FLD-496SA
4
A00474-1A
continuously transmitting and hogging the
fiber. If a controller tries to transmit for
more than 7 seconds, the local is shut
down. When the Local Controllers starts
operating correctly and drops RTS, the
Anti-streaming circuit will automatically
reset. Anti-streaming is normally not used
in the Master Mode because the Master
can be transmitting for long periods of
time.
SPECIFICATIONS
Power ................... 90-135 VAC 50-60Hz
< 2 Watts
Temperature ....... ..-37° to +74° C
Humidity ............ 5- 95% non-condensing
Fiber Interface ...... ST Type Connectors
(FC Optional on 1300nm)
850nm Multi-mode Fiber
1300nm Single-mode
Fiber
FSK SECTION
Mark Frequency ....... 11,200 Hz
Space Frequency ...... 17,600 Hz,
Output Level
-8 to 0 dBm
Adjustable by Pot.
Receiver sensitivity ............ -40 dBm
Line Impedance ............... .600 Ohms
Modulation ............... Phase coherent FSK
Data Rate ....... 9600 bps (Max.)
Physical Size.....5.75"W x 8.6"D x
1.6"H
FIBER SECTION
850 nm (62.5/125 cable)
Emitter output............ .-7 to –16 dBm
Receiver sensitivity.....-40 dBm max
Power budget ................. 15 dBm Typ.
1300 nm (8.3 Cable)
Emitter output.......... -21 to –13 dBm
Receiver sensitivity ...... -33dBm
Power Budget .............. .12 to 20 dBm
INSTALLATION
The FLD-496SA is very easy to use and
install in a system. The only connector on
the rear panel is the FSK connector. The 4
pins of the connector are labeled for
function in a 4 wire system. For a 2 wire
system use the "Out" pins 3 and 4.
The switches are labeled on the rear
panel. For full duplex operation, the
"FULL" switch should be on and "HALF"
and "ECHO" switches should be OFF. For
Half duplex operation, "FULL" s h o u l d
b e O F F a n d " H A L F " a n d "ECHO"
should be on. The "ECHO" switch
squelches the receiver when transmitting.
"MAST" "RMTE" switch selects Master
or Remote operation as described earlier.
The "MAST" position is usually used for
the central computer that controls or
interrogates the Local controllers. If you
have a point to point system, all of the
Modems can be set in the "MAST"
position.
