Spellman PMX User manual

PMX MANUAL 118163-001 Rev A
R
Instruction Manual
High Voltage Power Supply
MODEL :
SERIAL# :
DATE :
SPELLMAN
HIGH VOLTAGE ELECTRONICS
CORPORATION
475 Wireless Blvd.
Hauppauge, New York, 11788
[phone]*FAX: [phone]*
E-mail: [email protected]
Website: www.spellmanhv.com
PMX

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

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

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

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

PMX MANUAL 1 118164-001 REV. A
Contents
CHAPTER 1INTRODUCTION....................................................2
1.1 PMX DESCRIPTION...............................................2
1.1.1 Power Supply Requirements ................................3
1.1.2 Environment Requirements..................................4
1.2 THEORY OF OPERATION ....................................4
1.2.1 Function Overview...............................................4
1.2.2 Line Rectification and Filtering...........................4
1.2.3 Inverter.................................................................4
1.2.4 High Voltage Transformer...................................4
1.2.5 High Voltage Assembly........................................4
1.2.6 System Control PWB............................................4
1.2.7 Filament Power Supply........................................5
1.2.8 High Speed Starter...............................................6
1.3 SAFETY...................................................................7
1.3.1 Safety and Warning Symbols................................7
CHAPTER 2INSTALLATION.....................................................8
2.1 INTRODUCTION....................................................8
2.2 UNPACKING ..........................................................8
2.3OVERALL CONNECTIONS............................................8
2.4POWER LINE MAINS ..........................................10
2.5Cable connection illustration.............................10
2.5.1 HV Cable Connection........................................10
2.5.2 Stator Cable Connection....................................11
2.5.3 Filament Driver Cable Connection....................11
2.6MULTI INTERFACE CABLE CONNECTIONS..12
2.6.1 Pin Layout of the Multi interface.......................12
2.7 INTERLOCK CONNECTIONS......................................14
2.8 TUBE CURRENT MONITOR CONNECTION.................14
2.9GROUND CONNECTION....................................14
2.9.1 X-Ray Tube Housing Ground.............................14
2.9.2 Chassis Ground..................................................15
2.10 FINAL CHECKS....................................................15
2.11GUI SOFTWARE ..................................................15
CHAPTER 3...........................................................................17
INTERFACING........................................................................17
3.2 MULTI INTERFACE.............................................17
3.2.1 Connector Style and Pin Layout ........................17
3.2.2 Serial Communication Interface........................18
3.2.3 Digital I/O Control Interface.............................19
3.2.4 Remote Status Interface .....................................20
3.2.5 Remote Monitoring Interface.............................22
3.3 ETHERNET INTERFACE.............................................22
CHAPTER 4CONFIGURATION,CALIBRATION AND
OPERATION ..........................................................................23
4.1 INTRODUCTION........................................................23
4.2 TUBE PREHEAT TABLE CONFIGURATION..................23
4.3 FILAMENT AUTO-CALIBRATION ...............................25
4.4OPERATING X-RAY EXPOSURES ...............................26
4.4.1 Normal Exposure...............................................26
4.4.2 AEC Exposure....................................................28
4.4.3 Smart AEC Exposure .........................................29
CHAPTER 5...........................................................................32
TROUBLE SHOOTING ............................................................32
5.1 INTRODUCTION.................................................32
5.2STATUS AND ERROR CODES...........................32
5.2.1 Status Messages.................................................32
5.2.2 Faults Messages................................................33
CHAPTER 6 .......................................................................39
MAINTENANCE...............................................................39
6.1INTRODUCTION.................................................39
6.2 PERFORMANCE TEST ...............................................39
6.3 HIGH VOLTAGE DIVIDERS........................................39
CHAPTER 7 .......................................................................40
REPLACEMENT PARTS..................................................40
CHAPTER 8 .......................................................................41
FACTORY SERVICE ........................................................41

PMX MANUAL 2 118164-001 REV. A
CHAPTER 1
INTRODUCTION
1.1 PMX DESCRIPTION
Spellman’s PMX redefines the standard for high
performance Mammography X-Ray generators
including FFDM and DBT. It features 2 and 3
point exposure modes as well as smart AEC
with pre exposure.
The 50kV @ 5kW (peak) high voltage output
coupled with a dual focal spot, DC current
source filament power supply provides stable
and accurate X-Ray tube emission currents.
The solid encapsulated high voltage output
section eliminates oil concerns while reducing
effects of environmental humidity and
contamination.
PMX’s flexible interfacing and controlling
capabilities as well as powerful application
features represent a radically new advanced
approach to mammography X-Ray generators.

