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Reference, Installation, and Operations Manual Section 3: Installation
3-9000-743 Rev S June 2013
Communication settings 77
To configure Port B 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 B for RS-485 Half Duplex operation, set the switches as indicated in the table
below (see Figure 3-24 for switch bank locations):
Table 3-29 Port B RS-485 full duplex
Board Switch Position
CPU S4-1 RS485
S4-2 RS485
S5-2 FULL
S7-1 RS485
S7-2 RS485
Field Connection Termination On Termination Off
S1-5 TERM ON (RX) TERM OFF (RX)
S1-6 TERM ON (TX) TERM OFF (TX)
S1-7 FULL DUPLX
S1-8 FULL DUPLX
Table 3-30 Port B RS-485 half duplex
Board Switch Position
CPU S4-1 RS485
S4-2 RS485
S5-2 HALF
S7-1 RS485
S7-2 RS485
Field Connection Termination On Termination Off
S1-5 TERM ON TERM OFF
S1-6 TERM OFF TERM OFF
S1-7 HALF DUPLX
S1-8 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.