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

A direct connection requires a non-standard cable where the wires are not
run straight through. Please refer to the two cable ends shown below in
figure 4.

Figure 4 – Crossover Cable for Direct Connection

A standard connection through a hub, switch, or network uses a standard
CAT5 patch cable. Please refer to the two cable ends shown below in
figure 5.

Figure 5 – Standard Straight Through Cable – Standard CAT5 Patch

118142-001 Rev B Page 7 of 104

3.6 USB CABLING

A high-quality double shielded USB 2.0 Type A to B (host to slave) cable
should be used in all applications. This type of cable is a standard PC to
peripheral cable that utilizes full-size connectors.

Figure 6 – USB A-to-B cable

3.6.1 HIGH EMI ENVIRONMENTS

If the DXM100 USB interface is being used in a high-EMI environment,
ferrites should be added to the USB cable. Figure 7 illustrates the possible
combinations of ferrites that can be used to achieve acceptable operation
under these conditions.

POW ER SUPPLY

WITH

USB

FERRITE

CORE

(cable)

24 V DC

FERRITE

BEAD

(cable)

FERRITE

CORE
(cable)

FERRITE

CORE
(cable)

USB CABLE

FERRITE

BEAD

(cable)

PC

WITH

USB

118142-001 Rev B Page 8 of 104

Figure 7 – Block Diagram of USB Cable Utilizing Ferrites
Ferrite beads should be attached to the USB cable next to the connectors
– both sides should be installed. In extreme cases ferrite cores may be
added where the cable is looped 3 or 4 times around the core as shown in
figure 8. Cores of 1.5 to 2 inches should be used at both ends of the
cable.

Figure 8 - Example of a USB Cable Using Ferrites

Please refer to the USB Interface Setup section, for an explanation of how
USB works and why EMI may present a problem for this communications
interface.

118142-001 Rev B Page 9 of 104

4.0 GETTING STARTED – SOFTWARE

The following sections detail how to create software to interface to the DXM100
communications interfaces.

4.1 RS-232

The RS-232 interface makes use of a standard ‘command/response’
communications protocol. See section 6.0 for the syntax of the serial
interface protocol. The programmer should also review section 4.3 for
programming considerations for the USB interface as the code is nearly
identical for the RS-232 interface.

All software that addresses the RS-232 interface must adhere to the
following parameters:

 A default Baud rate of 115.2K bps
 No Parity
 8 Data Bits
 1 Stop Bit
 No handshaking

The Baud rate can be changed to 115.2K ,57.6k,38.4k,19.2k or 9600 bps
and stored in the unit.

4.1.1 Enabling Communications Objects in Visual Basic for RS-232

Communications in Microsoft Visual Basic 6.0 are directed to a control
that abstracts the port. In the case of serial and USB we need
Microsoft Comm Control 6.0. To enable this in your VB 6 project, go to:

Project -> Components

Then in the list make sure that Microsoft Comm Control 6.0 has a
check next to it. The Comm Control Object should then appear in your
toolbox. It will have an icon of a telephone and will be named:
MSComm. This can be dragged and dropped into your application.
You will then need to set the object’s properties.

4.1.2 Configuring Communications in Visual Basic for RS-232

In order to configure the MSComm Object, first you must initialize it
in the Object properties:

Settings 115200,n,8,1
Handshaking 0 – comNone

The application can be set to either default to a specific COM Port
or the End User can be allowed to choose one for the particular PC.

118142-001 Rev B Page 10 of 104

For the “Default” scenario, include the following commands in the
Form_Load() routine:

MSComm1.CommPort = portNumber

MSComm1.PortOpen = True

For the “Choice” scenario, place the above two commands in a
selectable menu item.

118142-001 Rev B Page 11 of 104

4.2 ETHERNET

The DXM100 contains an embedded diagnostic web server that can be
accessed through any standard web browser by browsing to the
DXM100’s IP address. For example:

http://192.168.1.4

The Ethernet interface communicates using the following protocols:

 TCP/IP
 HTTP
 TFTP
 FTP

4.2.1 Diagnostic Web Server

The diagnostic web server can control and monitor a DXM100 equiped
power supply from a web browser. It displays operating status of the
Power Supply and allows the unit to be configured in real time. The
application consists of three web pages; a page displaying contact
information, a license agreement, and a monitoring and control applet that
is at the heart of this application. The Web Server application for the
DXM100 is presented as an example in the following pages.

4.2.2 Web Pages

4.2.2.1 Web Page 1: Contact Information Page

Figure 9 displays a picture of the DXM100N1200 and information
on how to contact Spellman High Voltage Electronics Corporation.
By clicking on the picture of the DXM100N1200 or on the button
labeled “Click Here to Monitor and Control” one can move on to the
next screen, the license agreement.

118142-001 Rev B Page 12 of 104

Figure 9 - Web Page 1- Contact Information

118142-001 Rev B Page 13 of 104

4.2.2.2 Web Page 2: License Agreement Page

Figure 10 displays the license agreement. Here the user can either
agree or disagree with the Spellman license agreement. Click on “I
Accept” to continue on to the applet.

Figure 10 - Web Page 2 – License Agreement

118142-001 Rev B Page 14 of 104

4.2.2.3 Web Page 3 - Monitor and Control Applet

4.2.2.3.1 Requirements

The Monitor and Control Applet is a java “applet” (“small java
application” specifically written to be embedded in a web page and
invoked from a browser) that requires an Internet browser with an
installed JVM (Java Virtual Machine). The Default username and
password for the applet is: Username: admin, Password:
SHV_Applet. We have tested under Internet Explorer 5 and 6,
Microsoft JVM 5 and Sun JVM versions 1.4.1 and 1.4.2.

4.2.2.3.2 Description of Monitor and Control Applet

Figure 11 displays an example of an embedded monitor and
control application.

118142-001 Rev B Page 15 of 104

Figure 11 - Control and Monitor Applet

Broadly one can view the screen as a “left” and a “right” with
the left half containing status values (read backs) read from
the DXM100 and the right half containing the values that are
configurable by the user. Notice that the top of the right half
contains the label “Click to Set”. For any configurable setting
you click on the button to the left of the setting, which brings
up the program set point screen. For example, click on the
button labeled, ‘V’ to set the output voltage set point. Refer
to figure 12.

4.2.2.4 Program Set Point Screen

On the program set point screen (Reference figure 12 there are two
fields: a top field labeld ‘V’ and a bottom field labeled ‘DAC’.

