Endress+Hauser RA33 - 4.5.3 Modbus RTU (Optional); 4.5.4 Printer Interface; RS232 (Optional); 4.6 Post-connection Check

Wiring RA33
20 Endress+Hauser
a0014600
Fig. 18: Ethernet TCP/IP, Modbus TCP connection
1Ethernet, RJ45
2 Cable entry for Ethernet cable
4.5.2 Modbus TCP (optional)
The Modbus TCP interface is used to connect the device to higher-order systems to transmit all
measured values and process values. The Modbus TCP interface is physically identical to the
Ethernet interface (→ ä 19). Connection → å 18.
4.5.3 Modbus RTU (optional)
The Modbus RTU (RS-485) interface is galvanically isolated (testing voltage: 500 V) and used to
connect the device to higher-order systems to transmit all measured values and process values.
It is connected via a 3-pin plug-in terminal in the housing cover.
a0014603-en
Fig. 19: Modbus RTU connection