Aim TTi EX355P INSTRUCTION MANUAL [ml]
EX355P
Programmable Bench Power Supply
Table of Contents
Introduction 2
Specification 3
Safety 5
Installation 6
Connections 6
Operation 7
Remote Operation 8
Remote Commands 9
Maintenance 12
Instructions en Francais 13
Bedienungsanleitung auf Deutsch 21
Istruzioni in Italiano 29
Instrucciones en Español 37
1
Introduction
The EX355P is a digitally controlled version of the EX355 with an isolated RS-232 interface.
Using mixed-mode regulat ion technology it provides 0 to 35V at 0 to 5A in a compact and
lightweight unit.
The EX355P offers a low-cost solution for a basic progr am m able PSU, and will be sufficient for
many applications where the sophistication and complexity of GPIB is not needed.
A simple command set allows remote control of voltage, current and output-enable tog ether with
read-back of meter ing values and operat ional status.
Local control is via three rotary encoders providing rapid and accurate setting of voltage and
current for bench use.
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 EX series has been designed to meet t he s t r ingent requirements of the latest relevant IEC
standards for safety and EMC, including harmonics emissions. All outputs are intrinsically short
circuit proof, and are protec t ed against external voltages and reverse currents.
2
Voltage Range:
0V to 35V minimum
Current Range:
0.01A to 5A minimum
Resolution 10mV. Set t ing accuracy 0.3% ± 20mV (for V >0.1V)
Resolution 10mA. Setting accuracy 0.6% ± 20m A (for I >0.1A)
over.
Output Switch:
Electronic. Preset voltage and current displayed when off.
Output T erminals:
Universal 4mm safety binding posts on 19mm (0.75”) pit ch.
Reverse protection by diode clamp for reverse currents up to 3A.
Load Regulation:
<0.01% of maximum output for a 90% load change.
Line Regulation:
<0.01% of maximum output for a 10% line change
(20MHz bandwidth):
Transient Response:
<200µs to within 50mV of set level for a 5% to 95% load change.
speed:
excursion (for a resistive load). Excludes command processing t im e.
90% load
No load
90% load
No load
Up
210ms
110ms
Down
15ms
1.8s
Temperatur e Coefficient:
Typically <100ppm/°C
Status Indication:
Output on lamp. CC mode lamp.
14mm (0.56") LED displays. Reading rate 4/sec.
zero.
Current (CV mode) 0.6% ± 20mA
General specifications apply for the tem per ature range 5°C to 40°C. Accuracy specifications
apply for the temperature range 18°C to 28°C after 1 hour warm-up with no load and calibration
at 23°C. Typical specifications are determined by design and are not guaranteed.
OUTPUT
Voltage Setting: By coarse and fine rotary encoders or RS-232 interface.
Current Setting: By single rotary encoder or RS-232 interface.
Operating Mode: Constant voltage (CV) or constant current (CC) with automatic cros s -
Output Protection: Output will withstand up to 40V forward voltage.
Specification
Ripple & Noise
Voltage Programming
METER SPECIFICATIONS
Meter Types: Separate 4 digit meter for voltage and 3 digit m et er for current with
Meter Resolutions: 100mV, 10mA
Typically <2mVrms, <10mV pk-pk, constant voltage mode.
Maximum time required f or the output to settle within 1% of its total
Note that in constant voltage mode the meter will show the set
voltage to resolution of 10mV. However, the metering resolution is
limited to 100mV and when in CC mode the last digit will be set to
Meter Accuracies: Voltage (CC mode) 0.3% ± 100m V.
MEMORY
The power supply saves the voltage, current and output-enable status at power down and
restores the settings at power up.
3
9-pin D connector.
Baud Rate:
Variable from 600 baud to 9,600 baud.
Current, Read On/Off, Read Mode (CV or CC).
Current 0.6% ± 20mA (for I >0.1A).
Setting Resolution:
Voltage 10mV. Current 10mA.
Readback Accuracy:
Voltage 0.3% ± 100mV. Current 0.6% ± 20mA.
Readback Resolution:
Voltage 100mV. Current 10mA.
change.
Installation Category II.
Power Consumption:
400VA max.
