Fieldbus Connection; Display Elements - WAGO -I/O-SYSTEM 750 User's Installation And Configuration

3.2.2.3

Fieldbus connection

Connection to the fieldbus is by a RJ45 connector. A category 5,
shielded/unshielded twisted pair cable (S-UTP) with an impedance of 100
Ohm ±15% is mandatory as a connecting line for the 10BaseT Interface.
The connection point is physically lowered for the coupler/controller to fit in
an 80 mm high switch box once connected.
The electrical isolation between the fieldbus system and the electronics is
achieved by means of DC/DC converters and optocouplers in the fieldbus in-
terface.
Fig. 3-19: RJ45-connector and RJ45 connector configuration
3.2.2.4

Display elements

The operating condition of the fieldbus controller or node is displayed via light
diodes (LED).
ETHERNET
Fig. 3-20: Display elements 750-842
LED
ON
LINK
TxD/RxD green
ERROR
IO
USR
A
C
Modular I/O System
ETHERNET TCP/IP
01 02
ON
A
C
B
LINK
D
TxD/RxD
24V 0V
ERROR
I/O
+ +
USR
Color Meaning
green Fieldbus initialization is correct
green Link to a physical network exists
Data exchange taking place
red Error on the fieldbus
red /green The 'I/O'-LED indicates the operation of the node and signals faults
/ orange encountered
red /green The 'USR' LED can be selected by a user program in a programma-
/ orange ble fieldbus controller
green Status of the operating voltage – system
green Status of the operating voltage – power jumper contacts
Contact Signal
1 TD +
2 TD -
3 RD +
4
5
6 RD -
7
8
status
voltage supply
-power jumper contacts
-system
Fieldbus controller 750-842 • 51
Transmit +
Transmit -
Receive +
free
free
Receive -
free
free
Hardware
G012902e