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VICOR MicroPAC User Manual

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USER GUIDE | UG:102
Westcor
MicroPAC
March 2013
Contents
Page
Mechanical
Considerations
Product
Description
Technical
Description
Output Power
De-rating Curve
MicroPAC to MicroPAC
Power Shed Mode
Functional Description
No Load
Power Dissipation
with and without
12
13
16
17
Model
18
19
Before Using the MicroPAC Power Supply
Be sure to read this design guide manual thoroughly before using this product.
Pay attention to all cautions and warnings.
2
Incorrect usage could lead to an electrical shock, damage to the unit or a fire hazard.
2
4
5
6
7
8
9
Warning
Do not operate the without a secure protective earth (PE) lead
n
connected to the input power connector.
Do not operate the MicroPAC with AC input without inserting
n
a correctly rated Vac fuse.
Do not operate the MicroPAC with DC input without inserting a correctly
n
rated Vdc fuse.
Do not obstruct the fan air intake or air exhaust.
n
(Care should be taken when connecting cabling).
Do not connect or disconnect the output +Out or -Out cabling
n
while the MicroPAC is in operation.
Always make sure the output screws are properly torqued [15 inch-lb]
n
before applying power.
vicorpower.com
Applications Engineering: 800 927.9474
Page 1

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Summary of Contents for VICOR MicroPAC

  • Page 1: Table Of Contents

    Do not operate the MicroPAC with AC input without inserting J2 Customer a correctly rated Vac fuse. Interface Signals Do not operate the MicroPAC with DC input without inserting a correctly Mechanical rated Vdc fuse. Do not obstruct the fan air intake or air exhaust.

  • Page 2: Mechanical Considerations

    When considering a mounting location and/or orientation it is important not to restrict the air flow entering and exiting the MicroPAC. Air is drawn into the MicroPAC through the fan guard located next to the input power connector at the rear of the power supply and exhausts through the load side of the power supply next to the LED display panel.
  • Page 3 Field Replaceable Unit General shutdown MTBF Mean Time Between Failure Negative Temperature Coefficient Power Factor Correction Printed Circuit Board Power Supply MicroPAC MicroPAC Power Shed Mode Performance Criteria RoHS Restriction of Hazardous Substances vicorpower.com Applications Engineering: 800 927.9474 Page 3...

  • Page 4: Technical Description

    85 Vrms and 264 Vrms or 120 to 300 V dc source. The basic building blocks of the MicroPAC are an EMI filter, Power Factor Correction stage, cooling fan, and housekeeping, associated microcontroller circuits along with customer interfaces and galvanic isolated outputs and control signals.

  • Page 5: Output Power De-Rating Curve

    Output Power De-rating Curve The MicroPAC is designed to operate from a single electrical phase; as such it can be operated directly from a normal wall outlet socket. These sockets are normally rated for 12 A continuous current draw and 15 A peak current draw. With this in mind it is necessary to institute a power de-rating curve to maintain the operational range of the MicroPAC within these boundaries.

  • Page 6: Configuration

    MicroPAC. If individual Micro-PAC’s are configured in an array it is necessary to make sure all MicroPAC are powered up at the same time. Where possible the same AC source should be used to power all MicroPAC's in the array.

  • Page 7: Power Shed Mode

    Introduction to the MicroPAC Power Shed Mode The aim of the power shed mode is to increase the overall light load efficiency of the MicroPAC. This is achieved by minimizing the power dissipation when light load or no load conditions are present on the MicroPAC output.

  • Page 8: Power Shed Mode Functional Description

    On power up with the power shed function enabled all four output channels are initially enabled, channel one to four LED’s should be illuminated. Circuitry internal to the MicroPAC monitors the amount of current drawn from the MicroPAC and is proportional to the customer load.

  • Page 9: Power Shed Mode

    Shoot First, Ask Questions Later When the MicroPAC is operating in categories 1 to 3 and detects an increase in load current applied to the output which incurs into the next power band the internal microcontroller will turn all outputs on, regardless of the actual amount of load added.

