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60 Wiring and Connections
Section 3: Installation Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
3.4 Wiring and Connections
Daniel MeterLink uses the TCP/IP protocol to communicate to the Daniel 3400 Series Gas
Ultrasonic Flow Meter instead of Modbus ASCII or RTU. The TCP/IP protocol only works across
either Ethernet, RS-485 full duplex (i.e., 4-wire), or RS-232. Daniel MeterLink can communicate
with multiple meters if they are multi-dropped using 4-wire full duplex RS-485 mode. When
installed, the Series 100 Plus Option Board provides communication flexibility with Daniel 3400
Series Gas Ultrasonic Flow Meters, enables the meter to easily communicate with other field
devices Field Communicator (375) and AMS™ Suite), and ultimately communicate key
diagnostic information through PlantWeb® architecture.
The Daniel 3400 Series Gas Ultrasonic Flow Meter can auto-detect the protocol used and
automatically switch between TCP/IP, Modbus ASCII, and Modbus RTU so it is not necessary to
make any meter configuration changes to change the protocol.
Use serial cable (Daniel P/N 3-2500-401) to connect to a PC running Daniel MeterLink. The cable
is designed for RS-232 communications which is the serial Port B default configuration (see
Appendix I field wiring diagram, Daniel Drawing DE-21056). The DB-9 end of the cable plugs
directly into the PC running Daniel MeterLink. The three wires on the other end of the cable
connect to the Field Connection Board at connector J7 (see Table 3-7 for Port B wiring).
Table 3-7 J7 Port B Wiring
Power and Communications Field Connection Board Wiring
PC Connector Field Connection Board
DB-9 cable J7 Port B Wiring
• Red - J7-Pin 1
• White - J7-Pin 2
• Black - J7-Pin 3
Daniel MeterLink cannot communicate with Daniel 3400 Series Gas Ultrasonic Flow Meter
over RS-485 half duplex (i.e., 2-wire).