RFL Electronics 9780 - Features

RFL 9780 RFL Electronics Inc.
April 8, 2003 2-5 (973) 334-3100
2.4 FEATURES
Programmability
The transmit frequencies (low and high for 2F operation, or low, center, and high for 3F operation)
can be set over a range of 30Hz to 535kHz, adjustable in 10-Hz steps. The receiver frequency range
is 30 to 535kHz, adjustable in 250Hz steps.
Wide Output Range
The transmitter output power level can be up to 10 watts in a single chassis. Higher output powers
are available with external amplifiers.
Saves Rack Mounting Space
Each RFL 9780 terminal is housed in a single chassis three rack-units high (5.25 inches, or 133mm).
Conserves Frequency Spectrum
When configured as a dual-function 3F system, the RFL 9780 provides two relaying channels in
less bandwidth than that’s needed for two separate channels. Only one transmitter is required,
reducing equipment costs. Besides providing better utilization of the carrier frequency spectrum,
reliability is improved because less equipment is used.
Station Battery Isolation
A dc-dc converter supplies regulated voltage to all RFL 9780 modules. All inputs and outputs are
made through optically-isolated transistors or electromechanical relays.
Flexible Trip Outputs
Trip outputs can be made through optically-isolated, high-current transistors, output relays, or both.
An ABB RXMS-1 Series, ABB AR Series, or GEC GPR101 Series relay can also be supplied,
mounted and wired inside an expansion chassis.
Compatibility With Existing Equipment
The RFL 9780 is backwards compatible with existing RFL 6780 and 6780P units presently in the
field, and can communicate with virtually any other PLC equipment in the field.
Carrier Level Indicator
The RFL 9780 continuously monitors incoming carrier level with a digital panel meter providing a
visual indication through the front panel. The contacts of an alarm relay will change state if the
carrier level falls below a preset limit.
Manual Test Panel Option
A manual test panel can be supplied to allow the operator to manually test the continuity of the
communications channel up to the trip output relay. This optional panel mounts inside an expansion
chassis.
Reflected Power Meter
A built-in set of modules can automatically measure the amount of transmitted power reflected back
to the local receiver. The reflected power can be read locally or remotely using RFL Web
Commander or Hyper-terminal.