GW-7553-B / GW-7553-M PROFIBUS/Modbus TCP Gateway User Manual
(Version 1.35, May/2017)
PAGE: 9
Table 5 PROFIBUS DB9 Female Connector
Pin
Name
Description
1
-
N/A
2
-
N/A
3
B
Non-inverting Bus Line
4
ISODE
Isolated DE output for use in PROFIBUS
applications where the state of the isolated drive
enable node needs to be monitored.
5
GND
Power supply ground for the first node and the last
node
6
VP
+5V Power Supply for the first node and the last
node
7
-
N/A
8
A
Inverting Bus Line
9
-
N/A
2.3 Wiring
GW-7553-B / GW-7553-M supports PROFIBUS to Serial or Ethernet
communication. It is recommended to use only one communication interface (RS-
232 or Ethernet) of the Gateway at the same time. The following section describes
the connection interface of GW-7553-B / GW-7553-M.
2.3.1 RS-232 connection
Pin
Name
Description
1
TX+
TX+ output
2
TX-
TX- output
3
RX+
RX+ input
4
-
N/A
5
-
N/A
6
RX-
RX- input
7
-
N/A
8
-
N/A