Spellman DXM100 Series Instruction Manual

Instruction Manual

MODEL :
SERIAL# :
DATE :

SPELLMAN
HIGH VOLTAGE ELECTRONICS
CORPORATION

475 Wireless Blvd.
Hauppauge, New York, 11788

[phone]*FAX: [phone]*
E-mail: [e-mail]
Website: www.spellmanhv.com

DXM100 SERIES

High Voltage Power Supply

R

DXM100 SERIES MANUAL 118146-001 Rev A

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.

SERVICESICHERHEIT

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.

118004-001 REV. B

PRECAUTIONS IMPORTANTES POUR VOTRE SECURITE

CONSIGNES DE SÉCURITÉ

CETTE ALIMENTATION GÉNÈRE DES TENSIONS QUI SONT DANGEUREUSES ET PEUVENT ÊTRE FATALES.

OYEZ EXTRÊMENT VIGILANTS LORSQUE VOUS UTILISEZ CET ÉQUIPEMENT.

S

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.

CONSIGNES DE SÉCURITÉ EN CAS DE REPARATION

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.

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

Table of Contents

1. INTRODUCTION

1.1 Description of the DXM100 Series ......................................................................1

1.2 Standard Features .................................................................................................1

1.3 System Status and Fault Diagnostic Display .......................................................2

1.4 Interpreting the Model Number ...........................................................................2

1.5 High Voltage Connector Pin out Diagram ...........................................................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 .................................................................................................7

4. PRINCIPLES OF OPERATION

4.1 AC to DC Rectifier and Associated Circuits .......................................................13

4.2 High Frequency Inverter ......................................................................................13

PAGE

4.3 High Voltage Circuits ..........................................................................................13

4.4 Control Circuits ....................................................................................................14

4.5 Options .................................................................................................................14

5. OPTIONS

5.7 Custom Designed Models ....................................................................................15

5.8 Filament ..............................................................................................................15

6. MAINTENANCE

6.1 Periodic Servicing ................................................................................................16

6.2 Performance Test .................................................................................................16

6.3 High Voltage Dividers .........................................................................................16

7. FACTORY SERVICE

7.1 Warranty Repairs .................................................................................................17

7.2 Factory Service Procedures ..................................................................................17

7.3 Ordering Options and Modifications ...................................................................17

7.4 Shipping Instructions ...........................................................................................17

APPENDIX

A. Specification Controls (Custom Models Only)

DXM100 MANUAL i 118147-001 Rev. D

LOCAL Operating Features

T

Chapter 1

INTRODUCTION

1.1 Description of the DXM100
Series

he DXM100 Series of X-ray generator module is
designed for OEM applications up to 100kV and

1200 watts. Its universal input, small package size
and choice of three standard digital interfaces simplifies
integrating the DX M100 into your X-ray analysis system.
Models have a floating filament (negative HV polarity)
based X-ray tube designs. DSP based emission control
circuitry provides excellent regulation of emission current,
along with outstanding stability performance.

The dramatically reduced size of the DXM100 Module,
compared to traditional high voltage modules, is obtained
by a state of the art off-line resonant converter. The
resonant converter utilizes a unique control scheme, which
allows constant frequency operation while maintaining
high efficiency. T he high efficiency is obtained by zero
current switching (ZCS) resonant control . High operating
frequency, typically 50kHz, allows for low ripple and
excellent dynamic response capabilities.

The DC output voltage and current are controllable over
the full range of operation. Monitoring and control
signals are provided for simple, yet flexible control of the
power supply. The DXM100 series operates 180 –
264vac, at 50/60 Hz single phase. The input power factor
corrected. The DXM100 series operates at full power
continuous. The ambient temperature must be kept below
the maximum rating as specified in 1.2. The standard
warranty applies to the modules. Consult factory about
the warranty for custom DXM100 modules.

IMPORTANT

This control signal in not a safety

interlock and should not be used for

protection from high voltage generation

for safety purposes.

(1) Output Control: Voltage, current filament limit

and preheat level are externally programmable over
the entire range from zero to maximum rating via 0­10VDC input.

(2) +10VDC Reference: A +10VDC reference is

provided for local programming via two
potentiometers to be used to adjust filament limit and
preheat level.

