Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 586)

I/O Interface
Section 10A
10A-63
The Fast I/O feature provides 4 inputs to and 4 outputs from the control.
This feature is used to make changes in PAL that will take effect the next
iteration of the PAL program. Using the fast I/O feature, the operator can
input values to the PAL program using the PAL flag $HSIN and output
values using the PAL flag $HSOUT.
The fast I/O connector on the motherboard provides an interface port for
fast input and output to and from the control. This connector interfaces
with cable C11. Refer to page 7A-26 for additional information on cable
C11. Figure 10A.40 and Table 10A.AP show the connector and its pin
assignments.
Figure 10A.40
Fast I/O Connector (has pins)
1
5
11
7
9
3
13
15
2
4
8
10
12
6
14
16
10A.10
Fast I/O
(9/260 and 9/290 only)