©
National Instruments Corporation
4-1
PCI-4451/4452/4453/4454 User Manual
4
Signal Connections
This chapter describes how to make input and output connections to your
PCI-445X.
The 68-pin analog I/O connector for the PCI-445X connects to the
BNC-214X DSA accessories through the SHC68-C68-A1 shielded cable.
You can access the analog I/O of the PCI-445X using standard BNC
connectors on the BNC-214X.
♦
PCI-4451/4452
The digital I/O connector for the PCI-4451/4452 has 50 pins that you can
connect to generic 68-pin terminal blocks through the SHC50-68 shielded
cable. You can connect the digital I/O signals to the shielded cable through
a single 50-pin connector.
♦
PCI-4453/4454
This device does not have a digital I/O connector, but instead has an SMB
connector for external digital triggering.
I/O Connectors
Table 4-1 describes the pin assignments for the 68-pin analog I/O
connector. Table 4-5 describes the 50-pin digital connector on the
PCI-4451/4452. A signal description follows the connector pinouts.
Caution
Connections that exceed any of the maximum ratings of input or output signals
on the PCI-445X can damage the device, the computer, and associated accessories.
Maximum input ratings for each signal are given in the Protection column of Tables 4-2,
4-4, and 4-6. National Instruments is not liable for any damages resulting from such signal
connections.