(3) High Voltage Enable: A hardware based, dry

contact closure will enable the power supply into the
high voltage on mode. .

1.2 Standard Features

The DXM100 series incorporates several standard
features designed to optimize user operation.

Slow Start: Provides a gr adual increa s e in high voltage
output until the maximum set point is reached. The
standard ramp time is 5 seconds. Various slow start times
can be accommodated. Consult Spellman’s Sales
Department for information on slow start options.
If a fault occurs, the power supply will revert to the
Shutdown mode indica ted by extinguishing of X-ray ON
LED and the via RS-232 as HV OFF. To reset a fault, a
clear command followed by HV ON command must be
sent via RS-232.

Power Facto r and Universal Input: The input voltage
of the DXM100 can operate within the range from 180 –
264vac. The power factor is actively corrected across this
entire range and is better than 0.99 at full load.

Internal EMI Filter and Fuse Protection: An internal
EMI filter and fuse provide protection against line voltage
surges and po wer s upply faults.

Remote Operating Features

Remote Control: USB, Ethernet and RS232 are standard.
A provided G.U.I allow user to control the unit via RS232
and USB interfaces. An imbedded Applet web Brower allow
user to control the unit via Ethernet. Refer to DXM100
Digital Protocol spec for Details.

Remote Monitor: Allows remote monitoring of the
Output voltage, current, filament limit, preheat level and
total HV On clock counter via the USB, Ethernet or RS232.

DXM100 MANUAL 1 118147-001 Rev. D

Remote Programming: Allows remote programming of
the Output vol tage, current, filament limit and preheat level
via the USB, Ethernet or R S232.

X-ray Enable/Interlock: In local mode, allows remote
ON/OFF contr ol of the high vol tage. In remot e mode, the
hardware based dry contact closure must be closed in
order to enable the high voltage via the USB, Ether net or
RS232.

1.3 System Status and Fault

Diagnostic Displ a y

If a fault occurs, the power supply will revert to the
Shutdown mode indica ted by extinguishing of X-ray ON
led and via RS-232 as HV OFF. T o reset a fault in local
mode the enable must be reset. To reset a fault in remote
mode a HV ON command must be sent via the RS-232,
USB or Ethernet.

• OVER CURRENT FAULT: Indicates the over

current protection circuitry has caused the high

voltage to turn off. This fault will occur if the output

current exceeds 110% of full scale or 110% of current

program value. This fault is indicated by illumination

of over curr ent led status on the front cove r and via

RS-232, USB or Ethernet as Over Current.

• OVERVOLTAGE: Indicates the over voltage

protection circuitry has caused the high voltage to

turn off. This fault will occur if the output voltage

exceeds 110% of full scale or 110% of program

value. This fault is indicated by over voltage led

status on the front c over and vi a the RS-232, USB or

Ethernet as Over voltage.

• ARC FAULT: Indicates that an arc has occurred.

When a single arc occurs, the high voltage will be

quenched for 150ms and the Arc Fault led will

illuminate for 1 second and be r epo rted via the digital

interface for 1 second as arc fault. If 4 arcs occur

within 10 seconds a HVPS fault will occur and the

HVPS will be shutdown. This fault is indicated by

illumination of Arc Fault led status on front cover and

via RS-232, USB or Ethernet as arc fault.

• UNDER VOLTAGE: Indicates a failure in the

voltage regulation circuitry. This fault occurs when

there is a lack of output power to maintain regulation

and will result in shutdown of the HV. This fault will

occur if the output voltage less than 10% below the

program value. This fault is indica ted by illumination

of under volta ge led status o n the front cover and via

RS-232, USB or Ethernet a s under voltage.

• UNDER CURENT: Indicates failure in the current

regulation circuitry. This fault occurs when the
allowable percentage of error between actual and
programmed emission current is exceeded. This fault
will not cause a shutdown of the HV. This fault will
occur if the output current less than 10% below the
program value. This fault is indicated by illumination
of under curr ent led status on fr ont co ver and via RS­232, USB or Ethernet as under current.

