XRB502 Monoblock® Industrial X-Ray Generators

  • Integrated HV Supply, Filament Supply, X-Ray Tube, Beam Port and Control Electronics
  • Compact & LIghtweight
  • Universal Input, Power Factor Corrected
  • Can be Mounted in Any Physical Orientation
  • Analog Control Interface and Standard RS-232 Digital Interface

160kV, 500W X-Ray Source

Spellman’s XRB502 Series of Monoblock® X-Ray sources are designed for OEM applications powering its internal X-Ray tube up to 160kV at 500W. Features like universal input, small package size and a standard analog and RS- 232 digital interface simplify integrating the XRB502 into your X-Ray system. Standard models are available either with fan shaped or cone shaped beam geometries. Proprietary emission control circuitry provides excellent regulation of X-Ray tube current, along with outstanding stability performance.

Typical applications:

  • X-Ray Scanning: Food Inspection
  • Fill Level Confirmation
  • Security Applications
CE Marking


(Ref. 128087-001 REV. F)

X-Ray Characteristics:

Tube Type: Glass tube, Tungsten target, Be filter

Focal Spot: 0.8mm x 0.8mm, 0.5mm x 0.5mm

Beam Filter: 0.016˝ thick 6061 Al, ±0.0045˝ 0.125˝ Ultem

Beam Geometry: Asymmetrical fan up to 80° x 30°, cone up to 40°

Input Voltage:

90-264Vac, 50/60Hz, 6.5A max; 12Vdc @ 5A

X-Ray Tube Voltage:

Nominal X-Ray tube voltage is adjustable between 80kV to 160kV

X-Ray Tube Current: 

0.25mA to 6mA over specified tube voltage range

X-Ray Tube Power:

500W, maximum

Voltage Regulation:

Line: ±0.1% for a ±10% input line change of nominal input line voltage

Load: ±0.1% for a 0.3mA to 6mA load change

Voltage Accuracy:

Voltage measured across the X-Ray tube is within ±1% of the programmed value

Voltage Risetime:

Ramp time shall be <1 second from 10% to 90% of rated output 

Voltage Overshoot:

Within 5% of rated voltage in <10ms

Voltage Ripple:

0.1% p p of rated voltage @ ≤1kHz

Current Regulation:

Line: ±0.1% for a ±10% input line change of nominal input line voltage

Load: ±0.5% @ 75-160kV, 0.3mA to 6mA

Current Accuracy:

Current measured through the X-Ray tube is within ±2% of the programmed value

Current Risetime:

<1 second from 10% to 90% of rated output 

Arc Intervention:

4 arcs in 10 seconds with a 200ms quench = Shutdown

Filament Configuration:

Internal high frequency AC filament drive with closed loop filament emission control

Analog Interface:

0 to 10Vdc ground referenced signals

Digital Interface:

RS-232 interface.

Control Software:

A demo GUI for engineering evaluations will be provided for the RS-232 digital interface upon request.

Interlock Signals:

A hardware interlock functions in both analog and digital programming modes.

Operating Temperature:

0°C to +40°C

Storage Temperature:

-40°C to +70°C


10% to 95% relative humidity, non-condensing


Heat exchanger w/fan and oil pump, powered from DC MONOBLOCK®

Input Line Connector:

3 pin, Phoenix Contact 1829167

Analog Interface Connector:

10 pin, Phoenix Contact 1755503

Digital Interface Connector:

9 pin D connector, male

Grounding Point:

8-32 ground stud provided on chassis


See outline drawing


125lbs (56.7kg)


Can be mounted in any orientation.

X-Ray Leakage:

Not to be greater than 0.5mR/hr at 5cm outside the external surface per FDA 21 CFR 1020.40 and OSHA 29 CFR 1020.96

Special Features/Requirements:

55dB SPL @ 1m with fans stopped on heat exchanger High stability X-ray output: Dose rate variations <1%

Regulatory Approvals:

Compliant to 2004/108/EC, The EMC Directive and 2006/95/EC, The Low Voltage Directive.


Pin Signal Parameters
1 Line 100-264Vac
2 Removed N/C
3 Neutral Neutral
4 Removed N/C
5 Spare N/C
6 Spare N/C


Pin Signal Parameters
1 X-Ray Signal +24Vdc =Enable X-Ray, 0Vdc/open = Disable X-Ray,
2 X-Ray Signal Return Signal Return
3 N/C N/C
4 kV Monitor 0-10Vdc = 0 to 178kV, Zout = 10kΩ
5 Signal Ground Signal Ground
6 mA Monitor 0-10Vdc = 0 to 3.4mA, Zout = 10kΩ
7 Fault Signal Open collector, High (Open) = No Fault, 35Vdc
@10mA maximum
8 HV ON Lamp Relay n/o Relay Normally Open, 50Vdc @ 1A maximum
9 HV ON Lamp Relay common Relay Common, 50Vdc @ 1A maximum
10 HV ON Lamp Relay n/c Relay Normally Closed ,50Vdc @ 1A maximum


Indicator Signal Name Condition Illuminated When...
LED 1 OT Over temperature occurs
LED 2 ARC FLT Arc fault occurs
LED 3 UV Low kV occurs
LED 4 OV High kV occurs
LED 5 UC Low mA occurs
LED 6 OC High mA occurs
LED 7 X-RAY ON X-Rays are enabled
LED 8 PWR Power is ON

Tables & Diagrams



XRB502 X-Ray Generator (Image 2)


XRB502 X-Ray Generator (Image 3)


XRB502 X-Ray Generator (Image 4)


XRB502 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.