National Instruments PXIe-4339, User Manual And Specifications, Page: 30 / 36

30 | ni.com | NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
Bridge Completion
Quarter-bridge completion
Values........................................................120 Ω , 350 Ω , 1 k Ω
Tolerance
120 Ω ................................................0.25% max @ 23 °C ±5 °C
350 Ω and 1 k Ω .................................0.15% max @ 23 °C ±5 °C
Stability
120 Ω ................................................15 ppm/°C max
350 Ω and 1 k Ω .................................12 ppm/°C max
Quarter-bridge shunt calibration resistors (SCB)
Values........................................................50 k Ω , 100 k Ω
Tolerance...................................................0.1% max @ 23 °C ±5 °C
Stability .....................................................10 ppm/°C max
Shunt calibration resistors (SCA)
Values........................................................100 k Ω or user provided through SCAL-4339
Tolerance...................................................0.1% max @ 23 °C ±5 °C
Stability .....................................................10 ppm/°C max
SCA switch resistance ..............................2
Ω
External Power (EXT PWR)
Voltage range ....................................................6 V to 28 V single ended
Current rating....................................................2.4 A max
100 mA per EX+
Path resistance...................................................0.7 Ω
(EXT PWR to EX+ channel)
Protection ..........................................................Short circuit protected per
position (A, B, C)
Protection type ..........................................Positive temperature coefficient (PTC) resistor
Mechanical
RJ50 receptacle
Mean number of insertions
before failure.............................................500
Channel configuration switches
Switch type ...............................................Electromechanical relay, latching
Expected switch life
Mechanical........................................5 × 10
7
cycles
Electrical ...........................................2 × 10
5
cycles