CommScope EHD User manual

660001735 Rev B Page 1
www.commscope.com © 2019 CommScope. All Rights Reserved.
User Manual
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Trademark Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Admonishments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
General Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1 PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3 Comparative View of 1RU, 2RU, and 4RU Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .4
1.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.5 Transportation and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2 UNPACKING AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3 PANEL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.2 Mounting the Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
(continued)
Content Page
26417-A
TECP-91-008
Rev C, January 2019
Enhanced High Density (EHD) Panel

TECP-91-008 • Rev C • January 2019
Page 2
© 2019 CommScope. All Rights Reserved.
3.3 Grounding the Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . 11
4.1 Loading Adapter Packs or Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Accessing Connectors on Back of Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Closing Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Removing Blade from Front (if Required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5 Installing Trunk Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . 22
5.1 Channel Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 22
5.2 Cabinet Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3 UMB Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6 CONNECTING AND ROUTING PATCH CORDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7 CONTACT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 26
INTRODUCTION
This user manual describes the Enhanced High density (EHD) Panel. Included in this
user manual are all procedures required in installing the EHD Panel as well as
operation procedures.
Revision History
Trademark Information
CommScope (logo), CommScope, and Enhanced High Density Panel are trademarks .
Applicable Standards
UL 60950-1, 2nd Edition, 2007-03-27 (Information Technology Equipment - Safety -
Part 1: General Requirements
CSA C22.2 No. 60950-1-07, 2nd Edition, 2007-03 (Information Technology Equipment
-Safety - Part 1: General Requirements)
Admonishments
Important safety admonishments are used throughout this manual to warn of possible
hazards to persons or equipment. An admonishment identifies a possible hazard and
then explains what may happen if the hazard is not avoided. The admonishments — in
the form of Dangers, Warnings, and Cautions — must be followed at all times.
Content Page
REV DATEREASON FOR CHANGE
Rev C January 2019 Added new information on shipment (product stacking).

TECP-91-008 • Rev C • January 2019
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© 2019 CommScope. All Rights Reserved.
General Safety Precautions
1 PRODUCT DESCRIPTION
1.1 General Description
The Enhanced High density (EHD) Panel is a fiber optic connector panel intended for
use in large data centers in a direct connect or interconnect environment. The EHD
Panel mounts in a 19-inch (48.26 cm) or 23-inch (58.42 cm) equipment rack with a 3-
inch or 6-inch channel. The EHD Panel will also mount in 19-inch or 23-inch cabinet.
The EHD Panel is available in 1RU, 2RU, or 4RU size. In each 1RU of rack space, a
fully loaded panel provides 144 LC (72 Duplex) terminations and/or 72 MPO ports. The
panel features slide out blades (three per 1.75 inches (4.44 cm) of rack space)
accessible from front or rear and providing full hand access to adapters and
connectors. Each blade can accommodate two adapter packs or modules.
1.2 Major Components
Figure 2 shows the main components of the EHD Panel. They are as follows:
•Blade—holds two LC-MPO modules or two MPO adapter packs; slides out toward
front or rear of the panel. There are three blades per 1RU of rack space. The
blade has a first and second position. The first position is used to plug in
connectors to the front of an adapter pack or module. The second position (further
removed from the front of the panel) is used install adapter packs and modules,
and for access to clean the rear connectors when using adapter packs.
Danger: Danger is used to indicate the presence of a hazard that will cause severe personal
injury, death, or substantial property damage if the hazard is not avoided.
Warning: Warning is used to indicate the presence of a hazard that can cause severe personal
injury, death, or substantial property damage if the hazard is not avoided.
Caution: Caution is used to indicate the presence of a hazard that will or can cause minor
personal injury or property damage if the hazard is not avoided.
Caution: When mounting equipment in the rack make sure mechanical loading is even to avoid
a hazardous condition, such as loading heavy equipment in the rack unevenly. The rack should
safely support the combined weight of all equipment it supports.
Caution: This equipment is to be installed only in Restricted Access Areas (dedicated
equipment rooms, equipment closets, etc.).
Note: In this figure, the 2RU panel is shown. Main components are analogous for
other RU sizes. For comparative views of the three panel sizes, refer to Section
1.3 on Page 4.

