Interlogix 2251D - Manual (Page 2)

GENERAL
The GE Security Series 251D single channel contact-closure system transmits switch/status
information or control signals. A system consists of a transmitter (part number 251D-T) and receiver
(part number 251D-R). Throughout these instructions, “251D” may refer generically to all units in this series.
ABOUT THE SYSTEM
The 251D system transmits a single channel of switch/status information or control-function signals, one
way over a single fiber. Utilizing conventional multimode fiber, operating distances of up to two kilometers
and beyond can be obtained, depending on fiber conditions.
Modular units may be installed in a housing, above a ceiling panel, or in any location. Rack mount units
may be installed in a card cage for use in any standard 19-inch rack. Each unit occupies one rack slot.
Modular units may be powered by 13.5 VAC at 300 mA or 12 to 16 VAC at 6 W, or with the 610P AC Adapter
(available from GE Security). Rack mount units are powered from the rack.
OPTICAL INDICATOR
Receivers include a STATUS indicator LED. When lit green, this LED would indicate the data path is complete.
If this LED is off, it indicates that optical power is not being received and would suggest that the fiber is
open or, less likely, the transmitter or receiver is inoperative.
IN CASE OF PROBLEMS
If problems should be encountered, first check to be sure power is properly connected to the modules.
Also verify that the fiber is good. Then, check the transmitter status indicators. If lit, data is present.
If any problems arise, please contact the GE Security customer service department and have the
following information available: exact model number, product code, and serial numbers of your fiber
optic links, and a listing of the diagnostic indicators and their respective color/condition.
251D and 2251D