Spellman XLG SERIES User manual

R
High Voltage Power Supply
MODEL:
SERIAL#:
DATE:
SPELLMAN
HIGH VOLTAGE ELECTRONICS
CORPORATION
475 Wireless Blvd.
Hauppauge, New York, 11788
[phone]*FAX: [phone]*
E-mail: [email protected]
Website: www.spellmanhv.com
XLG/XLF MANUAL 118021-001 Rev C
XLG/XLF SERIES

IMPORTANT SAFETY PRECAUTIONS
SAFETY
THIS POWER SUPPLY GENERATES VOLTAGES THAT ARE DANGEROUS AND MAY BE FATAL.
OBSERVE EXTREME CAUTION WHEN WORKING WITH THIS EQUIPMENT.
High voltage power supplies must always be grounded.
Do not touch connections unless the equipment is off and the
Capacitance of both the load and power supply is discharged.
Allow five minutes for discharge of internal capacitance of the power supply.
Do not ground yourself or work under wet or damp conditions.
SERVICING SAFETY
.
Maintenance may require removing the instrument cover with the power on.
Servicing should be done by qualified personnel aware of the electrical hazards.
WARNING note in the text call attention to hazards in operation of these units
that could lead to possible injury or death.
CAUTION notes in the text indicate procedures to be followed to avoid possible
damage to equipment.
Copyright ©2000, Spellman High Voltage Electronics Corporation. All Rights Reserved.
This information contained in this publication is derived in part from proprietary and patent data. This information has
been prepared for the express purpose of assisting operating and maintenance personnel in the efficient use of the
model described herein, and publication of this information does not convey any right to reproduce it or to use it for
any purpose other than in connection with installation, operation, and maintenance of the equipment described.
118004-001 REV. B

WICHTIGE SICHERHEITSHINWEISE
SICHERHEIT
DIESES HOCHSPANNUNGSNETZTEIL ERZEUGT LEBENSGEFÄHRLICHE HOCHSPANNUNG.
SEIN SIE SEHR VORSICHTIG BEI DER ARBEIT MIT DIESEM GERÄT.
Das Hochspannungsnetzteil muß immer geerdet sein.
Berühren Sie die Stecker des Netzteiles nur, wenn das Gerät ausgeschaltet ist und die elektrischen
Kapazitäten des Netzteiles und der angeschlossenen Last entladen sind.
Die internen Kapazitäten des Hochspannungsnetzteiles benötigen ca. 5 Minuten, um sich zu entladen.
Erden Sie sich nicht, und arbeiten Sie nicht in feuchter oder nasser Umgebung.
Notwendige Reparaturen können es erforderlich machen, den Gehäusedeckel während des Betriebes zu
entfernen.
Reparaturen dürfen nur von qualifiziertem, eingewiesenem Personal ausgeführt werden.
“WARNING” im folgenden Text weist auf gefährliche Operationen hin, die zu Verletzungen oder zum Tod
führen können.
“CAUTION” im folgenden Text weist auf Prozeduren hin, die genauestens befolgt werden müssen, um
eventuelle Beschädigungen des Gerätes zu vermeiden.
SERVICESICHERHEIT
118004-001 REV. B

PRECAUTIONS IMPORTANTES POUR VOTRE SECURITE
CONSIGNES DE SÉCURITÉ
CETTE ALIMENTATION GÉNÈRE DES TENSIONS QUI SONT DANGEUREUSES ET PEUVENT ÊTRE FATALES.
SOYEZ EXTRÊMENT VIGILANTS LORSQUE VOUS UTILISEZ CET ÉQUIPEMENT.
Les alimentations haute tension doivent toujours être mises à la masse.
Ne touchez pas les connectiques sans que l’équipement soit éteint et que la capacité à la fois de la charge et de
l’alimentation soient déchargées.
Prévoyez 5 minutes pour la décharge de la capacité interne de l’alimentation.
Ne vous mettez pas à la masse, ou ne travaillez pas sous conditions mouillées ou humides.
La maintenance peut nécessiter l’enlèvement du couvercle lorsque l’alimentation est encore allumée.
Les réparations doivent être effectuées par une personne qualifiée et connaissant les risques électriques.
Dans le manuel, les notes marquées « WARNING » attire l’attention sur les risques lors de la manipulation de ces
équipements, qui peuvent entrainer de possibles blessures voire la mort.
Dans le manuel, les notes marquées « CAUTION » indiquent les procédures qui doivent être suivies afin d’éviter
d’éventuels dommages sur l’équipement.
CONSIGNES DE SÉCURITÉ EN CAS DE REPARATION
118004-001 REV. B