• OVER TEMPERATUR E: Indicates either a failure

in the cooling system that would cause the internal
heat sink temperature to exceed it’s operating range
or the ambient temperature to exceed 40degC,
resulting in shutdown of HV. This fault is indicated
by over temperature led status on the front cover and
via RS-232, USB or Ethernet as over temperature.

• Filament Protection: If the output voltage goes

below 30% of full rating the filament power will be
disable to protect the filament in the users X-ray tube,
but the filament preheat will still be active. This will
cause an undercurrent fault.

• PS Fault Indication: PS Faults an open collector

output with a 1k ohm series impedance on J2-1,
indicates that a fault has occurred. High = no faults

• X-ray On Indication: X-ray On Signal is an open

collector output a 1k ohm series impedance on J2-14,
indicates X-ray status. High = X-ray Off, Low =X ­ray On

• X-ray On LED: when the high voltage status is

“On” state it is indicate d by X-RAY ON led status on
the front cover

• Power On LED: when the input power is applied to

the unit it is indicated by PWR ON led status on the
front cover

1.4 Interpreting the Model Number:

The model number of the power supply describes its
capabilities. After the series name is:

(1) The maximum voltage in kilo volts.
(2) The polarity of the output – positive (P), or

negative (N).

(3) The maximum output in watts.
(4) Custom “X” number representing details listed in

a separate specification control drawing.

DXM100 MANUAL 2 118147-001 Rev. D

• POWER LIMIT FAULT: Indicates the po wer limit

protection circuitry has caused the high voltage to

turn off. This fault will occur if the output power

exceeds 105% of programmed value. This fault is

indicated by illumination of both the over voltage and

under voltage led status on the front cover and via

RS-232, USB or Ethernet as Power limit. This is

maximum power limit that can be set 0-1200 watts

via the digital interface. This value is stored in HVPS

memory.

Figure 1.1 LED Legend

DXM100 – NEGATIVE POLARITY

DXM100 MANUAL 3 118147-001 Rev. D

Chapter 2

I

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 Ins t ructions.

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 unpacki ng, inspect the pa nel and chassis
for visible damage.

Fill out and mail the Warranty Registration card
accompanying the unit. Standard DXM100 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

The DXM100 series module power supplies are
designed for installation into existing or newly
developed OEM equipment. The power supply
can also easily fit into bench top applications or
test set requirements. Standard unit dimensions
are shown in Figure 2 .1

For custom mounting requirements or specific
package size requirements consult Spellman’s
Sales Department. Spellman has many package
designs available, or can design a specific
enclosure for your requirements.

The DXM100 serie s utilizes solid encapsulations
for corona free operation. No periodic
maintenance is required.

DXM100 MANUAL 4 118147-001 Rev. D

Figure 2.1 Unit Dimensions

DXM100 MANUAL 5 118147-001 Rev. D

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.

IMPORTANT:

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 F is reached.

Failure to follow these procedures may void

the warranty.

A) Insure that the high voltage cable is properly
greased and installed in accordance to the High
voltage cable manufacturer instructions and terminated

to the load. Insure that all circuits connected to the high
voltage output are safely interlocked against accidental
contact. Insure external load is discharged.

B) Check the input voltage rating on the serial
nameplate of the supply and make certain that this is the
rating of the available power source

C) PROPER GROUNDING TECHNIQUE: The
chassis of high volta ge power supp lies must be grounded,
preferably to a water system ground using copper pipe or
other earth gr ound . A gro und stud is p rovi ded on the front
panel .See Figure 3.1 for a typical operating setup. The
return line from the load should be connected to the power
supply chassis. Using a separate external ground at the
load is not recommended. An IEC 320 connector is
provided for connection to the line voltage source. A
standard line cord is also provided.

D) Hook-up: Connect control and monitoring
connections as described in this manual.

E) For initial turn-on, program the voltage and
current for zero output. Connect the enable/disable signal
to disable.

F) The input power cable may now be connected to
the AC power line.

G) Enable the power supply via the enable/disable
hardware based, dry contact closure.

H) Slo wly progra m the outp ut vol tage a nd cur rent to
desired level. Monitor the output voltage and curr ent via
the monitoring test points. Note equipment operation is
normal, i.e. Load is behaving as predicted.

