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High Voltage Power Supply
XMPF10N5/24
SAFETY AND INSTALLATION
INSTRUCTIONS
Document Number: 81234-4.
Issue A
Date
23/01/18
Issuing Authority
I-5650
Checked
Approved
Tel: +44 (0)1798 873986
Fax: +44 (0)1798 872479
E-mail : hvsales@spellmanhv.co.uk
Broomers Park, Broomers Hill Lane
Pulborough, W. Sussex, RH20 2RY
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SAFETY
DANGER
HIGH VOLTAGE
RISK OF ELECTROCUTION
Observe extreme caution when working with this equipment
High voltage power supplies must always be connected to
protective earth
Do not touch connections unless equipment is turned off and
the capacitance of both the load and power supply are
grounded
Allow adequate time 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 only be done by qualified personnel aware
of the hazards
If in doubt, return to supplier for servicing
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Contents
1 Unit Description ........................................................................................................... 3
2 Safety ............................................................................................................................ 3
3 Installation .................................................................................................................... 4
4 Input and Output Connections ................................................................................... 5
1 Unit Description
The XMPF10N5/24 unit consists of one chassis containing the high voltage power supply.
The dimensions are 170mm x 70mm x 30mm
The unit is designed for operation from 24Vdc ± 10%. The maximum rated input current is 500mA.
The unit provides an HV Cathode output rated at -10kV, 5W. With a floating filament intended to drive an Xray tube with a grounded anode, rated at 0V to 3.5Vac referenced to the Cathode Output, 0.42A max.
All control and monitoring is accomplished via a 15 way ‘D’ connector which also provides input power to the
unit.
Operating Temperature is 5C to +40C ambient for normal operation.
The mass of the module is nominally 2kg.
2 Safety
The HV output of the unit is hazardous and the conditions of this manual must be complied with to maintain
safety. Operating the unit in a manner not specified in this manual may impair the protection against electric
shock provided by the unit.
The unit is contained in an earthed case, the system protective earth shall be provided to the chassis. The
case of the unit shall be properly bonded to the main protective earth termination in the end product.
The unit has been evaluated for use in a Pollution Degree 2, Installation Category II environment.
Consideration should be given to conducting the following tests with the unit installed in the end product:
Dielectric Voltage Withstand Test, between live parts of the unit and the end product chassis.
Permissible Limits Tests with the unit installed in the end product.
Temperatures on power electronic components, transformer windings and accessible surfaces.
There is no relevance to a risk assessment carried out as part of the CE testing on the HV unit. It is
recommended that a full assessment is carried out in the end application.
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This symbol on the unit means “read the manual before powering the equipment”.
This symbol on the unit means “Caution; risk of electric shock”.
3 Installation
3.1 Initial Inspection
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.
After unpacking, inspect the panel and chassis for visible damage.
Note: Failure to comply with the above could compromise the safe operation of the unit and invalidate the
warranty.
3.2 Mechanical Installation
The unit should only be used in a Pollution Degree 2 Installation Category II environment.
The input and output connectors are not intended for field connections and should only be connected to
internal wiring in the end product. The unit is intended for use as a component and no surface of the unit
should be accessible in the end product.
3.3 Electrical Installation
The unit must be terminated safely before operation. Hazardous voltages will be exposed if the connector is
removed whilst the unit is enabled.
The 24Vdc input shall be provided by a double insulated, or SELV, UL recognised power supply.
Circuits connected to the unit shall be provided with rated insulation to IEC/UL61010-1.
The unit must be switched off for at least one minute before disconnecting any of the connectors.
!
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4 Input and Output Connections
4.1 The low voltage signal connections are made by a 15 way ‘D’ connector; the pin out is shown below.
Pin #
Signal Name
Range
1
+24V input
2 Power Ground
3 Filament (direct program)
4 Signal ground
5 HV enable
Digital input
6
Not used
7 Cathode voltage program output
0 – 10V from internal pre set
8
Cathode voltage program input
0 – 10V input
9
Cathode voltage monitor
0 – 10V output
10
Emission current monitor
0 – 10V output
11
Filament current monitor
0 – 10V output
12
Emission current program input
0 – 10V input
13
Emission current program output
0 – 10V from internal pre set
14
Signal ground
15
Pre-set maximum filament current set value
4.2 Output:
The HV output is a flying lead consisting of 2 Reynolds 18kV rated FEP insulated wire, 1.02mm overall
diameter. Conductors 19/40AWG. Overall length 500mm. The two wires are sleeved together.
Pin
Name
N/A
Filament+/Cathode
N/A
Filament-/Cathode
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