GE DigitalFlow DF868 Programming Manual page 128

March 2008
Reconfiguring a Serial
Interface Converter (cont.)
Wiring the System
6-6
Screwdriver
DB9 Connector
Figure 6-2: Opening the Converter Case
Table 6-2: Switch Assembly Settings
Position #
1
2
3
4
7. Reassemble the serial interface converter and secure it to the
mounting bracket with the two mounting screws.
8. Reinstall the mounting bracket into the electronics enclosure and
secure it with the standoff and the grounding screw.
After the serial interface converters have been configured for multi-
point operation, the system can be wired.
1. Using twisted-wire pairs, connect the XMT+ terminals of all the
flowmeters together and connect the XMT– terminals of all the
flowmeters together.
IMPORTANT:
Make sure that the flowmeter with the non-modified
converter is wired as the last unit in the chain.
2. Using a twisted-wire pair, connect the XMT+ terminal of the
barrier strip to the T+/R+ terminal of the PC's RS485 adapter and
connect the XMT– terminal of the barrier strip to the T-/R-
terminal of the PC's RS485 adapter (see the documentation
provided with the RS485 adapter for details).
Plastic Case
Mounting Screw
Point-To-Point
ON
ON
ON
OFF
Serial Communications
Multi-Point
OFF
ON
ON
OFF