Trane ReliaTel Diagnostic Manual page 17

Figure 7. COMM 3/4 Module for ICS Communication/ LonTalk Communication Interface (LCI/TCI)
Refrigeration
Module
24 VAC
Building
Automation
System (BAS)
RT-SVD03G-EN
COMM 3/4 Module/LCI
Modbus Communication
Must be configured for
COMM3 or COMM4
depending on input
device.
LCI is self-configured.
Address (BIP)
COMM3/4 only
COMM3
COMM4
Receive LED
Transmit LED
Module Flow Diagram
LCI/TCI
Options
Module
or
RTAM (VAV)
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