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VEV-15

VERSATILE 21-SLOT
VME SYSTEM CHASSIS

VERSATILE CARD CAGE CONFIGURATION

A 21-slot 6U x 160mm card cage with a VME J1 backplane is standard in the Model 28, the Model 38 provides a 21-slot card cage with a 12-slot backplane and a mounting adapter for two 5¼" drives. Options include a 21-slot J1/J2 monolithic backplane (shown on page vev151). Smaller backplanes and multiple section backplanes are also offered. Any combination of backplanes that will physically fit can be provided.

The card cage is recessed two inches behind the front surface of the chassis. The recess protects connectors that are plugged into the faceplates of the VME modules from inadvertant contact. The recess is also part of the internal cable management system that allows easy routing of cables between the faceplates and the interior of the chassis.

VEV-15 Card cage/drive bay configurations

FLEXIBLE MASS STORAGE

The VEV-15/Model 38 provides mounting and DC power for up to two full-height or four half-height 5¼" or 3½" mass storage devices. These drives are mounted in an adaptor that occupies the right eight slots of the 21-slot card cage, leaving 13 slots available for backplanes. DC power cables are provided for up to four standard drives on request. Additional or special cables are optional. When the system does not require all of the available spaces for drives, an optional half-height dummy panel (DP-5H-A) must be used to cover each unused opening.

For those systems that do not require 5¼" drives, the VMEDA disk adapter can mount one or two 3½" drives in only two or three slots of the card cage. See the VMEDA data sheet for details. The upper front panel can also be customized with special openings and mounting brackets, if required.

COOLING

Side view of chassis, showing air paths Cooling air is drawn into the chassis through vents in the front panel and side panels below the card cage. Incoming air passes through a filter located below the card cage. Filtered, clean air then passes through the card cage. The air stream is drawn out of the top of the card cage and into the upper chassis. Air then travels past the power supply to the upper rear panel of the chassis. Three 100cfm fans then exhaust the warmed air out of the chassis. Air warmed by the power supply never touches the more sensitive VME modules or mass storage devices.

For systems using less than 500 watts of power, you may request lower velocity fans to minimize acoustic noise. Fans as low as 57cfm, which reduce fan noise to virtually inaudible, are available at no extra charge. This option is not recommended when a power supply above 500 watts is used.

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