44 •
Fieldbus Coupler
Fieldbus Coupler 750-341
WAGO-I/O-SYSTEM
750
ETHERNET TCP/IP
Attention!
Only for use in LAN, not for connection to telecommunication circuits!
3.1.2.4 Display Elements
The operating condition of the coupler or the node is displayed with the help
of illuminated indicators in the form of light-emitting diodes (LEDs).
The LED information is routed to the top of the case by light fibres. In some
cases, these are multi-colored (red/green or red/green/orange).
24V 0V
+
+
01 02
LINK
MS
NS
I/O
ETHERNET
C
D
B
A
TxD/RxD
USR
C
B
A
24V 0V
+
+
01 02
LINK
MS
NS
I/O
ETHERNET
C
D
B
A
TxD/RxD
C
B
A
C
A
24V 0V
+
+
01 02
LINK
MS
NS
I/O
ETHERNET
C
D
B
A
TxD/RxD
C
B
A
A
B
C
A
Fig. 3.1-3: Display Elements 750-341
g034102x
LED
Color
Meaning
LINK
green
Link to a physical network exists
MS
red/green
The ‚MS‘-LED indicates the state of the node (Module State)
NS
red/green
The ‚NS‘-LED indicates the state of the network (Network State)
TxD/RxD green
Data exchange taking place
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 or B
green
Status of the operating voltage – power jumper contacts
(LED position is manufacturing dependent)
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. 3.1-2: Configuration interface
g012945e
The communication cable (750-920) is connected to the 4 pole header.