I) To turn high voltage off, use the enable/disable
signal. If equipment is to be kept off for extended
periods, disconnect power supply from line voltage
source.

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 VOLTAGE MONITOR 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. DO NOT ATTEMPT TO ACCESS OR REPAIR

ANY INTERNAL CIRCUITS. DANGEROUS AND

LETHAL VOLTAGES ARE GENERATED INSIDE

THE MODULE.

DXM100 MANUAL 6 118147-001 Rev. D

Figure 3.1 Proper Grounding Technique

3.1.1 X-ray Tube Operation

The X-ray tube should be operated according to the X-ray
manufacturers specifications. Filament Limit program
and Filament Preheat program shall be set so not to
exceed maximum filament current as per the X-ray tube
manufacturers specifications. X-ray tube seasoning
schedules and kV ramp profiles should also be per the X­ray tube manufacturers specification.

Set Filament Limit: One of the most critical settings is the
Filament Limit adjustment. The Filament Limit set point
limits that maximum output current of the filament power
supply to protect the filament of the X-Ray tube. This
setting will make it impossible for the X-Ray generator to
exceed this value under any circumstance. It should be set
at or below the X-Ray tube manufacturer’s specification.

Filament Limit program scaling is 0 to 10Vdc = 0 to 5
amps.

When setting the Filament Limit below the maximum X­Ray tube specification, the Filament Limit should be 10­15% higher than the filament current required to achieve
the maximum programmed emission current (mA) at the
lowest kV setting to be used. Remember, filament
maximum values are different than the REQUIRED values
for emission. Setting 10-15% over the needed emission
current values provides headroom as well as better trainset
response characteristics.

Always keep the Filament Limit level at or below the
manufacturers recommended maximum filament
current specification.

Set Filament Standby (Preheat): The Filament Standby
current (referred to as Filament Preheat on some product
lines) is the idle current supplied to the X-Ray tube
filament during X-Ray Standby (HV OFF/X-Ray
disabled) conditions.

Filament Standby programing scaling is 0 to 10Vdc = 0 to

2.5 amps.

The Filament Preheat set point is typically around 1 amp
to 2 amps, but the X-Ray tube manufacturer should be
consulted. A good guideline to consider is the maximum
Filament Preheat level should be limited to 50% of the
Filament Limit specification. It is perfectly fine to set
standby current to zero if fast emission current ramping is
not required.

For additional information please visit this link

.

3.2 Standard Features

A note on remote interface circuitry and remote signal
grounding: whenever possible, electrical isolation should
be provi d ed when int er fac ing with any high vol ta ge p o wer

DXM100 MANUAL 7 118147-001 Rev. D

supply. For enable/disable signal connections, an isolated
relay or optocoupler should be used. For PS Fault
indication an optocoupler 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 or power supply
chassis ground

Local Programming potentiometers: The filament limit
and preheat level controls on the front panel can be used
as follows: For local filament limit control, jump J2-4 to
J2-5. For local preheat control, jump J2-6 to J2-7. See
Figure 3.2.

REMOTE PROGRAMMING:
After establishing co mmunication with the UUT as pe r

the DXM100 Digital Protocol spec. Switch the UUT to

Remote Mode by sending a Program Local/Remote Mode
command. If the unit is in Local Mode and enabled prior
to switching it to Remote Mode, the UUT will shutdown
and a P.S Fault indictor will occur when it is switch to
Remote Mode. A clear command can be sent to clear this
fault.

Remote Control: USB, Ethernet and RS232 are standard
Refer to DXM100 Digital Protocol spec for Details.

Remote Monitor: Allows remote monitoring of the
Output volta ge, current, filament limit and preheat level via
the USB, Ethernet or RS 232.

LOCAL PROGRAMMING: Allows local adjustment
of the output voltage, current filament limit and preheat
level via an external voltage source. 0-10VDC signal is
supplied to pin 3 of the J2 for voltage programming and 0­10 VDC signal is supplied to Pin 2 J2 for current
programming. 0-10VDC signal is supplied to pin 4 of the
J2 for filament limit programming. 0-10VDC signal is
supplied to pin 6 of the J2 for filament preheat
programming (2.5 a max). Pr ogra mming signals should be
referenced to Pi n 9 of J 2, signal ground. By adjust ing the
voltage source from 0 volts (zero output) to 10 volts (full
rated output) the desired output can be selected. See
Figure 3.3 for wiring diagram and specifications.

