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DC62 19" 6U Rackmount Cluster / 6 Nodes (Subrack & 6 x Trays) 500mm DEEP
Chassis DC62
Hot news!                                                   November 23, 2012, we announced our newest product, the DC62 - Compact Rackmount Cluster Chassis for Micro-ATX form-factor Server.                                                                                                       Cheaper then equivalent 6 units of 1U!                                  Has better CPU and system cooling!                                  Is better scalable. Supports up to 4 Low Profile or 1 full-height I/O card(s)!                                  Utilizes non-proprietary low cost components for server assembly!                
The DC62 is an excellent alternative equivalent to traditional 1U rackmount servers. The DC62 uses regular Micro-ATX architecture and memory modules while still building a high density server cluster. The DC62 Chassis is 6U high and includes 6 independent nodes each equivalent of 1U architecture, but with perfect cooling in contrast to a 1U chassis. Even with all this innovation, the DC62 is cheaper than six equivalent 1U chassis. The final product (server) can even be a lower price than an equivalent 1U server chassis as they regularly use non-proprietary components , unlike the DC62. Each node has its own power supply, processor, memory and hard drive units. Since the DC62 subrack does not use a power supply back plane and each tray provides independent power connector for each node, you can remove any node without shutting down other nodes. Subrack and Trays are specially designed to offer more flexibility for your application needs.

The DC62 cluster nodes are completely independent of each other this means you can use different configurations of nodes installed in the same subrack so you can mix and match different type of nodes in the same cluster. The DC62 uses standard Flex ATX/1U PSU and can be supplied with or without PSUs.

Typical uses for the DC62 include high-powered multi-processor clustering, rendering server farms, security analysis, telecoms and other web applications.
Form Factor
6U subrack with 6 x trays support for standard Micro-ATX (244x244mm) motherboard
Dimensions
Height: 226mm
Width: 482mm
Depth: 497mm
Net weight: less than 33kg
Expansion slots (in each tray)
- 4x Low Profile PCI expansion slots (lower than 52.5mm)
- 1x Full-height PCI expansion slot with using riser card
Drive Bays (in each tray)
- 1x HDD 3.5" bay. Extended up to 2 by additional fixed HDD cage 2HD26
Front Panel (in each tray)
LEDs:
- Hard drive activity
- Power
- Alarm
Buttons:
- Reset
- Power

Detailed description
Operating Environment (System)
Operating Temperature Range: +5~50ºC
System Cooling
- 8x 80x80x25 2800RPM subrack's fans,
 7.44m3/min total air flow controlled by intelligent cooling system FanMagic8® and powered by AC/DC adaptor GPSU40B-3
Power Supply (in each tray)
PSU 250W 350W
Input Voltage 110~220VAC 110/220VAC
+3.3V 14A 12A
+5V 17A 16A
+5V standby 2A 2A
+12V1
+12V2
8A
14A
29A
-
-12V 0.8A 0.3A
Package
Height: 310mm
Width: 520mm
Depth: 560mm
Gross weight: less than 40kg (5kg-pallet)
Available Colors
 RAL9005 Black

Ordering Information Part number Description
Power Supply DC62
DC62250
DC62350
w/o PSU
250W
350W
Ethernet port option DC62250-E
DC62350
250W, Fanmagic8-E (Ethernet) controller
350W, FanMagic8 (w/o Ethernet) controller
Remote Reboot Solution option DC62250-R
DC62350
250W, Remote Reboot Solution
350W, NO Remote Reboot.
AC Power Distribution Unit option DC62250-RP
DC62350
250W, Remote Reboot Solution, AC Power Distribution Unit
350W, NO AC Power Distribution Unit.
Optional Parts List Model Description
PCI riser card Sorry, it's coming soon 1.5U riser changes the insert direction of the slot by -90 degrees. more>>
PCIe riser card 1U5L-e1 1.5U PCI Express x1 riser card changes the insert direction of the slot by -90 degrees. more>>
1U5L-e4 1.5U PCI Express x4 riser card changes the insert direction of the slot by -90 degrees. more>>
2xHDD cage 2HD26 2xHDD3.5" low cost brackets (holders). more>>
3xHDD cage 3HDM24 3xHDD2.5" drive cage more>>

