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The Nexus® 1262/1272 meter may be shipped with connectors on the ends of cables or they
may be shipped as pigtails (no connectors). In this case, a generic terminal block will be
shipped with the meter. The terminal block has up to 12 connectors and can be cut into smaller
sections with a utility knife. Please refer to the Cable Color Key on page 6-4, if you are using
pigtails or if you have any question about which connector is which.
NOTE: R T EXPLANATION
Termination Resistors (R T ) are generally used on both ends of longer length transmission lines.
The value of the Termination Resistors is determined by the electrical parameters of the cable.
Termination Resistors are only needed with runs typically more than 500 feet, as the meter
has some level of termination internally and usually resistors are not needed.
Figure 5.5 shows a representation of an RS485 Daisy Chain connection.
RS485 Master
e
Electro Industries/Gauge Tech
Up to 31 Slaves
Figure 5.5: RS485 Daisy Chain Connection
Doc # E151701
Last Slave
5-5
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