Figure 12 - Program Configurable Values Screen

The top field is the scaled value or real world value, which is the
field the user is going to use most of the time. The bottom field is
the raw digital-to-analog converter (DAC) value that is actually sent
to the DXM100. Enter either the desired set point level in the top
field or the DAC value between 0 and 4095 in the bottom field.

The user can then click Apply to send the set point to the DXM100
and remain in the set point screen, or click OK to send the set point
and close the set point entry window. The Maximum and Zero
buttons will set both fields to the indicated end point value. The
user may also click on Cancel to close the window without sending
any changes.

To reset the Total hour On meter to zero via the Applet a password
is required.The password is “SHV_Reset”

4.2.2.5 Java Warning Messages

You may notice a message at the bottom of all dialog windows that
are displayed from the DXM100 Control and Monitor Applet. The
wording may vary slightly depending on the JVM version but on

118142-001 Rev B Page 16 of 104

some the message is “Warning: Applet Window”. This message is
letting you know that the dialog window was generated by an
applet. The design philosophy for the JVM was for secure
computing so the origins of new windows are supposed to be as
obvious as possible.

4.2.2.6 Menu Item “Settings” on Applet

The user can view and set operating parameters of the applet or
network configurations of the DXM100 or view firmware version
information for both through the settings menu. Click on the button
at the top of the Monitor and Control Applet that has the label
“Settings”. This displays the settings popup menu as shown in
figure 13.

Figure 13 – Settings Pop up Menus

Notice that there are three choices. The first, “Network Settings”
refers to the network settings for the network component of the
DXM100 and not the Monitor and Control applet. The second
option, “Poll Rate” affects refresh rate of the Monitor and Control
Applet and will be discussed in the next section. In the “about”
choice firmware version information is displayed, both for the
Monitor and Control Applet and for the DXM100 hardware.

4.2.2.7 Refresh rate for monitored values

The refresh rate for the applet display of the DXM100 is dependent
upon the rate of placement of status requests in the internal send
queue and how fast responses are sent back from the DXM100 in
response to the requests. The default value for queuing responses
is every 600ms and this is a configurable value in the

Settings->Poll rate screen. Please refer to figure 14.

118142-001 Rev B Page 17 of 104

Figure 14 - Configure Polling Rate Screen

Setting this value lower may make the screen refresh quicker.
However, setting it too low may cause requests to queue up in the
send queue. This may make controlling the DXM100 very slow, as
control requests now must wait behind queued status requests. We
recommend leaving the delay set at the default value.

4.2.2.8 Version Information

118142-001 Rev B Page 18 of 104

Figure 15 – Version Information

4.2.2.9 Turning the DXM100 HVOn/Off and Connection
Status

Please refer to Figure 11, the Monitor and Control Applet.

Setting Name Range Values

Local/Remote Local mode/Remote mode
HV On/Off
Interlock Open/Closed
Fault Status OK/Fault
Connection Status Connected/No Data Received/Disconnected
Unlike the controls we previously discussed at the top of the screen

which required a separate dialog screen to enter values, these are
controlled by a button. For example, an On/Off button controls the
HV. When HV is on, the Control is labeled “Click to Turn HV Off”.
When HV is off, the control is labeled “Click to Turn HV On”.
Thereby handling the two distinct states.

Notice that at the very bottom of the screen is a text field that
displays the current connection status, which as mentioned above
is one of three values. “Connected” is displayed when there exists a
valid TCP/IP session connecting the DXM100 and the Applet and
data is being received by the applet from the DXM100. The next
state is “No Data Received” which is when there is still a valid
connection but no responses have been received from the DXM100
for 2 seconds. Lastly, the text field displays “Disconnected” when
the TCP/IP session has been disconnected.To operate the UUT
using the Computer interface the UUT must be set to Remote Mode
by Clicking “Click to Set Remote.

When the Applet is first started and anytime the “Click To Connect”
button is clicked there is a 5 second delay as the Applet starts up
the threads necessary for communication between it and the
DXM100.

4.2.2 Direct Connection between the DXM100 and a Computer

A direct Ethernet connection between the DXM100 and the
computer requires an RJ45 crossover cable. The end connectors
will look identical to a “normal” RJ45 connector but the colors of
some of the wires in the connectors will be “reversed”. Hold up the
two ends of the RJ45 cable and look at the color of the wires from
left to right. They should differ on the two connectors.

When direct connecting the DXM100 to a computer using a
crossover cable over Ethernet they are essentially participating in a

118142-001 Rev B Page 19 of 104

private network. As such you need to pick two valid IP addresses,
one for each device.

The table below illustrates that not all IP addresses are actually
valid IP addresses. For example, IP addresses beginning with 127
are not valid.

Class Address Range

A 1.0.0.0-126.255.255.255
B 128.0.0.0-191.255.255.255

C 192.0.0.0-223.255.255.255

4.2.2.1 Configuring the Computer for Direct Ethernet
Connection

As mentioned above both the IP Address and Subnet Mask need to
be configured. In our environment computers normally are assigned
IP addresses dynamically, using DHCP. We need to change this
and assign the IP Address statically to the one we have selected.

Here are the steps on Windows XP. On the desktop right click on
“My Network Places” and select properties at the bottom of the
menu.

Figure 16 – Right Click on Desktop

118142-001 Rev B Page 20 of 104

Figure 17 – Select Properties

After selecting properties you are brought up to the screen below
(Figure 18). You must RIGHT CLICK and select Properties on
Local Area Connection, and not double click which will display a
window similar to figure 19.

Figure 18 – Here you must Right Click and Select Properties

118142-001 Rev B Page 21 of 104

Figure 19 – Local Area Connection Properties

Now you must select “Internet Protocol (TCP/IP)” and click on the
Properties button to be brought to figure 20. Lastly you must
disable any firewall software you have running. If you are running a
proxy server for Internet access, you must also disable the proxy
client. Disabling this also requires a reboot.

118142-001 Rev B Page 22 of 104

Figure 20 – TCP/IP Properties

4.2.2.2 Testing a Direct Connection

You can use the program “Ping” to test a network connection
between the computer and the DXM100. “Ping” is a command line
tool so we will need to bring up a command prompt. Under
Windows NT, 2000 and XP the name of this command is “CMD”.
Under Windows 98 the name of this command is “Command”.