IMPORTANTI PRECAUZIONI DI SICUREZZA
SICUREZZA
QUESTO ALIMENTATORE GENERA TENSIONI CHE SONO PERICOLOSE E
POTREBBERO ESSERE MORTALI.
PONI ESTREMA CAUTELA QUANDO OPERI CON QUESO APPARECCHIO.
Gli alimentatori ad alta tensione devono sempre essere collegati ad un impianto di terra.
Non toccare le connessioni a meno che l’apparecchio sia stato spento e la capacità interna
del carico e dell’alimentatore stesso siano scariche.
Attendere cinque minuti per permettere la scarica della capacità interna dell’alimentatore
ad alta tensione.
Non mettere a terra il proprio corpo oppure operare in ambienti bagnati o saturi d’umidità.
SICUREZZA NELLA MANUTENZIONE.
Manutenzione potrebbe essere richiesta, rimuovendo la copertura con apparecchio
acceso.
La manutenzione deve essere svolta da personale qualificato, coscio dei rischi elettrici.
Attenzione alle AVVERTENZE contenute nel manuale, che richiamano all’attenzione ai
rischi quando si opera con tali unità e che potrebbero causare possibili ferite o morte.
Le note di CAUTELA contenute nel manuale, indicano le procedure da seguire per evitare
possibili danni all’apparecchio.
118004-001 REV. B

XLG/XLF MANUAL i 118020-001 REV E
Table of Contents
PAGE
1. INTRODUCTION
1.1 Description of the XLG/XLF Series....................................................................1
1.2 XLG/XLF Specifications.....................................................................................1
1.3 Standard Features.................................................................................................2
1.3.1 Remote Operating Features ....................................................................2
1.3.2 System Status and Fault Diagnostic Display..........................................2
1.4 Options.................................................................................................................3
1.5 Interpreting the Model Number...........................................................................3
2. INSPECTION & INSTALLATION
2.1 Initial Inspection..................................................................................................4
2.2 Mechanical Installation........................................................................................4
3. OPERATING INSTRUCTIONS
3.1 Operation .............................................................................................................6
3.2 Standard Features.................................................................................................6
4. PRINCIPLES OF OPERATION
4.1 Chassis .................................................................................................................16
4.2 Line Rectifier and Filtering..................................................................................16
4.3 Inverter.................................................................................................................17
4.4 High Voltage Transformer...................................................................................17
4.5 High Voltage Assembly.......................................................................................17
4.6 Control/Power PWB ............................................................................................17
4.7 Front Panel Assembly..........................................................................................18
4.8 Filament Supply PWB .........................................................................................18
4.9 Options.................................................................................................................18
5. OPTIONS
5.1 Adjusting Overload Trip......................................................................................19
5.2 220C AC Single Phase Input ...............................................................................19
5.3 No Slow Start.......................................................................................................19
5.4 Non-Standard Slow Start .....................................................................................19
5.5 Extra Length Output Cable..................................................................................19
5.6 Adjustable Power Trip.........................................................................................19
5.7 Arc Trip Option ...................................................................................................19
5.8 Instant ON Option................................................................................................19
5.9 Custom Designed Models....................................................................................19

