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VT3240AVoltage-type Break Out Box
In this type of Break Out Box the signal is sent straight through to the
sub-miniature “D” connectors on the VT1432A/33B.
VT3241A ICP
®
-type Break Out Box
Each of the eight connectors in this type of Break Out Box is connected to an
independent, floating current source. These are intended to power
integrated-circuit piezo-electric (ICP
®
) transducers. They supply 4.5 mA
(nominal) at up to 28 volts. The current sources are controllable by software in
groups of four. That is, the current sources for connectors 1-4 can be turned on
or off as a group, as can the current sources for connectors 5-8.
Break Out Box Grounding
Each connector on the VT3240A and VT3241A Break Out Box has a small
manual switch next to it. When this switch is in the “GND” position the outer
shell of the connector is grounded to the chassis ground of the VXI mainframe.
When it is in the “DIFF” position it is not grounded to the mainframe and will
float if not grounded elsewhere in the system (such as at the sensor). The
connector shell should not be allowed to float: if the switch is in the “DIFF”
position the shell should be grounded elsewhere in the system.
VT1433B User's Guide
Break Out Boxes
8-4