Housing And Backplane - Novatech Bitronics M87X Series Manual

2.0 HOUSING AND BACKPLANE

The M87x chassis is a modular-by-board design, with a rugged aluminum housing
specifically designed to meet the harsh conditions found in utility and industrial
applications. The chassis features a passive backplane, an embedded and fully
TM
compatible CompactPCI (cPCI) bus section and proprietary signal input and analog
(DSP) processor sections. All active circuitry is located on removable modules. There are
four types of modules: Power Supply, Signal Input, the Host/Analog-Digital Signal
Processor, and cPCI expansion modules. See Figure 1 (below) for the locations of the
module bays in the standard chassis.
Figure 1 - Front View and Module Assignment (C07A5, M871 Only)
The power supply bay utilizes a standard cPCI power connector. The signal input bay
uses a self-aligning 24-pin header. The Analog-Digital Signal Processor board interfaces
to the PCI Bus with a standard cPCI connector, and uses a 24-pin header to connect to the
analog signals from the Signal Input Board. The Host Processor and the cPCI expansion
bays have standard cPCI connectors. The expansion bays are fully compatible, both
electrically and mechanically with cPCI standards. The Backplane board is an eight-layer
circuit board, and contains a 5V, 33MHz cPCI bus. The standard bay assignment for the
standard chassis (C07A5) used for the M871 is shown above. The M871 and M872 are
also available in an intermediate chassis (C10A7) that adds two additional cPCI expansion
bays, and an extended chassis, (C12A8) that adds three additional cPCI expansion bays.
The H12 host processor with either of the combined Ethernet options (E1 or E3) uses a
wider front plate incorporating the first of the expansion slots to the left of the
host/analog/Ethernet module.
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ML0021 August 15, 2018 Copyright 2018 Bitronics, LLC