Specifications

Hardware Description of LCN Node Processors – K4LCN-X Node Processor
22 Application ModuleX Service 12/01
Honeywell
3.2 K4LCN-X Node Processor
Overview
The K4LCN processor board contains all of the essential parts to make
up the kernel portion of any LCN node. It includes a 68040 processor,
LCN interface circuits, and 8 or 16 megawords of on-board memory (for
the A
X
M). It has floating point calculation hardware capability. The exact
memory size is determined by which memory option is purchased. A
minimum of 6 megawords is required to support the A
X
M with R500
software.
Changing memory size requires the replacement of the existing memory
daughter board or mezzanine board with a board that contains the proper
memory complement. The memory board can be upgraded in the field.
The K4LCN board memory size is easily recognized by the -X portion of
the name on the left extraction lever. (K4LCN-8 = 8 megawords,
K4LCN-16 = 16 megawords).
The following board assembly layout illstrations show a top view of the
early production K4LCN board, assembly 51401946-100, and the latest
production K4LCN board, assembly 51402755-100.
52521
ASSY.
Memory Board
LCN Address Pinning
51401946-100