Local Monitoring: Monitor outputs are made available
for monitoring the voltage, current output and filament
preheat level. The Monitor outputs are always positive
regardless of the output polarity, where zero (0) to 10 (10)
volts equals 0-100% of output. See Figure 3.4 for
monitoring wiring and see data sheet for pin outs.

X-RAY Enable/Interlock: In Local Mode allows
ON/OFF cont rol of the high voltage. The hardware based
dry contact closure must be closed in to enable the high
voltage. In Remote Mode this I/O acts as an Interlock.
The hardware based dry contact closure must be closed in
order t o enable the high vol tage via the USB , Ethernet or
RS232. This can be done by connecting pins 11 and 12
on J2. See Figure 3.5.

Remote Programming: Allows remote programming o f
the Output vol tage, curre nt, filament limit and preheat level
via the USB, Ethernet or R S232.

DXM100 MANUAL 8 118147-001 Rev. D

WARNING

It is extremely dangerous to use this

circuit to inhibit high voltage generation

for the purpose of servicing or

approaching any area of load

considered unsafe during normal use.

Figure 3.2 Local Programming Via Internal Front Panel Pot Voltage Source.

DXM100 MANUAL 9 118147-001 Rev. D

Figure 3.3 Local Programming Via External Voltage Source

DXM100 MANUAL 10 118147-001 Rev. D

Figure 3.4 Remote Monitoring

DXM100 MANUAL 11 118147-001 Rev. D

RELAY

Figure 3.5 Enable/Interlock Logic Control

DXM100 MANUAL 12 118147-001 Rev. D

Chapter 4

T

PRINCIPLES OF OPERATION

he DXM100 Series of high voltage power supplies

utilizes sophisticated power conversion technology.

Advanced analog and power conversion techniques
are used in the DXM100 series. The intention of the
Principles o f Operation is to introduce the basic function
blocks that comprise the DXM100 power supply. For
details on a specific circuit, consult Spellman’s
Engineering Department.

The DXM100 power supply is basically an AC to DC
power converter. Within the power supply, conversions
of AC to DC then to high frequency AC, then to high
voltage DC take place.

Typical DXM100 power supplies comprise a few basic
building blocks. These are: 1) AC to DC rectifier, 2)
Power Factor correction boo st circuitry 3) High frequency
quasi-resonant inverter, 4) High voltage transformer and
rectifier circuits, and 5) Contro l and monitoring circuits.
The following is a brief description of each building
block.

4.1 Power Factor and Associated
Circuits

The DXM100 series can operate from 180 - 265VAC.
The input voltage is connected via a typical IEC 320 type
input connec tor. An inte rnal EMI filter and fuse housing
is an integral part of the DXM100 module. The input
circuits actively correct the power factor.

The input line voltage is applied to a current limit device
to reduce the initial inrush current. The input line voltage
is converted to a 400VDC voltage via an active PFC
Converter.

WARNING

The energy levels used and generated by the

power supply can be lethal! Do not attempt to

operate the power supply unless the user has a

sufficient knowledge of the danger s and hazards

of working with high voltage. Do not attempt to

approach or touch any internal or external

circuits or components that are connected or

have been connected to the power supply. Be

certain to discharge any stored energy that may

be present before and after the power supply is

used. Consult IEEE recommended practices for

safety in high voltage testing #510-1983.

4.2 High Frequency Inverter

The DXM100 is a resonant converter operating in a zero
current switching, series resonant, parallel loaded
topology. MOSFET transistors switch the 400 VDC
voltage to the resonant tank circuit. Typical operating
frequency is in the range of 35-65kHz depending on
model. Control of the resonant circuit output is done by
the low voltage control circuits, and are isolated by an
isolated pulse transformer. The output of the resonant
circuit is applied to the primary of the high voltage
transformer.

