Switching Module Chassis Installation - Racal Instruments 1260 Series User Manual

1260 Series User Manual
Switching Module
Chassis
Installation
LBUS Lockout Key Installation
In order to accomodate the VXIbus specification defined minimum
thickness of the LBUS Lockout keys and the clearance provided
around the module ejector handle, two LBUS Lockout keys must
be fitted on top of each other to each module.
To install the A and C keys on a module, align the screw holes in
the Lockout keys with the appropriate holes in the module front
panel. Fit the two screws required, and secure the Lockout keys to
the module front panel.
To install A/C Lockout keys to the module, the module ejector
handle must be in the unejected position. The first key may be
pushed around the ejector handle and aligned with the front panel
screw holes. This takes up most of the clearance under the ejector
handle, preventing the second Lockout key from being installed. To
provide the necessary clearance, move the first Lockout key away
from the module body, and slide the second key underneath the
first key and around the ejector handle.
To secure the A/C Lockout keys to the module, align the Lockout
keys screw holes with the holes in the module front panel. Install
two screws in the holes at the top of the module front panel and
tighten the screws. Move the ejector handle to the ejected position,
and install a third screw in the hole now made accessible.
Before installation of the switching module, visually inspect it to
ensure there are no bent, damaged or missing pins. Pay particular
attention to connectors P1 and P2 on the rear of the module.
Repair any damage to the module before proceeding.
Before installing the switching system Master, the VXIbus
specification defined IACKIN/IACKOUT, daisychain connection for
the chassis slot the Master will be resident in, must be open
circuited. This is accomplished in the Racal-Dana Model 1261 or
1262 chassis by opening the switch fitted on the daisychain. (Note:
In later revisions of the 1261 and 1262 chassis, open circuiting is
accomplished automatically when a module is installed into the
chassis. See the appropriate chassis manual for more
information.) The switch used is the higher of the two switches on
the lower switchbank to the left of the slot the Master is to be fitted
to. Note that other vendors may choose to implement the
daisychain with either switches or jumpers.
If more than one switching module is to be installed in the VXIbus
chassis, the module with the 1260-01 card installed must be fitted
at the leftmost position of all modules being installed in the
chassis. The rightmost module must have the twelve jumpers
Installation Instructions 2-9