Spellman MXR20PN24 User manual

Installation and User Guide
MXR20PN24 and MXR30PN24
Document Number: 81317-4.
Issue
B
C
1
Date
10/04/18
15/09/20
05/03/2021
Issuing Authority
I-5820
I-7349
10377P
Checked
Approved
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
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
No maintenance is required
Servicing should only be done by qualified personnel aware
of the hazards
If in doubt, return to supplier for servicing

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CHANGE HISTORY
Section
Reason for Change
Issue
All
Created from 80888-1 issue B
A
1
HV output cable paragraph added.
B
All
Revise and reformat for user guide
C
1
2.1
Mating cable ordering info and specs added
Regulatory approvals info added
1
Contents
1Unit Description ...............................................................................................................4
Mating Cable option...............................................................................................................4
1.1 Unit Ratings............................................................................................................................4
1.2 Environmental Conditions.......................................................................................................4
1.3 Dimensions.............................................................................................................................4
1.4 Mating Cable details...............................................................................................................6
2Safety................................................................................................................................6
2.1 Regulatory Approvals .............................................................................................................6
2.2 Meaning of Symbols...............................................................................................................6
3Installation of the HV Unit ...............................................................................................7
3.1 Initial Inspection......................................................................................................................7
3.2 Mechanical Installation ...........................................................................................................7
3.3 Electrical Installation...............................................................................................................7
3.4 Connections ...........................................................................................................................8
3.4.1 Analogue interface...........................................................................................................8
3.4.2 Serial interface.................................................................................................................8
3.4.3 High Voltage Connection..................................................................................................9
4Operation of the HV Unit ...............................................................................................10
4.1 Analogue Interface ...............................................................................................................10
4.1.1 Analogue Control Inputs.................................................................................................10
4.1.2 Analogue Output Monitors..............................................................................................10
4.2 HV On Indicators..................................................................................................................10

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1 Unit Description
The HV power units MXR20PN24 and MXR30PN24 are intended for use in mass spectrometry,
electron microscopy, capillary electrophoresis and electrostatic printing applications, they
consist of one aluminium chassis containing the high voltage power supply.
Control and monitoring of the units is accomplished via either analogue controls on the standard
unit or serial RS232 communication interface on the DCC2 option:
Analogue for MXR20PN24 and MXR30PN24
Serial for MXR20PN24/DCC2 and MXR30PN24/DCC2.
See section 3.4 for interface details and section 4 for control and monitoring.
Mating Cable option
A 2 meters HV output mating cable is available to order, with the following part number:
HVC30/1S/1279
Different cable lengths are available upon request.
Note: Customised versions of these units can be developed with an HV output cable
encapsulated into the unit, UL style 3873. Please consult with factory.
1.1 Unit Ratings
The units provide outputs rated as follows:
MXR20 ±20kVdc, 300µA max
MXR30 ±30kVdc, 300µA max
The units are designed for operation from 24Vdc ± 5%. The maximum rated input current is
1.25A.
1.2 Environmental Conditions
•The operating temperature range is 10°C to +50°C.
•Relative humidity rating (RH)% is 0% to 85% (non-condensing).
•Altitude 0 to 2000m above mean sea level
1.3 Dimensions
The chassis dimensions for all units: 240 x 215 x 52mm.
Units mass for all units is 4kg.
See outline drawing over page.

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1.4 Mating Cable details
Part
Manufacturer
Part description
Manufacturer part
number
HV cable
GES
HS30/Au PTFE
7331150
Plug, cable mount
GES
HV cable, 30kVDC, coaxial cable
3330007
2 Safety
The HV outputs of the units are considered hazardous, the protection against electric shock
provided by the units may be impaired if the units are not operated in accordance with the
instructions in this manual.
The units are contained in an earthed case with a screened HV output cable and the HV output
cable must be terminated safely before the units are operated.
This unit must be sourced with a double insulated or SELV 24 V dc supply.
The unit shall be properly bonded to the main protective earthing termination in the end product.
The units have 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:
a. Permissible Limits Tests with the unit installed in the end product.
b. Temperatures on accessible surfaces.
The units have not been the subject of a risk analysis; this should be done in the end product
application.
2.1 Regulatory Approvals
The unit is designed to meet the requirements of EN 61010-1, UL 61010-1 and CAN/CSA-22.2
No. 61010-1. Please consult the factory for further approval information.
2.2 Meaning of Symbols
SYMBOL
MEANING
Refer to manual before operating
Caution, possibility of electric shock
Protective conductor terminal (PE)

