6: ALLOCATION NUMBERS6-18 « FC4A MICRO SMART USER ’S MANUAL »Expansion I/O Module OperandsExpansion I/O modules are available in digital I/O modules and analog I/O modules.Among the all-in-one type CPU modules, only the 24-I/O type CPU modules (FC4A-C24R2 and FC4A-C24R2C) canconnect a maximum of four expansion I/O modules including analog I/O modules.All slim type CPU modules can connect a maximum of seven expansion I/O modules including analog I/O modules.I/O Expansion for All-in-One Type CPU ModulesA maximum of four input, output, mixed I/O, or analog I/O modules can be mounted with the 24-I/O type CPU module, sothat the I/O points can be expanded to a maximum of 78 inputs or 74 outputs. The total of inputs and outputs can be a max-imum of 88 points. Input and output numbers are automatically allocated to each digital I/O module, starting with I30 andQ30, in the order of increasing distance from the CPU module. Expansion I/O modules cannot be mounted with the 10-and 16-I/O type CPU modules (FC4A-C10R2, FC4A-C10R2C, FC4A-C16R2, and FC4A-C16R2C).I/O Allocation Numbers (All-in-One Type CPU Modules)Example:The system setup shown above will have I/O operand numbers allocated for each module as follows:The I/O numbers of the CPU module start with I0 and Q0. The I/O numbers of the expansion I/O modules start with I30and Q30. The mixed I/O module has 4 inputs and 4 outputs. When an I/O module is mounted next to a mixed I/O module,note that the allocation numbers skip four points as shown above.Input and output modules may be grouped together for easy identification of I/O numbers. When the I/O modules are relo-cated, the I/O numbers are renumbered automatically.OperandFC4A-C10R2FC4A-C10R2CFC4A-C16R2FC4A-C16R2CFC4A-C24R2FC4A-C24R2CAllocation No. Points Allocation No. Points Allocation No. PointsInput (I) I0 - I5 6 I0 - I7I10 9 I0 - I7I10 - I15 14Expansion Input (I) — — — — I30 - I107 64 (78 total)Output (Q) Q0 - Q3 4 Q0 - Q6 7 Q0 - Q7Q10 - Q11 10Expansion Output (Q) — — — — Q30 - Q107 64 (74 total)Slot No. Module I/O Operand Numbers24-I/O Type CPU Module I0 to I7, I10 to I15, Q0 to Q7, Q10 and Q111 16-pt Input Module I30 to I37, I40 to I472 Analog I/O Module See page 24-8.3 4/4-pt Mixed I/O Module I50 to I53, Q30 to Q334 8-pt Input Module I60 to I6724-I/O Type Input16-ptInputAnalog Mixed4-ptInputInput8-ptInputSlot No.: 1 2 3 4Module I/O I/O Module4-ptOutput14-pt Input10-pt OutputCPU ModuleExpansion I/O Modules (4 maximum)ModuleModule
