1260-43 User Manual
Installation Instructions 2-2
Racal Instruments
©
2006
Module
Configuration
The 1260-43 is an ultra high-density matrix switch card. Each
module consists of three 8x24, single wire matrices, which are
interconnected via a 10 lane bus. On-board configuration relays
allow software control of the matrix configuration.
The 1260-43 is comprised of three boards, the 405237, 405249
and the 405250. The 405249 is the main controller board, used in
interfacing to the VXI bus and thus has all the control logic for
communicating with the bus. In addition the control board decodes
the address’s that select the relay enable read/write ports. The
405237 is the relay board and contains 900 relays of which 450
relays are on top with another 450 relays on the bottom. The
405249 (control board) connects to the 405237 (relay board) via
four 250 pin flex cables. The flex cables pass the relay coil
enabling signals from the control board to the relay board. The
405250 is the interface board and contains 8 connectors used to
connect to the outside world. The interface board connects to the
relay board using two 80 pin flex cables.
The 405250 board shifts the ‘Output Bus’ one position to the left
before connecting to J207. This is transparent to the user and is
done in order for the 1260-43 to be compliant with the IFTE
specification when daisy-chaining two or more 1260-43’s together.
This shift eliminates the need to place the shift in the daisy-
chaining cable. Thus the daisy-chaining cable becomes point-to-
point.
Summary of Contents for 1260-43
Page 5: ......
Page 6: ...This page was left intentionally blank ...
Page 10: ...1260 43 User Manual iv This page was left intentionally blank ...
Page 12: ...1260 43 User Manual Specifications 1 2 Racal Instruments 2006 Figure 1 1 The 1260 43 ...
Page 78: ...1260 43 User Manual Logical Relay Layout A 2 Racal Instruments 2006 ...
Page 79: ...1260 43 User Manual Racal Instruments 2006 Logical Relay Layout A 3 ...
Page 82: ...1260 43 User Manual 1260 43 Relay Layout B 2 Racal Instruments 2006 ...