ABE040 204-040-100-012 System Rack 19" Rack With Height Of 6U

ABE040 204-040-100-012 system rack 19" rack with a height of 6U

Product Details:

Description:

A VM MPS can be housed in a 19 inch rack (84TE) with a height of 6U (6HE), known as the VM600 system rack. Two types of this rack exist: the ABE040 and the ABE042. These are identical, except for the position of the rack mounting brackets.

An ABE040 contains a front card cage and a rear card cage. The card cages are separated by the rack backplane.

The appearance of the front panel and rear panel of the rack depends entirely on the types of cards installed in the two card cages.

Most cards installed in the rear of a standard 19" rack (ABE04x) use an electronic keying mechanism to help ensure that the card is installed in the correct slot (for example, in the slot directly behind the associated processing card in the front of the rack). This includes IOC4T, IOC8T and IRC4 cards.

In ABE04x racks, each slot of the backplane has a unique, hard-wired 4-digit binary code

Cards that implement this electronic keying mechanism have a bank of micro-switches that can be used to assign a slot number to the card . This code is stored in the slot number (address) assignation register on the card (IOC4T, IOC8T or IRC4).

Each card compares its slot number with the hard-wired slot number coded on the rack’s backplane. The result of the comparison is typically displayed on the SLOT ERROR LED on the cards panel:

• If the codes are identical, the LED is green.

• If the codes are not identical, the LED is red.