Technical drawing
of the DC62 tray
Technical drawing of the DC62
subrack with trays
Technical drawing of the DC62 tray Technical drawing of the DC62 subrack with trays
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PHOTOGALLERY
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Subrack front view, two trays are slid out Subrack back view Tray with ASUS P8B, 1xHDD3.5'', Ethernet Card and SFX PSU Tray with ASUS P8B, 1xHDD3.5'', Ethernet Card and SFX PSU Empty Tray with SFX PSU Tray with 3HDM24 2.5'' HDD Cage
Smart Air Cooling of the Subrack (FanMagic8)
The subrack has 8 cooling fans of 80x25mm all drived by FanMagic8® that is a hardware-firmware device. The FanMagic8 realizes a temperature-based switch mode automatic-fan-speed control with 2 independent channels and 2 fan speed vs temperature profiles which correspondent to the channels. The FanMagic8 requires no special software and implements thermal management according to its own firmware.
The DC62 Fan Panel View
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The DC62 Internal View
All cooling fans are hot swappable and due to the quantity of fans and air performance are redundant for DC62's applications the FanMagic8 prowiding diagnostic increases reliability of cooling system essentially, while fan speed-down at low temperature increases fan life, decreases energy consumption and decreases acoustic noise. Two thermistors (red circle marked) and FanMagic8 controller realize separated regulation of cooling fans for two independent airflows.

The FanMagic8 measures the temperatures for both Channels A and B and control the speed of attached fans based on those temperatures. Temperature data are converted from remote thermal sensing elements - thermistors and translated into a fractional (step 5%) fan speed from 0% to 100% according to pre-charted profile. Each Channel drives up to 4A load for 4 standard 12VDC 80mm fans with 3-rd wire (tacho-generator) and provides regulation by Pulse Width Modulation (PWM) from 0% to 100%. 0% PWM in the profile allows to shut the fans off for the temperature or up to a certain temperature, and then turn them on starting at a certain speed, and then ramp fan speed in response to temperature, and change the slope of the ramp once the temperature passes another threshold according to the profile. The profile is a user defined graph of fan speed (0-100%) vs temperature.

There are two options for the DC62 fan controller - FanMagic8 and FanMagic8-E!

FanMagic8 realises remote monitoring and control through the following interfaces:

  • Serial, 3V logic level, it is base interface for all FanMagic8 family
  • Serial, -12V..+12V RS232, just for "R" option (FanMagic8-R) supplied with the DC62 on request
  • Ethernet BASE-10T, just for "E" option (FanMagic8-E) supplied with the DC62 on request

FanMagic8-E is supplied as option. Please, order FanMagic8-E together with the DC62 chassis!

The principle of controller operation is frequent measuring (3 times per second) and analysing of airflow temperature and rotation speed of attached fans as well as generating of the voltage applied to the fan according to preliminary charted matrix. The temperature interval step is 2ºC. The PWM step is 5%. The value of PWM that is associated with temperature interval could be changed and regulation curve could be mould individually. PWM value determines fan power and finally the rotation speed (RPM).

Measured values of the RPM are compared with tabulated points (individually for each fan). Normally functioning fan should not have the rotation speeds lower than threshold matrix values. In presented example the measured value of temperature (32ºC) and PWM value 60% determine the threshold rotation values for 1st, 2nd, 3rd and 4th fan as 1400, 2200, 4000 and 4100 correspondingly. Even if one of fans has rotation speed lower than pre-charted threshold value, the FanMagic8 detects it as a fault, chimes, lights the LED (optional) and redefines PWM as 100%. Thus, early diagnostics of fan failure is assured at the time when rotation (and cooling) ability still is not lost but fault has been detected and signalized. If quantity of fans and air performance are redundant, the early diagnostics allows to increase reliability of cooling system essentially, while fan speed-down at low temperature increases fan life and decreases acoustic noise of the most unreliable and noisy element of modern electronics – cooling fan.

The FanMagic8 provides a PWM output for regulating fan speed. This low-frequency signal (~4 Hz to 100 Hz) adjusts the fan rotations per minute by cycling the fan motor on and off via an adjustable duty cycle. Duty on to duty cycle is PWM value ~0% to 100%. Chopped by PWM the power is applied to the fan through the Channel Driver (A and B).

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Both tables of matrixes for both Channels are placed in nonvolatile memory and there are some ways for their corrections if needed. The picture on the left shows the screenshot for FanMagic8-E and Channel A profile as a user defined graph of fan speed (0-100%) PWM vs temperature table. Just remember that there is no recommended PWM of 5% and 10% since many fans don’t like to be run with that little power.

The FanMagic8 (matrix) can be tuned up to determine individual handling characteristic both for PWM temperature characteristic and for attached fan behaviour in real use environment. Reducing of the fan speed as the temperature drops minimizes the system acoustic noise, prolongs fans service life period, diminishes power consumption. The FanMagic8 assures early diagnostics of fan failures and increases reliability of hardware functioning due to the overall monitoring of cooling system and signalling in case of failures. The use of the FanMagic8 combined with the DC62 cooling system which has redundant cooling facilities allows to design fault-tolerant system with long-life performance.