Operating Range:
+5ºC to +40ºC, 20% to 80% RH.
Storage Range:
−40ºC to + 70ºC.
Environmental:
Indoor use at altitudes up to 2000m, Pollution Degr ee 2.
instrument via http://www.aimtti.com/support (serial no. needed).
Size:
140 x 160 x 295mm (WxHxD).
Weight:
2.8 kg
RS-232 CONTROL
Interface: RS-232 interface, fully opto-isolat ed from power supply output.
Remote Functions: Set voltage, Set Current, Set Output On/Off, Read Voltage, Read
Setting Accuracy: Voltage 0.3% ± 20mV (for V >0.1V).
Remote command
processing time:
GENERAL
AC Input: 220V-240V AC ± 10%, 50/60Hz.
Safety & EMC: Complies with EN61010-1 & EN61326-1.
Typically <10ms between receiving the command terminator for a step
voltage change at the instrument and the out put voltage beg inning to
110V-240V AC ± 10% by factory option.
For details, request the EU Declaration of Conformity for this
4
l
alternating current (ac)
Safety
This power supply is a Safety Class I instrument according to IEC classification and has been
designed to meet the requirem ents of EN61010-1 (Safety Requirements f or Elect r ical Eq uipm ent
for Measurement, Control and Laborator y Use). It is an Installation Category II instrument
intended for operation from a normal single phase supply.
This instrument has been t ested 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 r etain the inst r um ent in a safe condition.
This instrument has been designed f or 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° and -10°C without degradation of its safet y. Do not
operate while condensation is present.
Use of this instrument in a manner not spec ified by these instructions may impair the safety
protection provided. Do not operate the instrum ent outside its rat ed supply voltages or
environmental range.
WARNING! THIS INSTRUMENT MUST BE EARTHED
Any interruption of the mains earth conduct or inside or outside t he inst r um ent will make the
instrument dangerous. Int entional 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 f or 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 minutes after s witching 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 def ec t ive, 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 c hecking and repair.
Make sure that only fuses with the required rated current and of the specified t ype 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 m anual:-
Earth (ground) terminal.
mains supply OFF
5
mains supply ON
direct current (dc)
1
DCD
Linked to pins 4 and 6
2
TXD
Transmitted data from instrument
3
RXD
Received data to instrument
4
DTR
Linked to pins 1 and 6
5
GND
Signal ground
6
DSR
Linked to pins 1 and 4
7
RTS
Linked to pin 8
8
CTS
Linked to pin 7
9
–
No internal connection
Mains Operating Voltage
Check that the instrument oper ating voltage marked on the rear panel is suitable for the local
supply.
Mains Lead
When a three c or e m ains lead with bare ends is provided this should be connect ed as follows:
BROWN - MAINS LIVE
Installation
BLUE - MAINS NEUTRAL
GREEN/YELLOW - EARTH Saf et y Earth Symbol
When f it t ing 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.
Any interruption of the mains earth conduct or inside or outside the inst r ument will make the
instrument dangerous. Int entional interruption is prohibited.
Output Terminals
All power connections are made from the fr ont panel.
The load should be connected to the positive (red) and negat ive (black ) terminals marked
OUTPUT. Bot h ar e fully floating and either can be connected to ground.
WARNING! THIS INSTRUMENT MUST BE EARTHED.
Connections
RS232
6
The terminal marked
9–pin D–connector for PC remote control with the following connections:
Pin Name Description
Connect to a PC with a cable which has pins 2, 3 and 5 wired plus pins 1, 4 & 6 and pins 7 & 8
linked at the PC end.
is connected to the chassis and safety eart h ground.
Setting Up the Output
With the PO WER switch on (l) and the output off the out put voltage and cur r ent 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 c ur r ent.
Operation
When the
preset voltage but the right-hand met er now shows the actual load current.
output switch is switched on, the ON lamp lights; the left-hand meter still shows the
Constant Voltage
The output voltage is adjusted using the coar se and fine VOLTAGE controls; the coarse control
changes the voltage in 100mV steps and the fine contr ol in 10mV st eps. The CURRENT control
sets the maximum current that can be supplied; the c ont r ol changes the current in 10mA steps.
