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© National Instruments Corp.
19
NI 9219 Operating Instructions
circuit is open, make sure no more than ±60 V is sourced across the 
switch. Open Contact mode is supported only in CompactRIO 
systems. Refer to Figure 12 for an illustration of the connections.
Figure 12.  Connections in Open Contact Mode
Sleep Mode
This module supports a low-power sleep mode. Support for sleep 
mode at the system level depends on the chassis that the module is 
plugged into. Refer to the chassis documentation for information 
about support for sleep mode. You can enable sleep mode in 
software. Refer to the driver software documentation for more 
information.
Typically, when a system is in sleep mode, you cannot 
communicate with the modules. In sleep mode, the system 
consumes minimal power and may dissipate less heat than it does 
in normal mode. Refer to the 
 section for more 
information about power consumption and thermal dissipation.
HI
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NI 9219