Digi DS-425 - Hardware Specification; Main Components; Block Diagram; Electronic Connection Diagram

DS-425 Service Manual --- V1.04
5. Hardware Specification
5.1. Main Components
• Microcomputer: ATMAL AT89C52 8 bit
• LCD Display Driver: NEC uPA7225G
• A/D Board: STB-0054, (FOR DS-422), New A/D Cover.
5.2. Block Diagram
A/D BLOCK
STB-0054-3
LOADCELL BLOCK
INTERNAL
MAIN BOARD BLOCK
STB-0052-4
(WITH OPERATE DISPLAY)
POWER
BLK AX
5.3. Electronic Connection Diagram
RS-232
Interface
Operator Display
Display Driver
Keyboard Main CPU AT89C52 (MCS51)
A/D Block
STB-0052-3
Scale
Internal Block
Interface
Driver
Power
Block
AC Input
05 Hardware Specification Page No. 19