Emerson DCM Modular User Manual

Integrated Cabinet Solutions
For Business-Critical Continuity™

Knurr® DCM™ Rack

User Manual

IMPORTANT SAFETY GUIDELINES

SAVE THESE INSTRUCTIONS

This manual contains important instructions that should be closely followed during installation and
maintenance of this unit. Read all safety instructions before attempting to assemble and install the
Knurr DCM. Adhere to all warnings on the unit and in this manual. Follow all instructions.

Read all warnings, cautions and instructions in this before attempting to move, lift, remove packaging
from or preparing unit for installation.

This product is designed for commercial / industrial use only. This product is not intended for use
with life support or o ther U.S. F DA desi gnated “cri tical” devices. Maximum load must not exceed th at
shown on the Knurr DCM rating label.

Operate this product i n a cl ean, ind oor enviro nment t h at i s f re e o f moisture, fl a mm ab le li q ui ds, gas e s
and corrosive substances.

Ensure that the Knurr DCM has proper ventilation. Never block or insert objects into the ventilation
holes or other openings. Ma intain a minimum cle arance of 12 inches (305mm) in front, rear and top of
the Knurr DCM for proper air flow and cooling.

TABLE OF CONTENTS

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 Feedback on Equipment, Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2.1 Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.2 Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.2.1 Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.2.2 Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.3 Mounting Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.2 Required Setup Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.3 Unloading the Knurr DCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.4 Equipment Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.5 Basic Hardw a re In st a ll a t i on —Nutbars and Spring Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.5.1 Inserting a Nutbar or Spring Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.6 Frame and Enclosure Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.6.1 Internal Mounting Rails. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.6.2 Front- and Rear-Mount Rails—Position and Attach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.7 Door—Remove and Reverse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.7.1 Remove the Door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.7.2 Reverse the Door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.7.3 Reverse the Door Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.8 Side Panels—Remove and Replace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.8.1 Remove a Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.8.2 Replace a Side Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.0 OPTIONS—INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

4.1 Anti-Tilt Kit (Part # 540254G1L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.2 1U Tool-Less Fi xe d Sh e l f In st a l l a ti o n. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.3 1U Tool-Less T e le scopic Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.4 2U Locking Drawer Installati o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.5 Power Distribution Unit Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.5.1 Install Tool-Less PDU Mounting Brackets—700 and 800mm Cabinets Only . . . . . . . . . . . . 16

4.5.2 Full-Height PDU Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.6 Install RPC™ BDM™ Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.7 Tool-Less Blanking Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.8 Cluster Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 0

4.8.1 Connect Two Racks Using the Tool-Less Cluster Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.8.2 Connect Two Racks Using the Factory-Installed Cluster Tab. . . . . . . . . . . . . . . . . . . . . . . . . 20

4.9 Cable Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1

4.10 Cable Access —T o p Cove r, Back and Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

i

4.11 Top Cover Cable Management Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.11.1 Internal Cable Management Troughs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.11.2 1U Cable Routing Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.12 Attach Cable Management Option—Cable Fingers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.12.1 Install a Liebert MB Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

5.1 Periodic Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

7.0 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

FIGURES

Figure 1 Side panel lock components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 2 Knurr DCM as shipped. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3 Removing rack from shipping pallet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 4 T-slot configuration and nutbar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 5 Insert nutbar or spring nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 6 Vertical rail repositioning—600mm cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7 Vertical rail repositioning—700 and 800mm cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 8 Door hinge removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 9 Anti-Tilt Legs installed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 10 1U tool-less fixed shelf installation point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 11 1U tool-less telescopic shelf installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 12 Locking drawer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 13 Small PDU mounting bracket on rack frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 14 Full-height PDU mounting brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 15 RPC BDM mounting brackets and fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 16 Installing tool-less blanking panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 17 Cluster connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 18 Top cover for Knurr DCM cabinets 42U and 45U high . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 19 Dress panels along edge of cluster of Knurr DCMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 20 Internal cable trough installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 21 1U Cable Routing Panel installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 22 Cluster cable routing components—assembled and installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 23 Liebert MB mounting brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 24 Liebert MB mounting bracket inserted into Knurr DCM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 25 Knurr DCM model numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

TABLES

Table 1 Rack dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 2 Door dimensions, single door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 3 Door dimensions, split door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 4 Optional side/partition panel sizes and part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 5 Knurr DCM quick-ship part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 6 Accessories part numbers and descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

ii

1.0 INTRODUCTION

The highly versatile Knurr DCM provide an organized, se cure, controlled environment in a single
system for sensitive electronic equipment.

The Knurr DCM is available in three heights—24U, 42U and 45U (47", 78.5" and 83.9"; 1196mm,
1996mm and 2131mm). Those cabinet heights are available in these widths and depths:

Table 1 Rack dimensions

Dimensions, in (mm)

Rack

Size

24U 46.0 (1168) 46.6 (1186) 47.1 (1199) 23.3 (591) 23.6 (600) 38.8 (986) 39.4 (1000)
42U 77.5 (1968) 78.1 (1986) 78.6 (1999) 27.2 (691) 27.6 (700) 42.8 (1086) 43.3 (1100)
45U 82.8 (2103) 83.4 (2121) 83.9 (2134) 31.1 (791) 31.5 (800) 46.7 (1186) 47.2 (1200)

Height, width, and depth dimensions are independent

Frame Only W/ Leveling Feet W/ Casters W/O Sides W/ Sides W/O Doors W/ Doors

Assembly instructions in this manual cover the various configurations of the Knurr DCM, either a
single rack for simple equipment organization or a suite of Knurr DCM racks.

1.1 Feedback on Equipment, Instructions

Height Width Depth

Introduction

Emerson Network Power is highly interested in providing high quality equipment and clear, concise
instructions on installing and using the Knurr DCM and its optional equipment. If you have any
comments about the rack, its options or instructions, visit

www.emersonnetworkpower/DCMfeedback

1

2.0 MAJOR COMPONENTS

A Knurr DCM may have any or all of the components addressed in this section, dependin g on its
configuration.

2.1 Frame

The base of all Knurr DCM products is the frame. The Knurr DCM features a fully assembled,
extruded aluminum frame with a patented T-slot that permits many of the cabinet’s tool-less
mounting features.

The racks can accommodate shelf- or rack-mounted equipment on 19-inch (483mm) adjustable rails.
See Knurr DCM model numbers on page 28 and illustrations for meas urements of different
models.

Cutouts in the top covers permit customer cable entry. The top of the Knurr DCM also is drilled for
mounting a Liebert XDV top-mount cooling unit.

2.2 Enclosure

Exterior components of the Knurr DCM are painted black (RAL 7021)

2.2.1 Doors

All doors are framed from sheet metal and have hexagonal perforations leaving 83 percent of the door
open to airflow for efficient cooling. A two-point latch and push button lock come standard.

