8 | BA-40400-02-V14
Two-Channel Controller TOPAX DE
4.4 Technical components
Besides the main board, the following can be fitted in addition
• up to 2 input components
• an output component and
• an Interface module (RS 485)
To operate the TOPAX at least one entry component has to be built in.
output block
mainboard
DO4
DO3
DO2
DO1
DO7 DO6 DO5
DO0
PC interface RS 485
+ -
+ -
+ - + - + - + - + - + -
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 Outputs
36
37
38
PE
N
L
power generator
33
34
92
93
94
87
88
89
90
91
86
- +
81
82
83
84
85
-
-
+
+
56
57
58
59
60
- +
51A
52A
53
54
55
61
51B
52B
-
-
+
+
-
+
71
72
73
74
75
76
77
78
5-fold input block
Alarm relays
39
40
41
43
44
45
46
42
35
95
96
B
A
3-fold
input block
Plugin connector
to the display circuit board
Fig.3: Arranging the components on the main board
4.4.1 Main board
Besides this function, to incorporate the further components, the main
board is made up of the following connections:
• 5 analogue power inputs (0/4 … 20mA)
• 5 digital inputs
• Alarm relay
• power supply
4.4.2 5-fold Input block
with 5 measurement inputs for:
• Dinsinfection (single amperimetric electrode or encapsulated
electrode) (0/4...20 mA)
• pH single-rod measuring cell
• Redox single-rod measuring cell
• Temperature sensor Pt100
• Position feedback of a servo motor with potentiometer
4.4.3 3-fold Input block
with 3 measurement inputs for:
• Disinfection (potentiostatic measuring cell)
• Position feedback of a servo motor with potentiometer
• 0/4 20 mA power entrance for the connection of a disturbance
variable
4.4.4 Output board
On the output block there are 5 integrated relay output and 3 electronic
outputs (optocouplers).
The following output can be configured:
• Control output Disinfection
with various output functions
• Control output pH-value
with various output functions
The software configuration automatically assigns these outputs to the
respective terminals in a sequential order- depending on the configura-
tion of the TOPAX:
1. Disinfection controller
2. Controller pH value
Depending upon output type, TOPAX selects the next free relay output or
optocoupler. The clamps are assigned in a firm order: clamps 87/88 to
95/96 for relays, or 81/82 bis 85/86 for optocouplers.
NOTE!
For further information on the terminal connection,
refer to section “4.7 Terminal clips of the main board
and the technical components” on page 11.
4.4.5 Interface board RS 485
The TOPAX has the option of being fitted with a serial interface RS 485.
The RS 485 allows you to transfer data to a PC. The MODBUS protocol
serves as data transmission protocol.
With the RS 485 interface it is possible to connect more than one TOPAX
to a network. For this an address is to be assigned to each TOPAX. In
addition to this each TOPAX is fitted with a computer-interface RS 485.
It is possible to have a maximum of 1000 m of data transfer with the
RS 485 interface. Up to 14 TOPAXs can be connected to a network with
a PC.
ATTENTION!
The data line is to be attached direct to the con-
necting terminals of the
TOPAX
(clip A and B, see
Fig.4). Separate external connection or distribution
boxes must not be set. The network address 10 is
not permitted.
IMPORTANT!
For the realization of a network with the
TOPAX
and
the structure of a bus system to a PC a computer
cable "KAT.5 type 2X2XAWG24/1 (Lapp cable)" or
better is to be used.
Using other cables can cause
data errors and affect the data transmission. The
manufacturer is not liable for this.
Most modern computers are equipped with the serial computer interface
R-S 232 and/or with USB - interfaces. For the connection to a RS 485
network, an additional connector converter (RS 485 to RS 232 or RS
485 to USB) is necessary.
There are interface components in the under casing part of the main
board in the TOPAX. It is partially hidden from view by the output module.