  • Page 10: Field Replacement Unit

    Field Replacement Unit Figure 6. Fan Assembly Table 3. Westcor Field Replacement Unit Item Description Part Number ASSY FAN AVC DV-12M 40X28MM 14.4 CFM 10-130240-01 ASSY FAN SANYO DENKI -40C J-SPEED 40X28MM 18.4 CFM 10-130241-01 vicorpower.com Applications Engineering: 800 927.9474 Page 10...
  • Page 11 15. Replace the four screws (ref 2). The torque on these screw is 5-6 inch-lb 16. Never apply power to the MicroPAC until all of the reassembly is complete. vicorpower.com Applications Engineering: 800 927.9474...

  • Page 12: Customer Interface

    Customer Interface Figure 7. Pin Designation Input Power Connector Pin Designation Live (L1) (AC Use Only) Neutral (L2) Protective Earth (PE) Figure 8. Pin Designation Input Power Connector Pin Designation + DC (L1) (DC Use Only) - DC (L2) Protective Earth (PE) Figure 9.

  • Page 13: J2 Customer Interface Signals

    The fault LED previously illuminated a solid yellow due to the overtemperature warning will now begin to flash at approximately 2 Hz. All outputs of the MicroPAC will be automatically disabled. The power supply will go into a shutdown mode;...
  • Page 14 This pin is normally at +5 V potential when referenced to Pin 2. If this pin is shorted to Pin 2 the MicroPAC will enter a low power standby mode. In this mode all outputs will be disabled, the main PFC power supply will be shut-down along with the fan.
  • Page 15 J2 Customer Interface Signals (Cont.) Figure 10. Output TTL logic Signals ED/ 1 ( Pin 3) +5 V ( Pin 1) 0 V ( Pin 2) BCM 1 DISABLED AC_ OK ( Pin 6) ED/ 2 ( Pin 10) BCM 2 DISABLED FAN_ FAULT ( Pin 9) ED/ 3 ( Pin 5) BCM 3 DISABLED...

  • Page 16: Mechanical

    Mechanical Physical Weight 2.15 Lbs. Figure 11. Physical Dimensions/ Markings vicorpower.com Applications Engineering: 800 927.9474 Page 16...

  • Page 17: Front Panel

    Front Panel PWR /AC_OK / STANDBY LED Panel Figure 12. LED Indicator Panel Customer Interface Connector CH 1-4 DC_OK LED FAN_FLT /OVER TEMP/OVER TEMP SHUTDOWN GSD / CH 1 - 4 Disable Table 5. Function Function Color Color LED Function ED 1 Orange GSD (General Shutdown)

  • Page 18: Numbering Scheme

    Model Numbering Scheme Model Number: UPa - bbbb - cde Where a = number of outputs from 1 to 4 b = equals a character denoting output 1 voltage and power b = equals a character denoting output 2 voltage and power b = equals a character denoting output 3 voltage and power b = equals a character denoting output 4 voltage and power One character will denote a null for an output...

  • Page 19: Specifications

    Specifications Input Input Voltage 85 – 264 Vac DC Rating: 120 Vdc – 300 Vdc (¼” x 1¼”) Cooper Bussmann, (5 x 20 mm) Littelfuse, ABC-15, 216 series, External Fuse rated 15 A rated 16 A Littelfuse, (¼” x 1¼”) Littelfuse, 505 series, 505 series, rated 16 A/500 Vac...

  • Page 20: Electromagnetic Compatibility

    Specifications (Cont.) Environmental Storage temperature -40°C ~ +85°C Operating temperature -20°C ~ +55°C (-20°C to +65°C @50% load) (Extended temperature range is available; -40°C to +55°C) (+65°C @50% load) Functional shock MIL-STD 810F Method 516.5 procedure 1, terminal peak saw-tooth wave, 40G 11 mS Vibration MIL-STD 810G for minimum integrity vibration Humidity...
  • Page 21 Per Vicor Terms and Conditions of Sale, the user of Vicor products and components in life support applications assumes all risks of such use and indemnifies Vicor against all liability and damages.

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