User`s manual

PK2200 Overview s 13
Figure 1-3 illustrates the PK2200 without an enclosure.
Figure 1-3. PK2200 Without Enclosure
Mux Mux
RT
RS232
U7U6
Z180
U15
H.C. Driver
LED
U2
Keypad
H1
H2
H3
JP4
Phone
Jack
Battery
PLC Bus Connector
LCD
RTC
U3
U4
U13
Buffer
Buffer
U5
PLD
U18
Mux
U19
U20
U14
Inv.
JP2 JP3
J2
U17
485
JP5
U1
L1 C1
Reset
Button
J3
J1
JP1
Y1
Y2
U9
U12
U10, U16 are under the EPROM
U8, U11 are under the SRAM
RS-232
DCIN
Beeper
SRAM
EPROM
RJ-12
RS-232
Connector