Constant Current
If the load resistance is low enough such that, at t he 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 contr ols
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 t o 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
The output has intrinsic short-cir cuit pr ot ec t ion and is pr ot ected from reverse voltages by a diode;
the continuous reverse current must not exceed 3 Amps, although transients can be much higher.
Connection to the Load
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 m ay be used in series with ot her power
supply units to generate high DC voltages up to 300V DC.
The maximum permissible voltage between any terminal and earth ground (
WARNING! Such voltages are exceedingly hazardous and great care should be taken to shield
the output terminals for s uch use. On no account should the output terminals be t ouched 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 hig hes t
output voltage setting until the current dr awn exceeds its current limit s et ting, upon which the
output will fall to that of the next highest setting, and so on. In constant curr ent m ode, units can
be connected in parallel to provide a current equal to the sum of the current limit settings .
) is 300VDC.
7
4
DTR
Linked to pins 1 and 6
5
GND
Signal ground
7
RTS
Linked to pin 8
8
CTS
Linked to pin 7
9
-
No internal connection
Note that the output terminals are rated at 15A maximum; if several outputs are operated in
parallel to source higher currents than this the junction should be made at a separate point, not
one of the terminals.
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 perf or mance and safety are to be maintained.
Remote command format and the remote commands themselves are detailed in the Remote
Commands chapter.
Baud Rate Selection
The Baud rate is set by pressing the OPT I ON SELECT/OK button until bAUd appears in the
left-hand display; the right-hand display shows the current set ting in the form of
Baud etc. Change the Baud rate by pressing the CHANGE butt on to step the rate through all the
possible options. When t he required rate is displayed press OPTION SELECT/OK again to
confirm and exit the rate change m ode.
Remote Operation
960 for 9600
Remote/Local Operation
At power on the instrument will be in the local state with the Rem (remote) lamp off. When a
command is received the remote state will be entered and the Rem lamp will be turned on. The
rotary controls are not locked out by this action and the instrument will be returned to the local
state if they are used; however, if the instrument receives another character f rom the interface,
the remote state will again be entered.
Local operation of the rotary controls, output On/Off switch and CHANGE button can be disabled
by pressing the OPTION SELECT/OK but t on until
right-hand display shows the current sett ing ,
button selects
again to confirm and exit the change m ode.
Local operation can be restored at any time by pressing the O PTION SELECT/OK button; if
on or oFF ; when the required setting is displayed press OPTION SELECT/OK
LoCL has been set to oFF the first pres s of OPTION SELECT/OK ret ur ns t he inst rument to
local control and subsequent presses select the ot her modes as described above.
RS232 Connector
The 9-way D-type serial interface connector is located on the instrum ent rear panel. The pin
connections are as shown below:
Pin Name Description
1 DCD Linked to pins 4 and 6
2 TXD Transmitted data from instrument
3 RXD Received data to instrument
LoCL appears in the left-hand display; the
on or oFF . Alternate presses of the CHANGE
Connect to a PC with a cable which has pins 2, 3, 5, wired plus pins 1, 4, 6 and pins 7 and 8,
linked at the PC end, see diagram.
8
6 DSR Linked to pins 1 and 4
Start Bits: 1
Parity: None
Data Bits: 8
Stop Bits: 1
Baud rate is set as described above; the other interface parameters are fixed as follows:
RS232 Character Set
Any ASCII code can be used. Bit 7 of ASCII codes is ignored, i.e. assumed to be low. No
distinction is made between upper and lower case characters in command mnem onics and t hey
may be freely mixed. The ASCII control codes between 00H and 31H are ignored, except for 0AH
(Line Feed, LF) which is used as a command terminator.
RS232 Remote Com m and Formats
The instrument's input buff er acc epts a sing le com mand (or query) at a time, under int er r upt, in a
manner transparent to other instr um ent oper ations. Commands and queries must be sent as
specified in the command list and must be ter m inat ed with the com m and terminator code 0AH
(Line Feed, LF). Note that parameters ar e separat ed from the command header by one space
(20H).
After a command has been sent the contr oller must wait at least 10ms from the command
terminator before the next com mand (or query) is started, to allow the instrument t o c lear the
input buffer.
