©
National Instruments Corporation
A-1
A
Specifications
This appendix lists the specifications for the 652
7
devices. These
specifications are typical at 25
°
C unless otherwise noted.
Digital I/O
PCI/PXI-6527......................................... 24 optically-isolated digital input
channels and 24 solid-state relay
output channels
Isolated Inputs
Number of input channels ...................... 24, each with its own ground
reference isolated from other
channels
Max input voltage .................................. 28 VDC
Digital logic levels
Input current
5 V inputs........................................ 1.5 mA/channel max
24 V inputs...................................... 8 mA/channel max
Isolation.................................................. 60 VDC channel-to-channel and
from computer ground and V
CC
Relay Outputs
Number of channels ............................... 24, each with two terminals that
are isolated from other channels
Relay type .............................................. Normally open form A solid-state
relays
Level
Min
Max
Input low voltage
0 VDC
1 VDC
Input high voltage
2 VDC
28 VDC
