Black Box RM220A User manual

User Manual
• RM210A is a 2-post, 11U mobile rack that supports 1000 pounds.
• RM215A is a 4-post, 11U mobile rack that supports 1500 pounds.
• RM220A is a 2-post, 19U mobile rack that supports 1000 pounds.
• RM225A is a 4-post, 19U mobile rack that supports 1500 pounds.
Mobile Open Rack
Order toll-free in the U.S. or for FREE 24/7 technical support: Call 877-877-BBOX
(outside U.S. call 724-746-5500)
www.blackbox.com • [e-mail]
Contact
Information
RM210A RM220A
RM215A RM225A

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Important Information
Trademarks Used in this Manual
Black Box and the Double Diamond logo are registered trademarks of BB Technologies, Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
Quick List of Certifications
• 19" EIA-310 rackmount standard
• Designed for indoor use only!
Problems? Call our FREE 24/7 technical support at 877-877-2269!
Receiving, Unpacking, and Removing the Mobile Open Rack
Inspect for damage and report any before receiving. Unpack the rack by carefully removing the corrugated carton and corners.
Avoid damaging the rack when removing packaging.
WARNING: Be careful when moving the rack. Sudden stops and starts, excessive force, obstructed routes, and uneven floor
surfaces may cause the rack to topple over.
WARNING: To maintain a uniform distribution of the mechanical load in the Premier Aluminum Distribution Rack, load the
heaviest equipment first.
Floor Use
The mobile open rack is designed to be used in office and and light industrial environments only on secure and level floor surfaces.
Rolling the mobile open racks on uneven or unsecure floor surfaces could result in damage to the mobile open rack, equipment
housed, or operator.
WARNING: Improper handling and use of the Mobile Open Rack could result in equipment damage or personal injury.
Service
The Mobile Open Rack should be repaired by personnel trained by Black Box, or returned to Black Box for repair or replacement.
Contact Black Box Technical Support at 877-877-2269 or go to blackbox.com and click on ”Talk to Black Box.”

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Table of Contents
Table of Contents
1. Specifications.........................................................................................................................................................................4
2. Overview ...............................................................................................................................................................................5
2.1 Description ....................................................................................................................................................................5
2.2 Features.........................................................................................................................................................................5
2.3 What’s Included ............................................................................................................................................................6
2.4 Hardware Description....................................................................................................................................................6
2.4.1 RM210A ..............................................................................................................................................................6
2.4.2 RM215A ..............................................................................................................................................................7
2.4.3 RM220A..............................................................................................................................................................8
2.4.4 RM225A..............................................................................................................................................................9
3. Assembly Instructions.......................................................................................................................................................... 10
3.1 RM210A ...................................................................................................................................................................... 10
Tool List ....................................................................................................................................................................... 10
Parts List ...................................................................................................................................................................... 10
RM210A Exploded View.............................................................................................................................................. 11
Assembling the RM210A............................................................................................................................................. 12
3.2 RM215A ...................................................................................................................................................................... 16
Tool List ....................................................................................................................................................................... 16
Parts List ...................................................................................................................................................................... 16
RM215A Exploded View.............................................................................................................................................. 17
Assembling the RM215A............................................................................................................................................. 18
3.3 RM220A ......................................................................................................................................................................22
Tool List .......................................................................................................................................................................22
Parts List ......................................................................................................................................................................22
RM220A Exploded View .............................................................................................................................................23
Assembling the RM220A.............................................................................................................................................24
3.4 RM225A ......................................................................................................................................................................28
Tool List ....................................................................................................................................................................... 28
Parts List ......................................................................................................................................................................28
RM225A Exploded View .............................................................................................................................................29
Assembling the RM225A.............................................................................................................................................30