To do this, click on Start->Run->Cmd
Then on the command line type
Ping <IP Address>
For example
Ping 192.168.1.4

If the DXM100 is found at the specified IP address, the Ping
command will respond with a report that is similar to:

118142-001 Rev B Page 23 of 104

Pinging 192.168.1.4 with 32 bytes of data:
Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Ping statistics for 192.168.1.4:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

4.2.3 Configuring the DXM100 For a Local Area Network (LAN)

If you have chosen to place the DXM100 onto your local area
network you will need:

 A CAT5 network patch cable to physically connect the

DXM100 to the LAN

 A static IP address to assign to the DXM100.

Remember that even if the IP address you have selected is in
general a valid IP address it needs to be valid for your LAN (local
area network). Otherwise the device will not be accessible from an
Internet browser or Ping.

4.2.3.1 Configuring the Network Settings from the
Monitor and Configure Applet

The network settings are configurable from the Settings->Network
Settings screen, refer to figure 21.

118142-001 Rev B Page 24 of 104

Figure 21 - Configure Network Settings

The settings that can be changed are the:

 Device Name
 IP Address
 TCP Port
 Subnet Mask
 Default Gateway

Once the Apply button is clicked on the network settings screen the
network component of the DXM100 is configured, rebooted and the
applet is disconnected from the DXM100. You must type the NEW
IP address into a web browser to bring up a new instance of the
applet to monitor and control the DXM100 after reconfiguring it.
This may also require reconfiguring the host computer with the
correct host IP address, subnet mask, and TCP port.

The device name does not affect the operation of the DXM100; it is
simply a way for the user to differentiate multiple units on the same
network.

Depending on the type of network you are attaching the DXM100
to, you may need to configure the host PC’s IP address and subnet
mask as shown in section 4.2.2.1. You can also test a network
connection to the DXM100 by following the instructions listed in
section 4.2.2.2.

118142-001 Rev B Page 25 of 104

After the changes are completed. The Apply button is clicked and
the window of Figure 21.1 will pop up. Click OK to start the change
process.

WARNING !

After the OK button is clicked , a confirmation warning window in
Figure 21.2 is shown. Check and record the data in the User
Record Table below. If the desired change is correct click on the
Yes button. Clicking on Cancel will cancel any changes made.

Figure 21.1 – Prompt To Execute Change

Figure 21.2 – Warning Review Screen

User Record Table:

IP Address: _______________________________________

Port Address: _____________________________________

Subnet Mask: _____________________________________

WARNING !

Port address 50000 is reserved for Spellman, attempting to use this
port address will result in the message window Figure 21.3..

118142-001 Rev B Page 26 of 104

Figure 21.3 – Port Error Selection Screen

The TCP/IP Status field in the applet window will show
“Connected – No Data Received as shown in Figure 21.4

Figure 21.4 – TCP/IP Status Field (No Data Received)

118142-001 Rev B Page 27 of 104

Then wait for about a minute for the The TCP/IP Status field in the
applet window to show “Disconnected”as shown in Figure 21.5

Figure 21.5 – TCP/IP Status Field (Disconnected)

At this point recycle the power to the DXM100, and close out all
browser windows on the PC. Then open up a browser again and re­log in to the changed IP address.
Note: Again please remember the changed parameters, as there is
no procedure at this time to recover the default parameters.

4.2.4 Enabling Communications Objects in Visual Basic for Ethernet
Communications

For Ethernet communications, we need Microsoft Winsock Control 6.0 and
SP5. To enable this in your VB 6 project, go to:

Project -> Components

118142-001 Rev B Page 28 of 104

Once selected in your toolbox you will have an icon of two computers
linked together and it will be named: Winsock.This can be dragged and
dropped into your application. Then set the object’s properties.

4.2.5 Configuring Communications in Visual Basic for Ethernet

In order to configure the Winsock Object, you must make the following
initialization in the object’s properties:

Protocol 0 – sckTCPProtocol
Then, in the application code, include the following commands:

tcpClient.RemoteHost = host

tcpClient.RemotePort = portNumber
tcpClient.Connect

For further information regarding the use of the above commands, please
refer to your Visual Studio Help File.

4.2.5.1 Data Output Example

MSComm1 is both the serial and USB port. TcpClient is the
Ethernet port.

If (portType = "ethernet") Then
tcpClient.SendData (str)
Else
MSComm1.InBufferCount = 0
On Error GoTo done
MSComm1.Output = str

done:

tmrOpenClose.Enabled = True

End If

4.2.5.2 Data Input Example

If (portType = "ethernet") Then
Do
DoEvents

tcpClient.GetData temp$

str = str + temp$
Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1
On Error Resume Next
Else
Do
DoEvents
If MSComm1.InBufferCount > 0 Then

118142-001 Rev B Page 29 of 104

str = str & MSComm1.Input
End If
Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1
If InStr(str, Chr(3)) > 0 Then
tmrOpenClose.Enabled = False

End If

End If

118142-001 Rev B Page 30 of 104

4.3 USB

The USB interface makes use of a standard ‘command/response’
communications protocol. See section 6.0 for the syntax of the serial
interface protocol.

The USB interface is accessed through a Windows USB Human Interface
driver (HID).

4.3.1 USB Driver Installation

The HID driver is a Windows driver installed with the operating system. To
determine if the driver had been acquired open the System properties
window selecting the Control Panel System Properties.

Then select Device Manager and expand the Human Interface Devices.
View the properties of the USB Human Interface Device icon and verify
that Spellman USB HID appears in the Location section.

118142-001 Rev B Page 31 of 104

Figure 22 – System Properties

Figure 23 – Device Manager showing USB HID

4.3.2 USB and EMI

The USB protocol utilizes a heartbeat signal from each client device back
to the host (PC). If the heartbeat is interrupted due to radiated or
conducted transient noise, it is possible that the host may lose connection
with the client. This can cause problems with data transfers over the USB
cable.

The DXM100 when used in combination with the HID Windows driver
makes it possible for the host to renumerate the client connection and
reestablish communications. This is providing the control application
implements a method of timeout and retry.

NOTE: If an EMI disruption occurrs the DXM100 will continue to
renumerate until a connection with the GUI is re-established.

118142-001 Rev B Page 32 of 104

4.3.3 Enabling Communications Objects in Visual Basic for USB

The dynamic link library USB_dll.dll will be provided which needs to be
added to the project. The library has three functions that can be called
from the VB code.

