Xantrex Technology XPH 35-4D, XPH 35-4T User Manual

XPH Series Dual
and Triple Output
35V 4A DC
Power Supply

XPH 35-4D
XPH 35-4T

Operating Manual

www.programmablepower.com

About Xantrex

Xantrex Technology Inc. is a world-leading supplier of advanced power electronics and controls
with products from 50 watt mobile units to one MW utility-scale systems for wind, solar, batteries,
fuel cells, microturbines, and backup power applications in both grid-connected and stand-alone
systems. Xantrex products include inverters, battery chargers, programmable power supplies,
and variable speed drives that convert, supply, control, clean, and distribute electrical power.

Trademarks

XPH series is a trademark of Xantrex International. Xantrex is a registered trademark of Xantrex
International.

Other trademarks, registered trademarks, and product names are the property of their respective
owners and are used herein for identification purposes only.

Notice of Copyright

© Xantrex International. All rights reserved.

Disclaimer

UNLESS SPECIFICALLY AGREED TO IN WRITING, XANTREX TECHNOLOGY INC.
(“XANTREX”)

(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF

ANY TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER
DOCUMENTATION.

(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSS OR DAMAGE, WHETHER

DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT
OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH INFORMATION WILL
BE ENTIRELY AT THE USER’S RISK.

Date and Revision

April 2008 – Revision 4

Part Number

975-0101-01-04

Contact Information

Telephone: [phone] (toll free in North America)

1-858-450-0085 (direct)

Fax: [phone]

Email: [e-mail]

[e-mail]

Web: www.programmablepower.com

1

Table of Contents

Introduction 3
Specification 3
EMC 5
Safety 6
Installation 7
Connections 7
Operation - Main Outputs 8
Operation - Auxiliary Output 9
Operation - General 9
Calibration 10
Maintenance 12

Instructions en Francais

Sécurité 13
Installation 14
Connexions 14
Fonctionnement - Sorties principales 15
Fonctionnement – Sortie Auxiliaire 16
Fonctionnement - Généralités 16
Maintenance 17

Bedienungsanleitung auf Deutsch

Sicherheit 18
Installation 19
Anschlüsse 19
Betrieb - Hauptausgänge 20
Betrieb – Hilfsausgang 21
Betrieb - Allgemein 21
Wartung 22

Istruzioni in Italiano

Sicurezza 23
Installazione 24
Collegamenti 24
Funzionamento - Uscite principali 25
Funzionamento – Uscita Ausiliaria 26
Funzionamento - Generale 26
Manutenzione 27

Instrucciones en Español

Seguridad 28
Instalación 29
Conexiones 29
Operación - Salidas Principales 30
Operación – Salida Auxiliar 31
Operación - General 31
Mantenimiento 32

Warranty Information 33

2

Introduction

The XPH 35-4D and XPH 35-4Tv provide high levels of power (up to 305 watts) in a compact and
attractive case style.

High resolution controls allow precise setting of voltage and current levels which are indicated on
accurate and legible digital meters.

Excellent line and load regulation are matched by low noise and good transient response. High
power efficiency ensures that the unit remains cool without any fan noise.

The XPH 35-4D has two independent and isolated outputs each with a 0 to 35V, 0 to 4A
capability. The outputs operate in constant voltage or constant current mode with automatic cross­over and mode indication. Each output has its own on-off switch. Where higher voltages or
currents are required the outputs can be wired in either series or parallel to provide voltages up to
70 volts or currents up to 8 Amps.

The XPH 35-4T has, in addition, an Auxiliary ‘logic voltage’ output with a 5A current capability. To
reflect the increasing usage of low-voltage logic devices, this output can be preset between

1.5 volts and 5 volts via a front panel control.
The total power capability is 280 watts for the dual supply and 305 watts for the triple.
The XPH series incorporates separate digital voltage and current meters on each main output.