PMX MANUAL 3 118164-001 REV. A
1.1.1 Power Supply Requirements
Single Phase
Line Voltage 200Vac-240Vac, +/-10%, 1 Phase, 35 Amps
Line Frequency 50/60 Hz.
In Rush Current 50 Amps, Maximum
Standby Current 1 Amp
WARNING: The PMX generator can provide power that can damage the X-Ray tube. The user is
responsible for limiting the maximum exposure values to within the ratings of the X-Ray
tube. Spellman is not liable for any damage to the X-Ray tube by the misuse of the PMX
X-Ray generator.
The following table defines the power line requirements for the generators.
NOTE: THE FOLLOWING TABLE CONTAINS RECOMMENDED VALUES FOR THE WIRE SIZES
BETWEEN THE MAINS DISCONNECT AND THE GENERATOR. THE ACTUAL VALUES USED AT
AN INSTALLATION ARE DEPENDENT ON THE QUALITY OF THE INPUT LINE (VOLTAGE
LEVEL) THE CURRENT REQUIREMENTS AND THE LENGTH OF THE CABLE RUN AND MUST
BE CONFIRMED BY THE INSTALLER.
ALL THE RATINGS LISTED CONSIDER THE GENERATOR REQUIREMENTS ONLY. THE
INSTALLER MUST MAKE THE NECESSARY COMPENSATION FOR ADDITIONAL LOAD
REQUIREMENTS
A POOR QUALITY INPUT LINE MAY RESULT IN THE INSTALLER HAVING TO
DERATE THE GENERATOR'S MAXIMUM POWER
Mains
Voltage
Minimum
Recommended
Mains
Disconnect
to Generator
15 ft./5 m max)
Generator
In Rush Line
Current
Minimum
Recommended
Generator
Service Rating
Minimum
Recommended
Ground
Wire
Size
Apparent
Mains
Resistance
220 Vac
#10
(6 mm2)50 A 35 A #10
(6 mm2)0.06 Ω
•External EMC Filter (required to meet
CE/EMC specifications) – Not provided with
the generator. Customer is responsible for
providing the external filter as needed;
Schaffner FN2070-08-36A type EMI filter or
equivalent one recommended.
•Mains Contactor - Not provided within the
generator. Customer is responsible for
mains safety disconnection.

PMX MANUAL 4 118164-001 REV. A
1.1.2 Environment Requirements
Operating Environment
Operating Temperature
10 to 40
°
C (50 to 104
°
F).
Relative Humidity
20 to 85%, non-condensing.
Atmospheric pressure range
500 to 1060 hPa (375 to 795 mm Hg).
TRANSPORT AND STORAGE
Ambient temperature range
-40 to 85
°
C (-40 to 185
°
F).
Relative humidity
5 to 95%, non-condensing.
Atmospheric pressure range
500 to 1060 hPa (375 to 795 mm Hg).
1.2 THEORY OF OPERATION
1.2.1 Function Overview
The PMX X-Ray generator utilizes sophisticated
power conversion technology. A variety of
analog, digital and switching power conversion
techniques are used throughout.
The PMX generator is basically an AC to DC
power converter. Within the generator,
conversions of AC to DC, then to high frequency
AC, then to high voltage DC take place. By
reviewing further the sub-assemblies, a basic
understanding of the process can be gained.
1.2.2 Line Rectification and Filtering
Basic AC line rectification provides the DC buss
voltage for the high voltage inverter, Anode
rotor drive, and the filament supply.
The input line voltage can vary from 180V up to
264V within the series.
The line voltage is connected directly to the EMI
filter. The EMI filter reduces conducted HF noise
on the AC mains. The output of the EMI filter is
connected to an off line auxiliary power inverter
circuit that provides 24V power for generating
other auxiliary supply DC voltages.
1.2.3 Inverter
The inverter is a “half-bridge” topology. Current
mode control is used for driving the inverter. An
IGBT power module employed. The IGBT
provides high frequency switching to control the
primary current flow to the high voltage
transformer.
Circuits on the Power PCB board provide the
gate control of the IGBT switches. The system
control board generates gate drive control
signals. The circuits on the Power PCB provide
the required gate voltages and offsets.
1.2.4 High Voltage Transformer
The output of the High Frequency Quasi-
resonant Inverter is connected to the primary of
the High Voltage Transformer. The High
Voltage Transformer is a step up type. Typical
secondary output voltage is in the range of
12.5kV depending upon output voltage ratings.
1.2.5 High Voltage Assembly
The High Voltage Assembly will vary depending
upon the model ordered. The circuitry typically
consists of an arrangement of half wave voltage
doubler.
A high bandwidth resistive/capacitive divider
provides voltage feedback for regulation and
monitoring. A sense resistor connected at the
low voltage end of the High Voltage Multiplier
circuit provides current feedback for regulation
and monitoring.
1.2.6 System Control PWB
Auxiliary DC voltages are generated in the low
voltage power supply section of the System
Control PWB.

