NI USB-9481 User Guide and Specifications
12
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Specifications
The following specifications are typical for the range 0 to 60 °C unless
otherwise noted.
Output Characteristics
Number of channels................................4
Relay type ...............................................Single-pole single-throw (SPST),
Form A
Switching capacity (resistive load)
Switching voltage ............................60 VDC max, 250 V
rms
max
Switching current (per channel)
One channel ON .......................4 A max at 30 VDC,
1 A max at 60 VDC,
4 A max at 250 V
rms
All channels ON .......................2 A max at 30 VDC,
1 A max at 60 VDC,
2 A max at 250 V
rms
On resistance...........................................50 m
Ω
typ
Switching rate .........................................1 operation per second
Relay open time ......................................5 ms max
Relay close time......................................10 ms max
Relay bounce time ..................................3 ms typ
Off state leakage .....................................10
μ
A max
Expected life cycles
Mechanical (no load).......................20,000,000 typ
Electrical (connecting to load).........100,000 typ
Power Requirements
Current consumption from USB.............500 mA, max
Suspend mode..................................2.5 mA, max
Bus Interface
USB specification ...................................USB 2.0 Hi-Speed
