OEM PCA-20 User manual

rev 2.14 / 2021 07 15
PCA-20 / PCA-25
capacitor charging modules
User manual
Warning! This equipment may be dangerous.
Please read the entire user manual carefully before using the product.
Important note. Module is sensitive to the reverse polarity applied to the
output. If you aren’t sure in your application, please contact the manufacturer for
the details.

2
Table of content
WARNINGS..................................................................................................................3
EXPLANATION OF SYMBOLS .........................................................................................3
OVERVIEW / DESCRIPTION ...........................................................................................4
COOLING.....................................................................................................................4
APPEARANCE...............................................................................................................4
CONNECTORS / PINS / INTERFACE SIGNALS ...................................................................5
INSTALLATION.............................................................................................................8
OPERATIONS ...............................................................................................................8
FAULTS .......................................................................................................................8
SPECIFICATIONS ..........................................................................................................9
DIMENSIONAL DRAWING...........................................................................................11
HOW TO ORDER?.......................................................................................................12
ENVIRONMENTAL PROTECTION..................................................................................12
NAME AND ADDRESS OF THE MANUFACTURER...........................................................12
EMC COMPLIANCE.....................................................................................................13
MEANS OF PROTECTION (MOPS) ................................................................................14

3
Warnings
Warning! The equipment is CLASS I ME EQUIPMENT.
To avoid the risk of electrical shock, the equipment must be
protectively grounded.
Warning! The equipment should only be used inside the medical
equipment, which has means to isolate its circuits electrically from the
supply mains on all poles simultaneously.
Warning! Do not open the enclosure. There are no user-serviceable
parts inside the device. Only authorized personnel is allowed to open
the device.
Warning! The equipment is not suitable for use in presence of a
flammable anesthetic mixture with air or with oxygen or nitrous oxide.
Explanation of symbols
Symbol
Description
Refer to instruction manual before handling
IPX0
Particles: No data available to specify a protection rating
Water: Non-protected
Warning, electricity
Protective earth terminal
The product should not be disposed of with household waste
Manufacturing year and month
Manufacturer’s name and address
INPUT
AC power input of the device
HV OUTPUT
Output positive and output negative of the device
INTERFACE
Interface (control) connector of the device

4
Overview / Description
PCA-20 and PCA-25 capacitor charging modules are high-frequency switch-mode
converters, which transform AC input to the regulated high voltage DC output to
charge capacitors.
Output power is 2000W and 2500W for PCA-20 and PCA-25 respectively. The
maximum output voltage level (VMAX) could be choosen from 300V to 1500V at
the moment of order. Higher output voltages are available upon request.
By default modules are optimized for partial discharge applications. Complete
discharge modifications are available on request.
Module is medical grade and complies with the requirements of IEC 60601-1 and
IEC 60601-1-2, so it can be used in medical systems without any modifications.
Cooling
Module is cooled with a built-in fan. No external cooling is required.
Appearance

5
Connectors / Pins / Interface signals
INPUT:
Blue wires (2pcs) –AC input (110-240VAC 50/60Hz for PCA-20 and
200-240VAC 50/60Hz for PCA-25)
HV OUTPUT:
Red wire –HV OUTPUT positive
Black wire –HV OUTPUT negative
Cable length warning
Despite the lengths of all cables can be customized on request,
we recommend to keep length of HV OUTPUT and INPUT cables as short as
possible (max 30-50cm). Usage of longer cables may result in increased
electromagnetic emission and/or decreased electromagnetic immunity of the
equipment and, correspondingly, in improper operation.
MOUNTING: M4 thread (x4)
Module should be mounted using these threads. Max. screw depth is 4mm.
GROUND: M4 thread
Module should be grounded using this thread. Max. screw depth is 6mm.
Grounding should be done before connecting the module to the mains.
Grounding policy
HV OUTPUT negative and INTERFACE return are internally connected to the
device ground (chassis). Other grounding policies are available on request.

