Identifikation System OBID
Page 20 of 26
FEIG ELECTRONIC GmbH
E N G L I S H
4.1
Digital Inputs (IN1 / IN2)
:
The both digital inputs must be connected to "intern GND“ (blue). A connection to extraneous volt-
age might damage the unit.
ID RWA02
IN1 bzw. IN2
interner GND
U
B
Figure 1: connection of digital inputs
4.2 RS485 Interface (ID RWA02.ABCD-B / -BL):
The terminating resistor of the reader is for the termination of the RS485 bus. It is only necessary
at the end of the bus - at the last reader. Therefore the red-blue / PIN 10 wire must be connected
with the yellow wire / PIN 8 (RS485-A).
The bus operation requires a central PC with terminating resistor and the termination set active
(see Figure 2).
Host
without termination
green / 7
yellow / 8
red-blue / 10
ID RWA02
ID RWA02
ID RWA02
100 Ohm
(with termination)
with termination
fig 2: bus connection with ID RWA02.ABCD-B / -BL
4.3 RS232 Interface (ID RWA02.ABCD-A /-AL)
Readers with RS232 interface have to be connected to the host according to fig 3: connection of
the RS232-interface".
Host
green / 7
yellow / 8
Reader
blue / 4
GND
RxD
TxD
fig 3: connection of the RS232-interface
