TTI QPX600D, QPX600DP Instruction Manual
QPX600D & QPX600DP
PowerFlex+ Dual DC Power Supplies
INSTRUCTION MANUAL
1
Table of Contents
Specification 2
EMC 6
Safety 7
Installation 8
Connections 9
Initial Operation 11
Manual Operation – Independent Mode 13
Manual Operation – Link Modes 21
Maintenance 22
Remote Operation 23
Remote Commands (QPX600DP only) 32
Note: The latest revisions of this manual, device drivers and software tools can be
downloaded from: http://www.tti-test.com/go/qsx
This manual is 48511-1460 Issue 7
2
Specification
General specifications apply for the temperature range 5°C to 40°C. Accuracy specifications
apply for the temperature rang e 18° C to 28° C af t er 1 hour warm-up with no load and calibration at
23°C. Typical specifications are determined by design and are not guaranteed.
OUTPUT SPECIFICATIONS (Each Output)
Voltage Range: Two ranges: 0V to 60V or 0V to 80V
Current Range: 0.01A to 50A
Power Range: Up to 600W
Voltage Setting: Resolution: 1mV (60V Range),
2mV (80V Range)
Accuracy: 0.1% of setting ± 2m V,
(± 4mV on 80V range)
Current Setting: Resolution 10mA
Accuracy: 0.3% of setting ± 20m A
Operating Mode: Constant voltage or constant current
with automatic cross-over provided
that the power demanded stays within
the power envelope, see graph.
Outside of this envelope the output
becomes unregulated. CV, CI or
UNREG mode indication in display.
Output Switch: Independent electronic switching, with ON indication. In addition, BOT H O N
and BOTH OFF keys permit both outputs to be switched on/off
synchronously (±10µs). Preset voltage and current displayed when off.
Output T erminals: Rear panel safety terminals accepting 6mm wire diameter, 6mm plugs or
8mm spades at 50 Amps max, or 4mm plugs at 30 Amps max.
Sensing: Switchable between local and remote. Screwless remote sense terminals on
rear panel. Sense miswiring trip and indication.
Ripple & Noise
(20MHz bandwidth):
Typically <3mVrms, <20mV pk-pk at maximum load, CV mode
Load Regulation: Change in output for any load change within PowerFlex envelope, using
remote sense:
Constant voltage: <0.01% ± 5mV
Line Regulation: Change in output for a 10% line change:
Constant voltage: <0.01% ± 5mV
Transient Response: <2ms to within 100mV of set level for a 5% to 95% load change.
Output Protection: Output will withstand an applied forward voltage of up to 90V.
Reverse protection by diode clamp for reverse currents up to 3A.
Over-voltage Protection
(OVP):
Range 2V to 90V. Resolut ion 0. 1V; accuracy: 0.2% ± 0. 2V.
Response time typically 100µs.
Over-current Protection
(OCP):
Range 2A to 55A. Resolution 0.1A; accuracy: 0.5% ± 0.2A.
Response time typically 100ms.
Over-temperature
Protection:
The output will be tripped off if a fault causes t he int er nal t em per ature to rise
excessively.
Temperatur e Coefficient: Typically <100ppm/°C
QPX600D & DP
Power Envelope
(per channel)
3
METER SPECIFICATIONS (Each Output)
Display Ty pe: 5-digit (Volts), 4-digit (Amps), black-on-white backlit LCD.
Voltage
(CI Mode and Unreg):
Resolution 1mV
Accuracy: 0.1% of reading ± 2 dig its
Current
(CV Mode and Unreg):
Resolution 10mA
Accuracy: 0.3% of reading ± 2 dig its
V x A: Resolution 0·1W
Accuracy: 0·5% ± 0·1W
V/A: Meter shows calculated nominal V/A value, together with uncertainty
range; 5 digit resolution.