The three functions are:
 FindTheHid – finds the connection with the correct VID, PID and Serial

Number

 WriteReport(str) – Writes a string to the connected HID interface
 ReadReport() – Returns a string from the connected HID interface

4.3.4 Configuring Communications in Visual Basic for USB

To use the USB_dll.dll in VB the following statements are needed.

Dim usb As usbDll
Dim MyDeviceDetected As Boolean

Set usb = New usbDll

Using this statement determines whether a connection is present.

MyDeviceDetected = usb.FindTheHid

If MyDeviceDetected is true then the connection is present.

4.3.5 Software Considerations for USB Reconnection

The following Visual Basic code snippets are presented as a guideline for
implementation with revision C and higher assemblies.

4.3.5.1 Recognize partial, corrupt, or absent data

1: temp2$ = inputInputString

2: If temp2$ <> "" Then

3: btn_UPDATEDATA.Value = False

4: CommStatusFlag = True

5: CommaPos = InStr(Start, temp2$, Comma, vbTextCompare)

6: ' Channel 0

7: On Error GoTo endhere

8: AmbTemp = Mid(temp2$, Start, (CommaPos - Start))

Please note that even though we have guarded against no data, in

line 2, we still need to guard against bad data, in this case no

comma, on line 8. If there is no comma, we wind up passing a

negative value to Mid, which is an error, that we should trap for.

118142-001 Rev B Page 33 of 104

4.3.5.2 Retrieve data only if it exists

1: Do

2: DoEvents

3: If MSComm1.InBufferCount > 0 Then

4: str = str & MSComm1.Input

5: End If

6: Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1

7: 'str = str & MSComm1.Input

8: If InStr(str, Chr(3)) > 0 Then

9: tmrOpenClose.Enabled = False

10: End If

Notice that in line 3 we check for the existence of data before we

extract data from the USB port. Normally, if there is no data, line 4

would append an empty string. However, during a noise event,

retrieving data without first checking the existence of data could

hang.

4.3.5.3 Example Output Routine

Notice that on line 13 we register an error handler in case the port

is invalid because we have closed it in another routine. Notice that

on line 16 we start a timer. When we output data on the port we

start a timer to keep track of incoming data. If we get no incoming

data it means that communications have been interrupted.

1: Private Sub outputOutputString(outputString As String)

2: Dim str As String

3: str = ProcessOutputString(outputString)

4: StatusBar1.Panels(4).Text = "TX: " & str

5: 'StatusBar1.Panels(3).Text = "RX: Waiting"

6: If (portType = "ethernet") Then

7: tcpClient.SendData (str)

8: ElseIf (portType = "USB") Then

9: usb.WriteReport (str)

10: Else

11: MSComm1.InBufferCount = 0

12:

13: On Error GoTo done

14: MSComm1.Output = str

15: done:

16: tmrOpenClose.Enabled = True

17: End If

18: End Sub

118142-001 Rev B Page 34 of 104

4.3.5.4 Example Input Routine

Notice on line 26 we check for data first before extracting data from

the input. Then if we have actual data we turn off the timer.

Otherwise the timer routine toggles the port open/close.

1: Private Function inputInputString() As String

2: Dim str As String

3: Dim t1 As Single

4: Dim temp$

5: Dim stra As String

6: Dim stri(300) As String

7: t1 = Timer

8:

9: If (portType = "ethernet") Then

10: Do

11: DoEvents

12: tcpClient.GetData temp$

13: str = str + temp$

14: Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1

15: On Error Resume Next

16: ElseIf (portType = "USB") Then

17: Do

18: DoEvents
19: stra = usb.ReadReport
20: str = str & stra
21: 'str = str & ReadReport
22: Loop Until InStr(str, Asc(3)) Or Timer - t1 > 0.09

23: Else

24: Do

25: DoEvents

26: If MSComm1.InBufferCount > 0 Then

27: str = str & MSComm1.Input

28: End If

29: Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1

30:

31: If InStr(str, Chr(3)) > 0 Then

32: tmrOpenClose.Enabled = False

33: End If

34:

35: frm_EXTRAS.txt_MSCOMMBUFF.Text = str

36: tmr_COMMWDT.Enabled = True

37: On Error Resume Next

118142-001 Rev B Page 35 of 104

38: End If

39: StatusBar1.Panels(3).Text = "RX: " & str

40: inputInputString = str

41: tmr_RCVTIMER.Enabled = True

42: End Function

4.3.5.5 Example Timer Routine: Toggle Port State

This is the timer routine in which the open/closed state of the port is

toggled. If communications are interrupted, the USB device will re-

register itself with the OS (vendor term: renumeration). Once this

happens, re-opening the port will enable communications. Until the

re-registration happens, open operations will fail. Notice line 5

where we register an error handler.

1:Private Sub tmrOpenClose_Timer()

2: If MSComm1.PortOpen = True Then

3:

4: MSComm1.PortOpen = False

5: On Error GoTo done

6: MSComm1.PortOpen = True

7: done:

8: tmrOpenClose.Enabled = False

9: End If

10:

11: End Sub

4.3.5.6 Example Timer Routine: Port Reconnection

This is another timer routine whose purpose is to turn the port on if

it is off. Notice that in line 8 an error handler is called because if the

device has not re-registered itself with the OS, an error will be

raised.

1: Private Sub tmr_COMMWDT_Timer()

2:

3: tmr_COMMWDT.Enabled = False

4:

5: If CommStatusFlag = True Then

6:

7: If MSComm1.PortOpen = False Then

8: On Error GoTo done

9: MSComm1.PortOpen = True

10: done:

11: End If

12:

13: ElseIf CommStatusFlag = False Then

14:

118142-001 Rev B Page 36 of 104

15: If MSComm1.PortOpen = False Then

16:

17: MSComm1.PortOpen = True

18: Else

19: MSComm1.PortOpen = False

20: End If

21:

22: End If

4.3.5.7 Data Parsing Example

Here we have an example of a code that parses incoming data.

Notice that it makes use of our generic input and output routines.

The important consideration is to gracefully handle corrupted input

data after a noise event. In this case we may get data, so a test

against empty string returns false, but we may not get commas in

the correct place. Notice that we register an error handler on line 26

so that the mid function, which would raise an error when given a

negative number, is handled.