Doors are available in single- or dual-door designs for easier access. All doors are removable and
single doors are designed for reversible (left/right) hinging (see 3.7.1 - Remove the Door and 3.7.2 -
Reverse the Door). Each type of door swings 135 degrees. Each door is perforated; each is available
in RAL 7021, matching the rack

Major Components

Doors are available in these styles and sizes:

• 1200mm x 600mm, single, Part # 538444G1L

• 1200mm x 600mm, split, Part # 539273G1L

• 1200mm x 700mm, single,

• 1200mm x 700mm, split, Part # 539273G2L

• 1200mm x 800mm, single, Part # 538444G3L

• 1200mm x 800mm, split, Part # 539273G3L

• 2000mm x 600mm, single, Part # 538444G4L

• 2000mm x 600mm, split, Part # 539273G4L

• 2000mm x 700mm, single, Part # 538444G5L

• 2000mm x 700mm, split, Part # 539273G5L

• 2000mm x 800mm, single, Part # 538444G6L

• 2000mm x 800mm, split, Part # 539273G6L

• 2100mm x 600mm, single, Part # 538444G7L

• 2100mm x 600mm, split, Part # 539273G7L

• 2100mm x 700mm, single, Part # 538444G8L

• 2100mm x 700mm, split, Part # 539273G8L

• 2100mm x 800mm, single, Part # 538444G9L

• 2100mm x 800mm, split, Part # 539273G9L

2.2.2 Side Panels

Side panels for each size cabinet are fashioned from sheet metal. Quarter-turn fasteners outside the
unit permit removal of all panels for maintenance while preserving internal security during normal
operation.

Part # 538444G2L

An optional side panel lock with keys (Part # 011399067L) is available to secure the side panel. The
lock insert is installed near the bottom center of the side panel.

2

To install the Side Panel Lock:

Side Panel Lock
cylinder

Nut to secure Side
Panel Lock to panel

Keys

Side Panel Lock
cam

1. Insert a key into the lock to use as a handle.

2. Remove the locking nut from the cylinder.

3. Insert the lock, cam first, into the panel. The cam should be pointed to the right.

4. Slip the nut over the cam and tighten it onto the plastic lock cylinder.

5. Test the lock to ensure that it operates properly.

Figure 1 Side panel lock components

Major Components

2.3 Mounting Hardware

Hardware to install all options is shipped with the Knurr DCM. Bags of nuts, screws, washers and
other mounting hardware are attached to the frame. Some mounting hardware ships inside the box
containing the optional equipment.

• 50 each: 10-32 cagenuts, screws and rosette washers

• 20 M5 spring nuts

• 20 M5 screws

• 4mm hex Allen wrench

3

3.0 INSTALLATION

Tilt Indicator shows
whether the unit was been
tilted beyond the allowable
limit or mishandled during
shipping

Braces secure Knurr DCM
to shipping pallet; one at
each corner

Shrink wrap secures corrugated
corner protectors to the Knurr
DCM and shields the unit from
contact damage

Corrugated Corner
Protectors at each
corner

Part Number and
Serial Number

3.1 Inspection

Upon receiving a Knurr DCM, examine the packaging for any signs of mishandling or damage. If any
damage is noted, notify your local Liebert representativ e and your carrier immediately.

Figure 2 Knurr DCM as shipped

Installation

3.2 Required Setup Equipment

Each Knurr DCM ships with all the tools necessary to remove the unit from the pallet. The tool kit,
(Part # 542665G1) contains the following tools:

•1 M5 Allen Wrench

•1 M6 Allen Wrench

• 1 Torx L Key ,T30

The following tools are required to set up a Knurr DCM:

• pallet jack or forklift

• utility knife or scissors

• 9/16" ratchet or wrench

• 6mm hex wrench

4

3.3 Unloading the Knurr DCM

!

Raise leveling feet
by turning the hex
nut on each foot
(one at each corner).

... to free the shipping
braces from the pallet.

Remove lag bolts at each
corner of the rack ...

Before unloading a Knurr DCM, note the weight of the model (see 6.0 - Specifications. Use at least
two people when moving the unit.

1. Using a pallet jack or forklift, move the Knurr DCM on its pallet to the installation location.

2. Cut the shrink wrap and remove all packaging.

3. Remove the lag bolts securing each shipping bracket to the shipping pallet; there is one bracket at
each corner of the Knurr DCM; each bracket has two lag bolts (see Figure 3).

4. Raise the leveling feet so that the rack will rest on the feet:
a. Use the supplied hex wrench to lower each caster until the Knurr DCM is not resting on the

shipping brackets.

b. Remove the hex bolts securing the shipping brackets to the Knurr DCM.

Leave the shipping brackets attached if they will be used to secure the cabinet to the floor.

5. Use a pallet jack or forklift to raise the Knurr DCM off the shipping pallet.

6. Slide the shipping pallet out from under the rack.

The Knurr DCM may be position ed for installation either with the forklift, by two or more people
carrying it or by rolling the cabinet on its casters.

If the casters are to be used to move the cabinet, the leveling feet must be raised by reversing Step 4
above. Position the cabinet and either lower the leveling feet or bolt the cabinet to the floor with the
shipping brackets.

Figure 3 Removing rack from shipping pallet

Installation

3.4 Equipment Layout

To keep the unit’s center of gr av ity a s l ow as pos sible, install equipment from the bottom up, starting
with the heavier units. Leave any unused space at the top of the enclosure.

CAUTION

After equipment is installed, the Knurr DCM may ha ve a high center of grav ity. Avoid tipping
the unit when it is being moved.

5

3.5 Basic Hardware Installation—Nutbars and Spring Nuts

Nutbar, Front (above)
and Back (below)

Leaf Springs Stabilize
Nutbar in T-Slot

"W700" and "W80 0"
Stamped on face of
M5 nutbar

Cross-Section of Horizontal
Knurr DCM Frame Member

T-Slots

Spring Nut

Leaf Spring Stabilizes
Spring Nut in T-Slot

T-Slots

Cross-Section of Vertical
Knurr DCM Frame Member

The Knurr DCM is designed with T-slots on exposed faces of the aluminum frame membe rs. These
T-slots permit placing nutbars and spring nuts anywhere along a frame member to mount equipment
at any distance desired (see Figure 4). Nutbars and spring nuts accept M5 and M6 screws used to
attach most equipment and options to the rack’s aluminum frame members.

Figure 4 T-slot configuration and nutbar

Installation

3.5.1 Inserting a Nutbar or Spring Nut

To insert a nutbar or spring nut into a T-slot on the Knurr DCM frame, compress the spring on the
back of the nutbar and slip it into the T-slot (see Figure 5). If the nutbar or spring nut does not
flatten out into the slot, press down on the edge of the block that is too high.

Properly installed nutbars and spring nuts have the thread hole section on the outer side of the T-slot
(see Figure 5). The leaf spring holds the nutbar or spring nut in place while a screw is threaded and
tightened. Nutbars and spring nut s can be pressed down with a small tool and moved for better
alignment.

6

Figure 5 Insert nutbar or spring nut

T-Slot in
Frame

Nutbar in T-Slot

Press leaf spring and slip
edge into T-slot. Flip
nutbar as it slides in.

Spring nut oriented
for insertion into T-Slot

This end
of spring
nut flips
over and
nut slips
into T-Slot

T-Slot

Spring nut
in T-Slot

Installation

3.6 Frame and Enclosure Configurations

3.6.1 Internal Mounting Rails

The Knurr DCM can accommodate rack-mounted or fre e-standi ng comput er and net wo rk equipme nt.
The unit features 19-inch (4 83mm) rack rail s. These in ternal front- a nd rear-mount rai ls are desi gned
in accordance with the EIA 310D rack standard. The rails are adjustable for installing equipment of
different sizes.

Accesories compatible with the 19" rails includes a tool-l ess fixed shelf (Part # 002185000, L-shaped
depth-adjustable support rail (Part # 542777G1), a tool -less telescopic shelf (Part # 535809G1) and
a lockable, fully enclosed 2 U drawer (Part # 011139278). Each is supplied with installation
hardware.

