Rockwell Automation 57C428 Toledo Scale Interface Module - Manual (Page 33)

BĆ1
Appendix B
Module Block Diagram
TOLEDO SCALE INTERFACE MODULE (57C428)
LED
Display
0
1
Thumbwheel
Switches
Z80
CPU
CPU
Watchdog
OK
Dual Port
Arbitration
and
Control
Logic
8K Byte
Dual Port
Memory
Address
Decode
16K Byte
EPROM
Wait
Read
Write
Address
Address and
8K Byte
RAM
4 Channel
Counter
Timer
Serial
Interface
XMIT
RECV
DTR
2
3
4
5
20
7
Control Bus
Address
ID BUS
Address
Bus
+5V
+12V
-12V
BUS
Date