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INTERFACE: MOLEX 0901301120
PIN (color)
DESIGNATION
DESCRIPTION
1 (-)
TEMP Test point
Module’s internal temperature test point.
By default the pin is unconnected, but can
be activated on request.
2,4,5,6 (black)
Ground
PINS 2,4,5,6 are connected to the circuit
ground of all internal circuits. The return
signal connection for all interface signals
should be made to one of these pins.
3 (yellow)
Voltage Program
A positive DC voltage applied to this pin
controls the output voltage set point.
0-10V corresponds to 0-VMAX
7 (blue)
INHIBIT
The high voltage output is inhibited or
enabled by this pin
0V –enabled; 5V or free-standing –
inhibited
8 (green)
Ready Indicator
This pin is pulled to the ground, when the
output voltage is equal to the program
voltage (or higher than the program
voltage)
9, 10 (red)
+15 V
These pins provide +15V DC that may be
used for status LEDs etc.
Maximum output current 40mA
11 (orange)
+5 V
This pin provides +5V DC that may be
used for status LEDs etc.
Maximum output current 40mA
12, 18
N/C
-
13 (white; black
mark)
Overtemp
(Fault Indicator 2*)
This pin is pulled to ground when some
failure occurs. In this case the high
voltage output will be also disabled.
Failures:
•overtemperature (approx. 80°C)
•mains interruption
This Fault indicator is also pulled to the
ground on start-up of PCA. In 2-5s, once
the start-up sequence is performed
completely, the signal is automatically
removed.
14 (white; blue
mark)
Overvoltage
This pin is pulled to the ground when
overvoltage occurs. In case of
overvoltage, the high voltage output will
be also disabled.
15 (green / brown)
End of Charge
Indicator
PIN15 is pulled to ground when the
output voltage is below the program
voltage.
Otherwise PIN15 is pulled to +15V.
16 (blue / white)
Secondary Inhibit
The HV OUTPUT is inhibited (when
+15V is applied) or enabled (when 0V is
applied or the pin is free-standing). This
pin should be used only to control parallel
operations of two or more power
modules.

7
17 (violet)
Voltage Monitor
The voltage at this pin is a signal
proportional to the instantaneous output.
0-10V corresponds to 0-VMAX
Current capability 1,5mA; Rout = 1kOhm
19 (white; red mark)
Fault Indicator *
This pin is pulled to ground when some
failure occurs. In this case the high
voltage output will be also disabled.
Failures:
•output short-circuit
•overvoltage
•output open-circuit
20 (transparent)
HV ON Indicator
This pin is pulled to the ground, when the
module provides power to a load.
* see also Faults section

8
Installation
•Only qualified personnel is allowed to install and perform the connection of PCA-20
(PCA-25) into customer’s system
•PCA-20 (PCA-25) is intended only for capacitor charging applications. The module
should only be used inside the medical equipment, which has means to isolate its circuits
electrically from the supply mains on all poles simultaneously
•Use four M4 mounting holes on the bottom side of PCA-20 (PCA-25) for fixation of the
module in your system. Refer to the Dimensional drawing section for their location.
Note: max. tightening depth of mounting screws should not exceed 4mm
•Connect the module to your system protective ground using provided M4 grounding
thread. Note: max. screw depth should not exceed 6mm
•Connect INPUT, HV OUTPUT and INTERFACE cables according to their functions
•Since module is air cooled, at least 50mm of free space should be provided both at the
suction and pressure sides of PCA-20 (PCA-25)
Operations
1. Disable the high voltage output using INHIBIT signal (PIN7 of INTERFACE)
2. Set the desired output voltage in working range (0V-VMAX) by applying a DC voltage
to the Voltage Program (PIN3 of INTERFACE)
3. Apply power to the module, wait 2-5s until module starts
4. Enable the high voltage output (PIN7 of INTERFACE)
5. After operations disable the high voltage output,
then disconnect module from the mains
Faults
Fault
Cause of the fault
Troubleshooting
Overvoltage (Pin 19, pin 14)
Voltage on the load exceeds
110% of VMAX level
The fault signal will disappear after
elimination of its cause and resetting
INHIBIT signal (inhibit and enable the
signal referring to the INTERFACE
description)
Short-circuit (Pin 19)
HV OUTPUT is enabled, but
voltage doesn’t increase in
predefined time (1.5-2.0s)
The fault signal will disappear after
elimination of its cause and resetting
INHIBIT signal (inhibit and enable the
signal referring to the INTERFACE
description)
Open-circuit (Pin 19)
There is no capacitive load
connected to HV OUTPUT
The fault signal will disappear after
elimination of its cause and resetting
(turning off and on) mains supply of the
charger
Overtemp (Pin 13)
Temperature of internal elements
exceeds the preset limit (approx.
80°C)
The fault signal will disappear automatically
after the temperature decreases below the
limit (approx. 75°C)
Mains interruption (Pin 13)
Mains has been interrupted (for
the time longer than ~1 period)
The fault signal will disappear after resetting
INHIBIT signal
Start-up (Pin 13)
PCA has been just connected to
the mains
Once initial start-up sequence is performed
completely, i.e. in 2-5s, the signal is
automatically removed