7

3.6.2 Front- and Rear-Mount Rails—Position and Attach

Quarter-T urn Mecha n i cal
Fasteners in T-Slot in
Aluminum Frame at Top
of Cabinet

T-Slot in
Frame

Quarter-Turn Mechanical
Fasteners in T-Slot in
Aluminum Frame at Bottom
of Cabinet

Quarter-Turn Mechanical
Fastener in T-Slot in
Center Depth Support

Front- and rear-mount vertical rails are installed in the Knurr DCM at the factory at 29.13inches
(740mm). They are secured to the 600mm Knurr DCM’s aluminum frame using threaded block
nutbars in the T-slot at top and bottom of the EIA rail and M6 x 12 screws. Mechanical fasteners in
are used in center of the EIA rai l to tie into the center depth supp ort member. Vertical rails are
installed in the 700 and 800mm Knurr DCM using a cross-brace at the top; node brackets are used at
the bottom and on the center horizontal rails. The cross-brace and node brackets att ach to the cabinet
frame with Torx head screws and nutbar. The rails can be moved to change the front-to-rear distance
between the rails.

NOTE

The front and rear vertical rails must be kept at a 90-degree angle to the upper and lower
aluminum frame members. The left and right front vertical rails must be the same distance
from the front of the rack; the left and right rear vertical rails must be the same distance from
the rear of the rack.

If those conditions are not met, equipment and optional features will be difficult to install.

Position Vertical Rails in 600mm Cabinet

1. Determine the proper location of the rails.

2. Remove the quarter-turn fasteners in the middle of one of the rear vertical rails (see Figure 6).

3. Loosen the M6 screws from the nutbar that hold the 19" rail in place at the bottom.

4. Hold the 19" rail to keep it from falling and loosen the M6 screws holding the nutbar at the top of
the 19" rail.

5. Slide the rail as unit to the desired position, making sure it is properly oriented as described in
the Note above.

6. Hold the rail in place, then insert and tighten the quarter-turn fastener in the middle of the
vertical rail.

7. Tighten the M6 screws into the nutbar to reattach the 19" rail.

8. Repeat Steps 2 through 7 for the corresponding vertical rail.

Installation

Figure 6 Vertical rail repositioning—600mm cabinet

8

Position Rails on 700mm and 800mm Cabinets

Screws in
T-Slot in
frame at
bottom of
cabinet

Rail attached
to cross brace
at top left
corner

Screws in
T-slot in
frame

Screws (2) in T -Slot
in Frame

Screw in T-Slot in face of
aluminum frame at
bottom of cabinet. (There
are two screws, one on
each side of the node.)

Quarter-Turn Fas tener;
fastener on the
innerface of the vertical
rail secures the vertical
rail to the bracket

1. Determine the proper location of the rails.

2. Remove center support by loosening the two quick-release mechanical fasteners.
Repeat for other side of the EIA rail frame (see Figure 7).

3. Loosen the four screws that secure the node brackets to the bottom frame member.
Repeat on the other side of EIA rail frame.

4. Loosen the three screws that secure the top EIA rails support bracket to the top frame member.
Repeat on the other side of the EIA rail frame.

5. Slide the rails to their new location. The rails will bind if they are not kept at a right angle to the
frame.

6. Tighten all hardware and reinstall the quick-release mechanical fasteners.

Figure 7 Vertical rail repositioning—700 and 800mm cabinets

Installation

9

3.7 Door—Remove and Reverse

Knurr DCM doors are removable for convenience when installing or maintaining equipment. They
also are reversible, so the single-door may be opened in a more convenient direction if the rack is near
a wall or other equipment.

Doors are supported by two hinges and held in place by gravity. They can be lifted off and reinstalled
without tools.

Doors are available in these styles and sizes:

Table 2 Door dimensions, single door

Door Dimensions, in (mm)

Frame Size

46.6 x 23.6 (1200 x 600)

24U

42U

45U

46.6 x 27.6 (1200 x 700) 27.1 (689) Part # 538444G2L

46.6 x 31.5 (1200 x 800) 31.1 (789) Part # 538444G3L

78.1 x 23.6 (2000 x 600)

78.1 x 27.6 (2000 x 700) 27.1 (689) Part # 538444G5L

78.1 x 31.5 (2000 x 800) 31.1 (789) Part # 538444G6L

83.4 x 23.6 (2100 x 600)

83.4 x 27.6 (2100 x 700) 27.1 (689) Part # 538444G8L

83.4 x 31.5 (2100 x 800) 31.1 (789) Part # 538444G9L

Installation

Part NumberHeight Width

23.2 (589) Part # 538444G1L

46 (1168)

23.2 (589) Part # 538444G4L

78 (1968)

23.2 (589) Part # 538444G7L

83 (2103)

Table 3 Door dimensions, split door

Door Dimensions, in (mm)

Frame Size

46.6 x 23.6 (1200 x 600)

24U

42U

45U

46.6 x 27.6 (1200 x 700) 13.5 (343) Part # 539273G2L

46.6 x 31.5 (1200 x 800) 15.4 (393) Part # 539273G3L

78.1 x 23.6 (2000 x 600)

78.1 x 27.6 (2000 x 700) 13.5 (342) Part # 539273G5L

78.1 x 31.5 (2000 x 800) 15.4 (392) Part # 539273G6L

83.4 x 23.6 (2100 x 600)

83.4 x 27.6 (2100 x 700) 13.5 (342) Part # 539273G8L

83.4 x 31.5 (2100 x 800) 15.4 (392) Part # 539273G9L

46 (1168)

78 (1968)

83 (2103)

Part NumberHeight Width

11.5 (293) Part # 539273G1L

11.5 (292) Part # 539273G4L

11.5 (292) Part # 539273G7L

10

3.7.1 Remove the Door

Hinge is on the Knurr DCM door. Lift the
door until the hinge pins at the top and
bottom clear and slide the door free. The
door is held in place by gravity.

Door Hinge

Hinge Pin

Torx head screws hold
the hinge pin assembly
to the Knurr DCM frame

Hinge Pin Cap (rests on hinge pin)

Door Hinge

Move the Hinge Pin Cap here
when changing the way the
door swings; a screw fits
through the hole to secure
the Hinge Pin Cap

Door

Knurr DCM frame

1. Open the door and swing it open about 90 degrees.

2. Lift the door slightly until the hinge pins clear t he hinge pin caps and slide the door free (see
Figure 8).

Figure 8 Door hinge removal

Installation

3.7.2 Reverse the Door

1. Determine the correct location for the hinge pin assemblies, both top and bottom.

2. Mark the corresponding new positi on on the o pposite side of the Knurr DCM . The frame is ta pped
for proper hinge placement.

3. Lift the door off the Knurr DCM.

4. Take out the screws to remove the hinge pin assemblies; each assembly is attached with two
screws.

5. Attach the hinge pin assemblies in the new locations on the opposite side.

6. Remove the pin and reinstall it on the opposite hole. (When the door is reversed, the pin will be
pointing down.)

7. Extract the screw holding the hinge pin cap in place.

8. Flip the Hinge Pin Cap and insert it in the other end of the hinge on the door (see Figure 8).

9. Insert and tighten the screw holding the Hinge Pin Cap in the hinge.

10. Repeat Steps 7 through 9 for the other hinge.

11. Flip the door, and slide it into place.

12. Remove the unit badges from the front of the door and reattach them near what is now the top of
the door.

3.7.3 Reverse the Door Handle

After the door has b een revers ed, the door handl e of t he Knurr D CM will o perate wi thout adj ustment ,
but it will be upside down. To reverse the handle, follow these steps:

1. Open the door and remove all the bolts holding the door handle and lock assembly, including the
four brackets. Studs and nuts secure the brackets to the door frame.

