DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Startup Guide (1- and 2-Channel) 9
Chapter 1. Installation
1.7.4b Wiring the RS485 Interface (cont.)
3. Feed one end of the cable through the conduit hole, wire it to terminal block J1 and secure the cable clamp.
Connect the other end of the cable to the converter, as shown in Figure 4.
Figure 4: Typical RS485 Connections
1.7.4c Wiring the Ethernet Interface
A modified DF868 can use the Ethernet interface to communicate to an internal network. An optional Ethernet card
with a unique MAC (IP) address (installed only in slots 5 or 6) includes an RJ45 connector. To connect the
Ethernet-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. An external connection is required between the Ethernet option card and the DF868’s
RS232 connector, as shown in Table 2.
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.
Table 2: RS232 to Ethernet Interconnections
DF868 Type Terminal Block Terminal Block
RS232 on
Main Board
TB1 on
Ethernet Card
Wall Mount TX Pin 1
RX Pin 2
RTN Pin 3
RS232 on
Main Board
TB2 on
Ethernet Card
Rack Mount TX Pin 1
RX Pin 2
RTN Pin 3
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