XLG/XLF MANUAL ii 118020-001 REV E
6. MAINTENANCE
6.1 Periodic Servicing................................................................................................21
6.2 Performance Test.................................................................................................21
6.3 High Voltage Dividers.........................................................................................21
7. REPLACEMENT PARTS
7.1 Replacement Parts................................................................................................22
7.2 Correspondence and Ordering Spare Parts..........................................................22
8. FACTORY SERVICE
8.1 Warranty Repairs.................................................................................................23
8.2 Factory Service Procedures .................................................................................23
8.3 Ordering Options and Modifications...................................................................23
8.4 Shipping Instructions...........................................................................................23
APPENDIX
A. Specification Controls (Custom Models Only)
LIST OF FIGURES
Figure 2.1 Dimensions XLG and XLF............................................................................5
Figure 3.1 Typical Operating Setup XLG.......................................................................8
Figure 3.2 Typical Operating Setup XLF........................................................................9
Figure 3.3A Remote Programming via Voltage Source ....................................................11
Figure 3.3B Remote Programming via External Resistance..............................................11
Figure 3.4 Remote Monitor Test Point Designations......................................................12
Figure 3.5 Remote Control of HV ON and HV OFF......................................................12
Figure 3.6 External Inhibit Interface Circuit...................................................................13
Figure 3.7 External Interlock Interface Circuit...............................................................13
Figure 3.8 Remote HV ON and Remote HV OFF Indicator Circuit...............................14
Figure 3.9 Remote Mode Indicators Interface ................................................................15
Figure 5.1 Instant ON Option..........................................................................................20
Figure 5.2 Adjustable Power Remote Interface ..............................................................20
LIST OF TABLES
Table 1.1 Options...........................................................................................................3
Table 3.1 Rear Panel Interface.......................................................................................10
Table 4.1 List of Main Assemblies................................................................................17

XLG/XLF MANUAL 1 118020-001 REV E
Chapter 1
INTRODUCTION
1.1 Description of the XLG/XLF
Series
he XLG/XLF series of high voltage power supplies
represent an advanced approach to X-ray generator
power requirements. These power supplies provide
all of the power, control, and support functions required
for practically all X-ray applications. The XLG/XLF
series provide high voltage, high current outputs with
very low ripple. Extremely stable voltage and current
outputs result in significant performance improvements
over previously available technology. Low output ripple
provides higher intensity levels, with no increase in tube
loading.
All these advancements are possible only by Spellman’s
long history in X-ray power systems. These series of
power supplies utilize extremely advanced resonant
conversion techniques, along with sophisticated digital
technology.
The XLF series is specifically designed for X-ray tube
application where the high voltage is a negative polarity,
and the filament circuits are referenced to the cathode
high voltage potential, (floating filament). The XLG
series is specifically designed for X-ray tube applications
where the high voltage is a positive polarity, and the
filament circuits are referenced to cathode ground
potential, (grounded filament).
The X-ray tube voltage and tube emission current are all
continuously adjustable via front panel and/or remote
controls.
The power supplies operate from a variety of line
voltages and are convection cooled for 1 – 300W models
and fan cooled for 800 to 1200W models requiring no
water cooling. Custom designed units for single use or
OEM applications are available.
1.2 XLG/XLF Specifications
Output Control: Voltage and current are
continuously adjustable over the entire range from
zero to maximum rating a ten-turn potentiometer
with a lockable counting dial.
Input Voltage: 115Volts AC10%, 50/60Hz, single
phase or 220Volts AC 10%, 50/60Hz, single phase.
1200W models are available with 220 V AC input
only. Specify input voltage at time of order. Other
line voltages are available.
Voltage Regulation:
Load Regulation: 0.005% of full voltage for a no
load to full load change.
Line Regulation: 0.005% of full voltage over the
specified input voltage range.
Current Regulation:
Load Regulation: 0.05% of full current ±100uA
for any voltage change.
Line Regulation: 0.01% of full current over the
specified input voltage range.
Ripple: 0.03%rms below 1kHz,
0.75%rms above 1kHz.
Filament XLG:
HPWR: 9A, 3V
LPWR: 3A, 3V
Filament XLF: 5A, 15V.
Stability: 0.01% per hour after 1/2 hour warm up.
0.02% per 8 hours (typical).
Temperature Coefficient: 100 ppm per C. Higher
stability (50 ppm per ºC) available on special order.
Ambient Temperature:
Operating: 0C to +40C
Storage: -40C to +85C
Metering: Digital voltage and current meters are
accurate to 1%.
Weight: 17 to 30 lbs. (7.7 to 14kg) depending on
model.
Physical:
XLG:
30-60kV: 3 ½”H x 19”W x 19”D rack mount.
(89 x 483 x 483mm).
80-130V: 3 ½”H x 19”W x 19”D rack mount.
(89 x 483 x 483mm).
XLF:
3 ½”H x 19”W x 20”D rack mount.
(89 x 483 x 508mm).
T

