Fieldbus coupler 750-342 • 21
Hardware
Modular I/O System
ETHERNET TCP/IP
3.1.2.4 Display
elements
The operating condition of the fieldbus coupler or node is signaled via light di-
odes (LED).
24V 0V
+ +
01 02
ON
LINK
TxD/RxD
I/O
ETHERNET
C
D
B
A
ERROR
status
voltage supply
-power jumper contacts
-system
Fig. 3-4:
Display elements 750-342
G
012901e
LED
Color
Meaning
ON
green
Fieldbus initialization is correct
LINK
green
Link to a physical network exists
TxD/RxD
green
Data exchange taking place
ERROR
red
Error on the fieldbus
IO
red /green
/ orange
The ’I/O’-LED indicates the operation of the node and signals faults
encountered
A
green
Status of the operating voltage – system
C
green
Status of the operating voltage – power jumper contacts
3.1.2.5 Configuration
interface
The configuration interface used for the communication with WAGO-I/O-
CHECK or for firmware download is located behind the cover flap.
Configuration
interface
open
flap
Fig. 3-5: Configuration interface
g012945e
The communication cable (750-920) is connected to the 4 pole header.
3.1.2.6
Hardware address (MAC-ID)
Each WAGO ETHERNET fieldbus coupler is provided from the factory with a
unique and internationally unambiguous physical ETHERNET address, also
referred to as MAC-ID (Media Access Control Identity). This address is to be
found on the rear of the coupler and on an adhesive tear-off label on the side of
the coupler. The address has a fixed length of 6 Bytes (48 Bit) and contains the
address type, the manufacturer’s ID, and the serial number.