User's Manual
Models CH45
EIA 422 or 485
3-6
HD/FD Jumpers in FD Position
HD/FD Jumpers in HD Position
Simplex
Half
Duplex
Full
Duplex
Simplex
Half
Duplex
Full
Duplex
Point-to-Point:
(Mode Jumpers "OFF")
X
X
X
X
X
Master/Save Loop:
Master (Mode Jumpers "OFF")
X
X
X
X
X
Master/Slave Loop:
Slave (Mode Jumpers "REP")
X
X
X
X
3.10 SELECTION OF FIBER OPTIC CABLE (FOC)
Fiber optical cable is available in several construction types; simplex, duplex, and breakout. FOC is also
available in various diameters and tensile strengths.
Simplex FOC is desirable for loop operations. It has one optical conductor and can be connected from
the transmitter of one Link/Repeater to the receiver of the next Link/Repeater in the loop.
Duplex FOC has two optical conductors and is a convenient form when connecting two units Point-to-
Point.
Breakout cable is a multiple strand FOC that has extra strength members added and is suitable for burial
and pulling in conduit. Breakout cable may be ordered with multiple pairs of fiber. For extreme conditions,
it is also available with an armor jacket.
Tensile strength is important for longer life expectancy.
The following are the specifications of multi-mode FOC offered by DYMEC-DynaStar and are the rec-
ommended minimum standards for optimum performance.
Simplex
Duplex Breakout
Fiber Count 1 2 2
Fiber Material Glass Glass Glass
Diameter [mm] 3.0 3.0 x 6.5 7.0
Weight [kg/km] 8.0 16.0 50
Tensile load- Short Term [N] 500 1000 1200
Tensile load- Long Term [N] 300 500 500
Minimum Bend Radius-With Load [cm] 5 5 14
Minimum Bend Radius-No Load [cm] 3 3 7
Crush Resistance [N/cm] 750 750 2200
Impact Resistance [Cycles] 1000 1000 2500
Flex Resistance [Cycles] 7500 7500 2000
Operating Temperature [
o
C] -40
o
to +85
o
-40
o
to +85
o
-40
o
to +85
o
Storage Temperature [
o
C] -55
o
to +85
o
-55
o
to +85
o
-55
o
to +85
o
METRIC-TO-ENGLISH UNIT CONVERSIONS
MULTIPLY
BY
MULTIPLY
BY
Millimeters
→
→→
→
Inches 0.03937 Kilograms
→
→→
→
Pounds 2.2046
Centimeters
→
→→
→
Inches 0.3937 Kg/Km
→
→→
→
Pounds/1,000 Ft 0.67197
Meters
→
→→
→
Feet 3.2808 Newtons
→
→→
→
Pounds 0.22481
Kilometers
→
→→
→
Feet 3280.8 N/Cm
→
→→
→
Pounds/inch 0.57101
Kilometers
→
→→
→
Miles 0.62137