3M™ Fiber Distribution Unit Rack Mount 8423

3M™ Fiber Distribution Unit Rack Mount 8423
3M™ Fiber Distribution Unit Rack Mount 8423
and Optional 3M™ Port Expander Kit 8423-EXP
Instructions
November 2013
78-8140-6521-1-C
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Table of Contents
1.0 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.0 Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.0 Mounting the Patch Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.0 Field Cable Preparation and Placing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.0 Fiber Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.0 Splicing Using the 3M™ Fiber Splice Organizer Tray 2524-SR . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.0 Pigtail Layout and Splicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.0 Fiber Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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78-8140-6521-1-C
1.0 Description
1.1
The 3M™ Fiber Distribution Unit Rack Mount
8423 is a patch panel designed to provide
termination of up to 24 simplex and up to 48
duplex optical fibers in one unit of rack space.
The panel is mounted on glides that permit
drawer-like movement of the panel within
the rack. The glides have built-in adjustable
stops that allow the installer to select flush
or mid-mounting of the panel in its returned
position. The units offer networking and fiber
distribution from the vault or wiring closet to
the user’s terminal equipment.
The patch panel’s splice or slack storage area
is used for the riser or outside plant cables
entering the building, pigtails and pigtail
splices. This area is enclosed by a detachable
cover.
3M™ Fiber Distribution Unit Rack Mount 8423 and optional
3M™ Port Expander Kit 8423 EXP
The units are sold empty allowing the installer
to customize it using separately purchased
adapter plates. Adapter plates are available
with most common adapter styles including ST,
SC, LC and FC in both multimode and singlemode, simplex and duplex.
Preconfigured units including pigtails and
splice trays are also available.
3M™ Port Expander Kit 8423 EXP
3M also provides field mount connectors of
all types and cable assemblies to complete the
interconnect installation.
Cable clamp........................................................... 1
Cable entry grommet............................................. 1
Machine screw, 8 x 32 x 3/8"................................ 1
Nut, kep 8 x 32...................................................... 1
Large cable retention clips.................................... 4
Small cable retention clips.................................... 4
Plunger................................................................... 2
With the addition of the 3M™ Port Expander
Kit 8423 EXP, the unit can be expanded at any
time to a two-rack unit size for 48 simplex
port or high density 96 duplex port capacity.
2.0 Kit Contents
3M™ Fiber Distribution Unit Rack Mount 8423
Housing unit with cover and glides....................... 1
Cable clamp........................................................... 1
Central strength member clamp............................ 1
Machine screw 8 x 32 x 3/8"................................ 1
Nut, kep 8 x 32...................................................... 1
Fiber retention clips............................................... 9
Jumper organizing clips......................................... 4
Cable entry grommet............................................. 1
Rack mounting screws #10 x 32 x 3/4"................ 4
Spiral tubing.......................................................... 1
Fiber assignment label........................................... 2
Label, danger, laser light....................................... 1
Fiber Assignment Label
Fiber Retention
Clips (9)
Cable Entry
Grommet
Nut,
Cable
Clamp
Rack Mounting
Screws
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Spiral
Tubing
Jumper Organizing
Clips (4)
3
Machine Screw
Central Strength
Member Clamp
2.1 Suggested Tools and Supplies (Not Furnished)
2.2 Optional Parts
3M™ Fiber Splice Organizer Tray 2522 or 2524-SR
3M™ 23" Rack Mounting Bracket Kit 8423-BKT
3M™ Fibrlok™ Splice Inserts 2521-FL
3M™ Fiber Transition Tubing 2520
3M™ Fibrlok™ Splice Inserts 2521-F
3M™ Port Expander Kit 8423-EXP
3M™ Filled Service Wire Cleaning Kit 4415
• Phillips screwdriver
• Cable cutter to cut cable
• Stripping tool to strip loose tube around fibers
• Large cutting pliers for central strength member
• Lint free wipes to apply alcohol
•Reagent grade isopropyl alcohol to clean connectors and couplings
•Solvent and rags to clean waterproof gel from fibers and tubes
•Microscope to view end of fiber when
terminating connectors directly on the fiber
• Splicing kits and supplies
• Cable sheath slitting tool
•Source of dry air (can be obtained in pressurized cans)
•Cable ties to secure field cables and cable assemblies
3.0 Assembly
3.1
Attach the cable clamp:
3.1.1 Remove the cover by releasing the
plungers and sliding the cover forward.
