Installation •• 13
2.7 PCI-7250 and PCI-7251 Connection
There are 8 relay output and 8 isolation input on both PCI-7250 and
PCI-7251. The PCI-7251 is used as expansion of the PCI-7250. The
operations of PCI-7251 are the same as which in PCI-7250. There are
at most 3 PCI-7251 expansion boards to attach on the PCI-7250.
Therefore, the PCI-7250 can control up to 32 relays and sense 32
isolation signals. Figure 2.3 shows the block diagram of connecting
PCI-7250 and PCI-7251.
In addition, the existance of the PCI-7251 expansion boards can be
detected. Refer to the section 4.x. for using the function library.
PCI-7251 #1
PCI-7250 PCI-7251 #2
PCI-7251 #3