Overview 
 
FPΣ User's Manual 
12 
2.3.2 FPΣ Expansion Units 
A maximum of four dedicated FPΣ I/O expansion units can be connected on the left side of 
the FPΣ CPU. The 64-point expansion unit has 32 inputs and 32 transistor outputs. 
AB
 
A
 
FPΣ CPU 
B
 
Maximum expansion: 4 units 
1
 
Expansion unit 1 
2
 
Expansion unit 2 
3
 
Expansion unit 3 
4
 
Expansion unit 4 
Maximum number of I/O points 
CPU type  CPU 
Using FPΣ expansion units 
FPG-C32x  32 288 
FPG-C28x  28 284 
FPG-C24x  24 280 
 
NOTE
 
If both FP0 and FPΣ expansion units are used, the number of input and output 
points can be expanded to a maximum of 384 points for FPG-C32x.