Responses to queries are sent immediately. The controller must wait for the response to a query
before the next command or quer y is sent. The instrument responds to the controller af t er every
query as specified in the commands list. I n every case a respons e is t er m inat ed by 0DH
(Carriage Return, CR) followed by 0AH (Line Feed, LF).
<WHITE SPACE> is defined as character codes 00H to 20H inclusive. <WHITE SPACE> is ignored
except in command identifiers. e.g. '*I DN?' is not equivalent to '*I DN?'.
The high bit of all characters is ignored.
The commands are case insensitive.
Remote Commands
9
<rmt>
<RESPONSE MESSAGE TERMINATOR>, CR followed by LF.
<nr1>
A number with no fractional part, i.e. an integer.
<nr2>
A number in a fixed point format, e.g. 11.52, 3.61, etc.
error will be generated.
error will be generated.
ON
Sets the DC output on.
OFF
Sets the DC output off.
V<nr2><rmt>
the command V? will be V 12.55<rmt>.
I<nr2><rmt>
command I? will be I 1.00<rmt>.
V<nr2><rmt>
response to the command VO? will be V12.55<rmt>.
I<nr2><rmt>
the command IO? will be A0.93<rmt>.
or OUT OFF<rmt>
or M CC<rmt>
Command List
This section lists all commands and queries implemented in this instrument. The commands are
listed in alphabetical order within the function groups.
The following nomenclature is used:
Set-up Commands
V <nr2> Set the voltage to <nr2>. The value of <nr 2> m us t be in Volts; no multipliers are
allowed. If the value of <nr2>, after rounding, is outside the range of t he output an
I <nr2> Set current limit to <nr2>. The value of <nr 2> m us t be in Amps; no multipliers are
allowed. If the value of <nr2>, after rounding, is outside the range of t he output an
Readback Commands
V? Returns the set output voltage in Volts in <nr2> numeric format .
The syntax of the response is
Example: If the set output voltage is 12.55 Volts the response to
I? Returns the output current limit in Amps in <nr2> numeric format. The syntax of the
response is
Example: If the current limit is 1.00 Amps the response to the
VO? Reads and returns the actual output voltage in Volts in <nr2> numeric format. The
syntax of the response is
Example: If the actual output voltage is 12.55 Volts the
IO? Reads and returns the actual output curr ent in Amps in the <nr2> numeric format .
The syntax of the response is
Example: If the output current is 0.93 Amps the response to
OUT? Returns status of the output as
OUT ON<rmt>
M? Returns output mode status as
M CV<rmt>
10
2 = command value outside instrument limits.
*RST
Resets the instrument to the default power-up settings (1.00V, 1.00A, output off).
instrument and <version> is the revision level of the soft ware installed.
ERR? Returns the value in the error register in the form ERR <nr 1> < r m t>
0 = no errors.
1 = command not recognised.
Miscellaneous Commands
*IDN? Returns the instrument identification. The exact response is deter m ined by the
instrument configurat ion and is of the form <NAME>,<model>, 0, < version> < r m t >
where <NAME> is the manufacturer's name, <m odel> defines the type of
11
Fuse
Maintenance
The Manufacturers or their ag ents overseas will provide repair for any unit developing a fault.
Where owner wish to undertake their own maintenance work , t his s hould only be done by skilled
personnel in conjunction with the service manual which may be purchased directly from the
Manufacturers or their agents overseas.
The correct fuse type is:
10 Amp 250V HBC time-lag(T), 5 x 20mm.
Note that the main function of the fuse is to make t he instrument safe and limit damag e in the
event of failure of one of the switching devices. If a fuse fails it is therefore very likely that the
replacement will also blow, because the supply has developed a fault; in such circumstances the
instrument will need to be returned to the manuf ac t ur er for service.
Make sure that only fuses of the required rated current and specified t ype are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse-holders is prohibited.
To replace a f use, first disconnect the instrument from the AC supply. Remove the 6 cover
securing screws and lift off the cover. Replace the fuse with one of the correct t ype and refit the
cover.
