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VXI-C size 6025

WIENER C-size VXI mainframes of the 6000 deliver highest performance and reliability. Incorporating high density & lowest noise power supply technology the 6000 VXI series is the best choice for any demanding test and measurement VXI application.

The VXI6025 “front-load” VXI-C mainframe is based on the 6000 series technology but  provides full front side accessibility in a very compact chassis design. Both the power supply as well as the cooling fans are accessible and removable from the front side.
Featuring microprocessor controlled power supplies and fan trays it provides advanced integrated diagnostic and monitoring capabilities.  A unique flexibility is given by the modular packaging approach.
Different power supply configurations as well as a variety of crate options are offered.


UEV 6025 VXI-C Bin

  • 19” enclosure for 13 VXI modules 6U x 340mm,  modular design with front removable fan tray and power supply
    • Version A for medium power (max 2000W) with 8.5U height
    • Version B for high power (max 4000W) with 10U height
  • Very rugged steel-aluminum construction features 5mm thick heavy duty side plates with zero-tolerance countersink screw positioning of all horizontal rails,
  • Monolithic 13 slot 6U VXI backplane (J1/J2), 8 layer PCB, active termination, active automatic-daisy-chain, VXI-4 backplane on request
  • Optional up to 8 temperature sensors above VXI modules
  • Dimensions:  19” (482.3mm) x 8.5U or 10U x 600mm [whd], weight: 12kg … 17kg

UEL 6025 EX Fan Tray

  • Designed to provide superior cooling of VXI modules in bottom-to-top air flow
  • Equipped with 6 individually controlled long-life DC fans, MTBF >60,000h/40º C
  • Integrated fan speed and thermal monitoring, adjustable fan speed
  • Microprocessor controlled with alphanumeric high-visibility LED display for all fan tray, bin and power supply parameters (voltages, currents, power, temperatures, set-up data, etc…)
  • Built in Ethernet interface for remote monitoring and control
  • Dimensions:
    Version A: 430mm x 110 mm x 55mm [whd], weight: ca. 2 Kg
    Version B: 430mm x 44 mm x 490mm [whd], weight: ca. 9 Kg

UEP 6025 Power Supply

  • Front-load high density power supply in WIENER “Cavity-VHF” switching technology with excellent RF-shielding, optionally ultra low noise < 3mVpp (all voltages <12V), other rails <10mVpp
  • Modular and expandable design with self-ventilated universal power blocks, individually sensed and floating DC outputs
  • Micro-processor controlled, programmable voltage adjustment, current limits and over-/ under voltage trip off points, temperature limits
  • Self protected against any failure as under/over voltage, over current, over temperature, etc
  • 94V – 260V world-wide auto-range AC input, with power factor correction, CE-conformity
  • High power density, up to 2kW (Version A) or 4kW (Version B) DC output power
  • Dimensions:
    Version A: 430mm x 66mm x 523m [whd], weight: from 12 to 20Kg,  depending on the number of power modules
    Version B: 430mm x 58mm x 552m [whd], weight: from 15 to 30Kg,  depending on the number of power modules

Ordering Information

Standard configurations (others possible by request).

Crate VersionBackplane+5V+12V-12v-5.2V-2V+24V-24VHeight
VXI 6025 C630VXI115A23A23A115A40A15A15A8.5U
VXI 6025 C631VXI115A23A23A115A115A15A15A8.5U
VXI 6025 C650VXI115A45A45A115A115A15A15A10U
VXI 6025 C651VXI230A45A45A115A115A15A15A10U
VXI 6025 C652VXI230A45A45A115A115A30A30A10U

Technical Information

UEV 6025 VXI Front-Load Bin

The 6025 bin is a VXI-C-size mainframe configured for front-load cooling fan and power supply. Two versions are available for either medium or high power. The total height of the 6025 bin is either 8.5U ( medium power version A) or 10U (high power version B).

Common and / or isolated backplane ground connections can be user selected.

The 6000 series crates offer excellent electrical safety, i.e. no AC mains wiring is inside the bin and fan tray. All power comes from well-isolated DC low voltages (EN60950, UL1950).  A Power Protect Memory (PPM) further protects the crate by preventing incompatible power supplies from powering up.