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Note: 3M™ Fiber Distribution Unit Rack Mount 8423
and optional 3M™ Port Expander Kit 8423 EXP - Stack
the expander on top of the 8423 unit and secure with
supplied plastic fasteners.
3.1.2 Slide the cable clamp through the tab to
the left or right of the cable entry
port depending on the direction of
cable entry. Do not engage the clamp’s
threads at this time.
3.2
Attach the strength member clamp:
3.2.1 Use the nut and bolt to attach the strength
member clamp to the patch panel at the
hole opposite the cable clamp. For cables
containing buffer tubes, the strength
member clamp should be installed outside
the panel.
3.2.2 For tight buffered cables, the clamp
should be installed inside of the panel.
Insert the bolt through the strength
member clamp first.
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3.3
Ready the splice chamber.
Install the fiber clips as desired or according to company practice.
3.4
Sketches are provided as guides only. Before installing the fiber clips, consider all organizer trays or
other devices that need to be accommodated.
Direct Termination
Pigtail Splicing
Jumper Organizer Clips
Glide Adjustment Screws
3M™ Fiber Splice Organizer Tray 2522 shown
3.5
Install Labels:
3.6
Install one of the fiber assignment labels on the underside of the housing cover. Install the other fiber
assignment label in a convenient location on the top of the cover.
Install the coupling plates or splitter modules:
Pull the two plungers on the coupling plates
or splitter modules to the outward position.
Fully insert the plate into the panel, then push
both plungers forward to the closed and locked
position.
3.7
Install the jumper organizer rings:
The kit includes four black jumper organizer
rings that are to be installed near the front of
the panel. Two rings should be installed at the
outer edges of the front. The remaining two
rings are to be installed 5.75" in from the edge.
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4.0 Mounting the Patch Panel
4.1
4.2
4.3
The panel is designed to fit a standard 19"
relay rack using one unit of rack space or 1.75
inches. For 23" rack mounting, an additional
3M™ 23" Rack Mounting Kit 8423-BKT is
required.
While supporting the unit in place, loosely
install the four 10-32 Phillips mounting screws.
Slide the unit all the way forward until the
glides hit their stop position. Allow the unit’s
weight to rest on the glides and tighten the
screws. This procedure is necessary to align
the glides for smooth operation.
The unit comes adjusted such that the coupling
plates will be flush with the rack when the unit
is in its returned position. Optionally, the unit
can be recessed in the rack so that the jumper
organizer tray is flush to the rack. Loosen
the internal adjustment screws approximately
1/4 inch. Push the 8423 unit back into the
rack positioning the front edge of the jumper
tray flush to the rack. Tighten the adjustment
screws to retain the unit within the glides.
5.0 Field Cable Preparation and Placement
Note: Leave at least 5' (1.5 m) of field cable slack
outside of the patch panel. In case a fiber is broken
off inadvertently, the slack allows the cable to be
pulled farther into the unit. Slack also allows for
future rearrangements.
5.1
Prepare Cable for Tight Buffered Cables:
5.1.1 Slit and install the oval cable entry
grommet over the end of the cable. Strip
approximately 8' (2.5 m) of the cable’s
outer sheath(s) exposing the 900 µm
buffered fibers. Cut back the central
strength member leaving approximately
4" (10 cm) protruding from the cable’s
outer sheath.
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5.1.2 Installing Tight Buffered Cables:
5.2
Install the grommet in the oval cable port,
then position the cable clamp around
the cable. Insert the central strength
member into the central member clamp
at the same time. The central strength
member will attach to the inside of the
panel for tight buffered cable. Close the
cable clamp onto the cable outer sheath.
Make sure the cable is held in place
securely but not tight enough to compress
the fibers. Tighten the central strength
member clamp screw to retain the central
strength member.