2. Flip the door handle and lock assembly 180 degrees and reattach it with the bolts and nuts.

3. Check the handle and lock to ensure they operate properly.

11

3.8 Side Panels—Remove and Replace

Knurr DCM side panels are simple to remove and replace, making it easier to install equipment.
Panel removal also eases maintenance and replacing equipment.

Table 4 Optional side/partition panel sizes and part numbers

Part Numbers

Height, mm Depth, mm

1200

2000

2100

3.8.1 Remove a Panel

Side panels are attached to the Knurr DCM with 10 quarter-turn plastic retainers. The top of the side
panel has a lip that hangs on the top of the cabinet.

1000 538521G1L 538521G1L
1100 538521G2L 538521G2L
1200 538521G3L 538521G3L
1000 538521G4L 538521G4L
1100 538521G5L 538521G5L
1200 538521G6L 538521G6L
1000 538521G7L 538521G7L
1100 538521G8L 538521G8L
1200 538521G9L 538521G9L

Side Panels Partition Panels

Installation

To remove a panel, use a large, flat-blade screwdriver to turn each plastic retainers one-fourth of a
turn or 90 degrees counterclockwise. Lift the panel up and away from the rack. Set it aside.

NOTE

Spinning the plastic quarter-turn retainers more than 90 degrees could damage the retainers.

3.8.2 Replace a Side Panel

1. Hang the side panel on the lip at the top of the Knurr DCM frame.

2. Use a large, flat-blade screwdriver to turn each of the 10 panel retaine rs clockwis e one-fo urth of a
turn or 90 degrees.

12

4.0 OPTIONS—INSTALLATION

Anti-Tilt Leg extended. Extending
both legs adds stability for installing
or removing equipment. The Knurr
DCM door must be open to extend
the Anti-Tilt Legs.

Anti-Tilt Leg retracted.
Retracting both legs
permits closing to
permit closing the
Knurr DCM door.

Adjustable foot on each
Anti-Tilt Leg can be
raised or lowered to
steady the Knurr DCM.

Position the top
of the Anti-Tilt
Leg brace near
the center of the
19U mark to
attach it to the
Knurr DCM
frame.

Anti-Tilt Leg brace

4.1 Anti-Tilt Kit (Part # 540254G1L)

An anti-tilt kit can be installed to stablize the Knurr DCM when installing or removing equipment
from the rack. The kit includes the adjustable legs and mounting hardware.

The stabilizer legs attach to the front of the Knurr DCM frame. After attaching the stabilizers, pull
out the metal pin at the top of a leg and extend that leg to the needed distance. Lock it into place by
releasing the spring-loaded pin and letting it lock into the brace that is attached to the rack. To install
the anti-tilt kit:

1. Insert four spring nuts into each T-slot on the front of the rack’s vertical frame member.

2. Align the spring nuts with the holes on the Anti-Tilt Leg.
To move a spring nut, press down on it with a small screwdriver or similar tool and slide it into

position.

3. The top of the Anti-Tilt Leg should be positioned at the 19U mark as shown in Figure 9.

4. Install one Torx head screw in the top hole.

5. Install the two flathead Phillips screws in the two center holes.

6. Install the remaining Torx head screw in the bottom hole.

Figure 9 Anti-Tilt Legs installed

Options—Installation

13

4.2 1U Tool-Less Fixed Shelf Installation

Ta b hooks in slot
in rail

Front Corner
of Shelf

The 1U tool-less fixed shelf (Part # 002185000) has tabs on the front and rear that slip into square
holes in the 19" rails. The shelf has a maximum load rating of 150 lb. (68kg).

NOTE

Do not tilt the back of the 1U tool-less fixed shelf down without securing the extensions. The
extensions do not have a positive stop fixture to keep the extensions from falling out.

Figure 10 1U tool-less fixed shelf installation point

4.3 1U Tool-Less Telescopic Shelf

Options—Installation

The 1U telescopic shelf (Part # 535809G1) has tabs on the upper half of the front and rear to hold it
in place. The telescopic slide is assembled and attached to the shelf for shipping. The shelf has a
maximum load rating of 110 lb. (50kg).

To install the shelf:

1. Pull the telescopic slide toward the back of the sh elf.

2. Press the lock on the telescopic slide and pull the slide off the shelf. The locks work in opposite
directions: press down on the lock on one side to release it; press up on the other lock to release it.

3. Repeat Steps 1 and 2 for the telescopic slide on the other side of the shelf.

4. Hang the telescopic slide on the rack’s rails with the tabs on the upper half of the telescopic slide
(see Figure 11).

Make sure that the front and rear tabs are level; the tabs should be slots with the same number.

5. Repeat Step 4 for the second telescopic slide. Make sure the telescopic slides are level.

6. Slide the shelf into the slide until it reaches the back, securing the components. The shelf will
enter more easily if it is kept square with the telescopic slides. The front of the shelf has a notch to
grasp it when pulling the shelf out (see bottom portion of Figure 11).

14

Figure 11 1U tool-less telescopic shelf installation

Tab hooks
in slot on
rear rail

Hang front end
of telescopic
slide on rail

T ele sco pic slide lock - one on each
slide attached to shelf

Shelf installed; note
notch on front edge

Locking 2U Drawer

Part # 011139278

Mounting
Slots; two on
each side

Mounting
Slots; two on
each side

Options—Installation

4.4 2U Locking Drawer Installation

An optional 2U drawer (Part # 011139278) with a keyed lock is available (see Figure 12). The
drawer has a static load rating of 30 lb. (13.6kg). The drawer mounts with four bolts on the rack’s
front rails.

NOTE

This operation may require two people.

To attach the locking drawer:

1. Determine the mounting position for the drawer.

2. Insert two cagenuts at t he appropriate height in each of the front vertical rail s.
The nuts must be at the same height as determined by the nu mbered mounting hol es on the verti -

cal rails.

3. Support the drawer so that the metal flanges on either side of the drawer are in front of the rail.

4. Insert a thumb screw with a lock washer through a slot in a flange on the drawer.

5. Thread it into the cagenut and tighten firmly, using a hex wrench, if nece ssary.

6. Repeat Steps 4 and 5 to secure the drawer at all four mounting holes in the flanges.

Figure 12 Locking drawer

15

4.5 Power Distribution Unit Mounting

PDU mounting bracket
attached to Knurr DCM
with quarter-turn fastener

Metal tabs fit in
holes on Knurr
DCM rails

Quarter-turn fastener

Power distribution units may be mounted multiple ways in the Knurr DCM rack. They may be
mounted on t he rails or attached to mounting brackets:

• 42U full height PDU mounting brackets (4"W) Part # 539486G1L

• 42U full height PDU mounting brackets (8"W) (Part # 540084G1L)

• 45U full height PDU mounting brackets (4" W) (Part # 539487G1L)

• 45U full height PDU mounting brackets (8"W) (Part # 540085G1L)

• 42U adjustable full height PDU mounting bracket (4"W ) (Part # 542868G1L)

• 45U adjustable full height PDU mounting bracket (4" W) (Part # 542906G1L)

• *42U inset full height PDU mounting bracket (4"W) (Part # 542919G1L)

• *45U inset full height PDU mounting bracket (4"W) (Part # 543002G1L)
* Use this full height PDU bracket only when the center depth support has been removed.