PMX 5 118164-001 REV. A
LEDs provide status diagnostics needed for
recognizing the operation/shutdown mode of
the generator.
A precision +10Vdc reference is generated on
the control PCB for programming kV, mA and
other references.
Control of the generator utilizes sophisticated
analog and digital circuitry resulting in fast and
accurate control, protection and communication
interfacing.
This generator is based on advanced quasi-
resonant PWM control. Analog signals are
digitized in A/D converter and processed within
FPGA and DSP circuits to provide maximum
accuracy and reliability.
All feedback signals are sent to the user
interface through digital and D/A circuits where
switching is possible between feedback and
program signals. This allows the user to preset
the desired output before energizing high
voltage.
All program voltages are typically ramped up to
set level by the digital ramp generator.
FPGA and accompanying A-D and D-A
converters and drivers provide system Fault
Control Indication. User interface is processed
on this PWB as well, providing isolated relay
coils, opto couplers and open collector contacts.
1.2.7 Filament Power Supply
The filament inverter provides the power to drive
the filament winding of the X-Ray tube. The
filament inverter is a high frequency, series
resonant inverter. The inverter provides high
frequency ac current to the primary of the
filament isolation transformer. The filament
isolation transformer secondary is connected to
a full wave rectifier and capacitor filter creating
a DC filament. Relay K4 connects the filament
output to TB3 terminals 1 or 3 for small or large
filament respectively as required by the
operator. The filament circuitry also provides a
variety of control, diagnostic and protection
functions.
See Figure 1.2 for a simplified diagram of the X-
Ray tube connection and current sensing
circuits. The filament circuitry also provides a
variety of control, diagnostic and protection
functions.
If any abnormal condition appears, monitoring
circuitry will shut down the unit indicating the
fault.
Figure 1.2 Simplified schematic of X-Ray tube connection

PMX MANUAL 6 118164-001 REV. A
1.2.8 High Speed Starter
The rotating anode is powered and controlled
by the action of a split-phase type of induction
motor circuits in the PMX generator. The
rotating anode has considerable mass to
dissipate the heat generated by the beam
current, and subsequently requires some time
to accelerate to its normal operating speed. To
reduce this time, the “high speed starter” circuit
in the PMX applies a series of “boost” steps
consisting of different frequencies and
increased voltage during the boost cycle to
increase the acceleration of the anode rotation
to operating speed within several seconds.
Following the boost cycle, the applied voltage is
reduced to proper voltage to maintain rotation.
There are two operating modes for the anode
rotor: low speed (60Hz stator voltage), and high
speed (180Hz stator voltage). These are
selected by the operator depending on the
requirements of the application.
The PMX is equipped with safety interlocks for
user personnel and equipment protection. An
open interlock circuit inhibits operation of the
PMX generator.

PMX MANUAL 7 118164-001 REV. A
1.3 SAFETY
1.3.1 Safety and Warning Symbols
WARNING: THIS X-Ray UNIT MAY BE DANGEROUS TO OPERATOR UNLESS SAFE EXPOSURE
FACTORS AND OPERATING INSTRUCTIONS ARE OBSERVED.
The following advisory symbols are used on the safety warning labels, and/or on circuit boards.
High voltage symbol used to indicate the presence of
high voltage.
Warning symbol used to indicate a potential hazard to
operators, service personnel or to the equipment.

