Specifications

8
Reference Manual
00809-0100-2460, Rev AA
Section 2: Overview
November 2014
Overview
2.1.1 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 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.
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 2460 System Hub connected to a Rosemount 2410
and a PC/Host
(1) See “Cabling for the TRL2/RS485 Bus” on page 28 for information on cable requirements.
Modem
TankMaster
2460 System Hub
RS232
RS485
Ethernet
USB
RS232
TRL2, RS485
Field devices
2410 Tank Hub
Tankbus
DCS/Host
(TRL2, RS485, RS232)
Secondary bus:
Enraf
HART 4-20 mA
Analog output/input
Field devices
TRL2, RS485
Primary bus: TRL2, RS485