BA-40100-0-V04 | Maintenance Instructions TOPAX DX | 9
Chapter 4: Installation
• Temperature sensor Pt100
• Position feedback of an eventual servo motor with potenti-
ometerr
3-fold input board (Order-No. 78404)
with 3 measurement inputs for:
• Free chlorine potentiostatic electrode
• Position feedback of an eventual servo motor w. potentiometer
• 0/4 0 mA power entrance for the connection of a distur-
bance factor or a conductivity measuring unit with upstream
measuring amplifier
IMPORTANT!
When free chlorine potentiostatic electrode is used
in a 5-fold input block, it is possible to connect also
a total-chlorine electrode. At the same time bonded
chlorine is calculated by PC and displayed.
Output board (Order-No. 78399)
On the output block there are 5 integrated relay output and 3
electronic outputs (optocouplers).
The following output can be configured:
• Controller output free chlorine with different functions
• Controller output pH value with different functions
• Controller output bonded chlorine with different functions
• Controller output conductivity with different functions
• DIN contact – Free contact if all conditions of the DIN-
Standards are respected.
• Contact for starting of the flocking pump.
These outputs are assigned automatically in the software con-
figuration.
1. Automatic controller free chlorine
. Automatic controller pH value
3. Automatic controller bound chlorine
4. Automatic controller conductivity
5. DIN - contact
6. Eco - contact
Depending upon output type, TOPAX DX 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 81/8 bis 85/86 for
optocouplers.
NOTE!
See also terminal clips in Chapter 4.6
Interface board RS 485 (Order-No. 78406)
The TOPAX DX has the option of being fitted with a serial inter-
face RS 485. The RS 485 allows you to transfer data to a PC.
The MODBUS-Protocol is installed for the protocol of the data
transfer.
With the RS 485 interface it is possible to connect more than one
TOPAX DX to a network. For this purpose each TOPAX DX has
to be allocated an address. In addition to this each TOPAX DX 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 TOPAX DXs can be connected to
a network with a PC.
An example of a network with more than one device is shown in
chapter 17.
BEWARE!
The data line is to be attached direct to the connec-
ting terminals of the TOPAX (clip A and B). Separate
clamping or branching boxes should not be set. The
network address 10 is not allowed.
IMPORTANT!
For the realization of a network with the TOPAX DX
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
Use of simple cables can cause data errors and affect the data
communication for which the manufacturer will not be liable!
The screen is to be connected, for electromagnetic compatibility
reasons, before the doing the various connections and these are
to be secured with protective ground. In this measure it must be
guaranteed that over the screen no potential equalization stream
can flow. The connection with GND and the shielding are to be
accomplished in accordance with DIN/VDE 0160 and DIN 57
899/VDE 0800.
Most modern computers are equipped with the serial computer
interface R-S 3 and/or with USB - interfaces. For this reason
the data with an interface converter R-S 485 R-S 3 or R-S 485
USB are to be converted.
The interface board RS 485 is placed in the rear shell of the
TOPAX DX device, between main board and 3-fold output block.
There are interface components in the under casing part of the
main board in the TOPAX DX. They are partially hidden from view
by the output components (see Fig. 4.6).
Fig. 4.6: RS 485 connections on the interface component’s board partially hid-
den from view by the output components.
