Echelon LonWorks Router Bedienungsanleitung Seite 54
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Figure 20 shows example RX and TX network activity indicator circuits for a
Router 5000 half-router connected to an EIA-485 transceiver. You can use the
same network activity circuits for other transceiver types, although other
transceiver types have different connections to the Router 5000. See Developing
a Router with the Router 5000 Chip for more information about connecting
external transceivers to a Router 5000.
Both network indicator circuits use non-inverting bus buffer/line drivers that
support TTL-compatible input and 5V CMOS output (assuming a transceiver
that requires 5 V supply voltage). Both circuits also use standard rectifying
diodes; if your transceiver uses 3.3 V supply voltage, consider replacing these
diodes with Schottkey diodes.
For the TX network indicator, the Router 5000 CP2 pin (TX Enable) is low when
idle. However, for the RX network indicator, the Router 5000 CP0 pin (RX)
retains its state from the end of the previous received bit, and thus can be high or
low when idle.
TLC372
CP
0
CP1
CP3
CP2
CP4
32
RX
34 TX
38
37
TXEN
39
Router 5000
VDD3
V
3
+3
.
3 V
8
10k
10
k
+3
.3
V
500
BAV99
0
.1 µF
1M
604
TLC
372
0
.1 µF
604
BAV
99
1 µF
BAV99
1M
R
RE
~
DE
D
A
B
VDD
GND
EIA-485
Transceiver
+5
V
0
.1
µF
12V
12V
MUR115
(x4)
A
B
RX Activity Indicator
TX Activity Indicator
+
5 V
+5
V
+
5 V
+5 V
500
Figure 20. RX and TX Network Activity Indicator Circuits – Router 5000
When packets are transmitted, the TX network activity LED is active for the
duration of the entire data transmission. When packets are received, the RX
network activity LED is active for each bit received, and inactive between bytes.
For both circuits, the approximate time constant for LED visibility is 100 ms.
44 LONWORKS Router Electrical Interfaces
- LONWORKS 1
- Router 1
- User’s Guide 1
- Welcome 3
- Audience 3
- Related Documentation 3
- Getting Support 4
- FCC Notice 5
- VDE Notice 5
- Canadian DoC Notice 5
- Table of Contents 7
- ONWORKS Routers 11
- LONWORKS Router Products 13
- RTR-10 Overview 14
- ONWORKS 15
- LonWorks Router Based on the 17
- Router 5000 17
- FT Router 5000 17
- ONWORKS router 18
- Router Types 19
- Repeater 19
- Configured Router 19
- Learning Router 20
- Channel A 23
- Router 1 Router 2 23
- Channel B 23
- Power Line Routers 23
- PL Phase A 24
- PL Phase B 24
- Message Receiving Side 25
- Message Sending Side 25
- Direction of Message Flow 25
- Router Performance 28
- LONWORKS Router Electrical 31
- Interfaces 31
- Overview 32
- Electrical Interface 32
- RTR-10 Electrical Interface 32
- ACLK2, BCLK1, and BCLK2 34
- ACP[4..0] and BCP[4..0] 34
- ASVC~ and BSVC~ 34
- AXID[4..0] and BXID[4..0] 34
- Note: RTR-10 Modules 36
- SERVICE~ 37
- Router 5000 Pinout 37
- FT Router 5000 Pinout 39
- Clock Pins (XIN and XOUT) 42
- CP[4..0] – Router 5000 Only 44
- IO[11..0] 46
- SCL, and SDA_CS1~) 47
- Power and Ground 47
- RX Activity Indicator 54
- TX Activity Indicator 54
- Power Requirements 55
- RTR-10 Power Requirements 55
- Low Voltage Protection 56
- LONWORKS Router Mechanical 59
- Developing a LONWORKS Router 65
- Using Custom Transceivers 68
- Differential Driver Circuit 71
- Comparator Circuit 72
- Using an EIA-485 Transceiver 74
- Using an FTT-10A Transceiver 75
- GROUND GUARD 77
- Input Output 89
- NodeBuilder Device Template 91
- Buffer Configurations 92
- Example Neuron C Source 93
- ONWORKS Router Design Issues 95
- PCB Layout Guidelines 96
- Power Supply 97
- Circuitry 97
- EMI Design Issues 99
- Compatibility) 99
- EMC Design Tips 99
- ESD Design Issues 100
- Installing a LONWORKS Router 103
- Introduction 104
- Defining a Network Topology 104
- Connecting Power 105
- Messages 106
- Testing Router Installation 107
- Network Management Messages 109
- Standard Messages 110
- Router-Specific Messages 111
- Set Router Mode 112
- Group Forward 113
- Subnet Forward 114
- Group No Forward 114
- Subnet No Forward 114
- Router Status 115
- Far Side Escape Code 116
- Set Routing Algorithm 116
- Set Buffer Size 116
- LONWORKS Routers 119
- Communications Parameters 120
- Determining RTR-10 Firmware 127
- Version 127
- Router Firmware Version 128
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