IDENT-I • IRI-KHA6-4.RX, IRI-KHD2-4.RX
Serial interface/DIP switches
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
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Serial interface/DIP switches
The RS 232 serial interface is connected via the built-in 9-pin sub-D-connector. Alter-
natively, RS 422, RS 485 or 20 mA interfaces can be connected to the housing termi-
nals.
The interface standard is selected by setting DIP switches S7 and S8 located on the
upper face of control interface.
Since the control interface unit incorporates only one serial interface, which operates
with different drivers and receivers for the various standards, then only one standard
interface may be connected at any one time.
The transmission rate (baud rate) is set with DIP switches S1, S2 and S3 as follows:
Data is transmitted using one start bit, 8 data bits, one stop bit and no parity bit. The
control interface unit also responds to one-and-a-half and two stop bits.
In the basic fixed-code operating mode, the following data formats are possible:
8 data bits, no parity
7 data bits, even parity
7 data bits, odd parity
To set these transmission formats, the command RST (in upper or lower case, but not
in combination) must be sent to the control interface unit immediately after power on.
The control interface unit adjusts automatically to the required format.
In binary mode, the number of data bits to be transmitted is always 8. If 7 data bits are
set, the control interface unit will return the error message “M5” in response to the
command “SB”.
Standard
S7
S8
RS 232 / RS 485
open
open
RS 232 / RS 422
open
close
20 mA-current loop
close
open
Transmission rate
S1
S2
S3
300 Bd
open
open
open
600 Bd
open
open
close
1 200 Bd
open
close
open
2 400 Bd
open
close
close
4 800 Bd
close
open
open
9 600 Bd
close
open
close
19 200 Bd
close
close
open
not defined
close
close
close