Prepare Cable for Loose Tube Cables:
5.2.1 Slit and install the oval cable entry
grommet over the end of the cable. Strip
approximately 8' (2.5 m) of the cable’s
outer sheath(s) exposing the buffer tubes
and central strength member. Cut back
the central strength member leaving
approximately 6" (15 cm) protruding
from the cable’s outer sheath.
5.2.2 Installing Loose Tube Cables:
Install the grommet in the oval cable port,
then position the cable clamp around
the cable. Insert the central strength
member into the central member clamp
at the same time. The central strength
member will attach to the outside of the
panel for Loose Tube Cables. Close the
cable clamp onto the cable outer sheath.
Make sure the cable is held in place
securely but not tight enough to compress
the fibers. Tighten the central strength
member clamp screw to retain the central
strength member.
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5.3
Secure the cable to the relay rack:
To perform properly, the cable must be secured
to the rack a short distance (about 2' or 0.6
meters) above the unit. The cable must be
routed such that the drawer can glide through
its intended motion without putting undue
stress on the cable. A properly installed cable
will have a bend radius no smaller than 10
cable diameters. When the panel is drawn
forward, the cable will pass above the glide
rails and below any equipment mounted above.
Place the supplied spiral tubing around the
cable jacket to protect the cable from damage.
Cable
Clamp
Spiral Tubing
REAR
VIEW
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6.0 Fiber Layout
Note: Fiber layout is at the discretion of the user
or installer as long as the minimum bending radius
specified by the cable manufacturer is not violated.
Suggested layouts for both the fiber and the pigtails
and direct field termination are shown.
6.1
Direct Termination
If the field fibers are to be directly terminated
using field mountable connectors, follow the
instructions of the connector manufacturer.
6.2
Pigtail Splicing – If the field fibers are to be
spliced to pigtails proceed as follows:
6.2.1 Trim buffer tubes leaving approximately
4" (10 cm) protruding from the cables
sheath.
6.2.2 Cut a 30" (76 cm) piece of 3M™ Fiber
Transition Tubing 2520 and slip over the
250 µm fiber. Repeat for each buffer tube.
6.2.3 Slip the end of the 3M Fiber Transition
Tubing 2520 over the end of the incoming
cable buffer tube.
6.2.4 Temporarily install the 3M™ Fiber Splice
Organizer Tray 2522 in its final location.
Place transportation tubing in the fiber
clips around and into the splice tray.
Follow the instructions supplied with the
splice organizer tray.
3M™ Fiber Splice Organizer Tray 2522 shown
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7.0 Splicing using the 3M™ Fiber Splice Organizer Tray 2524-SR
7.1
Ensure that splice holders are oriented as
shown.
Note: If splice holder inserts are not oriented as
shown remove and reposition as needed.
7.2
Carefully slide protective tubing over exposed
fibers.
7.3
Position protective tubes into tray’s guide slots
at desired location(s).
7.4
Secure protective tubes with supplied cable
ties. Color code per company practice.
7.5
Store fiber slack as mandated by company
practice around the outer race track of splice
tray.
Both holder tabs face
the same direction
Note: Store sufficient slack to allow for multiple
splicing attempts in the event of damage.
7.6
Splice per company practice and install heat
shrink tube.
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7.7
Install fiber splices into insert locations. Each set of inserts can hold up to 12 heat shrink tubes for a
total of 24 splices per tray.
7.7.1 Identify the heat shrink tube locations
closest to the tray surface.
Note: Heat shrink tubes shown without fiber splicing
to improve visibility.
First layer shrink tubes
near tray surface
7.7.2 Once all six lower heat shrink tube
locations are fully populated, the higher
location can be loaded with heat shrink
tubes to fully populate the insert set.
7.7.3 Repeat 7.1 through 7.7 B until 2524-SR
splice tray capacity is reached.
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7.8
If required, trays can be stacked and
interlocked in such a way as to allow for the
trays to hinge.
7.8.1 Break out hinge pins from tray body.
Hinge Pin
7.8.2 Stack trays with hinge locations oriented
as shown.
