VMX Series

  • Custom Designed Specifically for Mammography Applications
  • Fast Settling Helps Minimize Patient Radiation Exposure
  • Dual Speed Starter, Boost/Brake Capability
  • RS-232 and Optional Ethernet Interfaces
  • Low Cost, Value Added, Modular Design

5kW Mammography X-Ray Generators

Spellman’s VMX redefines the standard for high perfor­mance, low cost Mammography X-Ray generators. The VMX was born from an integrated, high performance, value added design perspective so there’s no need to compromise critical specifications to meet ever demand­ing system price targets.

The 40kV/5kW X-Ray generator integrates a dual filament power supply and a dual speed starter. A DC current source filament power supply provides fast rise times with stable and accurate X-Ray tube emission currents. The solid encapsulated high voltage output section eliminates oil concerns while reducing the effects of environmental humidity and contamination.

Flexibility in interfacing is provided via RS-232 and optional Ethernet connectivity. The VMX supports advanced mammography application features including Smart AEC Exposure, Automatic Filament Calibration, Tube Anode Heat Calculator and user configurable Tube Library. Compact, full featured,high performance, low cost. Spellman’s VMX, the next generation Mammography X-Ray generator.

Specifications

(Ref. 128092-001 REV. H)

Input Voltage:

200-240Vac (±10%), single phase, 50Hz/60Hz

Input Current:

Minimum 35A service recommended for 5kW operation

External EMC Filter (Schaffner FN2070-36-08-36A) required to meet CE/EMC specifications – Not provided with the generator

Mains Contactor – Not provided within the generator. Customer is responsible for mains safety disconnection.  

Output Voltage

Output Voltage Range: 20kV to 40kV 

Polarity: Positive, grounded cathode X-Ray tube

Accuracy: Within 1% of programmed values

Reproductibility: <0.5%

Settling Time: <10ms

Ripple: ≤ 1% 

Stability: ≤ 0.01% per 8 hours

Temperature Coefficient: ≤ 100ppm/°C

Output Current/Power

Output Current Range: 10mA to 200mA

Output Power: 5kW @ 0.1 second loading time 

Maximum mAs:

600mAs

Exposure Timer:

5ms-10 seconds

Accuracy:

Within 2% of programmed values measured after mA rises to stable DC level

Reproductibility:

 <0.5%

Settling Time:

<10ms

Filament Configuration:

DC filament drive: self corrected filament preheat settings with closed loop emission control and smart learning algorithm

Filament Output:

0-6 amps at a compliance of 5.5 volts, maximum

Dual Speed Starter:

High speed (180Hz) and low speed (60Hz) can be configured via the serial interface.

Boost and Brake capability provided.

High Voltage Connector:

60kV, Claymount CA-3 type or equivalent

Optional Communication Interface:

Ethernet (RJ45)

Grounding Point:

M5 ground stud provided on chassis

Environmental:

Temperature Range:

Operating: 10°C to 40°C

Storage: -40°C to 85°C

Humidity:

20% to 85% RH, non-condensing.

Cooling:

Convection cooled, no internal fans. Forced air cooling not required

Dimensions:

9.38. H X 6.6. W X 12. D (237.5mm x 167.6mm x 304.8mm)

Weight:

<22 pounds (10kg 

Regulatory Approvals:

VMX40P5 platform is designed to meet applicable requirements of IEC60601-1 and IEC60601-1-2, IEC60601-2-7 and IEC60601-2-45. Spellman will support customers needs when system certification is needed (subject to additional cost and lead time). UL/CUL recognized, File E242584. Compliant to 2002/95/EC, RoHS.