4.5.1 Install Tool-Less PDU Mounting Brackets—700 and 800mm Cabinets Only

1. Choose a position near the top of 19" rail where the first tool-less PDU mounting bracket will be
installed.

2. Hang the tool-less PDU mounting bracket on a 19" rail by slipping the bracket’s metal tabs into
the rectangular shaped cutout on the 19" rail.

3. Insert a high-profile faste ner into the tool-less PDU mounting bracket and turn the fastener to
the right to tighten it (see Figure 13).

4. Insert the other tool-less PDU mounting bracket near the bottom of the 19" rail.
Be sure it is positioned to align with the mounting holes on the PDU.

5. Insert a high-profile quarter-turn fastener into th e tool-less PDU mounting bracket; turn it
clockwise to tighten it.

6. Attach the rack PDU to the upper and lower PDU brackets.

• The left hand tool-less rack PDU mounting bracket part number is Part # 539918G1L

• The right hand tool-less rack PDU mounting bracket part number is Part # 539917G1L

Figure 13 Small PDU mounting bracket on rack frame

Options—Installation

16

4.5.2 Full-Height PDU Mounting Brackets

Three models of full-height PDU mounting brackets may be installed for a greater range of mounting
options. For standard positioning of a PDU, the fi xed type can be used to place a PDU in either rear
corner of the rack. The inset PDU mounting bracket permits mounting a PDU nearer the side of the
cabinet, essentially recovering unused space. The adjustable PDU mounting bracket can be used to
mount a PDU at varying distances from the front or rear of the rack.

Available full-height PDU mounting brackets are:

• 42U, 4" wide: fixed PDU, Part # 539486G1L; inset PDU, Part # 542919G1L; adjustable PDU,

Part # 542868G1L

• 42U, 8" wide: fixed PDU, Part # 540084G1L

• 45U, 4" wide: fixed PDU, Part # 539487G1L; inset PDU, Part # 543002G1L; adjustable PDU,

Part # 542906G1L

• 45U, 8" wide: fixed PDU, Part # 540085G1L

To install a full-height PDU bracket:

1. Position the full-height PDU mounting bracket for installation; refer to Figure 14 for placement.

2. Hold the PDU bracket in place and insert and tighten the fasteners. The fastener used varies
depending on the PDU brac ket and PDU:

• Fixed, full-height PDU mounting bracket: use mechanical, quarter-turn fasteners.

• Inset, full-height PDU mounting bracket: with Liebert MPX
spring nuts; with Liebert MPH
PDU, use mechanical, qua rter-turn fa steners; the center depth sup port must be remo ved from the
cabinet before installing this type of bracket, regardless of the type of PDU to be mounted.

• Adjustable, full-height PDU mounting bracket: with Liebert MPX PDU, use M5 hardware
and spring nuts; with Liebert MPH PDU or Knurr DI-STRIP PDU, use mechanical, quarter-turn
fasteners.

™

PDU use M5 hardware and spring nuts; with Knurr DI-S TRIP®

Options—Installation

™

PDU, use M5 hardware and

17

Figure 14 Full-height PDU mounting brackets

Top or bottom of adjustable, full-

height PDU bracket, 4" wide.

Attaches to inner face of

horizontal alum inum frame

member at top or bottom of rack.

The ends attach to the

aluminum frame members

as shown above.

Top of inset, full-height

PDU bracket, 4" wide

Attaches to inner face of

horizontal aluminum frame

member at top of rack.

Bottom of inset, full-height

PDU bracket, 4" wide

Attaches to upper face of

horizontal aluminum frame

member at bottom of rack.

T op or bottom of fi xed, full-heigh t

PDU bracket. Ends are identical,

permitting use on either side of

the cabinet. 4" wide and 8-inch

wide brackets available)

Center depth support
must be removed
before installing this
type of bracket

RPC BDM
attaches here

Quarter-turn
fastener secures
RPC BDM
mounting
bracket to Knurr
DCM frame

Phillips head screws
secure RPC BDM
mounting bracket to
Knurr DCM door

Options—Installation

4.6 Install RPC™ BDM™ Mounting Brackets

The RPC BDM, used to monitor Liebert MPX and Liebert MPH PDUs, can be mounted on the Knurr
DCM’s aluminum frame or door. Mounting the RPC BDM on the frame requires a quarter-turn
fastener; mounting it on the door is done with two Phillips head screws ( see Figure 15).

Figure 15 RPC BDM mounting brackets and fasteners

18

4.7 Tool-Less Blanking Panels

1U Tool-Less Blanking Panel

(Part # 010200088) Installed in Rack

Front View

2U Blanking Panel;

Snap Fittings on Rear

fit into 19" rails

Tool-less blanking panels can be snapped onto the Knurr DCM 19" rails to block unused portions of
the rack. Blocking the open areas enhancees airflow through the rack equipment. The blanking
panels are available in 1U (Part # 010200087) and 2U (Part # 010200088). Attach the panels by
snaping the tabs on the back into square holes in the 19" rails as shown in Figure 16.

Figure 16 Installing tool-les s blanking panels

Options—Installation

NOTE

Emerson recommends inserting blanking panels in any unused portion of the rack to promote
proper airflow through the rack equipment.

19

4.8 Cluster Configuration

Remove the bolt shown above
on the left cabinet. Swing the
cluster tab over to the cabinet
on the left and reinsert and
tighten the bolt. Repeat for rear
of cabinet.

Position the cluster bracket against
the front of the cabinets to be
connected. Insert and tighten two
low-profile quarter-turn fasteners.

Snap the dress strip into
place to complete the
cluster connections.

Two or more Knurr DCM cabinets of the same hei ght can be connected in a cluster with the optional
Cluster Kit of suite brackets and fle xible dress strip (24U , Part # 539608G1; 42U, Part # 539608G2;
45U, Part # 539608G3) or with the standard, factory-installed cluster tab. The brackets put the
cabinets on 24" (609.6mm) centers, which matches the size of U.S. floor tiles, enhancing integration
with underfloor cooling systems. The bracket and plastic strip serve as finishing pieces and close the
gap between the cabinets.

Connecting Knurr DCMs is easier if the units have been moved to their final installation position
before beginning to attach them in a cluster.

4.8.1 Connect Two Racks Using the Tool-Less Cluster Kit

1. Remove the adjacent side panels from the cabinets that will be clustered together (see 3.8.1 ­Remove a Panel). The panels on the outside of the cluster can be left on the cabinets to help

manage airflow.

2. Get the needed number of tool-less rack cluster kits.
One kit will cluster two racks together in front and rear. Two cluster kits will cluster three cabi-

nets togethers, three cluster kits will cluster four cabinets together and etc. Each cluster kit con­tains four interchangeable metal cluster brackets and two plastic filler strips. Pressing the filler
strips into the opening between the cabinets reduces the loss of cold air.

3. Level the cabinets and make sur e both frames are the same height off the floor.

4. Remove the racks’ doors (see 3.7.1 - Remove the Door if necessary).

5. Install a cluster bracket as shown in Figure 17 by pressing the integral pins into holes in the
cabinet frame.

The brackets can be installed in any order, starting with either the top of the cabinet or the bot­tom of the cabinet.

