National Instruments 1128 用户手册
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Specifications
This appendix lists the specifications for the SCXI-1127/1128 modules.
These specifications are typical at 25
These specifications are typical at 25
°C unless otherwise noted.
SCXI-1127
Input Characteristics
Number of relays available
as channels ............................................. 32
as channels ............................................. 32
Common-mode voltage
Channel to channel.......................... 300 V
rms
or DC
Channel to earth .............................. 300 V
rms
or DC
Maximum allowed voltage—differential mode or single-ended
AC ................................................... 300 V
rms
DC ................................................... 300 VDC
Maximum switching capacity—differential mode or single-ended
DC ................................................... 1 A at 30 VDC
AC ................................................... 200 mA at 250 V
rms
,
0.5 A at 125 V
rms
Maximum switching power per
differential channel or single ended ....... 60 VA, 30 W
differential channel or single ended ....... 60 VA, 30 W
Contact on resistance (initial)
................ 100 mΩ
Contact material ..................................... Gold-clad silver alloy
Transfer Characteristics
Thermal EMF (differential) ................... <3
µV
Maximum frequency bandwidth
............ 50 Ω termination
Worst-case channel ......................... 10 MHz