LOGIC CONTROL INPUT and OUTPUT (Each Output)
LOGIC IN is a rear-panel opto-isolated input that is activated at an input cur r ent greater than
approximately 1mA. User can set LOGIC IN (via the keyboard) t o enable t he out put, disable the
output, or be ignored when it is activated.
LOGIC OUT is an isolated rear-panel open-collector output that will sink up to 2mA when activated
(‘switch closure’); the maximum voltage that can be applied to LOGIC O UT is 30VDC. User can
set LOGIC OUT to be ‘closed’ or ‘open’ for output enabled or disabled, current limit
(CI mode), power limit (UNREG mode), or f or any fault trip.
ANALOG REMOTE CONTROL and MONITORING (Each Output)
Quasi-analogue inputs and outputs to set voltage and current limit and to m onit or ac t ual out put
voltage and current. The control inputs are read four times per sec ond by the
A-D converter and the output is set according to the selected input scaling; similarly the monitor
outputs are updated four times per second with values representing the actual output voltage and
current. These signals each have a range of 0 to 10V or 0 t o 5V with respect to the shared COM
return signal; the set range applies to all inputs and outputs.
Analogue Control Voltage Range: Keyboard selectable to be 0 to 10Vdc or 0 to 5Vdc for
range maximum output. Absolute maximum input 20Vdc.
Analogue Control Accuracy: Voltage: 0.3% ± 4mV; Current: 0.5% ± 40mA.
Analogue Control Common Mode Range: ± 2.5Vdc max to negative output.
Analogue Control Input Impedance:
Nominally 40kΩ.
Analogue Monitor Voltage Range: Same as set for Analogue Control Voltage Range.
Analogue Monitor Accuracy: Voltage: 0.3% ± 4mV; Current: 0.5% ± 40mA.
Analogue Monitor Output:
Connect to isolated measuring system with >10kΩ input
impedance. Will withstand a short-circuit.
LINK MODES
In addition to independent output operation, the instr ument is capable of operating in a number of
different voltage tracking modes which can be activated from the LINK MENU. These modes
include Output 2 voltage (V2) tracking O ut put 1 voltage (V1) by any ratio in the range 5% to
2000%, V2 and I2 set to track V1 and I 1 ( 1:1) with total V1 + V2 displayed (useful when Output 1
and Output 2 are series connected), V2 and I2 set to track V1 and I1 (1:1) with total I1 + I2
displayed (useful when Output 1 and Output 2 are parallel connected).
KEYBOARD & ROTARY CONTROL
All functions, including the selection and set-up of the remote control interfac es, can be set from
the keyboard. The rotary Jog control can be used to adjust output voltage and current settings in a
quasi-analogue mode. The output to be controlled is first selected with the appropriate Control key.
4
DISPLAY FEATURES
The displays (one for each output) are g r aphic LCDs, backlit by white LEDs; contrast is softwarecontrolled and can be adjusted from the keyboard.
The default status displays show the VOLTS (5 digits) and AMPS (4 digits) in 12mm hig h
characters, plus output range and stat us. At other times, for example during store or recall of
instrument set-ups, the displays show up to 7 lines of inform at ion, inst r uc t ions, or prompts.
INTERFACES (QPX600DP only)
Full digital remote control facilities are available through the RS232, LAN, USB and GPI B
interfaces. Setting and readbac k resolutions are the same as for the O utput and Meter
specifications respectively.
RS232: Standard 9-pin D-connector. Baud r ate 9600.
USB: Standard USB 2.0 hardware connection.
LAN: Auto speed detect(10/100MHz), Auto MDIX.
LXI V1.2, Class C compliant.
GPIB: Conforms with IEEE488.1 and IEEE488.2.
Remote Command
Processing Time:
Typically <100ms between receiving the command terminator for a
step voltage change at the instrument and the output voltage
beginning to change.
GENERAL
AC Input: 115V – 240V AC ± 10%, 50/60Hz.
Installation Category II.
Power Consumption: 1600VA max.
Operating Range: +5ºC to +40ºC, 20% t o 80% RH.