The meters use bright 14mm (0·56”) LED displays and have an update rate of 4 per second
providing near instantaneous response. Simultaneous metering of voltage and current provides
accurate information “at a glance” and avoids any possibility of misinterpretation. When an output
switch is set to “off”, the current limit setting is displayed enabling conditions to be set before the
load is connected. With the right-hand main output off, the right-hand meters can be used to
momentarily display the preset Auxiliary voltage and current limit.

The XPH series has been designed to meet the stringent requirements of relevant IEC standards
for safety and EMC, including harmonics emissions. All outputs are intrinsically short circuit proof,
and are protected against external voltages and reverse currents.

MAIN OUTPUTS

Voltage Range: 0V to 35V minimum.
Current Range: 0A to 4A minimum.
Output Voltage Setting: By coarse and fine controls.
Output Current Setting: By single logarithmic control.
Operating Mode: Constant voltage or constant current with automatic cross-over.
Output Switch: Electronic. Preset voltage and current displayed when off.
Output Terminals: Universal 4mm safety binding posts on 19mm (0·75”) pitch.
Output Impedance:

Output Protection: Output will withstand up to 40V forward voltage.

Load Regulation: <0·01% of maximum output for 90% load change.
Line Regulation: <0·01% of maximum output for 10% line change.
Ripple & Noise

(20MHz bandwidth):

Specification

Typically <5mΩ in constant voltage mode.
Typically >50kΩ in constant current mode.

Reverse protection by diode clamp for reverse currents up to 3A.

Typically <2mVrms, <10mVpk-pk (CV mode).

3

Transient Response: <200µs to within 50mV of set level for 90% load change.
Temperature Coefficient: Typically <100ppm/°C.
Status Indication: Output on lamp. Constant current mode lamp.

METER SPECIFICATIONS (Main Outputs)

Meter Types: Dual 3 digit meters with 14mm (0·56") LEDs. Reading rate 4 Hz.
Meter Resolutions: 100mV, 10mA.
Meter Accuracies: Voltage 0.3% of reading ± 1 digit,

Current 0.6% of reading ± 1 digit.

AUXILIARY LOGIC OUTPUT (XPH 35-4T only)

Voltage: Variable <1·5V to >5V by front panel control.
Meter Voltage Accuracy: 0·3% ± 1 digit
Current Limit: 5A minimum.
Output Protection: Output will withstand up to 7V forward voltage.

Diode clamp reverse protection for currents up to 3A.
Load Regulation: <0·5% for 90% load change.
Line Regulation: <0·1% for 10% line voltage change.
Ripple & Noise

(20MHz bandwidth):
Transient Response: Typically <200µs to within 50mV of set level for 90% load change.
Temperature Coefficient: Typically <100ppm/ºC.
Status Indication: UNREG lamp.

GENERAL

AC Input: 110V - 240V AC ± 10%, 50/60Hz. Installation Category II.
Power Consumption: 500VA max.
Operating Range: +5ºC to +40ºC, 20% to 80% RH.
Storage Range:
Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2.
Safety: Complies with EN61010-1.
EMC: Complies with EN61326.
Size: 260 x 160 x 320mm (WxHxD).

Typically <2mVrms, <10mVpk-pk (CV mode).

−40ºC to + 70ºC.

4

Weight: 4·3kg

This instrument has been designed to meet the requirements of the EMC Directive 89/336/EEC.
Compliance was demonstrated by meeting the test limits of the following standards:

Emissions

EN61326 (1998) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use. Test limits used were:

a) Radiated: Class B
b) Conducted: Class B
c) Harmonics: EN61000-3-2 (2000) Class A; the instrument is Class A by product category.

Immunity

EN61326 (1998) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use.

