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Reference, Installation, and Operations Manual Section 3: Installation
3-9000-743 Rev S June 2013
Communication settings 75
To configure Port A for RS-485 Full Duplex operation, set the switches as indicated in the table
below (see Figure 3-24 for switch bank locations):
To configure Port A for RS-485 Half Duplex operation, set the switches as indicated in the table
below (see Figure 3-24 for switch bank locations):
Table 3-26 Port A RS-485 full duplex settings
Board Switch Position
CPU S3-1 RS485
S3-2 RS485
S3-3 RS485
S3-4 RS485
S5-1 FULL
S6-1 RS485
S6-2 RS485
Field Connection Termination ON Termination OFF
S1-1 TERM ON (RX) TERM OFF (RX)
S1-2 TERM ON (TX) TERM OFF (TX)
S1-3 FULL DUPLX
S1-4 FULL DUPLX
Table 3-27 Port A RS-485 half duplex settings
Board Switch Position
CPU S3-1 RS485
S3-2 RS485
S3-3 RS485
S3-4 RS485
S5-1 HALF
S6-1 RS485
S6-2 RS485
Field Connection Termination ON Termination OFF
S1-1 TERM ON TERM OFF
S1-2 TERM OFF TERM OFF
S1-3 HALF DUPLX
S1-4 HALF DUPLX
Termination should only be enabled if the meter is the last drop in a multi-drop
configuration or the only meter in a single-drop configuration.