1: Private Sub btn_EMI_Click()

2: Dim temp2$

3: Dim Response1$

4: Dim Response2$

5: Dim number$

6: Dim Comma

7: Dim CommaPos

8: Dim Start

9: Dim ODATA$

10:

11: Comma = ","

12: Start = 5

13:

14: If tmr_RCVTIMER.Enabled = True Then

tmr_RCVTIMER.Enabled = False

15: If tmr_NETRCVTMR.Enabled = True Then

tmr_NETRCVTMR.Enabled = False

16:

17: If AutoUpdate = True Then

18: tmr_UPDATE.Enabled = False

19: End If

20:

21: number$ = "15,"

22: outputOutputString (number$)

23:

24: temp2$ = inputInputString

25: CommaPos = InStr(Start, temp2$, Comma, vbTextCompare)

118142-001 Rev B Page 37 of 104

26: On Error GoTo endhere

27: Response1$ = Mid(temp2$, Start, (CommaPos - Start))

28:

29: 'With a 5v reference:

30: ODATA$ = Format(str(Response1$ * 0.0004884), "0.##0")

31:

32: txt_DACB.Text = ODATA$ + " mA"

33: frm_RAWDATA.txt_RAWDACB.Text = str(Response1$)

34: txt_DACB.BackColor = vbWhite

35: CommStatusFlag = True

36: endhere:

37:

38: If portType = "ethernet" Then

39: tmr_NETRCVTMR.Enabled = True

40: Else

41: tmr_RCVTIMER.Enabled = True

42: End If

43:

44: If AutoUpdate = True Then tmr_UPDATE.Enabled = True

46: End Sub

118142-001 Rev B Page 38 of 104

5.0 ETHERNET COMMANDS

5.1 TCP/IP FORMAT

Each Ethernet command will consist of a TCP/IP header followed by the required
data bytes. Figure 24 summarizes the TCP/IP header configuration. Please note
that this functionality is provided by the software implementation of the Open
Systems Interconnection (OSI) TCP/IP protocol stack, specifically the upper 4
layers.

Byte

0 Protocol

Version

Header

Length

4 Packet ID Flags Fragmentation Offset

Type Of

Service

Total Length

8 Time To Live

Protocol Header checksum

12 Source Address

16 Destination Address

20 Source Port

Destination Port

24 Sequence Number

28 Acknowledgement Number

32 Data

Offset

36 Checksum

40 Data Byte 1

Reserved Code Bits

Data Byte 2 Data Byte 3 Data Byte N

Window

Urgent Pointer

Figure 24: Network TCP/IP datagram header

118142-001 Rev B Page 39 of 104

The format of Data Bytes 1 through N are as follows:
<STX><CMD><,>ARG><,><ETX>
Where:

<STX> = 1 ASCII 0x02 Start of Text character
<CMD> = 2 ASCII characters representing the command ID
<,> = 1 ASCII 0x2C character
<ARG> = Command Argument
<,> = 1 ASCII 0x2C character
<ETX> = 1 ASCII 0x03 End of Text character

5.2 COMMAND ARGUMENTS

The format of the numbers is a variable length string. To represent the number
42, the string ‘42’, ‘042’, or ‘0042’ can be used. This being the case, commands
and responses that carry data are variable in length.

5.3 COMMAND OVERVIEW

Data Byte section of the TCP/IP Datagram
Command Name <CMD> <ARG> RANGE
Program RS-232

07 1 ASCII 1 - 5
unit baud rate
Program kV 10 1-4 ASCII 0-4095
Program mA 11 1-4 ASCII 0-4095
Program Filament

12 1-4 ASCII 0-4095
Limit
Program Filament

13 1-4 ASCII 0-4095
Pre-Heat
Request kV

14 None ­Setpoint
Request mA

15 None ­Setpoint
Request Filament

16 None ­Limit Setpoint
Request Filament

17 None ­Pre-Heat Setpoint
Request Analog

19 None ­Monitor
Readbacks
Request HV On

21 None ­Hours Counter
Request Status 22 None ­Request Software

23 None ­Version

118142-001 Rev B Page 40 of 104

Request Hardware

24 None ­Version
Request Web

25 None ­Server Version
Request Model

26 None ­Number
Reset HV On

30 None ­Hours Counter
Reset Faults 31 None ­Program Power

47 1-4 ASCII 1-1200
Limit
Request Power

48 None ­Limit Setpoint
Request Network

50 None ­Settings
Program Network
Settings
Request kV

51 6 ASCII See

Description

60 None ­monitor
Request mA

61 None ­monitor
Request Filament

62 None ­Feedback
Request Filament

63 None ­Limit
Request Filament

64 None ­Pre-Heat
Request –15V

65 None ­LVPS
Request Faults 68 None -

Program
Local/Remote
Mode

5.4 RESPONSE OVERVIEW

The command responses will follow the same network TCP/IP header format as
outlined above in section 5.1. This list is comprised of Commands with complex
responses only. Commands using a simple response will use the <$> character
(ASCII 0x24) as a “Success” response or a single character error code. These
will be seven ASCII characters in length.

118142-001 Rev B Page 41 of 104

99 1 ASCII 0 or 1

Response Name <CMD> Response
Request kV

14 10 ASCII
Setpoint
Request mA

15 10 ASCII
Setpoint
Request Filament

16 10 ASCII
Limit Setpoint
Request Filament

17 10 ASCII
Pre-Heat Setpoint
Request Analog
Monitor

19 23-50

ASCII
Readbacks
Request Total

21 13 ASCII
Hours High
Voltage On
Request Status 22 11 ASCII
Request DSP

23 17 ASCII
Software Version
Request Hardware

24 9 ASCII
Version
Request Web

25 17 ASCII
Server Version
Request Model

26 11 ASCII
number
Request Power
Limit Setpoint
Request Network
Settings
Read Interlock

48 7-10

ASCII

50 48-104

ASCII

55 11 ASCII
Status
Request kV
monitor
Request mA
monitor
Request Filament
Feedback
Request –15V
LVPS

60 7-10

ASCII

61 7-10

ASCII

62 7-10

ASCII

65 7-10

ASCII

Request Faults 68 7 ASCII

118142-001 Rev B Page 42 of 104

5.5 COMMAND STRUCTURE

5.5.1 Program kV

Description:
The host requests that the firmware change the setpoint of kV.

Direction:
Host to supply

Syntax:
<STX><10><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>10,4095,<ETX>

Response:
<STX><10><,><$><,><ETX>
<STX><10><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD, 1 = out of range

118142-001 Rev B Page 43 of 104

5.5.2 Program mA

Description:
The host requests that the firmware change the setpoint of mA.

