Device Supply; Fieldbus Connection; Rj45-Connector And Rj45 Connector Configuration - WAGO -I/O-SYSTEM 750 User's Installation And Configuration

20 • Fieldbus coupler 750-342
Hardware
3.1.2.2

Device supply

The supply is made via terminal bocks with CAGE CLAMP® connection. The
device supply is intended both for the system and the field units.
Fig. 3-2: Device supply
The integrated internal system supply module generates the necessary voltage
to supply the electronics and the connected I/O modules.
The fieldbus interface is supplied with electrically isolated voltage from the
internal system supply module.
3.1.2.3

Fieldbus connection

Connection to the fieldbus is by an 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. 3-3: RJ45-connector and RJ45 connector configuration
Contact Signal
1 TD +
2 TD -
3 RD +
4
5
6 RD -
7
8
G
034201e
Transmit +
Transmit -
Receive +
free
free
Receive -
free
free
Modular I/O System
ETHERNET TCP/IP