EUCHNER AS-i 3.0 PROFIBUS Gateway with integrated Safety Monitor for 2 AS-i circuits - Manual (Page 47)

AS-i 3.0 PROFIBUS Gateway with integrated Safety Monitor
Electrical connection
Subject to reasonable modifications due to technical advances Id.-No.: 103329 Issue date - 24.10.2008 EUCHNER GmbH + Co. KG 47
Kohlhammerstraße 16 • D-70771 Leinfelden-Echterdingen Tel. +49/711/75 97-0 • Fax. +49/711/753316
7.6 PROFIBUS interface
The PROFIBUS interface is designed as a 9-pin D-SUB connector, in accordance
with the PROFIBUS standard EN 50 170. It is located at the top left-hand side of
the master.
.
The AS-i/PROFIBUS gateway sends and receives signals on pins 3 and 8 of the
D-SUB connector. The PROFIBUS signal “RxD/TxD-N (data line A)
1
” is located
on pin 8, the signal “RxD/TxD-P (data line B)
1
” is located on pin 3.
Pin 5 (0 V) and pin 6 (5 V) supply 5 V DC for the bus termination resistor.
7.6.1 Terminating resistors on the PROFIBUS network
PIN Designation of the D-SUB
connector
Pin 3 Data line B („RxD/TxD-P“)
Pin 5 DGND (0 V)
Pin 6 VP / +5 V
Pin 8 Data line A („RxD/TxD-N“)
5
4
3
2
1
9
8
7
6
RxD/TxD-P
(data line B)
RxD/TxD-N
(data line A)
PROFIBUS
VP / +5 Volt)
DGND (0 Volt)
1. If you measure the DC voltage between RxD/TxD-P (data line B) and RxD/TxD-N (data line A),
RxD/TxD-P (data line B) is the positive pole when the bus is silent.
A A A
B B B
390
220
390
Host
AS-i Master AS-i Master
390
220
390
5V 5V
GND GND