4.3 High Voltage Circuits

The high voltage transformer is a step-up type. The
secondary of the high voltage transformer is connected to
the high voltage rectifier circuit. The rectifier circuit will
vary depending up on the rated output voltage. For lower
power a half wave Cockroft-Walton multiplier is used, for
higher power a full wave Cockroft-Walton multiplier is
used. A feedback signal is generated by the high voltage
resistor divider. This feedback signal is sent to control
circuits to provide voltage regulation and monitoring. A
current sense resistor is connected at the low voltage end
of the rectifier circuit. The circuit sense signal is sent to
the control circuits to provide current regulation and
monitoring.

The high voltage rectifier output is connected to the
output limiting resistors. These resistors limit the peak
surge current in the event an arc or discharge occurs. The
limiting resistor output is connected to the output
connector provided.

DXM100 MANUAL 13 118147-001 Rev. D

4.4 Cont rol Circuits

Control circuits are used for regulation, monitoring, pul se­width, control, slow-start and inhibit control. Feedback
signals are calibrated and buffered via general purpose
OP-AMPS. Pulse width control is accomplished by a
typical PWM type control I.C. Logic enable/disable is
provided by a logic gate I.C. Regulators generate +/- 15V
and 10VDC. DSP based control circuitry provides
excellent regulation, along with outstanding stability
performance

WARNING

LINE VOLTAGE IS PRESENT

WHENEVER THE POWER SUPPLY IS

CONNECTED TO EXTERNAL LINE

VOLTAGES. BE SURE TO DISCONNECT

THE LINE CORD BEFORE OPENING T HE

UNIT. ALLOW 5 MINUTES FOR

INTERNAL CAPACITANCE TO

DISCHARGE BEFORE REMOVING ANY

COVER.

4.5 Options

Due to the variations of models and options provided in
the DXM100 series, details of actual circuits used may
differ slightly from above descriptions. Consult
Spellman’s Engineering Department for questions
regarding the principles of operations for the DXM100
series.

DXM100 MANUAL 14 118147-001 Rev. D

T

Chapter 5

OPTIONS

He options available for this power supply are

described in this section. Interface diagrams are

shown where required. Options are specified by
including the option code in the model number as
described in Section 1.4.

5.1 Custom Designed Models X (#)

Units built to customer specifications are assigned an X
number be the factory. If this unit is an X model,
specification control sheet is added at the end of this
instruction manual.

5.2 Filament

Filament outputs with an emission control loop are
available for use with X-ray tubes. Generally, filament
outputs are in the range of 3V – 10V, at currents up to 5A.
A floating AC filament is provided. The filament on a
standard DXM100 Module is calibrated to 5a@10V using
either a 10ft High Voltage .

Spellman welcomes the opportunity to tailor units to fit
your requirements or to develop new products for your
applications. Contact Spellman Sales Department.

Note: Before operating this system, refer to operating
instructions in Chapter 3.

DXM100 MANUAL 15 118147-001 Rev. D

Chapter 6

T

WARNING

WARNING

MAINTENANCE

his section describes periodic servicing and

performance testing procedures.

THIS POWER SUPPLY GENERATES VOLTAGES

THAT ARE DANGEROUS AND MAY BE FATAL.

OBSERVE EXTREME CAUTION WHEN WORKING

WITH HIGH VOLTAGE.

6.1 Periodic Servicing

Approximately once a year (more often in high dust
environments), disconnect the power to the unit. Use
compressed air to blow dust out of the inside of the unit.
Avoid touching or handling the high voltage assembly.

High Voltage Cable Plug/Receptacle should be greased
and maintained in accordance to the High voltage
cable manufacturer instructions.

6.2 Performance Test

High voltage test procedures are described in Bulletin
STP-783, Standard Test Procedures for High Voltage
Power Supplies. Copies can be obtained from the
Spellman Customer Service Department. Test equipment,
including an oscilloscope, a high impedance voltmeter,
and a high vol ta ge d ivi de r such a s the Sp el lman HV D-100
or HVD-200, is needed for performance tests. All test
components must be rated for operating voltage.

6.3 High Voltage Dividers

High voltage dividers for precise measurements of output
voltage with an accuracy up to 0.1% are available from
Spellman. The HVD-100 is used for voltages up to
100KV. The HVD-200 measures up to 200KV. The
Spellman divider is designed for use with differential
voltmeters or high impedance digital voltmeters. The high
input impedanc e is ideal for measuring hi gh voltage low
current sources, which would be overloaded by traditional
lower impedance dividers.