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© 2019 CommScope. All Rights Reserved.
Figure 1. EHD Panel Main Components (2U Model Shown)
•Rear Cover—can be removed to allow a blade to be removed from the rear of the
panel. It is also removed to route in and secure fiber cables on the rear of the
panel.
•Grounding Location—is where a two-hole lug (not provided) and ground wire
are attached to connect the panel ground PEM nuts to office ground. The two-hole
lug to be used requires a spacing between holes of 0.625 inch (1.59 cm).
•Mounting Brackets—can be flipped around to provide either front- or rear-facing
mounting on a channel rack. The mounting brackets can be mounted with a
recess of either 3 inches (7.62 cm) or 6 inches (15.24 cm).
•Front Door—swings down to provide access to the interior of the panel. The door
features a double-hinged design that allows users to open the door without
interfering with equipment below the panel on the same rack, or to move the door
into its lower position allowing the lowest blade to open freely.
•Designation Label—provides physical space for recording fiber designations.
1.3 Comparative View of 1RU, 2RU, and 4RU Panel
The figures below provide comparative views of the different sizes of the EHD Panel,
as follows: 1RU panel (Figure 2); 2RU panel (Figure 3); 4RU panel, front view
(Figure 4); 4RU panel, rear view (Figure 5). Figure 6 shows the rear of the 4RU panel
with rear cover removed. The 4RU panel has a removable mid-shelf, also shown in
Figure 6.
26418-A
MOUNTING
BRACKET (2X)
BLADE
(PARTLY REMOVED
FROM CHASSIS)
DESIGNATION LABEL FRONT
DOOR
GROUNDING
LOCATION
REAR
COVER

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Figure 2. EHD 1RU Panel
Figure 3. EHD 2RU Panel
Figure 4. EHD 4RU Panel

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Figure 5. EHD 4RU Panel, Rear View
Figure 6. EHD 4RU Panel, Rear View, Rear Cover Removed
1.4 Specifications
Table 1 lists specifications for the EHD Panel.
Note: The 4RU panel comes with a rear midshelf, shown in Figure 6. This
midshelf can be removed for easier access to the bottom blades when cabling or
for high count cables that will be terminated on both lower and upper blades. The
midshelf should be used when many trunks are terminated in the panel. The
midshelf prevents the weight of the trunks terminated on the top blades from
weighing down on the trunks terminated at the bottom of the panel thus impeding
their movement.
26426-A
MIDSHELF
TO REMOVE THE MIDSHELF,
REMOVE THESETWO SCREWS

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© 2019 CommScope. All Rights Reserved.
*between mounting holes
1.5 Transportation and Storage
Products packaged in cartons may be stacked two high in transportation and storage.
Some products packaged in spools may be stacked two high in transportation and
storage. See product packaging labels for designation.
2 UNPACKING AND INSPECTION
1. Inspect the exterior of the shipping container(s) for evidence of rough handling
that may have damaged the components in the container.
2. Unpack each container while carefully checking the contents for damage and
verify with the packing slip.
3. If damage is found or parts are missing, file a claim with the commercial carrier
and notify CommScope Customer Service. Save the damaged cartons for
inspection by the carrier.
4. Refer to Section 7 on Page 26 if you need to contact CommScope.
Table 1. EHD Panel Specifications
PARAMETER SPECIFICATION REMARKS
Operating conditions −14°F to +140°F (−10°C to +60C)
Humidity 10% to 95% RH No condensation
Storage conditions −40°F to +158°F (−40°C to +70°C)
Panel Dimensions and Weight
1RU panel Dimensions:
21.17 in. (53.76 cm) D
x 17.24 in. (43.78 cm) W
x 1.72 in. (4.37 cm) H
Weight without packaging:
14.0 lb. (6.4 Kg);
Weight with packaging:
19.5 lb. (8.9 Kg)
2 RU panel Dimensions:
21.17 in. (53.76 cm) D
x 17.24 in. (43.78 cm) W
x 3.44 in. (8.74 cm) H
Weight without packaging:
19.4 lb. (8.8 Kg);
Weight with packaging:
25.6 lb. (11.6 Kg)
4 RU panel Dimensions:
21.17 in. (53.76 cm) D
x 17.24 in. (43.78 cm) W
x 6.94 in. (17.63 cm) H
Weight without packaging:
32.4 lb. (14.7 Kg);
Weight with packaging:
42.0 lb. (19.1 Kg)
All panel Width with 19-inch brackets* 18.31 in. (46.51 cm);
Note: There will be cardboard and/or plastic inserts inside of the panel to prevent
damage during shipping. Panel front door and rear cover will need to be opened
to remove them.

