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44 CPU Module labeling and LED indicators
Section 3: Electrical installation Daniel 3818 LNG Liquid Ultrasonic Meter Installation Manual
May 2012 3-9000-771 Rev A
Ethernet communications
The Ethernet port IP address, subnet mask, and gateway address are software-configurable. In
addition, a meter can be configured to act as a DHCP (Dynamic Host Configuration Protocol)
server to assign an IP address to a PC or laptop running Daniel MeterLink. The DHCP server
facility is not intended to act as a general purpose DHCP server for a wider network. To this end,
no user control is provided over the class or range of IP addresses the unit provides. A standard
twisted pair (Cat-5) cable should be used for Ethernet wiring.
It is strongly recommended that the meter be configured using an independent (off-network)
single host. After configuration of the Daniel 3818 LNG Liquid Ultrasonic Flow Meter, the DHCP
option must be turned off if used on a LAN/WAN.
Use ethernet cable (Daniel P/N 3-3400-079) to connect the PC to the meter.
A DIN 41612 48-pin connector is the interface from the CPU Module to the Backplane Board
(male end located on the back of the Backplane Board).
Table 3-3 Ethernet cable to PC communication
Ethernet communication
Wire color CPU
White w/Orange Stripe TX+
Orange w/White Stripe TX -
White w/Green Stripe RX+
Green w/White Stripe RX -
RESTRICT ETHERNET AND SERIAL CONNECTIVITY USAGE
Failure to restrict Ethernet and communication access to the Daniel 3818 LNG Liquid
Ultrasonic Flow Meter can result in, among other things, unauthorized access, system
corruption, and/or data loss.
User is responsible for ensuring that physical access and Ethernet or electronic access to the
Daniel 3818 LNG Liquid Ultrasonic Flow Meter is appropriately controlled and any necessary
security precautions, such as, establishing a firewall, setting password permissions and/or
implementing security levels.
RX+
TX+
TX-
RX-