6. Secure the cluster bracket in place with two quarter-turn fasteners as shown in Figure 17.

7. Repeat Steps 5 and 6 for the remaining cluster bracket.

8. Snap the plastic strip in the gap between the cabinets.

Options—Installation

4.8.2 Connect Two Racks Using the Factory-Installed Cluster Tab

Cabinets being clustered using the cluster tab can be clustered with or without the side panels. To do
so:

1. Make sure the cabinets are the same height off the floor.

2. Remove the bolt on the top of a djacent corners of t he racks, front a nd rear, as shown in the top left
illustration in Figure 17.

Swing cluster tab over to adjacent cabinet and reinsert and tighten the bolt.

Figure 17 Cluster connections

20

4.9 Cable Management

When designing the equipment layout in the Knurr DCM, consider how cables must be run for each
configuration and how cable runs affect cooling, access and operational factors, such as separating
power and communication cables to reduce electromagnetic interference.

Good cable management contributes to:

• Effective airflow for cooling

• Easier cable identification

• Improved access

• Reduced electromagnetic interference

• Proper bend radii, particularly for fiber optic cables

• Adequate support for large cables and heavy cable bundles

NOTE

When installing cables, leave enough slack for the unit to be rolled forward or sideways for
access to components.

Do not defeat the ground/earth connections between the utility/mains outlet and the Knurr
DCM.

Once equipment has been installed, cables for power and communication may be connected. Before
making any connections, check the equipment to ensure that all power switches are in the Off
position.

Numerous cable entrances and management provisions are built into the various Knurr DCM
configurations to ease cable installation.

Additionally, these cable management options are available to assist with routing power and control
cables to reduce electromagnetic interference and to improve airflow:

•Cable Fingers—Part # 010200078

• Lobster Claw
pack of 10, Part # 002185050
pack of 100, Part # 002185070

• Velcro Straps
pack of 10, Part # 002185060
pack of 100, Part # 002185080

• Cable Trough, (482.6mm), Part # 050400558

• 1U Cable Routing Panel—Part # 011170208

• 1U Cable Routing Panel with D Rings—Part # 011171448

Velcro straps are field-attached in any number of ways. They can be wrapped through slots in the
internal mounting rails and support vertical cable management, attached through small brackets or
to other components.

Options—Installation

21

4.10 Cable Access—Top Cover, Back and Base

Cable Entry Holes (four places)
Standard Roof Grommets
(P/N 539536P1) Supplied

Busway Mounting
Bracket Cutout
(Each Rear Corner)

Fan/CableAccess Hole
Standard Cover Plate
(P/N 540939P1) Supplied

Liebert XDV
Mounting
Holes

5.47"

(139mm)

7.76"

(197mm)

12.1" (307mm)

2.5" (64mm)

FRONT

OF CABINET

REAR

OF CABINET

Cover shown is for
cabinets 42U and 45U
high; cover for 24U
cabinet is solid, with
one 4" (101.6mm)
diameter hole in each
corner

A fully removable top cover is available on Knurr DCM enclosures . These features are available:

• 24U cabinets: solid, with one 4" (101.6mm) diameter hole in each corner

• 42U and 45U cabinets: rectangular hole in the rear for mounting a fan or or for cabling. Four

cable entry slots, supplied with grommets are also available for cabling. Slots at each side on the
rear are fabricated for accepting tool-less modular busway brackets.

Figure 18 Top cover for Knurr DCM cabinets 42U and 45U high

Options—Installation

4.1 1 Top Cover Cable Management Kit

The bottom of the Knurr DCM is open for cable entry. The low-profile caster plinth has a rectangular
slot for cable entry.

Top Cover Cable Management kits assist in organizing cables routed across the top of one or more
Knurr DCM racks. Panels may be attached to the front, rear and sides of the Knurr DCM and a
center management unit may be installed in the center of the racks.

The front, rear an side pa nels attach to the cabinet with the bolts at each corner (see Figure 19).
Center cable management units attach to the Knurr DCM with tabs that fit into slots on the top
cover. They are held in place by spring tension.

1. Install the center piece first by squeezing it and sliding the four tabs into the holes in the top of
the rack.

2. Remove the frame-member bolts at the front left and front right corners of a Knurr DCM.

3. Position the front top cover cable management panel so the holes at each end align with the bolt
holes.

4. Reinsert the bolts and tighten them.

5. Repeat Steps 2 through 4 for the rear of rack.

22

Figure 19 Dress panels along edge of cluster of Knurr DCMs

Cables can cross
front to back through
the center units

Cables can be
routed lengthwise
through the center
unit

Panels bolt
to the top of
the Knurr DCM

Bracket used to connect
Knurr DCM cabinets

Front panels
on Knurr DCM
cabinets

Options—Installation

Three-piece Top Cover Cable Management kits for racks within a row (front and rear panels, center
cable management unit):

• 600 wide cabinet: Part # 537876G1

• 700 wide cabinet: Part # 537887G1

• 800 wide cabinet: Part # 537877G1

Two-piece Top Cover Cable Management kits for racks at the end of a row (side panels only):

• 1000 deep cabinet: Part # 537878G1

• 1100 deep cabinet: Part # 537879G1

• 1200 deep cabinet: Part # 537880G1

23

4.11.1 Internal Cable Management Troughs

Cable Trough, 19"

Part # 050400558

Flange attaches
to vertical rails with
quarter-turn fasteners

Flange attaches
to vertical rails with
quarter-turn
mechanical fasteners

1U Cable Routing Panel
positioned for attachment
to the Knurr DCM’s rails

1U Cable Routing Panels

Part # 011171448

Internal Cable Management Troughs may be installed to support wiring across short spans, such as
when it must cross the width of t he cabinet. The optional accessory mounts on the Knurr DCM’s 19"
rails as shown in Figure 20. Use spring nuts, washers and screws to mount trough to rails or to the
aluminum frame members.

Figure 20 Internal cable trough installation

4.1 1.2 1U Cable Routing Panel

Cable Routing Panels (Part # 011171448) may be installed to separate cables and wiring to reduce
clutter, to reduce chafing and to ease determining a cable’s purpose, such as communication to a
server. The optional accessory mounts on the Knurr DCM’s rails, as shown in Figure 21. Insert
cagenuts in rails where the radial limit will be installed, attach the routing panel and pull cables
through the slot.

Routing panels may be installed to separate cables and wiring to reduce clutter and improve airflow.
The optional accessory mounts on the Knurr DCM’s rails, much like the cable routing panel. Insert
cagenuts in rails where the routing panel will be installed, attach the routing panel and slip cables
through the prongs.

Options—Installation

Figure 21 1U Cable Routing Panel installation

24

4.12 Attach Cable Management Option—Cable Fingers

Hooks fit into
longer slots

Screw fits
in hole

Quarter-turn
fastener attaches
in rectangular hole

Liebert MB fits in
either or both of
these adjustable
slots in this double
busway bracket

Liebert MB installed with single busway
bracket; mounting brackets must be
installed in alternating slots

Quarter-turn
fastener in one
side of the
bracket permits
opening and
closing to
install the
Liebert MB

The Cable Fingers (Part # 010200078) option permits routing cables in the void between Knurr DCM
racks in a cluster configuration. The cables can be strung through the fingers of the Cable Fingers
and into an adjacent rack.

A Knurr DCM will accommodate two sets of the Cable Fingers installed one above the other in a 42U
or 45U cabinet.

Hang the Cable Fingers on the rails by fitti ng the tabs into slots as shown in Figure 22. The
uppermost tab on the Cable Fingers should be in the fourth slot from the top.

Cable Fingers should be hung on each rack for easier routing of cables into each.

