ABB AC 800M

Section 1 Introduction PM8xx/TP830 Processor Unit – General
3BSE036351-510 A 35
Figure 4. PM851/PM856/PM860 – Functional Block Diagram
PM851/PM851A is restricted to one Ethernet (CN1) port.
4
Power
+5V DC
+3.3V DC
Battery
(+3.3V)
System and
user mem.
CEX-bus
controller
ModuleBus
controller
Electrical
Optical
DC
Compact Flash
Logic
Communication
controllers
CPU
INIT
F
B
R
Ethernet
CN1 CN2 COM3 COM4
RS232 RS232
4
4
8 4
Ethernet
+BV
External
battery
CEX-bus
3
P
RTC