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Table 3-2
Pin-No.
USB
Connections at port A
If the interface is used for communication with the device, the data connection is to be checked.
Table 3-3
Pin-No.
1
2
3
4
5
6
7
8
Connections at port B
When a serial interface of the device is connected to a control center, the data connection must be checked. A
visual check of the assignment of the transmit and receive channels is important. With RS232 and fiber optic
interfaces, each connection is dedicated to one transmission direction. For that reason the data output of one
device must be connected to the data input of the other device and vice versa.
Table 3-4
Pin-No.
RS232
1
Shield (electrically connected with shield shroud)
2
RxD
3
TxD
A/A' (RxD/TxD-N)
4
–
5
GND
C/C' (GND)
6
–
7
RTS
8
CTS
B/B' (RxD/TxD-P)
9
–
1)
Pin 7 also carries the RTS signal with RS232 level when operated as RS485 interface. Pin 7 must therefore not be
connected!
With data cables, the connections are designated according to DIN 66020 and ISO 2110:
•
TxD = Data output
•
RxD = Data input
•
RTS = Request to send
•
CTS = Clear to send
•
GND = Signal/Chassis Ground
SIPROTEC 4, 7RW80, Manual
C53000-G1140-C233-4, Edition 07.2018
Assignment of the USB socket
1
2
VBUS
D-
(unused)
Assignment of the port A socket
Ethernet interface
Tx+
Tx-
Rx+
—
—
Rx-
—
—
Belegung der Buchsen Port B
RS485
Profibus DP, RS485
–
–
B/B' (RxD/TxD-P)
–
CNTR-A (TTL)
C/C' (GND)
–
+5 V ((max. load
<100 mA)
–
–
1)
A/A' (RxD/TxD-N)
–
–
3
4
D+
GND
Modbus RS485
Ethernet
EN 100
DNP3.0 RS485
Tx+
–
Tx–
A
Rx+
RTS (TTL level)
—
GND1
—
VCC1
Rx–
–
—
B
—
–
not available
Mounting and Commissioning
3.2 Checking Connections
Housing
Shield
IEC 60870–5–103
redundant
B/B' (RxD/TxD-P)
A/A' (RxD/TxD-N)
–
–
–
–
–
–
not available
141
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