Storage Range:
−40ºC to + 70ºC.
Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2.
Store/Recall: Up to 10 set-ups can be saved and recalled via the keyboard or
remote interfaces.
Safety: Complies with EN61010-1.
EMC: Complies with EN61326.
Size: 130mm H (3U) x 356mm W x 413mm D
Weight: 9.2kg
Options: 19-inch rack kit.
5
EC Declaration of Conf ormity
We Thurlby Thandar Instruments Ltd
Glebe Road
Huntingdon
Cambridgeshire PE29 7DR
England
declare that the
QPX600DP & QPX600D Power Supplies
meet the intent of the EMC Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC.
Compliance was demonstrated by conformance to the following specifications which have been
listed in the Official Journal of the European Communit ies.
EMC
Emissions: a) EN61326-1 (2006) Radiated, Class A
b) EN61326-1 (2006) Conducted, Class A
c) EN61326-1 (2006) Harmonics, referring to EN61000-3-2 (2006)
Immunity: EN61326-1 (2006) Immunity Table 1, referring to:
a) EN61000-4-2 (2009) Electrostatic Discharg e
b) EN61000-4-3 (2006) Electromag net ic Field
c) EN61000-4-11 (2004) Voltage Interrupt
d) EN61000-4-4 (2004) Fast Transient
e) EN61000-4-5 (2006) Surge
f) EN61000-4-6 (2009) Conducted RF
Performance levels achieved are detailed in the user manual.
Safety
EN61010-1 Installation Category II, Pollution Degree 2.
CHRIS WILDING
TECHNICAL DIRECTOR
2 January 2013
6
EMC
This instrument has been designed to meet t he requirements of the EMC Directive 2004/108/EC.
Compliance was demonstrated by meeting the test limits of t he following standards:
Emissions
EN61326-1 (2006) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use. Test limits used were:
a) Radiated: Class A
b) Conducted: Class A
c) Harmonics: EN61000-3-2 (2006) Class A; the instrument is Class A by product category.
Immunity
EN61326-1 (2006) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use.
Test methods, limits and performance achieved are shown below (requirement shown in brackets):
a) EN61000-4-2 (2009) Electrostatic Discharge: 4kV air, 4kV contact, Perfor m anc e A (B).
b) EN61000-4-3 (2006) Electromagnetic Field:
3V/m, 80% AM at 1kHz, 80MHz – 1GHz: Performance B*(A) and
1.4GHz to 2GHz: Performance A (A); 1V/m, 2.0GHz to 2.7GHz: Performance A (A).
c) EN61000-4-11 (2004) Voltage Interrupt: ½ cycle and 1 cycle, 0%: Performance A (B);
25 cycles, 70%: Performance A (C); 250 cycles, 0%: Performance B (C), if Function 11 is
set (Output status at power-up same as at last power-down), ot her wise Performance C.
d) EN61000-4-4 (2004) Fast Transient, 1kV peak (AC line only; DC Output connections <3m,
therefore not tested
†
), Performance B (B).
e) EN61000-4-5 (2006) Surge, 0·5kV (line to line), 1kV (line to ground), Perform ance B ( B) .
f) EN61000-4-6 (2009) Conducted RF, 3V, 80% AM at 1kHz (AC line only; DC Output
connections <3m, therefore not tested
†
), Performance A (A).
†
signal lines were not tested on the basis that typical use will be with connections <3m, for which
there is no test requirement. Immunity performance with connections >3m is not g uar ant eed.
According to EN61326-1 the definitions of per formance criteria are:
Performance criterion A: ‘During test normal performanc e 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 tes t , temporary degradation, or loss of function or performance
which requires operator intervention or system reset occurs.’
*Performance B is stated because DC Output r egulation, or V & I measurement accuracy, may
deviate beyond Specification limits under the test conditions. However, t he possible deviations are
still small and unlikely to be a problem in practice. Minor deviations are possible at 300-350MHz,
670-740MHz and 810-820MHz at 3V/m.
