RFL 9780 RFL Electronics Inc.
March 10, 2000 3-7 (973) 334-3100
3.5.8 CHASSIS GROUND CONNECTIONS
A threaded ground stud at the rear lower right of the RFL 9780 chassis is the main ground for the RFL
9780 terminal. Grounding is accomplished by connecting a wire 6AWG or larger between the ground
stud and rack ground. The grounding wire should be kept as short and straight as possible, to keep its
resistance and inductance to a minimum.
Before attempting to make power connections, make sure the RFL 9780 terminal is equipped with a
power supply designed to operate at the available input supply voltage. This can be determined by
checking the model designator on the module handle. If an external power supply is being used, check
the markings on the external power supply. If the wrong voltage is connected to the power supply,
component damage will result.
3.5.9 POWER CONNECTIONS
After all other connections have been made to the RFL 9780, power connections can be made. The
terminal battery voltage is connected to terminal block TB10, positive to TB10-1, and negative to
TB10-2. Depending on the power supply installed in the terminal, 48-volt, 125-volt or 250-volt
terminal batteries can be accommodated.
A switched station battery output is also available on terminal block TB10, positive at TB10-3, and
negative to TB10-4. This output can be used to shut down external equipment in the event that the RFL
9780 is shut down for any reason.
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