Section 11: Model 3732 quad 4x28 reed relay matrix card
Series 3700A Switch and Control Cards Reference Manual
11-48
3700AS-909-01 Rev. B / December 2011
Cross-card expansion
You can use the Model 3706A analog backplane to expand the number of columns in a system
beyond the capacity of a single Model 3732 card. The signal paths on the backplane can be used to
interconnect the rows on up to six Model 3732 cards by closing the appropriate backplane relays on
all of the cards.
Because the Model 3706A backplane has six dual paths (12 signal paths), cross-card column
expansion is limited to 12 rows. If you need to expand the columns by more than 12 rows, use
external wiring to make the necessary row interconnections for the remaining rows.
NOTE
When the Model 3706A backplane is used for column expansion, it is unavailable for use by other
cards to connect to the DMM exclusively. It can be used to route the expanded card signals to the
DMM as long as the proper rows are used.
The next table shows the possible column expansion configurations using two Model 3732 cards.
Column expansion configurations with two Model 3732 cards:
Column expansion
configuration
Mode
4x224 1-pole
8x112 1-pole
12x56 1-pole
4x112 2-pole
