Filter
Top Products
Getting Started
1–4
VX4380 256-Crosspoint Relay Matrix Module User Manual
VXI interface &
slave controller
daughter board
VXI backplane
local bus
Backplane
connectors
Daughter board
connectors
Front panel
connectors
Figure 1–2: Typical SurePath Configuration
The VX4380 Module has one 10 A fast-acting fuse on the +5 V line.
Each relay module that the Option 01 Module controls has a fuse that limits the
amount of current that the module can draw from the VXI backplane +5 V power
pins. This fuse protects the module in case of an accidental shorting of the power
bus or any other situation where excessive current might be drawn.
The Option 01 Module monitors the state of the fuses of each of the relay
modules that it controls. If a fuse opens on one of these modules, the Option 01
Module will assert SYSFAIL* on the VXIbus.
If the +5 V fuse on the module on which the Option 01 Module is installed
opens, the VXIbus Resource Manager will be unable to assert SYSFAIL
INHIBIT on the Option 01 to disable SYSFAIL*.
If a +5 V fuse opens, remove the fault before replacing the fuse. Replacement
fuse information is given in the Specifications section of the user manual for the
appropriate relay module.
Fuses