The M3-CLOS-ENCL and M3-SPINE-ENCL are identical except for their backplanes, and hence are described in this single specification. These two types of enclosures can be distinguished from their backplanes, from the product labeling on the back, and from selected displays on the color-TFT monitor on the front.

M3-CLOS-ENCL

M3-SPINE-ENCL

These products each include the following Field-Replaceable Units (FRUs), which can be ordered separately for replacements.

• M3-MONITOR - monitoring line card (quantity 1)
• M3-POWER - 350W power module (quantity 4)
• M3-FAN - Fan assembly (quantity 2)
• M3-RACK-KIT - Rack-mount kit (quantity 1)

These enclosures provide power and cooling for 21 vertical line cards in the card cage on the front of the enclosure. The left-most line-card slot is reserved for the M3-MONITOR card. The enclosures also include a color TFT display to display status information. The color TFT display is driven from the monitoring line card, which includes a turn/push knob to control the display mode and certain internal settings. The line cards may be of the following types:

For the M3-CLOS-ENCL, the line-card slots are denoted as follows left to right, and accommodate the following types of line cards:

The M, S, and Q slot types are readily distinguished in the photograph above. A line card of a given type will fit only in the type of slot allowed, but the M3-AIRDAM card will fit in any slot. Both for airflow and for EMI shielding, any otherwise unused line-card slots must include M3-AIRDAM line cards.

The M3-CLOS-ENCL backplane connects the 16 Myrinet ports from each of the 16 "Single" line cards to a set of ports on the 4 central "Quad" line cards to form a Clos network. The backplane also includes the connections for a low-speed network from each line card to/from the monitoring line card.

For the M3-SPINE-ENCL, the line-card slots are denoted as follows left to right, and accommodate the following types of line cards

The M3-SPINE-ENCL backplane is very simple. The backplane Myrinet-serial ports of adjacent pairs of slots, (0, 1), (2, 3), ..., (18, 19), are connected. The only allowed use is with M3-4SW32-16Q line cards in the even-numbered slots and M3-THRU-16Q line cards in the odd-numbered slots. The pairing of M3-4SW32-16Q and M3-THRU-16Q line cards brings out all 128 ports of the 4 32-port switches to the two front panels. These quad 32-port switches are used as the spine switches of a diameter-5 Clos network.

Specifications

Physical Dimensions:

• Rack mounting conforms to the EIA-310 standard (19-inch rack mount). However, different mounting-hole patterns on the rack-mount ears can be supplied on special order. See this drawing for details
• The nominal width of the enclosures is 17.25 inches (438.2mm), and the width to the edges of the rack-mount ears is 19 inches (482.6mm).
• The nominal depth of the enclosures is 18 inches (457 mm).
• The height of the enclosures is 24.368 inches (619mm). This height is 0.132 inches (3.35mm) less than the nominal 24.500 inches (622.3mm) for a 14U rack-mount unit in order to allow for the 0.125 inch (3.2mm) height of the rack-mount shelf bracket (M3-RACK-KIT), plus a small tolerance.

Weight and Mounting:

• Enclosures are shipped completely assembled and tested, including power supplies, fans, and the monitoring line card, but without other line cards, which ship separately. The weight of the unit in this shipping configuration is approximately 55 pounds (25 kg).
• The weight with line cards in all slots can be as high as approximately 101 pounds (46 kg).
• Due to the weight of the unit, it is recommended that the unit be installed in a rack while it is in the shipping configuration (55 pounds, 25 kg), before installing the line cards.
• Use of the M3-RACK-KIT rack-mount shelf backet is highly recommended, both to assist during installation and to support the enclosure in the rack against shock and vibration that may be encountered when shipping racks with switches installed.

Environmental:

• Operating: Temperature 15C to 40C at the air inlets. Relative humidity 15% to 80% @ 40C, non-condensing.
• Storage: Temperature -40C to 70C. Relative humidity 90% @ 65C.
• Shock & vibration: tests pending

Thermal and Cooling:

• Air flow is front-to-back, with separate air paths for the power-supply and card-cage cooling. Each of the four power supplies has a pair of high-speed (10,000 rpm) 1.5-inch (38mm) fans. The card cage cooling is accomplished by two M3-FAN assemblies, each of which has a series pair of 4.5-inch (114mm) fans. Fan rotation speed for the card-cage cooling is monitored, and can be read along with the exhaust air temperature through the M3-MONITOR monitoring card. The small microcontroller card for each M3-FAN unit also controls the fan speed according to the exhaust air temperature. The M3-FAN units operate at maximum speed at exhaust-air temperatures of 40C and higher.
• Internal temperatures are measured both upstream and downstream in the air flow on each line card. The temperatures can be monitored through the M3-MONITOR monitoring card. The line card will shut down autonomously on an over-temperature condition (55C circuit-board temperature).

Power:

• IEC power inlet on the rear. All units are supplied with an IEC line card appropriate to the shipping destination. Note: The 100-127V~ IEC line cord for the M3-CLOS-ENCL or M3-SPINE-ENCL is rated for 15A, whereas all of the other IEC line cords are rated for 10A.
• Power input: 100-127V~ / 200-240 V~, 50 Hz / 60 Hz.
• The 4 power supplies are rated at 350W each (12VDC @ 29A each), and auto-parallel. If one power supply fails, the other three can supply sufficient power. The power supplies can be individually hot-swapped.
• The power factor of the power supplies at full (350W each) load is typically 0.98, but at typical load is ~0.90.
• Typical total power with line cards in all slots is approximately 700W.

Safety Approvals:

The M3-CLOS-ENCL and M3-SPINE-ENCL are certified by TUV of North America, Inc., in accordance with the IEC System for Conformity Testing and Certification of Electrical Equipment (IECEE), CB Scheme (view the CB Certificate). In addition, TUV certified these products to the US and Canadian safety standards (view the cTUVus Certificate). The complete TUV test report is available here.

EMC Approvals:

All configurations described above are within Class A limits for emission of and susceptibility to electromagnetic interference (EMI). The full EMC test report is available here.

Last updated: 7 January 2007