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Communications setup
Section 5: Startup and meter configuration
 Reference, Installation, and Operations Manual
June 2013
3-9000-743 Rev S
5.2
Communications setup
The Daniel 3410 Series Gas Ultrasonic Flow Meter provides three standard RS-232/RS-485 serial 
communication ports (referred to respectively as Port A, Port B, and Port C) and an Ethernet 
port (Eth1). Port A and Port B are expected to be used for (general) communication with flow 
computers and RTUs. Port C (included on the Series 100 Plus Option Board) can be used for 
general communication (such as with a flow computer or RTU). The Series 100 Plus Option 
Board, if installed is capable of communicating with other devices via a 375 Field Communicator 
or AMS™ Suite.
The Ethernet port is expected to be used for diagnostic purposes. 
 for hardware 
configuration of communications protocols. 
 for software configuration of 
communications protocols.
Port A is the preferred port for connection to a flow computer or RTU. If two flow computers are 
to be connected to the meter, then Port B should be used to connect to the second flow 
computer. If a computer running the Daniel MeterLink program is to be connected to a meter 
the Ethernet port is the preferred port for the connection. 
If the Ethernet connection is not feasible, then Daniel MeterLink should be connected to the 
meter using Port B in full duplex configuration. 
Both Ports A and B are individually hardware-selectable for RS-232/RS-485 Full Duplex/RS-485 
Half Duplex operation. Port A supports RS-232 RTS/CTS handshaking with software-
configurable RTS on and off delay times. When handshaking is enabled, Port A drives the RTS 
output low and expects the CTS input to be active low. Both Ports A and B support individually 
software-configurable transmit delay times.
Port C (provided by the Series 100 Plus Option Board) is individually hardware-selectable for 
RS-232/RS-485 Half Duplex operation. Port C supports a software-configurable transmit delay 
time. 
Refer to Daniel P/N 3-9000-754 HART® Field Device Specification Guide: Daniel Gas Ultrasonic 
Meters manual for Series 100 Plus Option Board details.
Daniel MeterLink will not communicate with a Daniel 3410 Series Gas Ultrasonic Flow Meter 
over a half-duplex serial connection.