PMX MANUAL 8 118164-001 REV. A
CHAPTER 2
INSTALLATION
2.1 INTRODUCTION
This chapter contains instructions for
unpacking, positioning, and cabling the PMX
generator, allowing for initial power-up and
exposures.
2.2 UNPACKING
WARNING: THE GENERATOR
WEIGHS APPROXIMATELY
23 POUNDS (10.5KG).
1. 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.
2. Remove the cardboard outer
packaging. See the cautionary note
below before removing the
packaging.
CAUTION: OPEN THE CARDBOARD
PACKAGING CAREFULLY. SHARP TOOLS MAY
DAMAGE THE CONTENTS.
3. Set aside the cardboard packaging.
4. After unpacking, inspect for visible
damage.
5. Keep the shipping containers. In
case of shipping damage, place the
unit(s) back in its shipping pack and
notify the carrier and the Customer
Support Department as indicated in
this manual.
2.3 OVERALL CONNECTIONS
NOTE: THIS IS BASIC CONNECTION
ILLUSTRATION FOR TESTING. MORE
COMPLEX AND DEDICATED CIRCUITRY
IS NEEDED IN THE FINAL APPLICATION.
All cables should be routed away from high
voltage areas, and dressed and secured
neatly in place. Cables should be cut to the
correct length if possible as excess cabling
may contribute to EMI/RFI problems. For
those cables that cannot be cut to the correct
length (HV cables and console cables for
example), try to minimize the area inside any
loops of excess cable, as these loops are in
effect an antenna.

PMX MANUAL 9 118164-001 REV. A
Figure 2-1: PMX I/O and indicator locations

PMX MANUAL 10 118164-001 REV. A
TB1
1.GROUND
2.AC-1
3.AC-2
JB1
CONTROL
INTERFACE
TB3
TB2
ANODE DRIVE
FILAMENT DRIVE
HIGH VOLTAGE
OUTPUT
JB3
ETHERNET
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
GROUND STUD
SYSTEM INTERLOCK
FILTER N
L
PE
mA TEST PINS
FUSE CONTACTOR
INTERFACE
CABLE
SYSTEM INTERFACE
(OPTIONAL)
X-RAY TUBE
HV CABLE
VMX GENERATOR
POWER LINE
LV CABLE
INTERLOCK
SHORT THE WIREPAIR IF
SYSTEM INTERLOCK NOT
AVAILABLE
INTERLOCK WIRE
USER SUPPLIED COMPONENT
NOTE:
Figure 2-2: Overall connection
2.4 POWER LINE MAINS
WARNING: MAIN CONTACTOR IS NOT
PROVIDED WITHIN THE GENERATOR,
CUSTOMER IS RESPONSIBLE FOR MAINS
SAFETY DISCONNECTION.
The PMX supply does not contain power
line current limiting or fuses. It is strongly
recommended that the user provide fuses
or circuit breaker protection on the input
power lines to limit fault current that may
occur due to component failure, or
operator error. Fuses or circuit breakers
with current rating of 35 Amps are
recommended
Refer to Chapter 1 for generator power and
generator power line requirements.
1. Check the input voltage rating on the
nameplate of the supply and make
certain that this is the rating of the
power source to be connected.
2. Units operate on 200V-240VAC, +/-
10%, 50/60Hz, single phase 35A.
3. A three-wire terminal block (TB1) is
provided for connecting to the AC
supply (refer to Figure 2-2).
4. DO NOT SWITCH ON MAINS
POWER AT THIS TIME.
2.5 Cable connection illustration
2.5.1 HV Cable Connection
The X-Ray tube should be mounted in its
normal fixture i.e. tube stand or other
device.
1. Verify that the HV cable terminations
are clean and in good condition.
2. Be sure that the rubber expansion
ring is located at the bottom of the HV
cable plug.

