Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
2.1 PURPOSE OF THIS MANUAL
This manual provides operation and maintenance information for the RFL 9785 Programmable
ON/OFF Powerline Carrier System. Included are an overall functional description of its purpose, a
physical description, specifications, installation instructions, operating procedures, maintenance
procedures, theory of operation, and parts information for all circuit card modules. A typical RFL 9785
terminal is shown in Figure 2-1.
WARNING
MANY OF THE CIRCUITS IN THE RFL 9785 ARE FACTORY TUNED ACTIVE
CIRCUITS. NONE OF THE PARTS IN THESE CIRCUITS ARE FIELD
REPLACEABLE. UNAUTHORIZED MODIFICATIONS OR ALTERATIONS TO
THESE CIRCUITS WILL COMPROMISE SYSTEM PERFORMANCE.
2.2 PURPOSE OF EQUIPMENT
The RFL 9785 is an amplitude modulated ON/OFF powerline carrier transmitting and receiving
terminal. It is an enhanced version of the field-proven technology used in the RFL 6785P. The RFL
9785 offers fully programmable timers, simplifies the setup process and fully complies with
ANSI/IEEE C93.5-1997.
The RFL 9785 was designed for directional comparison blocking applications in high-speed protective
relaying communications. It exhibits a high degree of dependability and maintains relatively high
security.
RFL 9785 RFL Electronics Inc.
June 18, 2009
2-2 (973) 334-3100
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