Direction:
Host to supply

Syntax:
<STX><11><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>11,4095,<ETX>

Response:
<STX><11><,><$><,><ETX>
<STX><11><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD, 1 = out of range

118142-001 Rev B Page 44 of 104

5.5.3 Program Filament Limit

Description:
The host requests that the firmware change the setpoint of Filament Limit.

Direction:
Host to supply

Syntax:
<STX><12><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>12,4095,<ETX>

Response:
<STX><12><,><$><,><ETX>
<STX><12><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD, 1 = out of range

118142-001 Rev B Page 45 of 104

5.5.4 Program Filament Pre-Heat

Description:
The host requests that the firmware change the setpoint of Filament Pre­Heat.

Direction:
Host to supply

Syntax:
<STX><13><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>13,4095,<ETX>

Response:
<STX><13><,><$><,><ETX>
<STX><13><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD, 1 = out of range

118142-001 Rev B Page 46 of 104

5.5.5 Request kV Setpoint

Description:
The host requests that the firmware report the kV setpoint.

Direction:
Host to supply

Syntax:
<STX><14><,><ETX>

Response:
<STX><14><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>14,4095,<ETX>

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5.5.6 Request mA Setpoint

Description:
The host requests that the firmware report the current mA setpoint.

Direction:
Host to supply

Syntax:
<STX><15><,><ETX>

Response:
<STX><15><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>15,4095,<ETX>

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5.5.7 Request Filament Limit Setpoint

Description:
The host requests that the firmware report the current Filament Limit
setpoint.

Direction:
Host to supply

Syntax:
<STX><16><,><ETX>

Response:
<STX><16><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>16,4095,<ETX>

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5.5.8 Request Filament Pre-Heat Setpoint

Description:
The host requests that the firmware report the current Filament Pre-Heat
setpoint.

Direction:
Host to supply

Syntax:
<STX><17><,><ETX>

Response:
<STX><17><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>17,4095,<ETX>

118142-001 Rev B Page 50 of 104

5.5.9 Request Analog Monitor Readbacks

Description:
The host requests that the firmware transmit the present values of Analog
Monitor Readbacks.

Direction:
Host to supply

Syntax:
<STX><19><,><ETX>

Example:
<STX><19>,<ETX>

Response:
<STX><19><,><ARG1><,><ARG2><,><ARG3><,><ETX>

Where:
ARG1 = kV monitor = 0 – 4095
ARG2 = mA monitor = 0 – 4095
ARG3 = Filament monitor = 0– 4095

Example:
<STX><19>,4095,4095,4095,<ETX>

118142-001 Rev B Page 51 of 104

5.5.10 Request Total Hours High Voltage On

Description:
The host requests that the firmware sends the present value of the Total
Hours High Voltage On.

Direction:
Host to supply

Syntax:
<STX><21><,><ETX>

Example:
<STX>21,<ETX>

Response:
<STX><21><,><ARG1>< ARG2>< ARG3><ARG4><ARG5>
<.><ARG6><,><ETX>

Where:

<.> = ASCII 0x2E

ARGx =0-9 in ASCII format
Example:

<STX>21,99999.9,<ETX>

118142-001 Rev B Page 52 of 104

5.5.11 Request Status

Description:
The host requests that the firmware sends the power supply status.

Direction:
Host to supply

Syntax:
<STX><22><,><ETX>

Example:
<STX>22,<ETX>

Response:
<STX><22><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,><,><ETX>

Where:
<ARG1> 1 = HvOn, 0 = HvOff
<ARG2> 1 = Interlock 1 Open, 0 = Interlock 1 Closed
<ARG3> 1 = Fault Condition, 0 = No Fault
<ARG4> 1 = Remote Mode, 0 = Local Mode

Example:
<STX>22,1,1,0,0,<ETX>

NOTE: This response will also be sent in an unsolicited manner when a
change of state is detected on the HvOn and Interlock 1 bits. This is
providing that a valid handle has already been established with a host.

118142-001 Rev B Page 53 of 104

5.5.12 Request DSP Software Part Number/Version

Description:
The host requests that the firmware sends the DSP firmware version.

Direction:
Host to supply

Syntax:
<STX><23><,><ETX>

Example:
<STX>23,<STX>

Response:
<STX><23><,>< ARG><,><ETX>

Where:
<ARG> consists of eleven ASCII characters representing the current
firmware part number/version. The format is SWM9999-999

Example:
<STX>23,SWM9999-999,<ETX>

118142-001 Rev B Page 54 of 104

5.5.13 Request Hardware Version

Description:
The host requests that the firmware sends the hardware version.

Direction:
Host to supply

Syntax:
<STX><24><,><ETX>

Example:
<STX>24,<ETX>

Response:
<STX><24><,>< ARG><,><ETX>

Where:
<ARG> consists of 3 ASCII characters representing the hardware version.
The format is ANN, where A is an alpha character and N is a numeric
character

Example:
<STX>24,A01,<ETX>

118142-001 Rev B Page 55 of 104

5.5.14 Request Webserver Software Part Number/Version

Description:
The host requests that the firmware sends the Web Server firmware part
number/version.

Direction:
Host to supply

Syntax:
<STX><25><,><ETX>

Example:
<STX>25,<ETX>

Response:
<STX><25><,><ARG><,><ETX>

Where:
<ARG> consists of eleven ASCII characters representing the current
firmware part number/version. The format is SWM9999-999

Example:
<STX>25,SWM9999-999,<ETX>

118142-001 Rev B Page 56 of 104

5.5.15 Request Model Number

Description:
The host requests that the firmware sends the unit model number

Direction:
Host to supply

Syntax:
<STX><26><,><ETX>

Example:
<STX>26,<ETX>

Response:
<STX><26><,><ARG><,><ETX>

Where:
<ARG> consists of five ASCII characters representing the model number.
The format is XNNNN or DXM100NN, where N is a numeric character.
See section 7.0 for model number codes.

Example:
<STX>25,X9999,<ETX>

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5.5.16 Reset Run Hours

Description:
The host requests that the firmware resets the run hour counter.

Direction:
Host to supply

Syntax:
<STX><30><,><ETX>

Example:
<STX>30,<ETX>

Response:
<STX><30><,><$><,><ETX>

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5.5.17 Reset Faults

Description:
The host requests that the firmware resets all Fault messages and
indicators.