Note that if operation in a high RF field is unavoidable it is good pract ice t o c onnect the PSU to the
target system using screened leads which have been passed (together) t hr ough an absorbing
ferrite sleeve fitted close to t he PSU ter m inals.
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 remade
correctly and that case screws are correctly ref it t ed and tightened.
b) In the event of part replacement becoming necessary, only use components of an identical type,
see the Service Manual.
7
Safety
This power supply is a Safety Class I instrument according to I EC classification and has been
designed to meet the requirements of EN61010-1 (Safety Requirements for Elect r ical Eq uipm ent
for Measurement, Control and Laboratory Use). It is an Installation Category II instrument intended
for operation from a nor m al 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 inst r um ent 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 bet ween +5°C and –10°C without degr adation of its safety. Do not
operate while condensation is present.
Use of this instrument in a manner not s pecified by these instructions may impair the safety
protection provided. Do not operate the instrument outside its rat ed supply voltages or
environmental range.
WARNI NG! THIS INSTRUMENT MUST BE EARTHED
Any interruption of the mains earth conductor inside or outside the inst r ument will make the
instrument dangerous. Int ent ional inter r upt ion is pr ohibited. The prot ect ive action mus t not be
negated by the use of an extension cord without a protective conductor.
When the instr um ent is c onnect ed to its supply, term inals may be live and opening t he c overs 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, m aint enance 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 minut es after
switching off power.
Any adjustment, maintenance and repair of the opened inst r um ent 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 def ect ive, has been subject to mechanical damage, excessive moisture
or chemical corrosion the safety protect ion m ay 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 cur r ent 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.
l
mains supply ON.
alternating current (ac)
direct current (dc)
Caution – risk of danger. Refer to the documentation (this manual) to find
out the nature of the potential hazard and any actions w hich hav e to be taken.
8
Installation
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
Connect the instrument to the AC supply using the mains lead provided. Should a mains plug be
required for a different m ains out let soc ket, a suitably rated and approved mains lead set should
be used which is fitted with the required wall plug and an IEC60320 C13 connector for t he
instrument end. To determ ine t he m inimum c ur r ent rating of the lead-set for the intended AC
supply, r efer to the power rating informat ion on t he equipment or in the Specification.
WARNI NG! THIS INSTRUMENT MUST BE EARTHED.
Any interruption of the mains earth conductor inside or outside the inst r um ent will make the
instrument dangerous. Int ent ional inter r upt ion is pr ohibited.
Mounting
This instrument is suitable both for bench use and r ack mounting. It is delivered with feet for benc h
mounting. The front feet include a tilt mechanism for optimal panel angle.
A rack kit for mounting in a 19” rack is available from t he Manufac t ur er s or t heir overseas agents.
Ventilation
The power supply is cooled by intelligent multi-speed fans which vent at the rear. Take care not to
restrict the air inlets at the fr ont ( top, bottom & side panels) or the exit at the rear. In rack-mounted
situations allow adequate space around the instrument and/or use a fan tray for forced cooling.
9
Connections
Rear Panel Conne ctions
Output Terminals (each output)
The load should be connected to the positive (red) and negative (black ) terminals marked
OUTPUT. The term inals accept 4m m plugs into the end (but note that 4mm plugs will only support
30 Amps), 6mm diameter wire or plugs into the cross-hole or 8mm spade connections (with a
maximum blade width of 16mm). The wiring and connectors must be capable of supporting the
current required; f or 50 Amps, 6mm
2
cable is needed.
Remote sense connections to the load, if required, are made from the positive (+) and
negative (−) REMOTE SENSE terminals. Remote sense operation is selected from the keyboard
or via a remote control interface; R/SNS ( Remote Sense) shows in the display beside the output
status ( OFF, CV, CI or UNREG ) when remote sense is selected and goes off when remot e
sense is deselected.
The M4 threaded opening marked
provides a connection point to safety earth gr ound.