XLG/XLF MANUAL 2 118020-001 REV E
1.3 Standard Features
The XLG/XLF series incorporates several standard
features designed to optimize user satisfaction and safety.
KV AND MA/FILAMENT CURRENT RAMP
CIRCUITS: This feature provides for a gradual rise for
kV, mA and filament current. This feature is designed to
limit voltage shock and filament shock to the X-ray tube.
The kV ramp rate is approximately 6 seconds. The
filament current is slowly increased until the desired mA
level is achieved. This time is typically 5 seconds for full
mA output. These ramp conditions are started at the
initial HV ON control signal.
ARC DETECT / ARC QUENCH / ARC COUNT:
These features allow the user to tailor the power supply to
meet specific needs in dynamic load applications. If an
arc occurs, the output is inhibited for approximately one
second, then the output is ramped up to the preset level
with the Slow-start circuitry. See Chapter 3 for operating
details and information for user customization for these
features.
INTERNAL FAULT PROTECTION: The XLG/XLF
series continually monitors internal circuits critical to the
proper operation of the power supply. In the event that
one of these circuits does not function correctly, the fault
detection circuit latches the appropriate fault on the front
panel display and turns off the outputs and reverts the unit
to the POWER DOWN mode.
INDICATOR LAMPS: HIGH VOLTAGE OFF and
HIGH VOLTAGE ON indicators.
OUTPUT CABLE: XLG models are provided with a
ten foot shielded high voltage output cable. The cables
are designed with a plug arrangement so that they can be
easily removed from the mating receptacle located on the
rear of the chassis. internal EMI filter and fuse provide
protection against line voltage surges and power supply
faults.
1.3.1 Remote Operating Features
REMOTE PROGRAMMING: Allows remote
adjustment of the output voltage and current via an
external voltage source. The output power is also
remotely controllable when the CPC or APT option is
ordered.
REMOTE MONITOR: Allows remote monitoring of
the tube voltage and tube emission current. NOTE:
Output power remote monitor is included with the CPC
and APT options.
REMOTE HIGH VOLTAGE CONTROL: Allows
remote control of the HIGH VOLTAGE ON and HIGH
VOLTAGE OFF functions. Signals are also provided for
remote indication of HV ON or HV OFF status.
EXTERNAL INHIBIT: A circuit that will inhibit the
high voltage output is provided of the 25 pin mini-D
connector on the rear of the chassis. A logic low, ground,
will inhibit the high voltage output and a logic high, open,
will restore the high voltage output to the preset level.
NOTE: The External Inhibit circuit should
NOT be used for protection against injury or for safety
interlock. See External Interlock for this type of safety
control
EXTERNAL INTERLOCK: Interlock connections are
provided on the terminal block on the rear of the chassis
for connection to a safety switch. The unit will not
operate unless the interlock circuit is closed. During high
voltage operation, opening the interlock circuit will cause
the High Voltage to shut off. This circuit should be used
for safety interlock circuits.
1.3.2 System Status and Fault
Diagnostic Display
“Dead Front” type indicators are provided to give the user
complete indication of system operation and fault
conditions. If a fault occurs the power supply will revert
to the POWER DOWN mode. This is indicated by both
the HV ON and HV OFF lamps turning off. To reset,
depress the HV OFF switch.
VOLTAGE (CONTROL): Indicates the output voltage
regulator circuit is maintaining voltage regulation.
CURRENT (CONTROL): Indicates the output current
regulator circuit is maintaining current regulation.
POWER (CONTROL): Indicates the output power
regulator circuit is limiting tube power (optional).
HV INHIBIT: Indicates the high voltage supply is being
inhibited by either the EXTERNAL INHIBIT or internal
protection circuitry.
INTLK CLSD: Indicates the EXTERNAL
INTERLOCK connections are in the closed position.
This also indicates closure of internal power supply
interlocks.
INTLK OPEN: Indicates the EXTERNAL
INTERLOCK connections are in the open position. This
also indicates opening of internal power supply
interlocks.

