National Instruments SCXI-1127 - Manual (Page 69)

Appendix A Specifications for SCXI-1128
SCXI-1127/1128 User Manual A-4 ni.com
SCXI-1128
Input Characteristics
Number of relays available
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....................................................250 V
rms
DC....................................................300 VDC
Maximum switching capacity—differential mode or single-ended
DC....................................................30 mA at 10 VDC
AC....................................................0.8 mA at 250 V
rms
,
Maximum switching power per
differential channel or single ended........0.3 W
Contact on resistance (initial) .................<
1.2 kΩ (differential mode)
Transfer Characteristics
Thermal EMF (differential)
0 to 25
°C ........................................<25 µV
Above 25
°C ....................................<100 µV
Maximum frequency bandwidth .............50 Ω termination
Worst-case channel..........................1.5 MHz (–3 dB point)
Channel to channel crosstalk
..................50 Ω termination
100 Hz .............................................< –82 dB
1 KHz...............................................< –74 dB
10 KHz.............................................< –58 dB
100 KHz...........................................< –38 dB
1 MHz..............................................< –20 dB