Cleaning
If the PSU requires cleaning use a clot h t hat is only lig ht ly dampened with water or a mild
detergent. Polish the display window with a soft dry cloth.
WARNING! TO AVOID ELECTRIC SHOCK, OR DAMAGE TO THE PSU, NEVER ALLOW
WATER TO GET INSIDE THE CASE. TO AVOID DAMAGE TO THE CASE OR DISPLAY
WINDOW NEVER CLEAN WITH SOLVENTS.
12
courant alternatif (c.a.)
Sécurité
Cet instrument est de Classe de sécurité 1 suivant la classif icat ion I EC et il a été c onst ruit pour
satisfaire aux impératifs EN61010-1 ( impér atifs de sécurité pour le matériel électr iq ue en vue de
mesure, commande et utilisation en laboratoire) . Il s'agit d'un instrument d' installation Catégorie
II devant être exploité depuis une alimentation monophasée habituelle.
Cet instrument a été soumis à des essais conformément à EN61010-1 et il a été four ni en t out
état de sécurité. Ce manuel d'instructions contient des informations et avertissements qui doivent
être suivis par l'utilisateur afin d'assurer un fonctionnement de toute sécurité et de cons er ver
l'instrument dans un état de bonne sécurité.
Cet instrument a été conçu pour être ut ilisé en interne dans un environnement de pollution
Degré 2, plage de températur es 5°C à 40°C, 20% - 80% HR (sans condensation). Il peut êt r e
soumis de temps à autre à des températures c om pr ises entre +5°C et -10°C sans dégradation
de sa sécurité. Ne pas l'utiliser lorsqu'il y a de la condensation.
Toute utilisation de cet instrument de manière non spécifiée par ces instruct ions r isque d'affecter
la protection de sécurité conférée. Ne pas utiliser l'instrument à l'extérieur des tensions
d'alimentation nominales ou de la gamme des conditions ambiantes spécifiées.
AVERTISSEMENT! CET INSTRUMENT DOIT ETRE RELIE A LA TERRE
Toute interr upt ion du conduc t eur de terre secteur à l'intérieur ou à l'extérieur de l' inst r um ent
rendra l'instrument dangereux. I l est abs olum ent int er dit d'effectuer une interruption à dessein.
Ne pas utiliser de cordon de prolongation sans conducteur de protect ion, car c eci annulerait sa
capacité de protection.
Lorsque l'instrument est r elié au sect eur, il est possible que les bornes soient sous tension et par
suite, l'ouverture des couvercles ou la dépose de pièces (à l'exception de celles auxquelles on
peut accéder manuellement) risque de met tre à découvert des pièces sous tension. Il faut
débrancher ke cordon secteur de l'appareil avant de l'ouvrir pour effectuer des réglages,
remplacements, travaux d'entretien ou de réparations. Les condens at eur s qui se trouvent dans le
bloc d'alimentation risquent de rester chargés, même si le bloc d'alimentation a été déconnecté
de toutes les sources de tension, mais ils se décharg er ont en toute sécurité environ 10 minutes
après extinction de l'alimentation.
Eviter dans la mesure du possible d'effectuer des rég lages, travaux de réparations ou d'entretien
lorsque l'instrument ouvert est br anc hé au secteur, mais si c'est absolument nécessaire, seul un
technicien compétent au courant des risques encour us doit effectuer ce genre de travaux.
S'il est évident que l'instrument est défectueux, qu'il a été soumis à des dégâts mécaniq ues , à
une humidité excessive ou à une corrosion chimique, la protection de sécurit é s er a am oindr ie et
il faut retirer l'appareil, afin q u'il ne soit pas utilisé, et le renvoyer en vue de vérifications et de
réparations.
Remplacer les fusibles uniquement par des fusibles d' int ensit é nom inale requise et de type
spécifié. Il est interdit d'ut iliser des fusibles bricolés et de court-circuiter des porte-fusibles.
Eviter de mouiller l'instrument lors de son nettoyage.
Les symboles suivants se trouvent sur l'instrument, ainsi que dans ce m anuel.
Borne de terre (masse)
l
13
alimentation secteur ON (allumée)
alimentation secteur OFF (éteinte)
courant continu (c.c.)
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