Test methods, limits and performance achieved were:
a) EN61000-4-2 (1995) Electrostatic Discharge : 4kV air, 4kV contact, Performance A.

b) EN61000-4-3 (1997) Electromagnetic Field, 3V/m, 80% AM at 1kHz, Performance B.
c) EN61000-4-11 (1994) Voltage Interrupt, 1 cycle, 100%, Performance B.
d) EN61000-4-4 (1995) Fast Transient, 1kV peak (AC line), 0.5kV peak (DC Outputs),

e) EN61000-4-5 (1995) Surge, 0.5kV (line to line), 1kV (line to ground), Performance B.
f) EN61000-4-6 (1996) Conducted RF, 3V, 80% AM at 1kHz (AC line only; DC Output

EMC

Performance B.

connections <3m not tested), Performance A.

According to EN61326 the definitions of performance criteria are:

Performance criterion A: ‘During test normal performance within the specification limits.’
Performance criterion B: ‘During test, temporary degradation, or loss of function or

performance which is self-recovering’.
Performance criterion C: ‘During test, temporary degradation, or loss of function or

performance which requires operator intervention or system reset occurs.’
Where Performance B is stated it is because DC Output regulation may deviate beyond

Specification limits under the test conditions. However, the possible deviations are still small and
unlikely to be a problem in practice.

Note that if operation in a high RF field is unavoidable it is good practice to connect the PSU to
the target system using screened leads which have been passed (together) through an absorbing
ferrite sleeve fitted close to the PSU terminals.

Cautions

To ensure continued compliance with the EMC directive observe the following precautions:
a) after opening the case for any reason ensure that all signal and ground connections are

b) In the event of part replacement becoming necessary, only use components of an identical

remade correctly and that case screws are correctly refitted and tightened.

type, see the Service Manual.

5

Safety

This power supply is a Safety Class I instrument according to IEC classification and has been
designed to meet the requirements of EN61010-1 (Safety Requirements for Electrical Equipment
for Measurement, Control and Laboratory Use). It is an Installation Category II instrument
intended for operation from a normal single phase supply.

This instrument has been tested in accordance with EN61010-1 and has been supplied in a safe
condition. This instruction manual contains some information and warnings which have to be
followed by the user to ensure safe operation and to retain the instrument in a safe condition.

This instrument has been designed for indoor use in a Pollution Degree 2 environment in the
temperature range 5°C to 40°C, 20% - 80% RH (non-condensing). It may occasionally be
subjected to temperatures between +5°C and –10°C without degradation of its safety. Do not
operate while condensation is present.

Use of this instrument in a manner not specified by these instructions may impair the safety
protection provided. Do not operate the instrument outside its rated supply voltages or
environmental range.

WARNING! THIS INSTRUMENT MUST BE EARTHED

Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited. The protective action must not be
negated by the use of an extension cord without a protective conductor.

When the instrument is connected to its supply, terminals may be live and opening the covers or
removal of parts (except those to which access can be gained by hand) is likely to expose live
parts. The apparatus shall be disconnected from all voltage sources before it is opened for any
adjustment, replacement, maintenance or repair. Capacitors inside the power supply may still be
charged even if the power supply has been disconnected from all voltage sources but will be
safely discharged about 10 minutes after switching off power.

Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided
as far as possible and, if inevitable, shall be carried out only by a skilled person who is aware of
the hazard involved.

If the instrument is clearly defective, has been subject to mechanical damage, excessive moisture
or chemical corrosion the safety protection may be impaired and the apparatus should be
withdrawn from use and returned for checking and repair.

Make sure that only fuses with the required rated current and of the specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse holders is prohibited.

Do not wet the instrument when cleaning it.
The following symbols are used on the instrument and in this manual:-

Earth (ground) terminal.

mains supply OFF.

6

l

mains supply ON.

alternating current (ac)

direct current (dc)

Mains Operating Voltage

This instrument has a universal input range and will operate from a nominal 115V or 230V mains
supply without adjustment. Check that the local supply meets the AC Input requirement given in
the Specification.