XLG/XLF MANUAL 3 118020-001 REV E
OVERVOLT: Indicates the overvoltage protection
circuitry has caused the power supply to turn off.
Overvoltage protection is internally set to 110% of rated
output voltage.
OVERCURR: Indicates the output current has exceeded
the programmed current trip level when the AOL
(Adjustable Overload Trip) or the OL (overload Trip)
options are installed.
OVERPWR: Indicates the output power has exceeded
the internally set level or the remote programmed level if
the optional circuitry is installed.
ARC: Indicates that an arc has occurred within the
previous one second or that the ARC COUNT/TRIP has
shutdown the power supply.
RGLT ERR: Indicates a failure in the voltage, current or
power regulation circuitry. This fault usually occurs
when there is a lack of output power to maintain
regulation.
FILAMENT STANDBY/LIMIT (rear panel):
Indicates the filament is in a standby or limit mode. Also,
when illuminated, this indicates the emission current
regulator is not regulating.
1.4 Options
CODE DISCRIPTION
• AOL Adjustable Overload Trip (0-103%)
• APT Adjustable Power Trip
• AT Arc Trip
• SS(X) Non-Standard Slow Start
• NSS No Slow Start
• IO Instant ON
• ( ) Specify 220V or 100V or 200Vac Single
Phase input with order
• DPM4 4 ½ digit ±1 least significant digit panel mrt
• LL(X) Extra Length Output Cable
• SL Slides
• BFP Blank Front Panel
Table 1.1 XLG/XLF Options
The options available are listed kin Table 1.1. See
Section 5 for more information on these options along
with operating and set-up instructions. With few
exceptions, these options and modifications can be
retrofitted to your power supply at the factory in a short
time. For price and retrofit arrangements, contact
Spellman’s Sales Department.
1.5 Interpreting the Model
Number:
The model number of the power supply describes its
capabilities. After the series name is:
(1) the maximum voltage (in kV)
(2) the maximum output (in watts)
(3) the option codes for all options that are included.
Custom units have an X number after the option codes.
XL 30 P 1200/ AOL / X(#)
Series
Name
Voltage
Maximum
Polarity Option
"X" Number
Custom
Power
Maximum

XLG/XLF MANUAL 4 118020-001 REV E
Chapter 2
Inspection and Installation
nitial inspection and preliminary checkout
procedures are recommended. For safe
operation, please follow the step-by-step
procedures described in Chapter 3, Operating
Instructions.
2.1 Initial Inspection
Inspect the package exterior for evidence of
damage due to handling in transit. Notify the
carrier and Spellman immediately if damage is
evident. Do not destroy or remove any of the
packing material used in a damaged shipment.
After unpacking, inspect the panel and chassis
for visible damage.
Fill out and mail the Warranty Registration card
accompanying the unit. Standard Spellman
XLG/XLF high voltage power supplies and
components are covered by warranty. Custom
and special order models (with an X suffix in the
model number) are also covered by warranty.
2.2 Mechanical Installation
Units in the XLG/XLF series have front panel
holes for standard EIA rack mounting. The rack
must allow rear access for cable connections.
Units are fully enclosed and are suitable for
bench or tabletop operation. Standard unit
dimensions are shown in Figure 2.1. It is
strongly recommended to support the chassis by
guides or slides. Slides are available for ease of
servicing (SL option).
I

