SpellmanHV DGM945 Modular High Voltage Supply for Image Intensifiers


  • Multiple Outputs
  • Three Control Inputs
  • Three Optical Encoders
  • RS-232 Serial Port for Control and Monitoring
  • OEM Customization Available

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

CE ROHS RU Marking

Modular High Voltage Supply for Image Intensifiers

Spellman’s new DGM945 high voltage power supply for Image Intensifier applications continues to set the stan­dards for high voltage power conversion technology. The DGM945 also has inputs to allow measurement ofthe photocathode current and getter current. The photo-cathode measurement has two ranges : sensitive range: 0 to 50nA and a standard range: 0 to 15µA. The sensitiveinput is used to provide a monitor output with a sensitivityof 0.1V/nA. The getter input allows measurement of the getter current, indicating if the Image Intensifier tube is still holding a good vacuum and is without gases causing ions.

Monitoring of all output voltages is possible via local test points or over the serial interface. The unit can also storeup to eight modes of operation. The output voltages are independently adjustable in each mode either by the rotary encoders built into the unit or via the serial interface.

The DGM series can be adapted to suit specific requirements with a wide selection of multiple output voltages and power capabilities in a compact package, making it perfect for the OEM user.

Typical applications

  • Radiology
  • Cardiology
  • Neuroradiology
  • Night Surveillance
  • Non Destructive X-Ray Inspection
  • Image Intensifiers


(Ref. 128114-001 REV. C)

Input Voltage:

+24Vdc ±10%

Input Current:

500mA maximum

Programmable Output Voltages:


Output Voltage: 30kV

Output Current: 5µA continuous (50µA peak)

Electrode 1:

Output Voltage: 10V to 350V

Output Current: 0 to 10µA

Electrode 2:

Output Voltage: 200V to 2kV

Output Current: 0 to 10µA

Electrode 3:

Output Voltage: 2kV to 20kV

Output Current: 0 to 20µA

Electrode 4:

Output Voltage: 2.7kV

Output Current: 0 to 10µA



Temperature Coefficient:



<0.3% over 8 hrs


Operating: +5°C to +55°C

Input Connector:

15 pin male sub D


5.47”H x 5.67”W x 1.97”D (139mm x 144mm x 50mm)


2.86 lb. (1.3kg)

Regulatory Approvals:

Compliant to EEC EMC Directive. Compliant to EEC Low Voltage Directive.


Pin Signal Signal Parameters
1 0V Signal Ground
2 RxD RS-232 receive data input
3 TxD RS-232 transmit data output
4 0V Signal Ground
5 0V Signal Ground
6 UC2 Mode select input 2
7 0V Signal Ground
8 0VP Power return
9 DTR RS-232 Data terminal ready output
10 CTS RS-232 Clear to send input
11 N/C N/C
12 Ipc Ipc = 10nA / volt
13 UC3 Mode select input 3
14 UC1 Mode select input 1
15 24V Power input

테이블 및 다이어그램



DGM945 High Voltage Power Supply (Image 2)


DGM945 High Voltage Power Supply (Image 3)


DGM945 High Voltage Power Supply (Image 4)