Dimensions of 6025 standard bins

Versiopn A (C-size (6U/340mm): 19” (483mm) x 8.5U (375mm) x 600mm [whd]
Version B (C-size 6U/340mm):  19” (483mm) x 10U (444mm) x 600mm [whd]


  • Temperature sensors option

6U VXI Backplane

Hartmann Elektronik monolithic multi-layer 13 slot VXI bus with active automatic daisy chain and passive or active termination. Outfitted with 96pin DIN J1/J2 connectors as per VXI specification:
Power per slotVXI C sizeVXI D size
( at  20°C / 70°C)13 slot J1/J2 13 slot J1/J2/J3
5V14A / 10.5A24A / 18A
+/-12V2A / 1,5A4A / 3A
-5,2V10A / 7.5A20A / 15A
-2V4A / 3A10A / 7.5A
+/-24V2A / 1.5A4A / 3A

UEL6025 Fan Tray / Control Interface

The UEL6025 is the plug in fan and control unit for the 6025 VXI mainframe family.

All UEL 6025 fan trays are outfitted with long life individually controlled DC fans for front to top air flow operation.  Depending on version different high performance DC fans are used.

UEL 6025 fan trays have a built-in microprocessor for fan control, communication with the power supply and display / networking. Default version is the EX type which has a high visibility alphanumeric display and combo interface (Ethernet, CAN-bus, RS232) for remote monitoring and control. This interface allows the crate, including power supply, fan tray and bin temperature sensors, to be controlled and monitored remotely via Ethernet. 

A built in web server allows the crate health to be monitored via a web browser on a PC attached to the appropriate network, while SNMP provides a convenient way to tailor a control system to a given application. All network connectors are RJ45 type.

  Version A
 EMB Pabst 614J/2HHP
Version B
EMB Pabst 4114NH3 or NH4
Maximim Static Pressure: 66 mm H2O column 68 mm H2O column
Max. Speed of Rotation: >15000 RPM >6000 RPM
Maximum Air Flow (6 fans) 270 CFM 1,500 CFM
Operating Voltage: 0-24VDC, regulated and controlled by microprocessor
Optimum Operating Range: 10 - 19mm H2O 25 - 38mm H2O
Operating Temperature: 0... 65°C
MFOT (Maintenance Free Operation Time)  60 000 hours at 40°C ambient

Variable fan speed is manually or remotely selectable from 1200 to >max speed. In case optional bin temperature probes are installed the fan can run in temperature-controlled mode. Running with lower fan speed all temperatures are monitored. Exceeding the first limit (user defined, default 45°C) all fans run with maximum speed in order to provide full cooling. In case the temperature passes the second limit the power supply switches off.

Adjustable “after-running” of fans continues further cooling of VXI instruments after the chassis is powered off.

The fan trays can be prepared for hot swapping.

Front panel outfitted with 4 status LED showing:

Status  Green:   all values inside tolerance
Fan fail Yellow: one or more fans fail
Overheat Yellow: power supply overheated
Sys fail Red: VMEbus generates sysfail

A manual SysRest button on the front panel is recessed to avoid it being pressed accidentally.

All UEL6025 fan tray monitoring can be set to Programming Mode. This feature allows all key functions and values of the power supply, like current limits and other trip off points, to be programmed.  The programming can be done either locally via the front panel, or remotely via the Ethernet or CANbus interface.

UEP 6025 Power Supplies

High density, highly sophisticated modular power supplies designed with WIENER's "Low-Noise-Cavity-VHF-switching technology" which features extremely low ripple and noise (PARD) figures. This technology prevents uncontrolled RF emissions by proper internal shielding and containing of switching parts as well as an efficient deflection of magnetically induced RF currents.  A well-balanced thermal design secures excellent long term stability and high MTBF.

Up to eight independent regulated DC outputs. For higher current capability, power modules can work in parallel. All outputs are floating. Therefore common- or separated grounds can be realized at backplane level (for example analog- and digital- grounds isolated).

Two types of power boxes are available: 1.5U box with 92-265VAC input for 1kW-2kW DC-output. 4U boxes offer space for a second A/C mains input (PFC) to utilize up to 4kW DC performance (230VAC mains input!). Power boxes include:

  • Mains filter in connection with a power factor corrected mains input module (PFC) and soft start circuit,
  • auxiliary power supply to provide monitoring and control logic as well as provide power for the fan tray,
  • Monitoring and alarm circuit supported by a self-calibrating microprocessor system.
  • 6 slots (1.5U box) or 10 slots (6U box) for internal power modules (DC-to-DC converters)
  • Power modules and mains inputs are equipped with long life cooling fans.