XLG/XLF MANUAL 5 118020-001 REV E
Figure 2.1 XLF & XLF DIMENSIONS

XLG/XLF MANUAL 6 118020-001 REV E
Chapter 3
Operating Instructions
3.1 Operation
WARNING
THIS EQUIPMENT GENERATES
DANGEROUS VOLTAGES THAT MAY BE
FATAL.
PROPER GROUNDING OF ALL HIGH
VOLTAGE EQUIPMENT IS ESSENTIAL.
WARNING:
Before connecting the power supply to the
AC line, follow this step-by-step procedure.
Do not connect the power supply to the AC
line until Step H is reached.
Failure to follow these procedures may void
the warranty.
A) Insure that the Circuit Breaker is in the OFF
position (0).
B) Check the input voltage rating on the nameplate
of the supply and make certain that this is the rating of the
available power source. Spellman XLG/XLF units
operate on 115VAC (or 220V if 220 V option is ordered),
single phase unless ordered with a different input voltage.
C) PROPER GROUNDING TECHNIQUE: The
chassis of high voltage power supplies must be grounded,
preferably to a water system ground using copper pipe or
other earth ground using the connection terminal at the
rear of the unit.. See Figure 3.1, 3.2 for a typical
operating setup.
The return line from the load should be connected to the
terminal on the rear of the power supply. Using a
separate external ground at the load is not recommended.
The units are provided with a three conductor line cord.
D) Attach the output cable to the load.
E) Plug the high-voltage output cable into the rear
of the supply and hand tighten the knurled collar.
F) Options Note: See section 5 for hook up and
operating instructions for the options on your unit.
Custom models may also require set up changes.
G) For initial turn-on, rotate the KILOVOLT
control fully counter-clockwise to the zero voltage
position.
H) The input power cable may now be connected to
the AC power line.
I) Switch the front panel circuit breaker to the ON
position (1). (If the supply is to be turned off for an
extended period of time the line cord should be
disconnected). The unit is now in the HIGH VOLTAGE
OFF mode. The HIGH VOLTAGE OFF light should be
lit.
J) Depress and hold the HIGH VOLTAGE OFF
switch. The front panel meters will now read the preset
value of the KILOVOLT control dial and the
MILLAMPERES control dial. To preset the desired level
of the current and voltage during operation, hold the
HIGH VOLTAGE OFF switch and rotate the appropriate
control dial while noting its corresponding meter reading.
Release the HIGH VOLTAGE OFF switch.
NOTE: No actual output is being produced at this stage.
K) Depress the HIGH VOLTAGE ON switch. The
light inside the switch should light up and the output will
slow start to the preset level output voltage and/or output
current.
Note: The XLG/XLF series is equipped with a slow start
circuit that ramps the output up to its maximum setting in
approximately 6 seconds after the HIGH VOLTAGE ON
switch is depressed.
L) To terminate the generation of output power,
depress the HIGH VOLTAGE OFF switch. In the HIGH
VOLTAGE OFF mode the power supply’s fault and
interface circuits are still active.
M) To turn off the power supply, turn the circuit
breaker to the off position (0).
NOTE: If a power supply fault, or system monitoring
fault occurs, the power supply will revert to the POWER
DOWN mode. In this mode the output power will be
turned off. The HV OFF lamp will be off. To reset,
depress the HV OFF Switch.

XLG/XLF MANUAL 7 118020-001 REV E
WARNING
AFTER TURNOFF, DO NOT HANDLE THE LOAD
UNTIL THE CAPACITANCE HAS BEEN
DISCHARGED!
LOAD CAPACITANCE MAY BE DISCHARGED BY
SHORTING TO GROUND.
WARNING
THE VOLTMETER ON THE POWER SUPPLY
FRONT PANEL DOES NOT READ THE OUTPUT
VOLTAGE WHEN THE POWER IS TURNED OFF,
EVEN IF A CHARGE STILL EXISTS ON THE
LOAD.
CAUTION
ALWAYS OPERATE THE UNIT WITH THE COVER
ON.
A fan maintains safe operating temperature in the XLF
power supplies by drawing air over the circuit
components. The cover must be on in order to direct the
air flow over the areas that need cooling. In operation,
the unit must be places so that the air intake and the fan
exhaust are clear of any obstructions that might impede
the flow of air. The XLG units do not use forced air
cooling. Simply maintain ambient temperature
specifications.
3.2 Standard Features
A note on remote interface circuitry and remote signal
grounding. Whenever possible, electrical isolation should
be provided when interfacing with any high voltage
power supply. For power control signals such as
EXTERNAL INTERLOCK, HIGH VOLTAGE OFF and
HIGH VOLTAGE ON isolated relay contacts should be
used. For status signals and control signals such as HIGH
VOLTAGE ON, HIGH VOLTAGE OFF, EXTERNAL
INHIBIT, etc. Opto-isolation should be used. If possible,
analog programming and monitoring signals should be
isolated via analog isolation amplifiers. Spellman
application engineers are available to assist in interface
circuitry design. All interface cables should be properly
shielded. All power supply signals should be referenced
to the power supplies signal ground on the rear terminal
block JB1-1.
REMOTE PROGRAMMING: Allows remote
adjustment of the output voltage and current via an
external voltage source. (Output power is also remotely
controllable with the CPC and APT options). In local
control (front panel control), jumpers are installed on the
connector JB1 in the rear of the chassis between JB1-10
and JB1-11 for voltage control and between JB1-8 and
JB1-9 for current control.
For remote programming, the jumpers are removed and a
positive voltage source, from 0 to 10 volts, is applied to
the appropriate terminals. Programming signals should
be referenced to JB1-1 signal ground. By adjusting the
voltage source from 0 volts (zero output) to 10 volts (full
rated output) the desired output can be selected. See
Figure 3.3A for wiring diagram and specifications.
An alternate method of controlling the output remotely is
by using external resistance such as a potentiometer or a
resistor network. For remote control the jumpers are
removed and the desired resistor configuration is
installed. See Figure 3.3B for wiring diagram.
REMOTE MONITOR: Test points are made available
on the rear of the chassis for monitoring the voltage and
current output. (Output power monitor is included with
the CPC and APT option). The test points are always
positive regardless of the output polarity, where zero 0 to
10 volts equals 0-100% of output ±0.5%. Test points
have an output impedance of 5k ohms. See Figure 3.4 for
test point designation.
REMOTE CONTROL: Remote control of the POWER
ON, HIGH VOLTAGE ON and HIGH VOLTAGE OFF
can be accomplished via the rear panel interface. The
POWER ON control is an on-off toggle contact. HIGH
VOLTAGE OFF and HIGH VOLTAGE ON are
controlled by momentary normally closed normally open
contacts, respectively. See Figure 3.5 for recommended
interface.
EXTERNAL INHIBIT: Allows the user to inhibit the
power supply output without switching HIGH
VOLTAGE OFF control. This circuit can be used to
generate fast slewing output waveforms or control high
voltage generation as in Laser and Capacitor discharge
applications. The maximum inhibit rate should not
exceed 5Hz. Consult factory for higher repetition rates or
high pulse load applications. See Figure 3.6 for the
recommended interface circuit.
WARNING
It is extremely dangerous to use this
Inhibit circuit to inhibit high voltage
generation for the purpose of servicing
or approaching any area of load
considered unsafe during normal use.