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© 2019 CommScope. All Rights Reserved.
5. Save all shipping containers for use if the equipment requires shipment at a future
date.
3 PANEL INSTALLATION
3.1 Overview
The EHD Panel, shown in Figure 7, is mounted in a 19 inch (48.26 cm) channel rack or
cabinet. When mounting into a cabinet, it is recommended that the rear mounting rails
be 24 inches back (60.96 cm) from the front mounting rails. Trunk breakouts are
intended to come into the rear right or left side of the panel. CommScope trunks with
standard breakouts and gland adapters are the preferred method.
If required per local standards, the panel can be grounded as described in Section 3.3
on Page 10. Ground lugs and ground cables are not provided with the panel.
Figure 7. Mounting Options
Caution: This equipment is to be installed only in Restricted Access Areas (dedicated
equipment rooms, equipment closets, etc.).
26405-B
3.0 IN.
(76.2 CM) 6.0 IN.
(152.5 CM)
RIGHT SIDE VIEW
OF CHASSIS
FRONT OBLIQUE VIEW
OF CHASSIS
MOUNTING POSITION FOR FRONT OF 3-INCH CHANNEL
MOUNTING POSITION FOR BACK OF 3-INCH CHANNEL
MOUNTING POSITION FOR BACK OF 6-INCH CHANNEL
MOUNTING POSITION
FOR FRONT OF
3-INCH CHANNEL
MOUNTING POSITION FOR
BACK OF 3-INCH CHANNEL
MOUNTING POSITION
FOR BACK OF
6-INCH CHANNEL
MOUNTING LOCATION
FOR GROUND LUG
(OPTIONAL)

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3.2 Mounting the Panel
The panel can be installed in a 19-inch (48.26 cm) or 23-inch (58.42 cm) equipment
rack with a 3-inch or 5-inch channel, as shown in Figure 7. Use the following procedure
to mount the panel:
1. Obtain the following tools and equipment:
• Phillips #2 screwdriver;
• Mounting hardware provided.
Figure 8. EHD Panel as Shipped
2. Select the mounting position to be used referring to Figure 7, and if required
remove and re-install the mounting brackets on the panel using the screws
holding the brackets when shipped.
3. Once the mounting brackets are located in the correct position (Figure 10):
a. Select two mounting screws from the accessory pack, and screw the two
screws into the rack bottom mounting position on each rail approximately 1.5
turns (so most of the screw shank is still out).
b. Place the open slots on the bottom of the mounting brackets onto these
screws.
c. Secure the brackets with mounting screws at higher points on the bracket.
Use the first full mounting hole for the top screw.
d. Tighten the bottom screws.
Note: The panel is shipped with the 19-inch mounting brackets at the 3-inch
recess position, as shown in Figure 8. The two 23-inch mounting/shipping
brackets mounted further back can be removed and discarded. To ease
installation, the back cover and side plate/gland adapters assemblies should also
be removed. See Section 4.5 on Page 16.
26531-A
BACK
COVER
19-IN.
MOUNTING BRACKET (2X)
23-IN. SHIPPING/
MOUNTING
BRACKET (2X)
SIDE PLATE/
GLAND
ADAPTERS
ASSEMBLY (4X)

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Figure 9. EHD Panel as Shipped
3.3 Grounding the Panel
A termination (for an M4 screw) is provided on the panel for a frame ground
connection, if required. The connection must be made in accordance with local and
national electrical codes.
Use the following procedure, referring to Figure 10.
1. Locate the ground location on the panel.
Figure 10. Grounding Location
26419-A
SUPPORT CHASSIS
ON SCREW SHANKS
26420-A
RIGHT SIDE VIEW
OF CHASSIS
GROUNDING
LOCATION

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© 2019 CommScope. All Rights Reserved.
2. Using AWG 14 (1.6 mm) solid copper wire, secure a crimp lug to one end of the
ground wire (installer provided). Secure the crimp lug to panel with two M4
screws. Torque the screws to approximately 15 pound-inches (1.7 Newton
meters).
3. Connect the other end of the ground wire to the earth ground conductor. Ensure
this connection is made using methods and hardware that meets all applicable
local and national electrical codes.
4 OPERATION
4.1 Loading Adapter Packs or Modules
For an adapter pack or module to be loaded, the designated blade must be slid out to
the “first position” and then the “second position,” providing access to press the module
or adapter pack unto the blade. Use the following procedure.
1. To slide out a blade to the first (access) position, pull out the pull arm on the right
side of the panel until the blade contacts the first detent, as shown in Figure 11.
Figure 11. Sliding Out Blade to First Position
PULL
ARM
26409-A

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2. To slide out the blade further to the second position (Figure 12):
a. Place index finger into the concave loop on the slide mechanism, place thumb
on the pull arm, and squeeze index finger and thumb together.
b. Slide out the blade until it stops in the second position.
Figure 12. Sliding Out Blade to Second Position
3. Hold the adapter pack or module above the blade, align it with the blade position,
and press it into place as shown in Figure 13 (MPO adapter pack) or Figure 14
(LC-MPO module).
Note: The second position also provides cleaning access to the rear of the
modules.
26410-A
PULL ARM
CONCAVE
LOOP

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Figure 13. Installing MPO Adapter Pack
Figure 14. Installing LC-MPO Module
4. To close the blade, push in the push handle on the right side of the panel until the
blade is fully within the panel.
MPO
ADAPTER
PACK
26411-A
LC-MPO
MODULE
26412-A