Mains Lead

When a three core mains lead with bare ends is provided this should be connected as follows:

BROWN - MAINS LIVE

Installation

BLUE - MAINS NEUTRAL
GREEN/YELLOW - EARTH Safety Earth Symbol

When fitting a fused plug a 5 amp fuse should be fitted inside the plug. As the colours of the
wires in the mains lead of this apparatus may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:

The wire which is coloured green-and-yellow must be connected to the terminal in the plug which
is marked by the letter E or by the safety earth symbol shown above or coloured green or green­and-yellow.

The wire which is coloured blue must be connected to the terminal which is marked with the letter
N or coloured black.

The wire which is coloured brown must be connected to the terminal which is marked with the
letter L or coloured red.

WARNING! THIS INSTRUMENT MUST BE EARTHED.

Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited.

Connections

All connections are made from the front panel.
The load should be connected to the positive (red) and negative (black) terminals marked

OUTPUT.

The terminal marked

7

is connected to the chassis and safety earth ground.

The operation of both main outputs is identical; the following description applies to both.

Setting Up the Output

With the POWER switch on (l) and the output OFF the output voltage and current limit can
be accurately preset using the VOLTAGE and CURRENT controls; the left-hand meter shows the
set voltage and the right-hand meter shows the set maximum current.

Operation - Main Outputs

When the output switch is switched ON, the
actual voltage and the right-hand meter the actual load current.

Constant Voltage

The output voltage is adjusted using the coarse and fine VOLTAGE controls; the CURRENT
control sets the maximum current that can be supplied.

Constant Current

If the load resistance is low enough such that, at the output voltage set, a current greater than the
current limit setting would flow, the power supply will automatically move into constant current
operation. The current output is adjusted by the CURRENT control and the VOLTAGE controls
set the maximum voltage that can be generated.

The CC lamp lights to show constant current mode.

Instantaneous Current Output

The current limit control can be set to limit the continuous output current to levels down to 10mA.
However, in common with all precision bench power supplies, a capacitor is connected across the
output to maintain stability and good transient response. This capacitor charges to the output
voltage and short-circuiting of the output will produce a current pulse as the capacitor discharges
which is independent of the current limit setting.

Protection

lamp lights; the left-hand meter now shows the

The output has intrinsic short-circuit protection and is protected from reverse voltages by a diode;
the continuous reverse current must not exceed 3 Amps, although transients can be much higher.

The output is protected against externally applied forward voltages of up to 40V.

8

Output Voltage

The output voltage can be set between 1·5V and 5·0V using the front panel rotary adjustment
beside the centre terminals. With the right-hand main output OFF, pressing the SHOW AUX
PRESET button will display the AUX output voltage and current limit on the right-hand meters.

Current Limit

The output will go into current limit at between 5A and 6A; the UNREG lamp lights in this
condition.

Protection

The output has intrinsic short-circuit protection and is protected from reverse voltages by a diode;
the continuous reverse current must not exceed 3 Amps, although transients can be much higher.

The output is protected against externally applied forward voltages of up to 7V.

Connection to the Load

Operation - Auxiliary Output

Operation - General

The load should be connected to the positive (red) and negative (black) output terminals. Both
are fully floating and either can be connected to ground.

Series or Parallel Connection with Other Outputs

The outputs of the power supply are fully floating and may be used in series with other power
supply units to generate high DC voltages up to 300V DC.

The maximum permissible voltage between any terminal and earth ground (
maximum permissible voltage between either terminal of one output and any terminal of another
output on the same supply is also 300VDC.

WARNING! Such voltages are exceedingly hazardous and great care should be taken to shield
the output terminals for such use. On no account should the output terminals be touched when
the unit is switched on under such use. All connections to the terminals must be made with the
power switched off on all units.

It should be noted that the unit can only source current and cannot sink it, thus units cannot be
series connected in anti-phase.

The unit can be connected in parallel with others to produce higher currents. Where several units
are connected in parallel, the output voltage will be equal to that of the unit with the highest output
voltage setting until the current drawn exceeds its current limit setting, upon which the output will
fall to that of the next highest setting, and so on. In constant current mode, units can be
connected in parallel to provide a current equal to the sum of the current limit settings.