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Specifications
ELECTRICAL
PCA-20*
PCA-25
Input:
Input voltage*
110-240VAC,
50/60Hz
200-240VAC,
50/60Hz
Input current
<21A
<15A
Output:
Maximum output voltage
(VMAX)
user selectable in the range of
300-1500V (at the moment of order,
higher on request)
Nominal output power *
(partial discharge modifications, can
be achieved in regime 70-100% of
VMAX, rated input voltage, 25 °C)
2000W
2500W
Nominal output power *
(complete discharge modifications,
can be achieved in regime 10-100%
of VMAX, rated input voltage, 25 °C)
2000J/s
complete
discharge
modifications
are unavailable
for PCA-25
Output power deratings
Output power is derated when:
-operating voltage is lower
than 70% of VMAX (PD
modifications)
-operating voltage is lower
than VMAX (CD
modifications)
-ambient temperature is higher
than 25 °C

10
-input voltage is below
minimum rated voltage
Voltage stability
<0.5%
Voltage ripple/hysteresis
<0.5%
Efficiency
More than 85%
Safety:
Standards
IEC 60601-1 for electrical safety
IEC 60601-1-2 for EMC
PFC coefficient
0.98 (Active)
Leakage current
< 200μA
Isolations
see Means of protections section
Protections:
from open-circuit
from short-circuit
from overheating
from overvoltage
Cooling:
Forced air (build in fan)
Environment:
Operation temperature
+10… +40°C
Storage temperature
-20 … +60°C
Humidity
90%, non-condensing
*) PCA-20 can be used with 100-240VAC input until its average output
power is limited with 1800W.
MECHANICAL
Dimensions
see dimensional drawing below
Weight
approx 2.9kg

11
Dimensional drawing

12
How to order?
PCA-20-XXXX-YY or PCA-25-XXXX-PD, where:
-XXXX means VMAX voltage (user selectable in the range of 300V-1500V,
higher output voltages are available upon request). We would recommend to
pick VMAX as close as possible to your operating voltage in order to utilize
completely the output power of the device
-YY means either CD (complete discharge modification) or PD (partial
discharge modification); if YY is not specified PD modification will be
supplied
Examples (the most popular modifications):
P/N
Description
Certificates
PCA-20-300V-PD
110-240VAC input, 2000W/300V output, partial discharge
On demand
PCA-20-500V-PD
110-240VAC input, 2000W/500V output, partial discharge
IEC 60601-1:2005 +
A1: 2012
IEC 60601-1-2:2014
PCA-20-700V-PD
110-240VAC input, 2000W/700V output, partial discharge
On demand
PCA-20-800V-PD
110-240VAC input, 2000W/800V output, partial discharge
IEC 60601-1:2005 +
A1: 2012
IEC 60601-1-2:2014
PCA-20-1000V-PD
110-240VAC input, 2000W/1000V output, partial discharge
IEC 60601-1:2005 +
A1: 2012
IEC 60601-1-2:2014
PCA-20-1500V-PD
110-240VAC input, 2000W/1500V output, partial discharge
On demand
PCA-25-350V-PD
200-240VAC input, 2500W/350V output, partial discharge
IEC 60601-1:2005 +
A1: 2012
PCA-20-700V-CD
110-240VAC input, 2000J/s /700V output, complete discharge
On demand
PCA-20-1000V-CD
110-240VAC input, 2000J/s /1000V output, complete discharge
On demand
PCA-20-1500V-CD
110-240VAC input, 2000J/s /1500V output, complete discharge
On demand
Other modifications are available on request.
Environmental protection
Module should not be disposed of with household waste.
Please, dispose the module in accordance with the regulations for electronic waste
management in your country.
Name and address of the manufacturer
OEM Tech O.O.O.
Odoevskogo 129
220018 Minsk, Belarus