Align tray hinges
7.8.3 Slide hinge pin into slot as shown to lock
trays in place. Slide pin into slot until it
clicks in place. Repeat on both ends of
tray.
Insert hinge pin
Fully insert pin, click
into place
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7.8.4 Ensure that locking tabs on both front
sides of tray are locked to prevent trays
from hinging open inadvertently.
8.0 Pigtail Layout and Splicing
8.1
Select a Pigtail:
Use a 6'-6" (2 m) pigtail or cut a 13' (4 m)
jumper in half. Put a tag on the pigtail near the
connector indicating the number of the fiber in
the cable it is to be spliced to.
8.2
Trim the Pigtail to the Correct Length:
Holding the connector near the adapter it
will be connected to, route the pigtail in the
vacant clips as per sketch. Cut the pigtail at an
appropriate length to reach the splice point.
3M™ Fiber Splice Organizer Tray 2522 shown
8.3
8.4
Splice the Field Fiber to the Pigtail:
The pigtail end and fiber must be stripped and
cleaned for the splicing operation. Follow the
splicing procedures of the splice manufacturer.
When the splice is completed, route the field
fiber loosely in the fiber clips, and carefully lay
the splice in the slot of the organizer. Route the
pigtail loosely in the fiber clips and insert the
connector as described in step 8.4 below.
Insert the connector of the pigtail into the
connector adapter:
Remove the coupling’s dust caps and clean
the inside with a lint-free swab or pipe cleaner
dampened with isopropyl alcohol. Blow with
dry air, replace right dust cap, then remove the
dust cap from the corresponding connector.
Clean the connector ferrule with a lint free
cloth dampened with isopropyl alcohol. Blow
with dry air. Visually inspect the adapter and
connector for cleanliness. Insert the connector.
Mark the fiber assignment on the internal the
fiber assignment label.
Note: Carefully follow safety, health, and disposal information on container label or Material Safety Data Sheet
for isopropyl alcohol being used.
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8.5
Perform steps 8.1 through 8.4 for all remaining
Fibers and Pigtails then reinstall panel cover.
Pigtail Layout
3M™ Fiber Splice Organizer Tray 2522 shown
Notes:
9.0 Jumper Layout
9.1
9.2
Clean and install the jumper connector into
the appropriate adapter. Dress the jumper fiber
into the black organizing rings to minimize
tight bending stress or tension. Jumpers can
approach the unit from the left or the right side.
Jumpers should be organized on the rack to
provide sufficient slack to allow movement of
the panel in its glides.
Mark the jumper designation on the external
fiber assignment label.
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•
Do not insert connectors into equipment at
either end until the jumper is secured on the
cable racks.
•
Do not remove dust caps from either end of
the cable assemblies until immediately prior to
connection to the equipment.
•
If cable assemblies (jumpers) are to be
pulled through enclosed conduit, use proper
procedures to protect connector ends from
damage and protect the cable from high tensile
loads.
•
It is recommended that cable assemblies be laid
in open raceways where possible.
•
Follow building fire codes when specifying
cable jacket materials for the application
intended.
3M and Fibrlok are trademark of 3M Company.
Important Notice
All statements, technical information, and recommendations related to 3M’s products are based on information believed to be reliable,
but the accuracy or completeness is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for
your intended application. You assume all risks and liability associated with such use. Any statements related to the product which are
not contained in 3M’s current publications, or any contrary statements contained on your purchase order shall have no force or effect
unless expressly agreed upon, in writing, by an authorized officer of 3M.
Warranty; Limited Remedy; Limited Liability.
This product will be free from defects in material and manufacture for a period of one (1) year from the time of purchase. 3M MAKES
NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3M’s
option, to replace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will
not be liable for any indirect, special, incidental or consequential loss or damage arising from this 3M product, regardless of
the legal theory asserted.
3
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6801 River Place Blvd.
Austin, TX 78726-9000
1-800-426-8688
www.3M.com/Telecom
Please Recycle. Printed in USA.
© 3M 2013. All Rights Reserved.
78-8140-6521-1-C
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