2105552MNAE  |  RMC-100  |  39 
Figure 3-11: Connect RMC to other ABB devices 
Never connect Ethernet 1 and Ethernet 2 to the same Ethernet switch (Figure 3-12
). Connecting both 
ports to the same switch disables both ports. 
Figure 3-12: Wrong Ethernet connection 
3.6.2  Connect TFIO modules 
The RMC has two TFIO ports. Each port requires a TFIO installation kit that includes the cable to 
connect the TFIO modules to the RMC. For additional information, refer to the TFIO Module User 
Manual under Additional information. 
Host
System
Other ABB devices such as
XFC, XRC, and NGC
TCP/IP
network
Ethernet 1
Ethernet 2
10/100 BaseT
Ethernet switch or hub
Host 
system
with 
PCCU
Ethernet 2
Ethernet 1
10/100 BaseT
Ethernet switch or hub
DO NOT SET UP THIS CONNECTION
Do not connect Ethernet 1 and Ethernet 2 
ports to the same Ethernet switch or hub