OBID
®
Installation
ID ISC.MU02.02
FEIG ELECTRONIC GmbH
Page 27 of 36
M91002-0de-ID-B.doc
E N G L I S H
8.2.2. RS232 interface
The length of the cable to the RS232 interface should be kept as short as possible, and must in
any case not exceed 3 m.
X2
Pin no.
Function
Description
3
TxD *
RS232 - Transmit Data
4, 9
GND **
Ground
5
RxD *
RS232 - Receive Data
*
Signal names as seen by the Reader Module.
** GND-Pins 4 and 9 are to be connected directly to each
other on the Reader Module
Table 3
: Pin assignments for the RS232 interface on X2
The transmission parameters for the interface can be software-configured. Table 4 shows the
standard parameters for the RS232 interface.
Parameter
Standard setting
Baud rate
38400
No. of data bits
8
Parity
Even
No. of stop bits
1
Table 4
: Standard parameters of the RS232 interface.
Note:
•
If there is an USB/RS232 converter used on the PC/Notebook side, we recommend to
increase the „Char Timeout Multiplier“ parameter in the COM-Port settings from „1“ to
about „10“.
•
IF there is a RS232 to TTL converter used without external power supply it may be nec-
essary to switch on the COM Port parameter “RTS” and “DTR” manually.