XLG/XLF MANUAL 8 118020-001 REV E
EXTERNAL INTERLOCK: Interlock connections are
provided on the terminal on the rear of the chassis for
connection to a safety switch. The unit will not operate
unless the interlock circuit is closed. If the interlock is
not being used, the jumper installed on the terminals
before shipping must be in place. If the jumper is
missing, or there is an open between the interlock
terminals the unit’s high voltage inverter will be disabled.
During high voltage operation, opening the interlock
circuit will cause the unit to revert to the HIGH
VOLTAGE OFF mode. Subsequent closing of the
interlock circuit will NOT return the unit to HIGH
VOLTAGE ON mode, this must be accomplished by
depressing the HIGH VOLTAGE ON switch. See Figure
3.7 for the recommended interface circuit.
ARC DETECT / ARC QUENCH ARC COUNT: The
ARC DETECT circuit senses dynamic arcing or
discharge conditions present at the output load. If an arc
occurs, the output is inhibited for one second. After the
one-second period, the output is ramped up to the
previous set level. This ramp is based on the standard
six-second slow start feature. The ARC DETECT ramp
circuit may be disabled by removing CR32 on the
Control/Power PWB. Caution should be observed if this
feature is disabled. Discharge rates of greater than 1 Hz
may cause excessive power dissipation in the power
supply’s output limiting resistors.
The ARC COUNT feature will allow the user to program
the ARC fault parameters. The ARC indicator on the
front panel will illuminate for approximately one second
after each arc has occurred. The power supply can be
programmed to trip to the POWER DOWN mode if an
arc occurs. The standard feature is programmed to trip
the power supply if 8 arcs occur within a twenty second
period.
REMOTE HIGH VOLTAGE ON & REMOTE HIGH
VOLTAGE OFF: Signals are provided for remote
monitoring of the HIGH VOLTAGE ON/OFF status. See
Figure 3.8 for recommended interface.
REMOTE MODE INDICATORS: Signals are
provided for remote indication of the control mode status,
voltage control, current control and power control. See
Figure 3.9 for the recommended interface.
Figure 3.1 Typical Operating Setup XLG

