Echelon LonWorks Router - Manual (Page 77)

CP0
CP1 CP3
RST~ CP4
32 RX
34 TX 38
28 39
Router 5000 FTT-10A Transceiver
8
NETB
NETA
R1
10k
+3.3 V
+5 V
RXD
TXD
GND
VCC
8
5
4
1
NET_A
NET_B
2
3
GND
36
VDD3V3
Low drop-out
linear regulator
INPUT
+5 V OUTPUT
+3.3 V
C5
0.1 µF
C4
1 µF
OE
10 MHz
18 pF C2
30 pF
C1
33 pF
R3
200
R2
1M
XOUT XIN
CLK
6
+5 V
23 24
GROUND GUARD
U1
U2
U3
CP2
37
T1
T2
9
7
D1
D2
C6
0.1 µF
+5 V
C9
22 µF
C8
22 µF
+
+
C7
1000 pF
D3
D4
PCB Spark Gaps
Or
Fast Surge
Protectors with
Microgap
C3
0.1 µF
+5 V
Figure 34. Connecting a Router 5000 to an FTT-10A Transceiver
Table 15. Example Bill of Materials for the FTT-10A Circuit
Designator Value
C1 33 pF
C2 30 pF
C3, C5, C6 0.1 µF
C4 1 µF
C7 1000 pF
C8, C9 22 µF, 50 V, polar
D1, D2, D3, D4 BAV99 or 1N4148 (x2)
R1 10 kΩ
R2 1 MΩ
R3 200 Ω
L ON W ORKS Router User’s Guide 67