Application Features:

  • 2 point/3 point exposure modes
  • AEC/Smart AEC exposure modes
  • Automatic filament current calibration
  • Tube anode heat calculator
  • User configurable tube library

TB2 ROTOR INTERFACE

Pin Signal Parameters
TB2-1 PHASE To tube auxiliary winding
TB2-2 RUN To tube principle winding
TB2-3 COM To tube common winding
TB2-4 GROUND To tube housing ground

TB3 TUBE AND INTERLOCK INTERFACE

Pin Signal Parameters
TB3-1 SMALL FIL Connection to tube small filament
TB3-2 COMMON Connection to tube filament common
TB3-3 LARGE FIL Connection to large filament
TB3-4 GROUND Generator chassis for cable shield connection
TB3-5 Interlock 2+ Used if tube has separate thermostat switch. Open = OVER TEMP. (short terminals if not used)
TB3-6 Interlock 2- Used if tube has separate thermostat switch. Open = OVER TEMP. (short terminals if not used)
TB3-7 Interlock 3+ Used if tube has cooling circulator flow switch. Open = NO FLOW. (short terminals if not used)
TB3-8 Interlock 3- Used if tube has cooling circulator flow switch. Open = NO FLOW. (short terminals if not used)
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. Closed = OK 24Vdc @ <1A typical
TB3-10 Safety Interlock- User signal (Contact Closure) for safety interlocks such as door interlocks. Open turns HV OFF, or inhibits HV from being generated. Closed = OK 24Vdc @ <1A typical
TB3-11 Contactor Coil+ Option for contactor coil control
TB3-12 Contactor Coil- Option for contactor coil control
TB3-13 Spare N/C
TB3-14 Spare N/C
TB3-15 Tube Current+ Tube current flows out from this pin
TB3-16 Tube Current- Tube current flows into this pin

VMX STANDARD SYSTEM INTERFACE—JB1 25 PIN MALE D CONNECTOR

Pin Signal Parameters
1 GND Signal Ground
2 +5Vdc Out +5Vdc, 100mA max.
3 RS-232 Tx Out RS-232 Transmit
4 RS-232 Rx In RS-232 Receive
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 to boost the rotor. Contact connection
to pin 24. Closed = PREP, the filament is placed in
preheat mode
6 READY Generator signal to user to indicate the rotor runs to
speed and the generator is ready for X-Ray exposure
Open Collector. Low/Active = Ready
7 ROTOR SHUTDOWN User signal to brake the rotor drive
8 EXPOSURE User signal (Contact Closure) to generator to
generate X-Rays. Filament is boosted, and high
voltage is generated after the boost time. Contact
connection to pin 24. Closed = Exposure
9 X-Ray ON 75% Status Transistor output to indicate X-Ray ON status
synchronized with 75% of kVP setting point.
10 X-Ray ON Status Transistor output to indicate X-Ray ON status
synchronized with kV start up.
11 N/C N/C
12 X-Ray SHUTDOWN/AEC User signal to generator to rapidly turn HV OFF and ON during serial exposure sequence
13 RS-232 ISO Ground Isolated ground from RS-232 transceiver IC
14 HVG FAULT Status Generator signal indicating generator fault. Open
collector transistor output. Low/Active = Fault
15 Status Bit 1 3 bit status lines for up to 6 status messages. See separate matrix descibing functionality. Open Collector. Low/Active = Message
16 Status Bit 2
17 Status Bit 3
18 N/C N/C
19 N/C N/C
20 kV Monitor Signal from generator. 0-10V = 0-40kV. Zout = 1kΩ
21 Emission Monitor Signal from generator. 0-10V = 0-200mA. Zout = 1kΩ
22 Filament Current Monitor Signal from generator. 0-10V = 0-6A. Zout = 1kΩ
23 Program/Monitor Return Ground for reference of program and monitor signals
24 +24Vdc Out For connection to PREP and EXPOSURE control
relay coils
25 SHIELD/GND For connection of interface cable shield to generator
chassis ground

Tables & Diagrams

DIMENSIONS: in.[mm]

FRONT VIEW

VMX X-Ray Generator (Image 2)

TOP VIEW

VMX X-Ray Generator (Image 3)

BOTTOM VIEW

VMX X-Ray Generator (Image 4)

SIDE VIEW

VMX X-Ray Generator (Image 5)

Note: All specifications are subject to change without notice. Please consult the PDF version of this datasheet for the most up-to-date revision.