XLG/XLF MANUAL 9 118020-001 REV E
Figure 3.2 Typical Operating Setup XLF

XLG/XLF MANUAL 10 118020-001 REV E
JB1 SIGNAL SIGNAL PARAMETERS
1 Power Supply Common Signal Ground
2 External Inhibit Ground = Inhibit, Open = HV ON
3 External Interlock +15V at Open, <15mA at Closed
4 External Interlock Return Return for Interlock
5 Current Monitor 0 to 10V = 0 to 100% rated output
6 KV Test Point 0 to 10V = 0 to 100% rated output
7 + 10V Reference +10.24V, 1mA max.
8 Remote Current Program In 0 to 10V = 0 to 100% rated output
9 Local Current Program Out Front Panel Program Voltage
10 Remote Voltage Program In 0 to 10V = 0 to 100% rated output
11 Local Voltage Program Out Front Panel Program Voltage
12 Power Monitor 0 to 10V = 0 to 100% rated output
13 Remote Power Program In (Optional)
14 Local HV OFF Out +15V at Open, <25mA at Closed
15 HV OFF Connect to HV OFF for FP operation.
16 Remote HV ON +15V, 10mA max = HV ON
17 Remote HV OFF Indicator 0 = HV ON, +15V, 10mA max = HV OFF
18 Remote HV ON Indicator 0 = HV OFF, +15V, 10mA max = HV ON
19 Remote Voltage Mode Open Collector 50V max, 10mA max,
20 Remote Current Mode On = Active
21 Remote Power Mode
22 Remote PS Fault 0 = Fault, +15V, 1mA max = No Fault
23 + 15V Output +15V, 100mA max
24 Power Supply Common Signal Ground
Table 3.1 Rear Panel Interface

XLG/XLF MANUAL 11 118020-001 REV E
3
4
VProgram
Voltage
6
7
Z in = 10M Ohms
via isolation amplifiers.
All cables should be shielded with the shields
being returned to the chassis ground of the
High Voltage Power Supply.
9
8
10
11
Remote
Remote
Program
Current
Z in = 10M Ohms
Voltage Source 0-10V = 0-100% of Rated Output
Remove jumpers for
remote programming
1
JB1
v
PS Common
It is recommended that analog signals be isolated
5
2
Figure 3.3A Wiring Diagram for Remote Programming Via Voltage Source
1
JB1
PS Common
Fully Counterclockwise = Zero Output
5
2
3
4
6
7
Z in = 10M Ohms
All cables should be shielded with the shields
being returned to the chassis ground of the
High Voltage Power Supply.
9
8
10
11
Remote
Control
Current
Z in = 10M Ohms
Remove jumpers for
remote programming
20k Ohm
1mA max.
+10.32V CW
20k Ohm
CW
Voltage
Control
Remote
Fully Clockwise = 100% of Rated Output
If connections to external potentiometers are
excessively long (>10 ft), motorized
potentiometers are recommended.
Figure 3.3B Wiring Diagram for Remote Programming Via External Resistance

XLG/XLF MANUAL 12 118020-001 REV E
1
JB1
M
PS Common
It is recommended that analog signals be isolated
5
Current
Monitor
2
3
4
MMonitor
Voltage
6
7
Z out = 4.99k ohms ±0.1%
Z out = 4.99k ohms ±0.1%
via isolation amplifiers.
All cables should be shielded with the shields
being returned to the chassis ground of the
High Voltage Power Supply.
Figure 3.4 Remote Monitor Test Point Designations
It is recommended to use relay contacts for S1 and S2.
Relays should be located as close as possible to the high
voltage power supply. Coils should be driven form
isolated sources. Signals are at ¢ 15Vdc, 25mA max, and
are only to be used for contact closure.
S1 must be closed to enable HIGH VOLTAGE ON.
S1
S2
S1=Remote High
Voltage Off
High Voltage Power Supply.
to the chassis ground of the
14
JB1
Remove jumper for remote
15
16
17
Voltage On
S2=Remote High
high voltage control
All cables should be shielded
with the shields being returned
Figure 3.5 Remote Control of High Voltage ON and High Voltage OFF Interface

XLG/XLF MANUAL 13 118020-001 REV E
+15V
2.2K
to the power supply.
All cables should be shielded with the shields
being returned to chassis ground of the
High Voltage Power Supply.
High Voltage Power
Supply Internal inhibit circuitry.
3
4
ON
Inhibits
High
Voltage
PS Common
2
JB1
Transistor
Transistor should be located as close as possible
1
Figure 3.6 External Inhibit Interface Circuit
5
S1 S1 Open = Interlock Open
for remote
Remove jumper S1 Closed = Interlock Closed
external interlock
External Safety
Interlock Control
2
JB1
It is recommemded to use relay contacts for S1. The relay
1
should be located as close as possible to the power supply.
Signals are ~15Vdc, 25mA max and are only to be used
for contact closure.
All cables should be shielded with the shields being returned
to chassis ground of the High Voltage Power Supply.
3
4
Figure 3.7 External Interlock Interface