PMX MANUAL 11 118164-001 REV. A
3. Connect HV cable to the CA3 type
high voltage output terminal at rear of
the unit.
4. Connect the other side of HV cable
to the corresponding HV terminal on
tube housing.
5. Connect the cable shield wire
accompanying HV cable to the PMX
ground stud and tube housing
separately.
2.5.2 Stator Cable Connection
Refer to Table 2-1 for the X-Ray tube stator
connections.
1. Tube low voltage cable is a hybrid
one with filament and stator drive
wire bundled together. Tube side
should be standard terminal style,
while generator side is unterminated.
Customer should terminate the wire
with suitable terminal.
2. Connect wires from the X-Ray tube
housing low voltage connector stator
pins to PMX terminal block TB2
terminals 1 (stator PHASE), 2 (stator
RUN), 3 (stator COM), and 4
(GROUND).
3. Connect tube thermal switch wires to
TB3-5 and TB3-6 if present. If not,
short the two pins. Normally, there
are no such separate wires for
MAMMO tubes; it is always
integrated into the three phase line.
Refer to tube housing data sheet for
specific information.
2.5.3 Filament Driver Cable Connection
1. Filament driver cable has three wires
and bundled together with stator
wires within same cable. Customer
should terminate the wire with
suitable terminals and leave enough
length to reach the terminal TB3.
2. Connect wires from the X-Ray tube
housing low voltage connector
filament pins to PMX terminal block
TB3 terminals 1 (FIL Small), 2 (FIL
COM), and 3 (FIL Large).

PMX MANUAL 12 118164-001 REV. A
Pin #
Definition
Description
TB3-1
SMALL FIL
To tube small filament.
TB3-2
COMMON
To tube filament common.
TB3-3
LARGE FIL
To tube large filament.
Table 2-2. Pin layout of filament driver connector.
2.6 MULTI INTERFACE CABLE
CONNECTIONS
The PMX has multi interface connections
include digital I/O, serial communication, and
interlock. Operator must verify and connect
every signal properly though some of them
are optional, before initiating power-up and
basic test.
The interlock, serial communication and
exposure buttons interface shall be made
available via a multi signal cable. Refer to *-*
for a schematic of isolation and signal
direction.
2.6.1 Pin Layout of the Multi interface
The multi signal interface shall have a female
25 pin D-Sub (JB1) on the PMX. Twisted
pairs shall be used where applicable. The pin
layout is given in Table 2-3.
Pin #
Definition
Description
JB1-1
GND
Generator signal ground for reference of interface
circuits
JB1-2
(+) 5VDC Out
5 volts DC from generator for use in powering
interface circuitry
such as optocouplers. 100mA
maximum.
JB1-3
RS232 Tx Out
RS232 Transmit (out) from generator
JB1-4
RS232 Rx In
RS232 Receive (in) to generator
JB1-5
PREP
User Signal (Contact Closure) to alert the
generator that exposure sequence will begin. Once
this signal is active, exposure parameters are
locked in and cannot be changed. The generator
enables the starter to boost the rotor. Contact
connection to pin 24. Closed = PREP.
JB1-6
READY
Generator Signal to user to indicate the rotor runs
to speed and the generator is ready for X-Ray
exposure. Transistor output. Low/Active=Ready
JB1-7
ROTOR SHUTDOWN
User Signal to generator to brake the rotor drive off.
Low brakes Rotor. (Open will not restart rotor until
a new PREP cycle is started). Reference to GND.
JB1-8
EXPOSURE
User Signal (Contact Closure) to generator to
generate X-Rays. Filament is boosted, and High
Voltage is generated after the boost time.
(Approximately 1 second). Contact connection to
pin 24. Closed=Exposure.

PMX MANUAL 13 118164-001 REV. A
JB1-9
X-Ray ON 75% Status
Transistor output to indicate X-Ray ON status.
(Reference to GND). High/Active=X-Ray ON
Status Synchronize with 75% kV setting point.
JB1-10
X-Ray ON Status
Transistor output to indicate HV ON status.
(Reference to GND). High/Active=HV ON Status.
Synchronize with HV start-up.
JB1-11
N/C
Not Used
JB1-12
X-Ray SHUTDOWN/AEC
User Signal to generator to rapidly turn HV OFF
and ON during Exposure. (AEC).
Reference to
GND. LOW Shuts down HV.
JB1-13
RS232 ISO Ground
Isolated ground from the isolated RS232
transceiver I.C.
JB1-14
HVG FAULT Status
Generator signal indicating generator fault. Open
collector transistor output. Low/Active=Fault
JB1-15
Status Bit 1
3 bit status lines for up to 6 status messages. See
separate matrix (Table 2-4) describing
functionality. Open Collector transistor output.
Low/Active=Message.
JB1-16
Status Bit 2
JB1-17
Status Bit 3
JB1-18
N/C
N/C
JB1-19
N/C
N/C
JB1-20
kV Monitor
Signal from generator. 0-10V=0-50kV. Zout=1K
ohm
JB1-21
Emission Monitor
Signal from generator. 0-10V=0-200mA. Zout=1K
ohm
JB1-22
Filament Current Monitor
Signal from generator. 0-10V=0-6A. Zout=1K ohm
JB1-23
Program/Monitor Return
Ground for reference of program and monitor
signals
JB1-24
+24VDC Out
For connection to PREP and EXPOSURE control
relay coils.
JB1-25
SHIELD/GND
For connection of interface cable shield to
generator chassis ground.
Table 2-3 Pin layout of multi signal connector
Refer to chapter 3 for detailed requirements and function descriptions.

