Specifications

29
Reference Manual
00809-0100-2460, Rev AA
Section 3: Installation
November 2014
Installation
3.5.6 Connecting the 2460 System Hub
Connection to a Host
The 2460 System Hub can be connected to TankMaster or other host computer via a Rosemount
2180 Field Bus Modem (FBM). The 2460 also supports the RS232 and RS485 interfaces for
connecting to a host. The Ethernet interface can be used to connect the 2460 to a service PC.
The TRL2 Bus requires a twisted and shielded pair with a cross-sectional area of 0.50 to 2.5 mm
2
(AWG 20 to 14).
For RS232 communication, wiring cross-sectional area must be at least 0.25 mm
2
(AWG 24 or
similar). The maximum length of the RS232 connection is 30 m at baude rate 4800 .
Table 3-3. Data rate and mximum distances for RS232 communication
Communication Ports
The 2460 System Hub has eight slots for communication interface boards. It is equipped with
interface boards for field device communication and host communication. The specific
configuration is specified in the ordering information.
Port 8 is used for TankMaster communication. Port 7 is used for host or TankMaster
communication as specified in the ordering information.
Port1 to Port 4 are used for field device communication.
Ports 5 and 6 can be used for host or field device communication as specified in the ordering
information. This allows you to vary the number of field and host ports depending on the
specific requirements.
Table 3-4 below shows various configuration options for a 2460 System Hub.
Table 3-4. Port configuration options
Baude rate (bps) Distance (m)
2400 60
4800 30
9600 15
19200 7.6
Ports 1 2 3 4 5 6 7 8
Alternative 6+2
Field
Port
Field
Port
Field
Port
Field
Port
Field
Port
Field
Port
Host
Port
Host
Port
Alternative 5+3
Field
Port
Field
Port
Field
Port
Field
Port
Field
Port
Host
Port
Host
Port
Host
Port
Alternative 4+4
Field
Port
Field
Port
Field
Port
Field
Port
Host
Port
Host
Port
Host
Port
Host
Port