Figure 22 Cluster cable routing components—assembled and installed

Options—Installation

4.12.1 Install a Liebert MB Mounting Bracket

Figure 23 Liebert MB mounting brackets

The Liebert MB mounting bracket is needed for installing a Liebert MB modular busway on a Knurr
DCM. The Liebert MB provides power connections to multiple rack-mounted and room power
distribution units, uninterruptible power systems and surge protection devices. The Knurr DCM
cabinets must be aligned, but need not be attached in a clust er configuratio n. Refer to the Li ebert MB
user manual for details on installing the power supply system.

The mounting brackets attach at the rear of the Knurr DCM. One bracket must be installed in each
Knurr DCM to hold the Lieb ert MB securely (see Figure 23).

25

To install Liebert MB mounting brackets on a row of Knurr DCM cabinets:

Liebert MB mounting
bracket inserted into
Knurr DCM viewed from
inside Knurr DCM

Quarter-turn fasteners
inserted and tightened

Slot for quarter-turn
fastener in T-slot on
cabinet frame member

1. Insert the bottom of the mounting bracket through one of the two slots in the rear of the first
Knurr DCM in the row.

2. Hold the bracket against the cabinet frame member and attach it with metal quarter-turn
fasteners (see Figure 24)

Figure 24 Liebert MB mounting bracket inserted into Knurr DCM

Options—Installation

26

5.0 MAINTENANCE

5.1 Periodic Maintenance

Your Knurr DCM cabinet requires no special maintenance. It should be cleaned periodically, more
frequently if the air in the vicinity is not filtered for particulates.

Dust should be cleaned from installed equipment according to the manufacturer’s recommendations.
Clean the interior of the cabinet with a dry cloth.

Maintenance

27

6.0 SPECIFICATIONS

DC6111—2A

PRODUCT
D = Knurr DCM

HEIGHT
C = 24U (1200mm)
K = 42U (2000mm)
M = 45U (2100mm)

WIDTH
6 = 23.6" (600mm)
7 = 27.6" (700mm)
8 = 31.5" (800mm)

DEPTH
A = 39.4" (100 0mm)
B = 43.3" (1100mm)
C = 47.2" (120 0mm)

FRONT DOOR
0 = No Door
1 = Single Perforated Door
2 = Split Perforated Doors

REAR DOOR
0 = No Door
1 = Single Perforated

Door

2 = Split Perforated

Doors

SIDE/PARTITION
PANELS
0 = None
1 = 1 Side Panel
2 = 2 Side Panels
3 = 1 Partition Panel
5 = 1 Side Panel and 1 Partition

Panel

COLOR
1 = Black (RAL 7021)

DESIGN REGION
A = Asia/Pacific
E = EMEA
N = North America
G = Global

A

Reserved

D C 6 A 1 1 2 A

The sample part number above and at the top of
the page specifies a Knurr DCM with these
characteristics:

• Height—24U (1200mm)

• Width—23.6" (600mm)

• Depth—39.4" (1000mm)

• Front Door—single, perforated

• Rear Door—single, perforated

• Side Panels—2

• Color—black

• Design Region—Asia/Pacific

Figure 25 Knurr DCM model numbers

Specifications

Table 5 Knurr DCM quick-ship part numbers

Part # Description
D4224442 42U x 24" W x 44" D With Si de Panels
D4224440 42U x 24" W x 44" D No Side Panels
D4232442 42U x 32" W x 44" D With Si de Panels
D4232440 42U x 32" W x 44" D No Side Panels

28

Accessories

7.0 ACCESSORIES

Table 6 Accessories part numbers and descriptions

Part # Description On Page

D4224442 42Ux600x1100 Quick Ship Rack with Sides 28
D4224440 42Ux600x1100 Quick Ship Rack Without Sides 28
D4232442 42Ux800x1100 Quick Ship Rack with Sides 28

D4232440 42Ux800x1100 Quick Ship Rack Without Sides 28
035351081 24 NEMA 5-20r (T-slot) Receptacles, 30A L5-30 Locking Input, 10' Cord
035352061 24 IEC C-13 Receptacles, 30A L6-30 Locking Input, 10' Cord
002185050 Tool-Less Cable Management Lobster Claw (Pack of 10) 21
002185060 Tool-Less Cable Management Velcro Strip (Pack of 10) 21
002185070 Tool-Less Cable Management Lobster Claw (Pack of 100) 21
002185080 Tool-Less Cable Management Velco Strip (Pack of 100) 21
010200064 One or Two Rack Solutions Populated with Rack PDU and UPS, Rack Size 42Ux600x1100

538444G1L 24U 1200x600 Single Perforated Door 2
539273G1L 24U 1200x600 Split Perforated Doors 2
538444G2L 24U 1200x700 Single Perforated Door 2
539273G2L 24U 1200x700 Split Perforated Doors 2
538444G3L 24U 1200x800 Single Perfortated Door 2
539273G3L 24U 1200x800 Split Perfortated Doors 2
538444G4L 42U 2000x600 Single Perforated Door 2
539273G4L 42U 2000x600 Split Perforated Doors 2
538444G5L 42U 2000x700 Single Perforated Door 2
539273G5L 42U 2000x700 Split Perforated Doors 2
538444G6L 42U 2000x800 Single Perforated Door 2
539273G6L 42U 2000x800 Split Perforated Doors 2
538444G7L 45U 2100x600 Single Perforated Door 2
539273G7L 45U 2100x600 Split Perforated Door 2
538444G8L 45U 2100x700 Single Perforated Door 2
539273G8L 45U 2100x700 Split Perforated Door 2
538444G9L 45U 2100x800 Single Perforated Door 2
539273G9L 45U 2100x800 Split Perforated Doors 2
538521G1L 24U Sheet Steel Side Panel 1200mm H x 1000mm D 2, 12
538521G2L 24U Sheet Steel Side Panel 1200mm H x 1100mm D 2, 12
538521G3L 24U Sheet Steel Side Panel 1200mm H x 1200mm D 2, 12
538521G4L 42U Sheet Steel Side Panel 2000mm H x 1000mm D 2, 12
538521G5L 42U Sheet Steel Side Panel 2000mm H x 1100mm D 2, 12
538521G6L 42U Sheet Steel Side Panel 2000mm H x 1200mm D 2, 12
538521G7L 45U Sheet Steel Side Panel 2100mm H x 1000mm D 2, 12
538521G8L 45U Sheet Steel Side Panel 2100mm H x 1100mm D 2, 12
538521G9L 45U Sheet Steel Side Panel 2100mm H x 1200mm D 2, 12
539920G1L 42U Partition Panel 2000mm H x 1000mm D 2, 12
539920G3L 42U Partition Panel 2000mm H x 1100mm D 2, 12
539920G5L 42U Partition Panel 2000mm H x 1200mm D

39920G7L 45U Partition Panel 2100mm H x 1000mm D 2, 12

5
539920G9L 45U Partition Panel 2100mm H x 1100mm D 2, 12

539920G11L 45U Partition Panel 2100mm H x 1200mm D 2, 12

2, 12

29

Accessories

Table 6 Accessories part numbers and descriptions (continued)

