Yokogawa Extractive Oxygen Gas Analyzer TDLS220 - Manual (Page 21)

<4 ANALYZER COMPONENTS> 4-6
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
RIU Interconnect to TDLS220 Control Unit(s)
When connecting just one analyzer to the RIU there are two twisted pair wires to consider , there are only
four wires to be terminated to make the 10/100 Ethernet connection
RIU Optional Ethernet Switch
If there is more than one analyzer connected to the RIU, then they are routed via an industrial Ethernet
switch. Up to four analyzers can be routed through one RIU switch. The switch is powered by 24VDC from
the back-plane and includes several status LEDs.
Analyzer
Integral SBC
TB6
Tx+ Tx- Rc+ Rc-
RIU
Integral SBC
RIU Switch or
Field Terminals
Tx Tx Rc Rc
Figure 5 - Connecting RIU to Analyzer(s)
Analyzer 1
SBC
Analyzer TB6
Tx Tx Rc Rc
Ethernet
Switch
Feed‐through
Board
Tx Tx Rc Rc
Analyzer 2
SBC
Analyzer TB6
Tx Tx Rc Rc
RIU
SBC
Feed‐
Through
Board
Tx Tx Rc Rc
Figure 6 - RIU Ethernet Switch