Chapter 1. Installation
10 DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Startup Guide (1- and 2-Channel)
1.7.4d Wiring the MODBUS/TCP Interface
Customers can also use a modified DF868 that provides a MODBUS/TCP interface to communicate to an internal
network. An optional MODBUS/TCP card with a unique MAC (IP) address (installed only in slots 5 or 6) includes an
RJ45 connector. To connect the MODBUS/TCP-enabled DF868 to the network, insert the jack of an RJ45 cable into
the RJ45 connector, route the cable through the bottom of the DF868, and wire the other end of the cable to the Ethernet
network according to the manufacturer’s instructions.
Note: The MAC address for a specific DF868 is included with customer documentation. For more information on
setting up the MAC address, refer to Chapter 6 of the Programming Manual.
1.7.4e Wiring the Foundation Fieldbus Network
Fieldbus network connections are made at J8/J9, pins 1 and 2 (see Figure 5). Optionally, a shield can be connected to
J8/J9 pin 3, depending on the network wiring. Connector J8 or J9 will be installed depending on the option ordered by
the customer.
No connections are made to J8/J9, pins 7 and 9, under normal operation. If it is desired to reset the network board to
factory defaults:
1. Connect a jumper between J8/J9 pin 7 and pin 9.
2. Power cycle the instrument.
3. Ten seconds after the power has been restored to the unit, remove the jumper to return the network board to normal
operation.
Figure 5: Network Connections - Standard Option Interior
1
9
J8
1
9
J9
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