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Rosemount Tank Radar REX
Chapter 7 Bus Modems
Installation Manual
308014EN, Edition 4
May 2013
7. Bus Modems
Emerson Process Management/Rosemount Tank Gauging supplies two
types of modems (for technical details, please see chapter 14):
Field Bus Modem 2180: converts between USB or RS 232C and the
TRL/2 Bus. The TRL/2 protocol is used for communication with
Rosemount Tank Gauging equipment.
Figure 7-1. Field Bus Modem 2180
Enraf Bus Modem: converts between RS 232C and TRL/2 Bus or
RS 232C and Enraf GPU communication protocol.
Figure 7-2. Enraf Bus Modem
FBM2180_USB_Top_RosemounTG.eps
Modemb.eps