Fieldgate FXA720
4 Hardware Installation
Hauser
15
4.2.2 Communication ports
Ethernet
The Ethernet port is labeled "ETH" and has been implemented as a 10Mbit/s or
100 Mbit/s (10Base-T/100Base-TX) connection with automatic baudrate recognition. The
connection is made using a RJ45 connector and a twisted pair category 5 cable.
• Use a crossover cable if Fieldgate is to be connected directly to a Ethernet NIC card in the
personal computer
• Use a straight through cable if the connection is to be made via a hub or switch
COM
The COM port is a RS-232C serial interface and for Service use only. The connection is made using
a 9-pin male D-sub connector with the following pin assignment:
Table 4-1: Pin assignment COM RS-232 port
PROFIBUS
Fieldgate FXA720 may be equipped with up to three PROFIBUS DP channels (RS-485) labeled
"DP1", "DP2" and "DP3". Each channel is electrically isolated up to a voltage of 500V DC. The
connecting element is a 9-pin female D-sub connector with the following pin assignment:
Table 4-2: Pin assignment of RS-485 PROFIBUS DP ports
Note!
• Please observe the installation guidelines for PROFIBUS devices, which are available from the
PROFIBUS Trade Organization, at www.profibus.com or in Hasuer Operating
Instructions BA034S/04/en.
Pin # Signal
Description
Pin # Signal
Description
1
Reserved
Do not connect
6
Reserved
Do not connect
2
RXD
Receive Data
7
Reserved
Do not connect
3
TXD
Transmit Data
8
Reserved
Do not connect
4
Reserved
Do not connect
9
Reserved
Do not connect
5
GND
Signal Ground
Pin #
Signal
Description
1
SHIELD
Housing
2
NC
Not assigned
3
RxD/TxD-P
PROFIBUS signal B/B’
4
/RTS
RTS
5
GND
Ground
6
VCC
Bus-termination power supply (load 10mA max.)
7
NC
Not assigned
8
RxD/TxD-N
PROFIBUS signal A/A’
9
NC
Not assigned
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