Emerson Rosemount 2460 System Hub - 2.2 Communication

8
Reference Manual
00809-0100-2460, Rev DE
Overview
October 2018
Overview
2.2 Communication
The Rosemount Tank Gauging system supports various communication interfaces between field devices
and a TankMaster PC or other host computer as illustrated in Figure 2-2.
The Rosemount 2460 System Hub collects measurement data from field devices and transmits the data
to a host system. It also handles communication from a host to the field devices.
The Rosemount 2460 supports a number of communication interface standards. For host
communication, the TRL2, RS485, and RS232 are supported. TRL2 and RS485 are supported for field
device communication also, as well as other standards such as Enraf and Digital Current Loop (Whessoe).
The Rosemount 2410 Tank Hub has a Primary bus and a Secondary bus that can be used for TRL2 Modbus
(standard) or RS485 Modbus communication
(1)
. The Secondary bus supports other communication
protocols as well, such as Enraf, Varec etc.
Figure 2-2. Typical configuration of a Rosemount 2460 System Hub connected to a Rosemount
2410 Tank Hub and a PC/Host
1. See “Cabling for the TRL2/RS485 bus” on page 29 for information on cable requirements.
Modem
Rosemount
Ta nk Master
RS232
RS485
Ethernet
USB
RS232
TRL2, RS485
Field devices
Ta nk b us
DCS/Host
(TRL2, RS485, RS232)
Secondary bus:
Enraf
HART 4-20 mA
Analog output/input
Field devices
TRL2, RS485
Primary bus: TRL2, RS485
Field devices:
Enraf
Whessoe
Varec
L&J
GPE
Rosemount 2410 Tank Hub
Rosemount 2460 System Hub