Direction:
Host to supply

Syntax:
<STX><31><,><ETX>

Example:
<STX>31,<ETX>

Response:
<STX><31><,><$><,><ETX>

118142-001 Rev B Page 59 of 104

5.5.18 Program Power Limit

Description:
The Host sets the power limit of the unit,

Direction
Host to Supply

Example
<STX><47><,><ARG><,><ETX>

Where

<ARG> = 0 – 1200 in ASCII format

Response
<STX><47><,><$><ETX> or
<STX><47><,><ARG><,><ETX>

Where ARG is error Code (TBD), 1 = out of range

118142-001 Rev B Page 60 of 104

5.5.19 Request Power Limit Setpoint

Description
The host requests that the firmware report the current Power lImit setpoint

Direction
Host to Supply

Syntax

<STX><48><,><ETX>

Response

<STX><48><,><ARG><,><ETX>

Where

<ARG> = 0-1200 in ASCII format

Example

<STX>48,1200,<ETX>

118142-001 Rev B Page 61 of 104

5.5.20 Request Network Settings

Description:
The host requests that the firmware transmits the network settings

Application:

Function Device

D
i

ARG 1 ARG2 ARG3 ARG4 ARG5 ARG6

Name

Remote
Address

Remote

Port

Subnet

Mask

Default

Gateway

MAC

Address

rection:
Host to supply

Syntax:
<STX><50><,><ETX>

Example:
<STX>50,<ETX>

Response:
<STX><50><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,>
<ARG5><,><ARG6><,><ETX>

Arguments:
Device Name is limited to 20 characters or less. Remote address is a ip
address in dotted notation. Remote port is a decimal number. Subnet
Mask and Default Gateway are also dotted notation and MAC address is
in MAC Address notation.

ARG1: Device Name 1 character minimum, up to 20 maximum
ARG2: IP Address <nnn><.><nnn><.><nnn><.><nnn>, where

<nnn> represents a number from 0 to 255.
ARG3: Remote Port 5001 or from 49152 to 65535.
ARG4: Subnet Mask <xxx><.><xxx><.><xxx><.><xxx>, where

<xxx> represents a number from 0 to 255.
ARG5: Default Gateway <yyy><.><yyy><.><yyy><.><yyy>, where

<yyy> represents a number from 0 to 255.
ARG6: MACAddress <zzz><:><zzz><:><zzz><:><zzz><:><zzz>

<:><zzz> , where <zzz> represents a number

from 0 to 255.
Example:

<STX>50,Spellman2.0,32.78.110.37,1026,255.0.0.0,192.168.1.1,0:100:33
:1:32:84,<ETX>

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5.5.21 Program Network Settings

Description:
The host requests that the firmware programs the network settings and
then reboots.

Application:

Function Device

ARG 1 ARG2 ARG3 ARG4 ARG5 ARG6

Name

Remote

Address

Remote

Port

Subnet

Mask

Default

Gateway

MAC

Address

Direction:
Host to supply

Syntax:
<STX><51><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,>
<ARG5><,><ARG6><,><ETX>

Arguments:
Device Name is limited to 20 characters or less. Remote address is a ip
address in dotted notation. Remote port is a decimal number. Subnet
Mask and Default Gateway are also dotted notation and MAC address is
in MAC Address notation.

ARG1: Device Name 1 character minimum, up to 20 maximum
ARG2: IP Address <nnn><.><nnn><.><nnn><.><nnn>, where

<nnn> represents a number from 0 to 255.
ARG3: Remote Port 5001 or from 49152 to 65535.
ARG4: Subnet Mask <xxx><.><xxx><.><xxx><.><xxx>, where

<xxx> represents a number from 0 to 255.
ARG5: Default Gateway <yyy><.><yyy><.><yyy><.><yyy>, where

<yyy> represents a number from 0 to 255.
ARG6: MACAddress <zzz><:><zzz><:><zzz><:><zzz><:><zzz>

<:><zzz> , where <zzz> represents a number

from 0 to 255.
Example:

<STX>51,Spellman2.0,32.78.110.37,1026,255.0.0.0,192.168.1.1,0:100:33
:1:32:84,<ETX>

Response:
None, as Embedded server reboots with new settings.

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5.5.22 Read Interlock Status

Description:
The host requests that the firmware read the status of the interlock
channel.

Direction:
Host to supply

Syntax:
<STX><55><,><ETX>

Response:
<STX><55><,><ARG1><,><ETX>
Where ARG1 is Interlocks 1. A 1 indicates that the Interlock is energized

Example:
<STX>55,1,<ETX>

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5.5.23 Request kV Monitor

Description:
The host requests that the firmware report kV monitor.

Direction:
Host to supply

Syntax:
<STX><60><,><ETX>

Response:
<STX><60><,><ARG><,><ETX>

Where:
<ARG>=0-4095 in ASCII format representing unscaled value.

Example:
<STX>60,4095,<ETX>

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5.5.24 Request mA Monitor

Description:
The host requests that the firmware report mA monitor.

Direction:
Host to supply

Syntax:
<STX><61><,><ETX>

Response:
<STX><61><,><ARG><,><ETX>

Where:
<ARG>=0-4095 in ASCII format representing unscaled value.

Example:
<STX>61,4095,<ETX>

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5.5.25 Request Filament Feedback

Description:
The host requests that the firmware report Filament Feedback.

Direction:
Host to supply

Syntax:
<STX><62><,><ETX>

Response:
<STX><62><,><ARG><,><ETX>

Where:
<ARG>=0-4095 in ASCII format representing unscaled value.

Example:
<STX>62,4095,<ETX>

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5.5.26 Request –15V LVPS

Description:
The host requests that the firmware report –15V LVPS.

Direction:
Host to supply

Syntax:
<STX><65><,><ETX>

Response:
<STX><65><,><ARG><,><ETX>

Where:
<ARG>=0-4095 in ASCII format representing unscaled value.

Example:
<STX>65,4095,<ETX>

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5.5. 27 Request Faults
Description:

The host requests that the firmware report Faults.
Direction:

Host to supply
Syntax:

<STX><68><,><ETX>

Response:
<STX><68><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,><ARG5><,
><ARG6><,><ARG7><,><ETX>

Where:
<ARGx> 1 = Fault, 0 = No Fault in ASCII format

ARG1 = ARC
ARG2 = Over Temperature
ARG3 = Over Voltage
ARG4 = Under Voltage
ARG5 = Over Current
ARG6 = Under Current
ARG7 = Power Limit

Example:
<STX>68,0,0,0,0,1,0,0,<ETX>

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5.5.28 Turn HV on/off

Description:
The host requests that the firmware turn high voltage on or high voltage
off.

