© National Instruments Corporation A-1 SCXI-1127/1128 User Manual
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Specifications

This appendix lists the specifications for the SCXI-1127/1128 modules.
These specifications are typical at 25 °C unless otherwise noted.

SCXI-1127

Input Characteristics
Number of relays available
as channels .............................................32
Common-mode voltage
Channel to channel..........................300 Vrms or DC
Channel to earth.............................. 300 Vrms or DC
Maximum allowed voltage—differential mode or single-ended
AC...................................................300 Vrms
DC...................................................300 VDC
Maximum switching capacity—differential mode or single-ended
DC...................................................1 A at 30 VDC
AC...................................................200 mA at 250 Vrms,
0.5 A at 125 Vrms
Maximum switching power per
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