Warning! Voltages above 70Vdc are hazardous live according t o EN 61010-1 and great care must
be taken when using the power supply at voltages above this level.
Always ensure that connections to the terminals are only made in a manner that does not
compromise the protection provided by the terminals t hem sel ves.
Ensure that the contact parts of all connecting wires are fully inserted and inaccessible to the touch.
Always make connections to the instrument with the OUTPUT off.
Logic Input (each output)
LOGIC IN is connected directly to the input of an isolat ing opto-coupler; there is no series resistor.
The input is activated when a current greater than appr oximately 1mA is forced between LOGIC IN
and LOGIC COMMON. The function of LOGIC IN is set from the keyboard.
Do not force a current exceeding 25mA between the terminals. Do not apply a voltage to LOGIC
IN / LOGIC COMMON exceeding 50V with respect to .
Logic Output (each output)
LOGIC OUT is the open-collector output of an opto-isolated NPN transistor that will sink up to 2mA
when active (‘switch closure’). The function of LOGIC OUT is set f r om the keyboard.
The maximum voltage that can be applied between LOGIC OUT and LOGIC COMmon is 30VDC.
Do not apply external voltages between the terminals exceeding 30VDC.
Analogue Control (each output)
V CONTROL and I CONTROL inputs provide quasi-analogue control of the Output Voltage and
Current Limit respectively. The inputs are read 4 times per second by the A-to-D converter and the
output is set according to the selected input scaling . The input scaling for both can be set as 0 to
10 Volts or 0 to 5 Volts for rang e maximum output. The Analogue Control functions and scaling are
both selected from the keyboard.
The V CONTROL and I CONTROL inputs are differential, with a limited common mode range of
± 2.5Vdc with respect to the negative output. They should be driven from a ‘floating’ source such
as another power supply.
Do not apply external voltages between the terminals exceeding 20Vdc.
10
Analogue Monitor (each output)
The output terminal voltage and output current m ay be monit or ed on V MONITOR and I MONITOR
respectively. The output s caling for both is the same as that set for V CONTROL and I CONTROL,
see previous section.
The Analogue Monitor outputs should be connected to a measuring system with ‘floating’ inputs
such as a DMM.
Do not apply external voltages to these terminals.
RS232 (QPX600DP only)
9−pin female D−connector with pin connections as shown below. Can be connected to a standard
PC port using a fully wired 1:1 male-female cable without any cross-over connections.
Pin Name
Description
1 RI
Passively asserted (+V through 10kΩ)
2 TXD Transmitted data from instrument
3
RXD
Received data to instrument
4 CTS
5 GND Signal ground
6 RTS
Passively asserted (+V through 10kΩ)
7
DSR
No internal connection
8 DTR
9 CD No internal connection
Signal ground is connected to instrument ground.
USB (QPX600DP only)
The USB port is connected to instrument ground. It conforms with USB 2.0 (Full Speed) and
accepts a standard USB cable. The Windows plug-and-play functions should aut om atically
recognise that the instrument has been connec t ed. If the correct driver is not found, follow the
Windows on-screen prompts and install the required files from the CD supplied.
LAN (QPX600DP only)
The LAN interface is designed to meet LXI ( Lan eXtensions for Inst r um entat ion) version 1. 2;
the instrument is Class C compliant. Remote contr ol using the LAN interface is possible using a
TCP/IP Socket protocol. The instrument also contains a basic W eb s er ver which provides
information on the unit and allows it to be configur ed. Since it is possible to misconfigure the LAN
interface, making it im possible t o com m unicate with the instrument over LAN, a LAN Configuration
Initialise (LCI) mechanism is provided via a recessed switch on the rear panel (marked LAN
RESET) to reset the unit to the factory default.
Further details are given in the Remote Operation chapter. For more informat ion on LX I s tandards
refer to www.lxistandard.org/home
GPIB (QPX600DP only)
The GPIB signal grounds are connected to the instrument ground. The implemented subsets are:
SH1 AH1 T6 L4 LEO SR1 RL2 PP1 DC1 DT0 C0 E2
The GPIB address is set from the front panel.