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4.2 Accessing Connectors on Back of Modules
The rear connectors on LC-MPO modules are able to be unplugged and cleaned from
the second blade position. Use the following procedure to access the connectors on
the back of an adapter pack.
1. Slide out the blade to the second position as described in the first two steps in
Section 4.1 on Page 11.
2. Pull straight up on the module to remove it from the blade.
3. Clean the connectors following local practice.
4. When done, replace the module and close the blade.
4.3 Closing Blade
To close a blade, push in the push handle on the right side of the panel until the blade
is fully within the panel.
4.4 Removing Blade from Front (if Required)
To remove a blade from the panel (Figure 15):
1. Deflect the tab outward on the right side of the panel.
2. Pull on a gray fiber management finger (not the white pull handle). The gray
management finger is highlighted in yellow in the figure.
Note: The connectors on the rear side of the MPO adapter packs can simply be
unplugged and cleaned from the second blade position.
Note: Pull on the middle fiber management finger as shown.

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Figure 15. Removing Blade From Front
TAB
1
2
FIBER
MANAGEMENT
FINGER
FIBER
MANAGEMENT
FINGER
26532-A

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4.5 Installing Trunk Cables
Trunk cables (“trunks”) are installed from the rear of the panel. The rear cover must first
be removed. Trunks should be installed from bottom up. Cables may be routed to the
panel from either side or from both sides.
Figure 16. Cable Bundled With Hook-and-Loops
Use the following procedure.
1. Remove the rear cover by loosening the captive fasteners, as shown in Figure 17.
Figure 17. Removing the Rear Cover
Note: The preferred trunks for the EHD panel are CommScope trunks with gland
adapters and standard breakout lengths.
Note: Trunks entering through lower level entry points should be routed to the
lower level trays within the chassis and trunks entering through higher level entry
points should be routed to upper level trays within the chassis.
Note: Hook-and-loops should be installed around bundles for each tray. Install
where bundle begins to spread out naturally due to routing lengths. See Figure 16
FASTENER
26413-A

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2. Remove the cable attachment molding from the hole positions where trunks will
be installed, as shown in Figure 18.
Figure 18. Removing the Cable Attachment Molding
3. Depress the tab on the lowest blade. as shown in Figure 18, and pull the blade
backward using the finger pull so that the blade will be accessible for connecting
the trunk connectors to the adapter pack or module already installed on the blade.
Figure 19. Depressing the Tab
Note: Leave the molding plates in place. The plates can be temporarily removed,
however, if space is required (not part of this procedure).
MOLDING
PLATES
TRUNK
OPENINGS
REMOVE
CABLE ATTACHMENT
MOLDING FROM
MOLDING PLATE
SLIDETRAYTO REAR
BY DEPRESSINGTAB
AND PULLING ON
FINGERTAB
26425-A

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4. Based on cable location and number of sub-units, determine the configuration to
be used for routing cables to the EHD panel. Cables may enter the panel from
either side only or from both sides. For an example of single side entry, see
Figure 20. For an example of left and right cable entry, see Figure 21.
Figure 20. Single Entry Cable Routing (Top View)
Figure 21. Left and Right Cable Routing (Rear View)
(Cables With Hook-and-Loops Shown)
Note: Some cables are shipped with protective mesh tubing already installed as
shown in Figure 22 at the cable clamp and in Figure 23 at the entry point to the
EHD panel.
26428-A

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Figure 22. Trunks With Protective Mesh Fitting
Secured in Cable Clamps
Figure 23. Trunks With Protective Mesh Tubing
at Entry Point to EHD Panel
5. Starting with the lowest, rear-most hole, remove the center “knockout” from the
molding. Slide the cable breakout through the slit on the side of the molding.
Before securing the cable to the rack or bracket outside of the panel, make sure
there is enough slack in the cable to allow the blade to be slide forward to the
“second position” (described in Section 4.2 on Page 14).

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Figure 24. Routing in the First Trunk
(Trunk With Gland Adapter Shown)
6. Continue routing in trunks and plugging in connectors, referring to Figure 25,
Figure 26, and Figure 27.
Figure 25. Trunk Routing Into Side of Panel
(Trunk With No Gland Adapter Shown)
Note: Hook-and-loops should be installed around bundles for each tray. Install
where bundle begins to spread out naturally due to routing lengths. Refer to
Figure 21 on Page 18.
Note: Breakout lengths for trunks entering panel from side plates should be 30+/-
3 in. (76.2+/-7.62 cm). CommScope trunk cables with gland adapters meet this
requirement.
CABLES SECURED
TO CABLE BRACKET
(ACCESSORY EHD-CMB)
NOTE: HOOK AND LOOP
AROUND BREAKOUTS AS
THEY ENTER CHASSIS.
26428-A
NOTE:TRUNKS SHOWN
INTHIS FIGURE DO NOT
HAVE GLAND ADAPTER.