
Model T940 User Manual
Publication No. 980938 Rev. K
DRM Front Panel 3-4
Astronics Test Systems
J200/J201 flat ribbon mating cable.
2. DRM cable assemblies are open at one end.
Front Panel LBUS Lockout Keys
The VXIbus-defined LBUS Lockout Keys are designed to prevent adjacent
VXI Modules with incompatible logic families from connecting to the Local
Bus. They are attached to the exterior of the module at the top of the front
panel.
Figure 3-4 illustrates the two types of LBUS Lockout Keys used for this
product. Figure 3-5 shows the application of Lockout Keys for the T964.
A/C-type C-type
Figure 3-4: LBUS Lockout Keys
The LBUS Lockout Key is fitted to all modules. The T964 requires the use of
the A/C-type LBUS Lockout Key (PN 455540) on all modules. The T940 may
use the C-type key (PN 455541) for the leftmost module as long as the
jumper block for the module is
NOT
in the Primary position (and it shouldn’t
be if it’s the leftmost T940 DRM).