Spellman DXM100 Series, Instruction Manual

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DXM100 MANUAL 1 118147-001 Rev. D
Chapter 1
I
NTRODUCTION
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 DXM100 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. The 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.
LOCAL Operating Features
(1) Output Control : Voltage, current filament limit
and preheat level are externally programmable over
the entire range from zero to maximum rating via 0-
10VDC 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 gradual increase 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 indicated 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 Factor 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 power supply 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.
T