Direction:
Host to supply

Syntax:
<STX><98><,><ARG><,><ETX>

Where:
<ARG> 1 = HV on, 0 = HV off in ASCII format

Example:
<STX>98,1,<ETX>

Response:
<STX><98><,><$><,><ETX>
<STX><98><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD,

1 = out of range

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5.5.29 Program Local/Remote Mode

Description:
The host requests that the firmware to switch between Local and Remote
Mode.

Direction:
Host to supply

Syntax:
<STX><99><,><ARG><,><ETX>

Where:
<ARG> 1 = Remote, 0 = Local in ASCII format

Example:
<STX>99,1,<ETX>

Response:
<STX><99><,><$><,><ETX>
<STX><99><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD,

1 = out of range

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5.5.31 Program RS-232 Baud rate

Description:
The host requests that the firmware change the Baud rate for RS-232.

Direction:
Host to supply

Syntax:
<STX><07><,><ARG><,><CSUM><ETX>

Where:
<ARG> 1 = 9.6k in ASCII format

<ARG> 2 = 19.2k in ASCII format
<ARG> 3 = 38.4k in ASCII format
<ARG> 4 = 57.6k in ASCII format
<ARG> 5 = 15.2k in ASCII format

Example:
<STX>07,1,<CSUM><ETX>

Response:
<STX><07><,><$><,><CSUM><ETX>
<STX><07><,><ARG><,><CSUM><ETX>

where <ARG> = error code
Error Codes TBD,

1 = out of range

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6.0 SERIAL COMMANDS – RS-232 / USB

6.1 SERIAL INTERFACE PROTOCOL

Serial communications will use the following protocol:
<STX><CMD><,>ARG><,><CSUM><ETX>
Where:

<STX> = 1 ASCII 0x02 Start of Text character
<CMD> = 2 ASCII characters representing the command ID
<,> = 1 ASCII 0x2C character
<ARG> = Command Argument
<,> = 1 ASCII 0x2C character
<CSUM> = Checksum (see section 6.3 for details)
<ETX> = 1 ASCII 0x03 End of Text character

6.2 COMMAND ARGUMENTS

The format of the numbers is a variable length string. To represent the number
42, the string ‘42’, ‘042’, or ‘0042’ can be used. This being the case, commands
and responses that carry data are variable in length.

6.3 CHECKSUMS

The checksum is computed as follows:

 Add the <CMD>, <,>, and <ARG> bytes into a 16 bit (or larger) word.

The bytes are added as unsigned integers.

 Take the 2’s compliment (negate it).
 Truncate the result down to the eight least significant bits.
 Clear the most significant bit (bit 7) of the resultant byte, (bitwise AND with

0x7F).

 Set the next most significant bit (bit 6) of the resultant byte (bitwise OR

with 0x40).
Using this method, the checksum is always a number between 0x40 and 0x7F.
The checksum can never be confused with the <STX> or <ETX> control
characters, since these have non-overlapping ASCII values.

If the DSP detects a checksum error, the received message is ignored – no
acknowledge or data is sent back to the host. A timeout will act as an implied
NACK.

The following is sample code, written in Visual Basic, for the generation of
checksums:

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Public Function ProcessOutputString(outputString As String) As String
Dim i As Integer

Dim CSb1 As Integer
Dim CSb2 As Integer
Dim CSb3 As Integer
Dim CSb$
Dim X

X = 0
For i = 1 To (Len(outputString)) 'Starting with the CMD character
X = X + Asc(Mid(outputString, i, 1)) 'adds ascii values together
Next i

CSb1 = 256 - X
CSb2 = 127 And (CSb1) 'Twos Complement
CSb3 = 64 Or (CSb2) 'OR 0x40
CSb$ = Chr(Val("&H" & (Hex(CSb3))))
ProcessOutputString = Chr(2) & outputString & CSb$ & Chr(3)

End Function

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6.4 COMMAND OVERVIEW

Data Byte section of the TCP/IP Datagram

Command Name <CMD> <ARG> RANGE

Program RS-232

unit baud rate

Program kV 10 1-4 ASCII 0-4095

Program mA 11 1-4 ASCII 0-4095

Program Filament

Limit

Program Filament

Pre-Heat

Request kV

Setpoint

Request mA

Setpoint

Request Filament

Limit Setpoint

Request Filament

Pre-Heat Setpoint

Request Analog

Monitor

Readbacks

Request HV On

Hours Counter

Request Status 22 None -

Request Software

Version

Request Hardware

Version

Request Web

Server Version

Request Model

Number

Reset HV On

Hours Counter

Reset Faults 31 None -

Program Power

Limit

Request Power

Limit Setpoint

Read Interlock

Status

Request kV

monitor

07 1 ASCII 1 - 5

12 1-4 ASCII 0-4095
13 1-4 ASCII 0-4095
14 None ­15 None ­16 None ­17 None ­19 None -

21 None -

23 None ­24 None ­25 None ­26 None ­30 None -

47 1-4 ASCII 0-1200
48 None ­55 None ­60 None -

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Request mA

61 None ­monitor
Request Filament

62 None ­Feedback
Request Filament

63 None ­Limit
Request Filament

64 None ­Pre-Heat
Request –15V

65 None ­LVPS
Request Faults 68 None -

Turn HV on/off 98 1 ASCII 0 or 1
Program

99 1 ASCII 0 or 1
Local/Remote
Mode

6.5 RESPONSE OVERVIEW

The command responses will follow the same format as outlined above in
section 6.1. This list is comprised of Commands with complex responses
only. Commands using a simple response will use the <$> character
(ASCII 0x24) as a “Success” response or a single character error code.
These responses will be eight ASCII characters in length.

Response Name <CMD> Response
Request kV

14 10 ASCII
Setpoint
Request mA

15 10 ASCII
Setpoint
Request Filament

16 10 ASCII
Limit Setpoint
Request Filament

17 10 ASCII
Pre-Heat Setpoint
Request Analog
Monitor

19 23-50

ASCII
Readbacks
Request Total

21 13 ASCII
Hours High
Voltage On
Request Status 22 11 ASCII
Request DSP

23 17 ASCII
Software Version

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