 4.2lbs. (1.9 kg)

Specifications subject to change and based on an operating temperature of 77oF (25oC) and Pressure 0.1Mpa

Troubleshooting

Two-year Warranty

FLIR Systems, Inc. warrants this Extech brand instrument to be free of defects in parts and workmanship for two years from date of shipment (a six- month limited warranty applies to sensors and cables). To view the full warranty text please visit: http://www.extech.com/support/warranties.

Calibration and Repair Services

FLIR Systems, Inc. offers calibration and repair services for the Extech brand products we sell. We offer NIST traceable calibration for most of our products. Contact us for information on calibration and repair availability, refer to the contact information below. Annual calibrations should be performed to verify meter performance and accuracy. Product specifications are subject to change without notice. Please visit our website for the most up-to- date product information: www.extech.com.

Contact Customer Support

Customer Support Telephone List: https://support.flir.com/contact
Calibration, Repair, and Returns: repair@extech.com
Technical Support: https://support.flir.com

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All rights reserved including the right of reproduction in whole or in part in any form
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