Part # Description On Page

539952G1L 42U x 700mm W Vertical Blanking Panel W/cut Outs 2000mm H, Two Pieces
539957G1L 42U x 800mm W Vertical Blanking Panel w/Cutouts, 2000mm H, Two Pieces
539961G1L 45U x 700mm W Vertical Blanking Panel w/Cutouts ,2100mm H, Two Pieces
539962G1L 45U x 800mm W Vertical Blanking Panel w/Cutouts, 2100mm H, Two Pieces
542306G1L 42U x 700mm W Vertical Blanking Panel Solid, 2000mm H, Two Pieces
542332G1L 42U x 800mm W Vertical Blanking Panel Solid, 2000mm H, Two Pieces
542339G1L 45U x 700mm W Vertical Blanking Panel Solid, 2100mm H, Two Pieces
542340G1L 45U x 800mm W Vertical Blanking Panel Solid, 2100mm H, Two Pieces
539486G1L 42U 2000mm Full Height PDU Mounting Bracket (4" wide) 17
542868G1L 42U 2000mm Adjustable Full Height PDU Mounting Bracket (4" wide) 17
542919G1L 42U 2000mm Inset Full Height PDU Mounting Bracket (4" wide) 17
540084G1L 42U 2000mm Full Height PDU Mounting Bracket (8" wide) 17
539487G1L 45U 2100mm Full Height PDU Mounting Bracket (4" wide) 17
542906G1L 45U 2100mm Adjustable Full Height PDU Mounting Bracket (4" wide) 17
543002G1L 45U 2100mm Inset Full Height PDUmounting Bracket (4" wide) 17
540085G1L 45U 2100mm Full Height PDU Mounting Bracket (8" wide) 17
539917G1L Rh PDU Mounting Bracket for DCM Rail 700-800mm
539918G1L Lh PDU Mounting Bracket for DCM Rail 700-800mm
163796G1L Fan 1000l Low Noise
163796G3L Fan 1000h High Ambient
539991G1L 24U DCM EIA Server Rail Kit for 1200mm H - Two Pieces
539814G1L 42U DCM EIA Server Rail Kit for 2000mm H - Two Pieces
539818G1L 45U DCM EIA Server Rail Kit for 2100mm H - Two Pieces

538569G1
002185000 1U Fixed Tool-Less Shelf, 150lb. (68kg) Load Rating 14

011139278 2U Locking Drawer 15

535809G1 1U Telescopic Shelf, 110lb. (50kg) Load Rating 14

542777G1 “L” Shaped Depth Adjustable Support Rail, Two-Piece Kit 8
010200087 1U Tool-Less Plastic Blanking Panel, Box of 10 19
010200088 2U Tool-LessTool-Less Plastic Blanking Panel, Box of Five 19

540785G1L Air Diverter for IT Switch, 4U
540785G2L Air Diverter for IT Switch, 12U
540785G3L Air Diverter for IT Switch, 15U

010200085 Low-Profile Quarter-Turn Plastic Mechanical Fastener, Bag of 10
010200086 High-Profile Quarter-Turn Plastic Mechanical Fastener, Bag of 10

536650G1 Metal, Quarter-Turn Mechanical Fastener, Bag of 10

540536G1L
538619G1L Kit RPC BDM Bracket to Mount the RPC BDM on the Perforated Door

541100G1L Kit RPC BDM Bracket to Mount the RPC BDM on T-Slot on Knurr Rack

013504059 Kit of 50 Pieces M6 Spring Nut

540254G1L Anti-Tilt System, One Set of Two Deployable Legs 13

539994G1 Set of Two Horizontal Caster Brackets with Integrated Leveling Feet for 600mm wide

539996G1 Set of Two Horizontal Caster Brackets with Integrated Leveling Feet for 700mm wide

539997G1 Set of Two Horizontal Caster Brackets with Integrated Leveling Feet for 800mm wide

Hardware to Mount Components on EIA Rail 50 Each M5 Cagenuts, Screws and Rosette
Washers

Kit of One Mounting Bracket to Sec ure A and B Bus way to Knurr DCM Frame; U se On e for Every
5' of Cabinet Run

30

Accessories

Table 6 Accessories part numbers and descriptions (continued)

Part # Description On Page

011309347 Kit of Four Anchor Kits to Secure Cabinet to Raised Floor

540275G1L Lock Insert Kit of Two Lock Inserts and Four Keys

000784649 Handle

011399067L Side Panel Lock Set, Contains One Side Panel Lock and Two Keys 2

539608G1 24U Tool-Less Cluster Kit 20

539608G2 42U Tool-Less Cluster Kit 20

539608G3 45U Tool-Less Cluster Kit 20
011171448 1U 19" Mount Cable Routing Panel with D Rings 21
011170208 1U 19' Mount Cable Routing Panel, Allows Cable to Pass Through Front to Rear 21
050400558 19" Cable Trough, Internal 24

537876G1 Top Cover Based Cable Routing Kit for 600mm W Cabinet, Includes Front and Rear Trim Pieces 22

537887G1 Top Cover Based Cable Routing Kit for 700mm W Cabinet, Includes Front and Rear Trim Pieces 22

537877G1 Top Cover Based Cable Routing Kit for 800mm W Cabinet, Includes Front and Rear Trim Pieces 22

537878G1 Kit of Two Trim Pieces for Top Cover Based Cable Management, 1000mm D Cabinet 22

537879G1 Kit of Two Trim Pieces for Top Cover Based Cable Management, 1100mm D Cabinet 22

537880G1 Kit of Two Trim Pieces for Top Cover Based Cable Management, 1200mm D Cabinet 22
010200078 Kit of Two 18U Vertical Fingers Includes Hardware and Mounting Instructions 21, 25

542665G1 Tool Kit, Contains One M5 Allen Wrench, One M6 Allen Wrench, One Torx L Key, T30 4

31

Ensuring The High Availability
Of Mission-Critical Data And Applications.

Emerson Network Power, a business of Emerson (NYSE:EMR),
is the global leader in enabling Business-Critical Continuity

™

from grid to chip for telecommunication networks, data centers,
health care and industrial facilities. Emerson Network Power
provides innovative solutions and expertise in areas including
AC and DC power and precision cooling systems, embedded
computing and power, integrated racks and enclosures,
power switching and controls, infrastructure management,
and connectivity. All solutions are supported globally by local
Emerson Network Power service technicians. Liebert AC power,
precision cooling and monitoring products and services
from Emerson Network Power deliver Efficiency Without
Compromise

™

by helping customers optimize their data center

infrastructure to reduce costs and deliver high availability.

While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2010 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Liebert is a registered trademark of Liebert Corporation.
All names referred to are trademarks
or registered trademarks of their respective owners.

Technical Support / Service

Web Site

www.liebert.com

Monitoring

[e-mail]

800-222-5877

Outside North America: +00800 1155 4499

Single-Phase UPS & Server Cabinets

[e-mail]

800-222-5877

Outside North America: +00800 1155 4499

Three-Phase UPS & Power Systems

800-543-2378

Outside North America: 614-841-6598

Environmental Systems

800-543-2778

Outside the United States: 614-888-0246

Locations

United States

1050 Dearborn Drive

P.O. Box 29186

Columbus, OH 43229

Europe

Via Leonardo Da Vinci 8

Zona Industriale Tognana

35028 Piove Di Sacco (PD) Italy

[phone]

Fax: [phone]

Asia

29/F, The Orient Square Building

F. Ortigas Jr. Road, Ortigas Center

Pasig City 1605

Philippines

[phone]

Fax: [phone]

Emerson Network Power.
The global leader in enabling Business-Critical Continuity

™

EmersonNetworkPower.com

Emerson, Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks of Emerson Electric Co. or one of its affiliated companies.
©2010 Emerson Electric Co.

AC Power
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