Remote Reboot Solution

The DC62 that is equipped with the FanMagic8-E and OpticReset6 board could be used as Remote Reboot solution for any DC62's server with just a few clicks. It means than the solution does not require the physical presence of people to reboot a remote frozen computer. The OpticReset6 board is logic level controlled switch which pushes the reset button by closing the contacts on your controlled device (Motherboard).

Here below is shown the OpticReset6 board which contains 6 infrared LEDs and is used as option for the DC62 cluster chassis.

The OpticReset6 board is connected to the FanMagic8-E by 10-wires ribbon cable. Hereby, we have 6 free space optic channels with narrow-beam infraread emitters. Of course, to get it done the DC62's tray has to be equipped with phototransistor. Also, you have to connect phototransistor to the motherboard as reset button keep correct polarity.

Such phototransistors are placed exactly opposit each of 6 LEDs (as shown on the right picture). The phototransistor acts as controlled switch. Of course, you have to connect phototransistor to the motherboard as reset button keep correct polarity.

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The FanMagic8-E realises webserver with AJAX to generate dynamic screens with data exchange and control. You can easily control or monitor the DC62 cooling system and provide remote reboot from your computer, tablet or smartphone from anywhere in the world. Using a common web browser, data can be made available to any user with a network connection. Just look at the screenshot on the right picture:

Of course, you can supervise your server by dedicated software and automatically reboot upon failure.

Remote Reboot Solution is supplied as option. Please, order Remote Reboot Solution together with the DC62 chassis!
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AC Power Distribution Unit

There is AC Power Distribution option for the DC62 that makes power cord maintenance very easy. The DC62 could be equipped with AC Power Distribution Unit (bracket) at the rear panel for tray's online power functions. This bracket contains six AC connector plugs C13 which are fixed in proper position opposit AC inlets C14 of the DC62 tray PSUs. In this case you need no power cords usage at all. Just plug the DC62 tray in the subrack and take your server powered. Enjoy!

AC Power Distribution bracket is supplied as option. Please, order AC Power Distribution bracket together with chassis!
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Low profile I/O card installation
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More and more card manufacturers are reducing the size of add-on cards to be compatible with the low-profile PCI (PCIe) standard. Unfortunately the DC62 tray does not fit a standard low-profile card in full measure. The add-on card should be 52.5mm height and lower while a standard low-profile card can be up to 72mm height. In oder to install add-on card the first step is to replace the metal bit (bracket) at the end of the card. The one supplied with the card will not fit into a DC62 tray. Of course, you can cut excess part away and drill mount hole in standard bracket; at the same time we provide a smaller version brackets for the most popular cards. In this case it is easily replaced only with the help of screwdriver. The DC62 tray front panel provides 3 low-profile card slots. The add-on card can be plugged into position-7, position-6, position-5 and position-4 on the Micro-ATX system board (counting from the slot farthest from the CPU starting from 4). Also, you should cutout some metal connection straps on the back side of chassis by nipper. You should cutout only those connection straps that would interfere with panel connectors. To make it easier, the connector zone of tray front side has been made netlike.

Full-height I/O card installation with Riser Card PCI (1R5L) or PCIe (1U5L-e1, 1U5L-e4)
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Only one full-height card can be installed in DC62 tray using riser card. Riser cards 1R5L (PCI), 1U5L-e1 (PCIe x1) and 1U5L-e4 (PCIe x4) are used to change the insert direction of I/O card to the slot of motherboard by 270 degrees. The I/O card is plugged into the riser card and resides parallel with the motherboard. The PCI riser card can be plugged only into the fixed positions on the motherboard. It is important to consider this when selecting a motherboard. Picture at the left shows the slots location on a 4-slots standard Micro-ATX form factor board (starting from the left counting from the 4): PCI (PCIe) slot-4, slot-5, slot-6 and PCIe slot-7. The riser card 1R5L, 1U5L-e1 or 1U5L-e4 has a slot at the necessary height and should be attached to position-6, position-5 or position-4 on the system board (counting from the slot farthest from the CPU starting from 4-th). You can't attache the full-height card to the position-7 because of CPU presence.

Keep in mind that your motherboard should have PCI (PCIe) slot at required position in order to provide riser card plugging in required position.

I/O card should be fastened in chassis with an additional holder (look at the photo below). First fasten holder with a screw and a nut M3. The holder you have to install outside back panel in one of three holes (the holder on the photo is installed in the middle hole). Install riser card in the slot and then install and fasten I/O card.

Also, keep in mind a safe space between components on both surfaces of I/O card and the rest components of your system (especially between CPU cooler or memory modules). Use a non-conductive self-adhesive bumpone to prevent the I/O card from short-circuiting with components of your system or elements of the chassis.

Riser card is supplied as option, but it is advisable to order required riser card together with chassis.


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