Echelon LONWORKS PLT-22, User Manual

Page: 26 / 128

20
4
5 6 7
10
9
13
3
PLT-22
RXCOM
P
RXI
N
TX
OU
T
GND GND
CKSEL
1
CKSEL
0
PKD
VA CP4 CP2 CP1 CP0
CKOUT ~
R
ESET
GND
1 2 16
8
17
11 12 15
+5V
LIN
E
NE
UTRA
L
EAR
TH
+5V
56pF
56pF
Optional Packet Detect and Band-
In-
U
se Indi
cator
s
Power Supply
See C
hapter
5
+5
V
V
A
+5V
0.
1 µF
, 25V
DC,
5 places
VA
120
µF
, 16V
DC
A
lum
inum
E
lect
rolyt
ic.
Close t
o P
LT
-22 V
A
pin.
S
ee coupling
circuit
s in chapt
er 4
4.
7kž
BI
U
14
TX
LV
L
Coupling Circuit
19
XI
N
18
XO
UT
M
C
33064D
1
2
3
+5V
21
10M
Hz
470ž
470ž
Keep these l
ines shor
t.
See C
hapter
4
+5V
+5V
open
+5V open
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
CP4 CP3 CP2 CP1 CP0 VDD VDD VSS IO5 IO6 IO7 IO8 IO9
IO1
0
Neuron 3120 Chip
~
SERVI
CE
VSS VSS CLK1 CLK2
V
D
D
V
D
D
IO0 IO1 IO2 IO3 ~
R
ESET
VDD VSS VSS IO4
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
VSS
+5V +5V +5V
To User's
Application
Electronics
To User's
Ap plica tio n
Electr onics
Opti
onal
pow
er
suppl
y fi
lter
(n
o
t re
q
u
ire
d
f
o
r lin
e
a
r
pow
er
suppl
ie
s)
See
C
h
apter
5
Locate cl
ose to N
eur
on C
h
ip
V
DD bypass
5
GND for
7V p-
p
tr
ansm
it level;
Open for
3.5V p-
p
tr
ansm
it level
VA
Figure 2.3
Neuron 3120 Chip Application Schematic
VDD
5
VDD
10 µF
, 10V
DC,
T
A
NT
Close t
o P
LT
-22
VDD pin
5
capacit
ors:
2-12 Using the PLT-22 Transceiver