Omron WIRED REMOTE I-O System Manual page 22

Basic System
Total I/O Points
10
The total number of I/O points in the System must not exceed the number of
I/O points provided by the PC to which the Master(s) is mounted or
connected.
PC Maximum Number of I/O Points
C2000H
C1000H
C500
C120
*The total number of I/O points in a C1000H System can be up to 2,048, as
long the number of I/O points on the CPU Rack and Expansion I/O Racks
connected to the CPU Rack (i.e., not I/O points on Slave Racks) is limited to
1,024.
Total number of points for the PC
=
Total number of points on CPU Racks and
Expansion I/O Racks
+
Total number of points on Slave Racks
+
Total number of points on Remote Terminal
+
Total number of points in Optical Remote Subsys-
tems
2,048
2,048*
512
256
Section 2-1