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English
Interface description
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Notes on operation
The controller can be equipped with a serial digital interface for transmission of process values,
parameters and configuration data. The interface connections are on the rear of the controller, the
hardware is TTL compatible. Several instruments can be connected with separate cables to interface
modules and several interface modules can be operated by means of a bus. Via their RS 422/485
interface, data communication upto 1 km distance with master PLCs, PCs, visualization tools etc. is
possible (read and write). In remote mode of the controller, these tools can affect controller data (write)
by means of relevant programs. In this operation mode, modification of controller data by means of the
front keys is not possible.
The available protocol is based on ISO 1745.
In the controller, the internal digital interface is galvanically isolated from supply voltage and input and
signal circuits.
In the interface module, the instrument interfaces and the bus interface are interconnected but
galvanically isolated from the supply voltage.
The operating notes of the interface modules include further information for connection and operation.
Connecting examples for interface modules and masters
KS 40 / KS 50 / KS 90
Interface module
Master
Controller plug
Bus plug
RS 422
e.g. IQT 150
Master
RS 485
e.g. interface converter M-4
1
2
3
4
5
6
7
8
9
5
4
3
2
1
9
8
7
6
max. 1000m
GND
TXD-A
TXD-B
RXD-A
RXD-B
GND
TXD-B
TXD-A
RXD-B
RXD-A
1
2
3
4
5
6
7
8
9
16
15
14
13
12
RXD
TXD
TRE
GND
5 V
+
1
2
3
4
5
6
7
8
9
max. 1000m
1
2
3
4
5
DATA-B
DATA-A
RGND
DATA-B
DATA-A
RGND
English
Notes on operation
960612
1
Interface description 9499 040 47701