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EMC compliance
IEC 60601-1-2 Edition 4.0 (2014).
Environment of intended uses: Professional Healthcare Facility Environment
Declared EMC compliance (to be confirmed with test reports for every particular
part number):
Test
Standard
Class/ Severity level
Test result
Emission (IEC 60601-1-2 section 7.1-7.2)
Radiated emission
Freq. range: 30 - 1000 MHz
CISPR 11
Group 1 Class A
Complies
Conducted emission
Freq. range: 150 kHz -30 MHz
Group 1 Class A
120 VAC / 230 VAC
Complies
Harmonic current emission
IEC 61000-3-2
230 VAC
Complies
Voltage changes, Voltage
fluctuations and Flicker test
IEC 61000-3-3
230 VAC
Complies
Immunity (IEC 60601-1-2 section 8.9 & 8.10)
Immunity from Electrostatic
discharge (ESD)
IEC 61000-4-2
8 kV contact discharges &
15 kV air discharges
Complies
Immunity from radiated
electromagnetic fields
IEC 61000-4-3
3.0 V/m
80MHz 2.7 GHz, 80% AM, 1kHz
Complies
Immunity from
Proximity field fromwireless
communications equipment
IEC 61000-4-3
List of frequencies (Table 9),
from 9 V/m up to 28 V/m,
PM (18 Hz or 217 Hz), FM 1 kHz
Complies
Immunity from Electrical Fast
transient (EFT)
IEC 61000-4-4
± 2 kV on 230 VAC
Tr/Th –5/50 ns, 100 kHz
Complies
Immunity from Surge
IEC 61000-4-5
±1.0 kV DM/ 2.0kV CM
on 230 VAC
Tr/Th –1.2/50 (8/20) s
Complies
Immunity fromconducted
disturbances induced by RF fields
IEC 61000-4-6
3.0 & 6.0 VRMS on
230 VAC
0.15÷ 80 MHz, 80% AM, 1 kHz
Complies
Immunity from Voltage dips,
short interruptions and voltage
variations
IEC 61000-4-11
230 & 120 VAC mains;
0 % - 10 ms; 70% - 500 ms;
0% - 20 ms; 0% - 5sec
Complies
Note. The emission characteristics of this equipment make it suitable for use in industrial
areas and hospitals (CISPR 11 class A). If it is used in a residential environment (for which
CISPR 11 class B is normally required) this equipment might not offer adequate protection to
radio-frequency communication services.
Warning. Use of cables other than those specified or provided by the manufacturer of the
equipment may result in increased electromagnetic emission and/or decreased electromagnetic
immunity of the equipment and, correspondingly, in improper operation.

14
Means of protection (MOPs)
Declared MEANS OF PROTECTION (to be confirmed with test reports for every
particular part number):
Path
MOPs
Path
MOPs
Insulation of Input wires
2x MOPP @ 340Vpk
Input-to-Output
1x MOOP @ Working
voltage (depends on
modification)
Input-to-chassis
2x MOPP @ 340Vpk
Input-to-Interface
1x MOOP @ Working
voltage (depends on
modification)
Input-to-input (opposite
polarity before fuses)
1x MOOP @ 340Vpk
Output-to-chassis
Output negative is
intentionally connected
to the chassis
Mains part-to-chassis
1x MOPP @ 420Vpk
Output-to-Interface
Interface is galvanically
connected to the output
Mains part-to-secondary
circuits
1x MOOP @ Working
voltage (depends on
modification)
Insulation of Output wires
2x MOPP @ Output
voltage (depends on
modification)
Besides, module must be protectively grounded, which is considered as 1x MOPP.