PMX MANUAL 14 118164-001 REV. A
2.7 Interlock Connections
Interlock connections are provided for a
variety of safety functions such as room door
interlock, separate thermal switch interlock,
tube flow switch interlock. The unit will not
operate unless the interlocks are closed.
Opening the interlock circuit will cause the
unit to shut off.
Three safety interlocks are located in TB3 for
system interlock purpose. Short the terminals
if not used.
The pin definition shows below:
Pin #
Definition
Description
TB3-5
Interlock 2 +
Used if tube has separate thermostat switch.
Open=over temp. (Short terminals if not used).
TB3-6
Interlock 2 -
TB3-7
Interlock 3 +
Used if tube has cooling circulator flow switch.
Open=no flow. (Short terminals if not used).
TB3-8
Interlock 3 -
TB3-9
Safety Interlock+
User signal (Contact Closure) for safety interlocks
such as door interlocks. Open turns
HV OFF, or
inhibits HV from being generated.
TB3-10
Safety Interlock-
2.8 Tube Current Monitor Connection
Tube current test pins are provided for
monitoring the actual tube current (mA) if
needed. Normally, a jumper is installed to
short the two pins (refer to Figure 2-2).
Remove the jumper and install the current
meter in series to monitor the actual tube
current.
Two test pins are located in TB3 (TB3-15,
TB3-16). Short the two pins if not used.
The pin definition shows below:
Pin #
Definition
Description
TB3-15
Tube current +
Tube current flows out from this pin.
TB3-16
Tube current -
Tube current flows into this pin.
2.9 GROUND CONNECTION
NOTE: THE INSTALLER SHOULD ENSURE THAT ALL CABLE CONNECTIONS TO THE GENERATOR
ARE SECURE, AND ALL CABLES EXTERNAL TO THE GENERATOR ARE
ADEQUATELY PROTECTED AGAINST ACCIDENTAL DISCONNECTION.
2.9.1 X-Ray Tube Housing Ground
A separate ground wire (10 AWG, 6mm2)
must be connected from the X-Ray tube
housing to the ground stud on the rear of the
PMX chassis. These ground locations may
have other ground wires already connected;
ensure that these existing ground wires are
not disconnected when making the X-Ray
tube ground connection.
Failure to make this ground connection may
result in intermittent operation and/or
exposure errors or even worse IGBT failure.

PMX MANUAL 15 118164-001 REV. A
2.9.2 Chassis Ground
The chassis of the PMX generator must be
grounded to the local earth ground and also
to the tube housing ground. See Figure 2-2
for typical operating setup. A three-wire
terminal block is provided for connecting to
the AC supply.
2.10 FINAL CHECKS
The room interface connections may now be
completed. Before power on, user needs to
check the items as below finally.
•When finished all wiring, check that all
connections are tight and secure.
•Double check the breaker, EMC filter,
fuses, etc. User is responsible for on the
main input power lines.
•Check that all cables are dressed neatly
outside the cabinet, and secured as
necessary.
•Check the ground connection again.
NOTE: THE INSTALLER SHOULD ENSURE THAT ALL CABLE CONNECTIONS TO THE
GENERATOR ARE SECURE, AND ALL CABLES EXTERNAL TO THE GENERATOR ARE
ADEQUATELY PROTECTED AGAINST ACCIDENTAL DISCONNECTION.
2.11 GUI SOFTWARE
The optional GUI utility software allows for
data communication between the generator
and an external computer. This provides a
“virtual console” with which user can release
all the command defined in the protocol and
verifies all the functions independently before
integrating the generator into their ultimate
system.
The GUI consists of the Analog Monitor
Section, the System Status Section, the Fault
Section, the Command Tab Section, the Com
Monitor Display, and the Menu.