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3 Installation of the HV Unit
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 units for visible damage.
Note: Failure to comply with the above could compromise the safe operation of the units and
invalidate the warranty.
3.2 Mechanical Installation
The MXR units must be fitted in the end product and secured in position using screws.
The units must not be used in an environment with a level of pollution worse than Pollution
Degree 2.
The units are intended for use as a component and no surface of the units should be accessible
in the end product.
3.3 Electrical Installation
The units should only be connected to a Category II environment, the units are not intended for
connection to the mains. The power for the units should be sourced from a UL recognised
double insulated or SELV 24 V dc supply. There is no external fuse.
The units shall be properly bonded to the main protective earthing termination in the end
product via the chassis.
The input and output connectors are not intended for field connections and should only be
connected to internal wiring in the end product. All external circuits connected to High Voltage
outputs shall be Double/Reinforced insulated from any accessible parts.

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3.4 Connections
3.4.1 Analogue interface
Input connections are via a 12 way Molex KK5.08 series connector, part number 10-08-1121.
Input connector pin assignment table
Pin
Assignment
Type
1
IMON
analogue output
2
+24V DC
power input
3
VMON
analogue output
4
NC
5
NC
6
NC
7
VSET
analogue input
8
POL SET
digital input
9
SGND
signal ground
10
+24V DC RET
power input
11
NC
12
POL STATUS
digital output
3.4.2 Serial interface
The DCC2 units use 2 connectors, one for power input and one for data.
1. 24V power input connections are via a 2 way Molex Mini-fit Jr connector, Part Number 39-
30-1021.
Power connector pin assignments table
Pin
Signal Name
1
+24V DC
2
Ground return for +24V

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2. Control connections are via a 10 way ‘IDC Ribbon cable’ connector.
Input connector pin assignments table
Pin
Signal
Level/
Range
1
Transmit data (output) with respect to pin 2
Serial
2
Serial signal ground return (if required)
RTN (i)
3
Receive data (input) with respect to pin 2
Serial
4
NC
5
NC
6
NC
7
Opto-isolator input –[0mA = INHIBIT]
3V3 @ 6mA
5V @ 10mA
8
Opto-isolator signal return
9
Polarity Change Signal opto-isolator input - [0mA = -VE]
3V3 @ 6mA
5V @ 10mA
10
Polarity Change Signal opto-isolator signal return
Note:
(i) Take care in choosing suitable ground connection for pin 2.
3.4.3 High Voltage Connection
High Voltage output is via a GES HB30 high voltage receptacle for all versions.

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4 Operation of the HV Unit
4.1 Analogue Interface
The MXR units with an analogue interface use the following control and monitor signals.
4.1.1 Analogue Control Inputs
Control
Assignment
Pin
Levels
Voltage Control
VSET
7
0V to 10V for 0 to 30kV [0 –20kV], always positive
Rin >1MΩ
Polarity change
(digital)
POL SET
8
TTL: Low = positive HV
High/open = negative HV
4.1.2 Analogue Output Monitors
Monitor
Assignment
Pin
Levels
Current monitor
IMON
1
0 to 10V for 0 to 500uA, always positive
Rout = 10kΩ
Voltage monitor
VMON
3
0V to 10V for 0 to 30kV [0 –20kV] always positive
Rout = 10kΩ
Polarity monitor
(digital)
POL STATUS
12
positive HV: 0V (<200mV), source 1.5kΩ
negative HV: +24V, source 2.2kΩ
4.2 HV On Indicators
The MXR units use the following LEDs to indicate polarity when the power
supply is enabled and optional interlock is enabled:
•“HV +ve”
•“HV -ve”