National Instruments NI 9481 - Manual (Page 11)

© National Instruments Corp. 11 NI 9481 Operating Instructions and Specifications
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 Specifications section for more
information about power consumption and thermal dissipation.
Specifications
The following specifications are typical for the range –40 to 70 °C
unless otherwise noted.
Output Characteristics
Number of channels.......................... 4 electromechanical relay
channels
Relay type ......................................... Single pole single throw
(SPST)
Power-on output state ....................... Channels off