HIGH VOLTAGE IS DANGEROUS.

ONLY QUALIFIED PERSONNEL SHOULD

PERFORM THESE TESTS.

DXM100 MANUAL 16 118147-001 Rev. D

Chapter 7

FACTORY SERVICE

7.1 Warranty Repairs

During the Warranty period, Spellman will repair all units
free of charge. The Warranty is void if the unit is worked
on by other than Spellman personnel. See the Warranty in
the rear of this manual for more information. Follow the
return procedures described in Section 7.2. The customer
shall pay for shipping to and from Spellman.

7.2 Factory Service Procedures

Spellman has a well-equipped factory repair department.
If a unit is returned to the facto ry for calibration o r repair ,
a detailed description of the specific problem should be
attached.

For all units returned for repair, please obtain an
authorization to ship from the Customer Service
Department, either by phone or mail prior to shipping.
When you call, please state the model and serial numbers,
which are on the plate on the rear of the power supply,
and the purchase order number for the repair. A Return
Material Authorization Code Number (RMA Number) is
needed for all returns. This RMA Number should be
marked clearly on the outside of the shipping container.
Packages received without an RMA Number will be
returned to the customer. The Customer shall pay for
shipping to and from Spellman.

A preliminary estimate for repairs will be given by phone
by Customer Service. A purchase order for this amount is
requested upon issuance of the RMA Number. A more
detailed estimate will be made when the power supply is
received at the Spellman Repair Center. In the event that
repair work is extensive, Spellman will call to seek
additional authorization from your company before
completing the repairs.

7.3 Ordering O pt ions and
Modifications

Many of the options listed in Chapter 5 can be retrofitted
into Spellman power supplies by our factory. For prices
and arrangements, contact our Sales Department.

7.4 Shipping Inst ructions

All power supplies returned to Spellman must be sent
shipping prepaid. Pack the units carefully and securely in
a suitable container, preferably in the original container, if
available. The power supply should be surrounded by at
least four inches of shock absorbing material. Please
return all associated materials, i.e. high voltage output
cables, interconnection cables, etc., so that we can
examine and test the entire system.

All correspondence and phone calls should be directed to:
Spellman High Voltage Electronics Corp.

475 Wireless Boulevard
Hauppauge, New York 11788
TEL: [phone] FAX: [phone]
E-Mail: [e-mail]
http://www.spellmanhv.com

DXM100 MANUAL 17 118147-001 REV. D

To obtain information on Spellman’s product warranty please visit our website at:

http://www.spellmanhv.com/en/About/Warranty.aspx

DXM100 Digital Interface

Manual

Ethernet

Serial – RS-232

Universal Serial Bus - USB

Copyright  2013, 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.

118142-001 Rev B

475 Wireless Boulevard • Hauppauge, New York 11788, USA • www.spellmanhv.com • T:+1 631.630.3000 • F:+1 631.435.1620

Table Of Contents

1.0 Scope ....................................................................................................................... 3

2.0 Functional Description ........................................................................................... 3

3.0 Getting Started - Interface Wiring and Pin-outs ................................................... 3

3.1 RS232 Interface .................................................................................................................... 3

3.2 Ethernet Interface .................................................................................................................. 5

3.3 Universal Serial Bus Interface .............................................................................................. 6

3.4 RS-232 Cabling ..................................................................................................................... 6

3.5 Ethernet Cabling ................................................................................................................... 6

3.6 USB Cabling ......................................................................................................................... 8

4.0 Getting Started - Software .................................................................................... 10

4.1 RS-232 ................................................................................................................................ 10

4.2 Ethernet ............................................................................................................................... 12

4.3 USB ..................................................................................................................................... 31

5.0 Ethernet Commands ............................................................................................. 39

5.1 TCP/IP Format .................................................................................................................... 39

5.2 Command Arguments ......................................................................................................... 40

5.3 Command Overview ........................................................................................................... 40

5.4 Response Overview ............................................................................................................ 41

5.5 Command Structure ............................................................................................................ 43

6.0 Serial Commands – RS-232 / USB ....................................................................... 73

6.1 Serial Interface Protocol ..................................................................................................... 73

6.2 Command Arguments ......................................................................................................... 73

6.3 Checksums .......................................................................................................................... 73

6.4 Command Overview ........................................................................................................... 75

6.5 Response Overview ............................................................................................................ 76

6.6 Command Structure ............................................................................................................ 78

6.7 Spellman Test Commands ................................................................................................ 103

6.8 Serial Command Handling ................................................................................................ 104

118142-001 Rev B Page 2 of 104

WARNING

THIS EQUIPMENT GENERATES DANGEROUS VOLTAGES THAT MAY BE FATAL.

