Emerson Rosemount 3410 Series Installation Manual page 52

Electrical installation
October 2023
2. Leave the Telnet port disabled. This port is not required for any communications to
3. Enabling the physical Write Protect switch will prevent metrology configuration
4. Disable unused protocols or set them to read-only if write capability is not required.
5. Rosemount 3410 Series Firmware v1.60 and later require user authentication and
6. Other users can be added with different privileges and passwords in the Rosemount
This transmitter:
1. Is not intended to be directly connected to an enterprise or to an internet facing-
2. Must be installed following industry best practices for cybersecurity.
Modbus TCP
If the meter firmware supports Modbus TCP slave functionality, the following controls will
be available.
Modbus TCP unit identifier: Enter the Modbus TCP unit identifier here. Valid values are
0-255.
Enable alternate Modbus TCP port: The standard TCP port for Modbus TCP is port 502. This
port is always enabled in a meter that supports Modbus TCP. By selecting this option,
you can also enable Modbus TCP communications on a secondary TCP port specified by
Alternate Modbus TCP port.
Alternate Modbus TCP port: Enter the alternate TCP port number here after selecting Enable
alternate modbus TCP port. Valid port numbers are from 1 to 65535. The meter will not
allow some port numbers that are either used by the meter or are defined port numbers
for other protocols. MeterLink
number to the meter.
Serial connections
Use a serial cable, Rosemount
The cable is designed for RS-232 communications which is the serial Port A default
configuration (see
Drawing DMC-005324). The DB-9 end of the cable plugs directly into the PC running
MeterLink. The three wires on the other end of the cable connect to the CPU Module
RS-485/RS-232 terminals. The RED wire goes to RX, the WHITE wire goes to TX, and the
52
the HTTP protocol enabled using the Meter → Communications Settings dialog in
MeterLink . Both can be disabled for additional security, but log collection will not
™
be possible in this configuration.
field devices or MeterLink. Beginning with Rosemount 3410 Series Firmware v1.60,
Telnet is permanently disabled.
changes and firmware upgrades. It will also prevent enabling TCP/IP protocols such
as FTP, HTTP, and Telnet.
The Modbus TCP/IP protocol can be set to Read-only or Disabled on the Ethernet
port. Modbus protocols can be disabled or made read-only on serial ports while still
allowing authenticated MeterLink communications.
has a default administrator password. While the password is unique to each meter,
it is highly recommended to be changed at meter startup. For added security, the
default username, administrator, can be changed as well.
3410 Series Firmware v1.60 and later. Only give users privileges to perform their
job functions. For more information, see
delete users.
network without a compensating control in place.
™
™
3410 Series engineering drawings
Manage users
will prompt you if it was not able to write the specified port
P/N 3-2500-401, to connect to a PC running MeterLink.
field wiring diagram, Rosemount
Installation manual
00825-0600-3104
on how to add, change, and
Gas Ultrasonic Flow Meters