2 15 RS-485
2 15 RS-485
36
TX1
TX1
TX1
TX1
TX2
TX2
TX2
TX2
Terminator
220 ohms / 0.5W
Terminator
220 ohms / 0.5W
Max. 247 units can be linked
Max. 247 units can be linked
RS-232
PC
SNA10A or
SNA10B
SNA10A or
SNA10B
Figure 2.18
RS-485 Wiring
Figure 2.18
RS-485 Wiring
RS-485 to RS-232
network adaptor
RS-485 to RS-232
network adaptor
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Shielded Twisted-Pair Wire
Shielded Twisted-Pair Wire
DB-9 Serial
Cable
DB-9 Serial
Cable