National Instruments sbRIO-9601 User Manual page 24

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Overvoltage protection (maximum 2 pins in overvoltage)
NI sbRIO-9601/9602
at –20 to 55 °C ......................... ±20 V
NI sbRIO-9602XT
at –20 to 85 °C ......................... ±20 V
at –40 to –20 °C ....................... ±7 V
Posistor (PRG18BB330MS1RB from Murata)
Maximum peak
abnormal-condition current............. 760 mA
Maximum hold current at 25 °C ..... 36 mA
Maximum hold current at 70 °C ..... 20 mA
Maximum hold current at 85 °C
(NI sbRIO-9602XT only) ............... 3 mA
Trip current at 25 °C ....................... 71 mA
Resistance at 25 °C ......................... 33 Ω ±20%
23 NI sbRIO-9601/9602/9602XT User Guide