
B–63505EN/02
2. HARDWARE
95
Mounting
location
Module name Specification Remarks
(1) PMC control module A20B–2900–0142 SA1, with I/O Link
A20B–2901–0660 SA3, with I/O Link
(2) Memory and spindle A20B–2902–0642 SRAM: 256KB, analog spindle control
module
A20B–2902–0643 SRAM: 256KB, serial spindle control
A20B–2902–0644 SRAM: 0KB, analog spindle control
A20B–2902–0645 SRAM: 0KB, serial spindle control
(3) FROM and SRAM A20B–2902–0341 SRAM: 256KB, FROM: 4MB
module
A20B–2902–0412 SRAM: 256KB, FROM: 4MB
A20B–2902–0411 SRAM: 256KB, FROM: 6MB
(4) Servo module A20B–2902–0290 For third/fourth axis
NOTE
A servo control circuit for the first/second axis is mounted on
the main board.
Bus I/F
Main CPU
SRAM (additional)
FROM and SRAM module
A/D conversion
I/O LINK PMC control module
DRAM
Memory card ³ Memory card I/F
Memory and spindle module
Spindle control
Servo module
Serial spindle
Analog spindle
SVM, pulse coder, linear
scale, etc.
SVM, pulse coder, linear
scale, etc.
First/second axis
control circuit
Third/fourth axis
control circuit
D Types of modules
mounted
D Block diagram