51401996-100
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EAMR Board
Enhanced Redundancy board (51401996-100) for the Application Module.
The Application Module Redundancy Subsystem includes two Application Module nodes that are cable-connected through AMR or EAMR boards and a K4LCN processor. Limited testing can be done on a single AM with an AMR or EAMR board.
AM Redundancy includes hardware and software that allow a secondary AM to back up the operation of the primary AM. To do this, all of the application data in the primary AM is transferred to the secondary AM, where an exact copy of the data is maintained to be used if the primary AM should become inoperative.
EAMR extended redundancy board (51401996-100) that connects to the K4LCN-16 board through a ribbon cable that is visible at the front of the chassis. The EAMR I/O boards EAMR I/O CE CE Compliant and EAMR I/O Non-Ce Compliant in each AM are interconnected by two ribbon cables that are visible at the rear of the chassis.
AM Redundancy requires the following memory in redundant AMs: 157,000 words (fast/slow processor buffers), plus an additional 22,000 words for the AM redundancy Internetwork Point Processor (IPP) option if used. The total amount of memory in an AM can range from 3 Mw to 16 Mw (Mw = one million words). The amount of user memory available in an AM is a function of the total AM memory size. The total AM memory used increases with each point loaded into the AM and with each CL block linked to a point. If one of these operations results in the total memory used exceeding the total user memory available, the operation is aborted and an error message is generated.
An EAMR chassis MUST have the K4 processor board installed in slot 1 unless the node contains a CSR I/O paddle card in slot 1 (which is the LCN coax shield ground for that LCN cable). Once the LCN coax shield grounds have been installed correctly relocate the K4 and its associated LCN I/O paddle card into slot 1. If the K4 is NOT in slot 1, the system will NOT perform 'Backplane Integrity' checks and you could have a hardware problem with the node and not know it.
Power must be removed from the module whenever you are removing or installing any board, including an I/O paddle board. Be sure that an I/O paddle board is installed in the correct slot; some boards have only one slot that they can be installed in without causing damage. I/O paddle boards plugged into the wrong slot can cause traces on the backplane to burn open.