48 | Maintenance Instructions TOPAX DX | BA-40100-0-V04
Chapter 17: Wiring diagrams
Example 8
PC - Connection with TOPAX network
WARNING!!
Lock the data line using a 120 Ohm terminal resi-
stance at both sides and make sure to apply a fixed
potential at the last TOPAX in the network.
To set the terminator and potentiai plugging the 2
jumpers on the display board of your TOPAX DX (see
chapter 4.4).
Plug the 120 Ohm terminal resistance at the RS232
<-> RS485 converter on the other side of your net-
work.
DO4 DO3 DO2 DO1
78404
78403
78402
DO7
DO6
DO5
DO0
78399
B
A
78406
interface board
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
20 mA
power outputs
digital inputs
36
37
38
PE
N
L
power generator
33
34
92
93
94
87
88
89
90
91
86
-
+
81
82
83
84
85
-
-
+
+
alarm relays
39
40
41
43
44
45
46
42
35
95
96
B
A
Max. length of the network: 1000m
Auxiliary power 5 VDC
(USB plug connector)
120 Ohm
terminator
Converter
RS232 <=> RS485
Order-Nr
. 44300101
RS 232 (9pin)
Computer
(T
opV
iew Software)
Display circuit board
120 Ohm terminator: ON
Pull-Up / Pull-Down resistances:ON
-> both jumper at ON
(see chapter 4.4)
Last
T
OP
AX DX in the network
(max.14 devices)
T
OP
AX
(DX, DE, L, LF
, N, NT)
B
A
T
OP
AX
(DX, DE, L, LF
, N, NT)
