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1.0 GENERAL DESCRIPTION
The VX402C-64 Active Carrier allows an A- or B-size VME, VXI, or VME64 module to be used
in a C-size VXI mainframe chassis. Throughout the rest of this manual, the VME/VXI card being
carried will be referred to as the VME module.
The carrier provides an actively-buffered electrical interface for the standard VME bus signals.
The VX402C-64 does not support the full VME64 extension bus; however, -0001, -0003, and
-0004 versions provide +3.3V power to the P1 row D VME64 extension. The adapter also
features a VXI C-size mechanical enclosure to support and shield the VME module. The carrier
and its enclosure have been designed so that the front panel of the VME module sits flush with
the front panels of other C-size modules as shown in Figure 1.
The VX402C-64 supports interrupts and provides a capability for bringing P2 VME signals to the
front panel. The carrier also supports VXI VXITTL triggers and a prototype area is provided for
buffering the VXI SUMBUS signal. These features allow the VME module to transparently
interface to a C-size chassis.
J1
J2
P1
P2
P1
P2
VX402C-64
USER’S VME
MODULE
VME
VME
USER’S VME MODULE
Figure 1. Front Panel and Top View (Top Shield Not Shown)
1.1 PURPOSE OF EQUIPMENT
This VX402C-64 was designed to provide an interface for using B-size VME modules in a VXI
C-size chassis. The active nature of the module allows extensions of the VXI bus without
violation of VME/VXI electrical bus standards.
C&H Technologies, Inc. <> 445 Round Rock West Drive <> Round Rock, TX 78681 <> www.chtech.com