) is 300VDC; the

Ventilation

The power supply is very efficient but nevertheless can generate significant heat at full power.
The supply relies on convection cooling only and it is therefore important that ventilation is never
restricted if performance and safety are to be maintained.

9

Allow at least 5 minutes warm-up before commencing calibration.

Access to Calibration Adjustments

All adjustments are on the front panel control board; all the trimmers are adjusted from the
reverse side of the board through holes in the board. To gain access to the board it is necessary
to remove the top cover.

When the instrument is connected to its supply the removal of covers is likely to expose live parts.
The instrument should be disconnected from all voltage sources before it is opened for any
adjustment, replacement, maintenance or repair. Capacitors inside the power supply may still be
charged even if the power supply has been disconnected from all voltage sources but will be
safely discharged about 5 minutes after switching off power.

Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided
as far as possible and, if inevitable, shall be carried out only by a skilled person who is aware of
the hazard involved.

Remove the 6 side screws and the front handle screw to release the top cover.
Component adjustment references are given as Channel A/ Channel B, e.g. VR5/VR105;

Channel A is the left-hand output.

Calibration

WARNING!

Equipment Required

A 5½ digit multimeter with better than 0·05% accuracy on dc volts and better than 0·1% accuracy
on dc current (to 5A); alternatively use a precision shunt for current measurement.

Control pcb calibration points (viewed from rear)

Rheostat or other high power load arrangement to provide up to 5A load at 35V.

Voltage Calibration

Connect the DMM (set to Volts) across the output. Set voltage and current controls to minimum.
Switch output ON (Check LED is on) and check for a reading of 00·0V ± 0·1V on the Volts display
and DMM; check the Amps display reads 0·00 ± 0·01A.

Set voltage and current controls to maximum. Adjust VR5/VR105 (maximum output volts) for a
reading of 35·16V to 35·24V on the DMM. Adjust VR6/VR106 (measured output volts) until the
Volts display matches the reading on the external DMM.

Switch output OFF. Adjust VR10/110 (preset volts) until the Volts display shows 35·2.

10

Current Calibration

Switch output OFF. Set output voltage to nominally 2V. Set current control to minimum. Connect
the DMM (set to Amps) and load in series across the output. Switch output ON.

Adjust VR8/108 (offset compensation of current control error amp) for a reading of 0·003A
± ·001A on the DMM. Check that the CC LED is ON.

Increase voltage controls and current control to maximum. Adjust load until the DMM reads 4·00A
± 0·02A. Adjust VR7/107 (measured output current) until the Amps display matches the DMM
reading.

Reduce load until the CC LED is ON. Adjust VR4/104 (maximum output current) until the Amps
display shows 4·05.

Voltage Regulation

Connect the DMM (set to Volts) across the output, no load, output ON.
Adjust voltage controls for a reading of 18.xxxx on the DMM; note exact reading.
Connect load, set current control to maximum and adjust load for 4A output current. Note that the

DMM should be connected at the ‘back’ of the output terminals, closest to the internal sense
connection, and the load plugged in to the 4mm sockets of the terminals. Adjust VR9/109
(differential voltage gain) until the external DMM matches the previous reading exactly.

1.5V/5V Output

Connect the DMM to the output. Use the front panel control to adjust the output to 5.0x Volts.
With the right-hand Main output OFF, press the SHOW AUX PRESET button to display the AUX
OUT voltage; adjust VR1 on the 1.5V/5V pcb until the display reads 5.0V.

Connect the DMM (set to Amps) and load in series across the output. Adjust load until the
UNREG LED comes ON. Check that the DMM reads >5 Amps.

Connect the DMM (set to Volts) in parallel with the load across the output. Adjust load until the
UNREG LED just goes off. Check that the DMM reads the same as in the 5V check above,
±0·025V.

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