PROPER GROUNDING OF ALL HIGH VOLTAGE EQUIPMENT IS ESSENTIAL.SEE DXM100

OWNERS MANUAL FOR PROPER GROUNDING TECHNIQUE AND SAFETY

PRECAUTIONS BEFORE APPLING AC INPUT POWER TO THE DXM100 UNIT.

TO PREVENT DAMAGE TO THE HOST COMPUTER THE COMPUTER SHOULD BE

GROUNDED TO THE SAME GROUND AS THE UUT.

1.0 SCOPE

This document applies to the communications interfaces on the DXM100 ,
assembly 460188.

2.0 FUNCTIONAL DESCRIPTION

The DXM100 provides 3 different types of digital communications interfaces:

 RS-232 on J3
 Ethernet (10/100-Base-T) on J5
 Universal Serial Bus on J4.

3.0 GETTING STARTED - INTERFACE WIRING AND PIN-OUTS

3.1 RS232 INTERFACE

The RS232C interface has the following attributes:

 115K bits per second
 No Parity
 8 Data Bits
 1 Stop Bit
 No handshaking
 DB-9 connector as shown

118142-001 Rev B Page 3 of 104

Figure 1 – J3, RS-232 DB-9M pinout (front view)

PIN DESCRIPTION

1 ­2 Tx Out
3 Rx In
4 ­5 Ground
6 ­7 ­8 ­9 -

118142-001 Rev B Page 4 of 104

3.2 ETHERNET INTERFACE

The Ethernet interface has the following attributes:

 10/100-Base-T
 IP address can be set by the system integrator
 Network Mask can be set by the system integrator
 TCP Port Number can be set by the system integrator
 RJ-45 connector
 Network attachment via Crossover and Standard Ethernet cables.
 Supported Operating Systems: Windows 98 2ED, Windows 2000

(SP2), Windows NT (SP6), Windows XP Professional

LED 1 LED 2

Figure 2 – J5, Ethernet RJ45 Jack (front view)

PIN DESCRIPTION

1 TX+
2 TX­3 RX+
4 ­5 ­6 RX­7 ­8 -

The Ethernet RJ-45 has two LED indicators, as shown in Figure 2. The left
LED, LED1 indicates that the network processor has a valid network link.
The right LED, LED2 indicates network activity.

8 7 6 5 4 3 2 1

118142-001 Rev B Page 5 of 104

3.3 USB – UNIVERSAL SERIAL BUS INTERFACE

The USB interface has the following attributes:

 Compliant with USB 1.1 and USB 2.0 specifications
 Type B male connector
 Included driver can be communicated with via standard Windows

serial communications methods

Figure 3 – J4, USB Type B (front view)

PIN DESCRIPTION

1 Vbus +5V
2 D­3 D+
4 Ground

3.4 RS-232 CABLING

A standard shielded RS-232 cable is used to connect the DXM100 serial
port to the serial port on a standard personal computer. Please refer to the
following chart.

PC Connector (DB-9 Female)
Pin 2: RX In Pin 2: TX Out

Pin 3: TX Out Pin 3: RX In
Pin 5: Ground Pin 5: Ground

PC to DXM100 Board Cable Details

3.5 ETHERNET CABLING

Shielded Category 5 (CAT5) Ethernet patch cables are used to connect
the DXM100 to the host computer. There are two ways to connect to the
DXM100 board via Ethernet: the first is to directly cable between the host
and the DXM100 board, and the second is through the use of a switch,
hub, or network.

DXM100 Connector (DB-9
Male)

118142-001 Rev B Page 6 of 104