Serial connections between power supply, fan tray and bin (plug & play) allows communication and exchange of data.

Rated mains input range 106- 230VAC ± 15% (90...265VAC)  / 3-phase 110V optional for version B
Rated input current Sinusoidal 16A or 32A
Inrush current: limited to rated input current (cold unit)
Input fuse: external, internal on special request
Isolation (Inp.- outp.) CE EN 60950, ISO 380, VDE 0805, UL 1950, C22.2.950
DC output C:  VersionA for 1000 ... <2000W (92 …265VAC)
Version B for 2000 ... <4000W (92 …265VAC)

Regulation static: MEH  550W/650W <15mV (+/-100% load, +/- full mains range)
  MDH (20A): <0,05%  (+/-100% load, +/- full mains range)
  MDL / MDH  <0,1%  (+/-100% load, +/- full mains range)
Regulation dynamic: MEH,  MDH <100mV (+/-25% load)
  MDL / MDH  <0,7% (+/-25% load)
Recovery time  +/-25% load:   within +-1%      within +-0,1%
  Modules 550W    0,2ms    0,5ms, 
  Modules 650W    0,5ms    1,0ms
  MDL / MDH    0,0ms    1,0ms
  (Conditions: Current slope <1000A/ms, 21mF per 100A ^ 1mF per slot)
Sense compensation range: difference between min. and max. output voltage

Available modules

Type Channels Voltage range Peak output / power Noise and ripple
MEH 1 2... 7,0V 115A / 550W 10mVpp,  (0-20MHz ), <2mVrms (0-30MHz
MEH 1 7...16V 46A / 550W <15mVpp,  (0-20MHz ), <2mVrms (0-30MHz)
MEH 1 12...30V 23A / 550W <15mVpp,  (0-20MHz ), <2mVrms (0-30MHz)
MEH 1 30...60V 13,5A / 650W <15mVpp,  (0-20MHz ), <2mVrms (0-30MHz)
MDH 2 2...7,0V (+/-) 30A / 210W (420W) <15mVpp,  (0-20MHz ), <2mVrms (0-30MHz)
MDH 2 7...16V (+/-) 20A / 250W (500W) <15mVpp,  (0-20MHz ), <2mVrms (0-30MHz)
MDL 2 7...24V (+/-) 11,5A / 275W.(550W) <15mVpp,  (0-20MHz ), <2mVrms (0-30MHz)
EMC Compatibility
EMA. EN 61 000-6-3:2001 [RF emission]
  EN 55 022:1998 + Corr:2001 + A1:2000  Class B conducted noise
  EN 55 022:1998+ Corr:2001 + A1:2000  Class B radiated noise
  EN 61 000-3-2:2001 harmonics
  EN 61 000-3-3:1995 +Corr:1997 +A1:2001 flicker
EMB EN 61 000-6-2:2001  [immunity]
  EN 61 000-4-6:1996 + A1:2001 injected HF currents
  EN 61 000-4-3:1996 + A1:1998 + A2:2001 radiated HF fields  incl. "900MHz"
  EN 61 000-4-4:1995 + A1:2001 Burst
  EN 61 000-4-5:1995 + A1:2001 Surge
  EN 61 000-4-11:1994 + A1:2000 voltage variations
  EN 61 000-4-2:1995 + A1:1998 + A2:2001 ESD
Operation temperature: 0… 50°C  ambient without derating,  Storage:-30°C ... +85°C
Temperature coefficient: < 0,2% / 10K
Stability: 10mV or 0,1%  /  24 hours, 25mV or 0,3%  /   6 month
(under constant conditions)
Current limits: adjustable to any lower level
Voltage rise characteristics: monotonic 50ms, processor controlled.    
Overvoltage protection:   crow bar protection trip off adjusted to 125% of nominal voltage each output
DC Off (trip off): within 5ms if >5% deviation from adjusted nominal values,
after overload, overheat, overvoltage, undervoltage (bad status),
and fan fail, if temperatures exceed 125°C at heat sinks
Limits programmable. Outputs discharged by crow bars, when power supply tripped- or switched Off.
Efficiency:   75% ... 85%, depends on used modules
M F O T (Maintenance Free Operation Time):
internal blowers:  40°C ambient     >65 000 h
electronics: 40°C ambient     >100 000 h


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