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Daniel 3818 LNG Liquid Ultrasonic Meter Installation Manual
Section 3: Electrical installation
3-9000-771 Rev A
May 2012
Wiring and I/O
41
3.5
Wiring and I/O
Daniel MeterLink uses the TCP/IP protocol to communicate with the 3818 LNG Liquid Ultrasonic
Flow Meter electronics 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. The meter
electronics is HART capable and provides communication flexibility with Daniel 3818 LNG Liquid
Ultrasonic Flow Meters.
Flow Meter electronics 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. The meter
electronics is HART capable and provides communication flexibility with Daniel 3818 LNG Liquid
Ultrasonic Flow Meters.
The HART® output provides communication with other field devices (e.g., Field Communicator
and AMS™ Device Manager software) and ultimately, communicates key diagnostic information
through PlantWeb® architecture.
and AMS™ Device Manager software) and ultimately, communicates key diagnostic information
through PlantWeb® architecture.
The Daniel 3818 LNG Liquid Ultrasonic Flow Meter has two 3814 electronics enclosures and
auto-detects the protocol used and automatically switches between TCP/IP, Modbus ASCII, and
Modbus RTU so it is not necessary to make any meter configuration changes to change the
protocol.
auto-detects the protocol used and automatically switches between TCP/IP, Modbus ASCII, and
Modbus RTU so it is not necessary to make any meter configuration changes to change the
protocol.
Two sets of transmitter electronics (co-located) are provided with the Daniel 3818 LNG Liquid
Ultrasonic Flow Meter. The Primary (master) electronics are in the upstream enclosure with the
serial tag marked _H1. The Secondary (slave) electronics are in the downstream enclosure with
the serial tag marked _H2.
Ultrasonic Flow Meter. The Primary (master) electronics are in the upstream enclosure with the
serial tag marked _H1. The Secondary (slave) electronics are in the downstream enclosure with
the serial tag marked _H2.
If not using Ethernet, a full duplex serial connection is necessary for Daniel MeterLink to
communicate with a Daniel 3818 Liquid Ultrasonic Meter.
communicate with a Daniel 3818 Liquid Ultrasonic Meter.
Note:
Daniel recommends running conduit and field wiring to each of the co-located Transmitter
Electronics Enclosures and wiring each of the meters.
Electronics Enclosures and wiring each of the meters.