11
Initial Operation
This section of the manual is a gener al intr oduc t ion t o t he c ont r ols and oper ation of the instrument
and is intended to be read before using the power supply for t he first time. In this manual f r ont
panel keys, connections and indicators are shown in capitals, e.g. ESCAPE, JOG SET, OUT PUT,
ON. Messages shown on the display are printed in a different type-font, e.g.
Enter V,
Limits, CV, Store.
Switching On, Output On/Off
The power switch is located at the bottom left of the front panel.
At power-up the default behaviour is for the instr um ent 's settings to be restored to thos e
automatically saved when it was switched off, but with the outputs in independent mode and
always off (
OFF is shown at the top right-hand side of each output ’s display). However, the user
can change this default setting suc h t hat the power-down status of the individual outputs and of the
tracking mode are restor ed at power-up, see the Extra Functions section.
Each DC Output is switched on and off electronically with alternate presses of its key; the ON
lamp illuminates when the Output is on. At the same time the message above the VOLTS and
AMPS display changes from
OFF to CV (constant voltage) or CI (constant current) to indicate
the present operating mode; should the load cause t he instrument to operate outside its
guaranteed power range the display will instead show
UNREG (unregulated). Alternatively, the
BOTH ON or BOTH OFF keys can be used to switch both out puts on or off together; the outputs
switch synchronously within <10µs of each other. Note that, if one output is already on and the
other off, BOTH ON will turn the off out put on and BO TH OFF will turn the on output off.
Select Output
The output to be adjusted is selected by pressing CONTROL 1 or CONTROL 2; the corresponding
LED lamp will light to show which output is currently under the control of the numeric keypad or
rotary control. Note that the individual
ON keys, as well as the BOTH ON and BOTH
OFF keys, will always operate regardless of which output is currently selected by the CONTROL
keys. Control of Output 1 is the default setting at power-up.
Keypad
Only the principles of operation are outlined here; the set t ing of individual parameters is given in
detail in later sections. The paramount consideration in designing the user inter face has been to
make changing settings as 'safe' as possible (i.e. with minimal risk of ac cidentally applying
excessive voltages to a load) whilst achieving ease of use. This has been achieved by requiring
the user to confirm (OK) new numer ic set tings, with the option to ESCAPE at any point or even to
simply pause until the operation times-out and the instrument r eturns to its original settings. In
addition, display messages and LED indicators prompt, guide or warn the us er suc h t hat entry or
control errors are minimised. Where some of these features (e.g. beeps) are considered
unnecessary by regular users, the option exists to disable them, see the Extra Func t ions sec t ion.
Press CONTROL 1 or 2 to select the output to be adjusted. Under nor mal conditions the numeric
keypad is disabled; any numeric key presses will simply be ignored. To set a voltage with the
keypad first press the V NUMERIC SET key; the VOLTS display changes to show the present set
value in a smaller font, with the message Enter V or ESC below it, and the OK lamp starts
flashing. The new value is then entered from the k eyboard; as it is ent er ed it is displayed directly
below the present setting, replacing the prom pt message. At any time during entry the new setting
can be confirmed with the OK key, e.g. it is sufficient to key in 1, OK to change the set ting to
1Volt. When OK is pressed the display reverts to show just the new setting in the full-s ize f ont and
the OK lamp stops flashing; if O K is not pr ess ed within 10s of the last numeric key the entry is
cancelled and the display returns to its original setting. If ESCAPE is pressed anytime in the entry
procedure, entry is cancelled and the display returns to its original setting. The current limit is set in
exactly the same way after first pressing I NUMERIC SET.
The OK key is used to confirm most keypad entries. At all other times it becomes the VIEW V/I
LIMITS key and pressing it will cause the display to show preset output voltage and current limit f or
3 seconds; during this period the
Limits message shows in the display.
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