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7. Funktionell beskrivning
7.1 Blockdiagram
PWR
LED
0V
Line
switch
S1:4
Line
0V
S1:7
0V
Power Supply
F1
7.2 RS-422/485 anslutning
4-tråd
Tvinnade trådpar
TD-29
9
A'
Mottagare
8
B'
7
A
Sändare
6
B
NC
5
6611-2001
Amplifier S1:6
RD
DCD
LED
FSK
Demodulator
Isolated
Power Supply
RS-422
utrustning
A
Sändare
B
Mottagare
A'
B'
D-Sub
RD TD SG
DSR
RTS
2
3
5
6
0V
5V
TD LED
LED
MCU
+5V
0V
–5V
2-tråd
TD-29
7
Sändare/
Mottagare
6
NC
5
Screw terminal
CTS
CTS
RTS TD RD SG B
7
8
1
2
3
4
5
0V
S2:4
5V
S2:3
RTS LED
0V
S2:2
5V
CTS LED
S2:1
0V
Tvinnade trådpar
A/A'
A/A'
B/B'
B/B'
A B' A'
6
7
8
9
RS-485
utrustning
Sändare/
Mottagare
SE.13
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