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Chapter 1: Specifications
1. Specifications
Number of Rack Units (RU) RM210A. RM215A: 11U;
RM220A, RM225A: 19U
Number of Posts RM210A, RM220A: 2;
RM215A, RM225A: 4
Mounting DepthRM215A, RM225A: 29" (73.6 cm)
Mounting Holes M6 square
Rackmount 19" EIA-310 rails w/ M6 square holes
Construction Heavy-duty, 14-gauge steel
Finish Rack: Black, matte-power coat;
Hardware (nuts, screws, and washers): Zinc-coated
Weight Capacity RM210A, RM220A: 1000 lb. (453.6 kg);
RM215A, RM225A: 1500 lb. (680.38 kg);
Weight
RM210A: 23.3 lbs. (10.56 kg);
RM215A: 35.7 lb. (17 kg);
RM220A: 27.6 lb. (12.5 kg
RM225A: 45.3 lbs. (20.54 kg)
Dimensions
RM210A: 24.27"H x 22.47"W x 19.86"D (61.64 x 57.1 x 50.4 cm);
RM215A: 24.27"H x 22.47"W x 29.36"D (61.64 x 57.1 x 74.57 cm);
RM220A: 38.27"H x 22.47"W x 19.86"D (94.66 x 57.1 x 50.4 cm);
RM225A: 38.27"H x 22.47"W x 29.36"D (97.20 x 57.1 x 74.57 cm)
Bottom Plate Dimensions
20" x 20" (50.8 x 50.8 cm)
NOTE: Bottom plate serves as a built-in shelf.
Casters 2-inch, dual, heavy-duty locking and swiveling

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Chapter 2: Overview
2. Overview
2.1 Introduction
The Mobile Open Rack provides a sitting-level or standing-level desk open rack enclosure on locking, swiveling casters and holds
equipment of your choice neatly under your desk. To store IT, test, diagnostic, and other electrical equipment on the rack under
your desk, just slide the equipment rack in place. To roll the rack out from under your desk, unlock the casters and roll out the
rack, and your equipment is easily accessible for testing or operating. To replace the loaded rack under your desk, slide it under
and lock the casters to secure it in place under your desk. The rack holds 1000 or 1500 pounds (453.6 or 680.38 kg)
of equipment in its standard 19-inch-rack-width open enclosure on 2- or 4-post rails.
Comparison Chart
Part Number Rail Type Rack
Height Mounting Depth Weight Capacity Desk Height
RM210A 2-post 11U —1000 lb.
(453.6 kg) Standard (sitting) 24.5" (62.2 cm)
RM215A 4-post 11U 29" (73.6 cm) 1500 lb. (
680.38 kg) Standard (sitting) 24.5" (62.2 cm)
RM220A 2-post 19U —1000 lb. (453.6 kg) Standing 38.5" ( 97.7 cm )
RM225A 4-post 19U 29"(73.6 cm) 1500 lb. ( 680.38 kg) Standing 38.5" ( 97.7 cm )
2.2 Features
• Eliminate the mess on your desk. Rackmount IT, test, diagnostic, and other electrical equipment under sittingor standing-height
desks (38.5" for the RM220A and RM225A, 24.5" for the RM210A and RM215A).
• Designed for mobility; heavy-duty casters easily handle thresholds, carpets, uneven floors, and rough surfaces.
• Designed by engineers for engineers, developers, designers, technicians, and test labs.
• Ideal for IT, electronic, and electrical engineers and technicians.
• 4-post versions (RM215A and RM225A) have a mounting depth of 29".
• Dual, heavy-duty, swiveling and locking casters hold up to 1000 lb. on the 2-Post versions (RM210A and RM220A) and 1500 lb.
on the 4-post versions (RM215A and RM225A).
• Designed for daily mobile use.
• 11U (RM210A and RM215A) and 19U (RM220A and RM225A) Standard EIA-310 19-inch rack rails w/ M6 square holes.
• Bottom plate serves as a 20” x 20” built-in shelf.
• Constructed of heavy-duty 14-gauge steel with a durable, matte-black powder-coat finish.
• Has M6 square holes on rack sides for mounting accessories.
• Includes (25) M6 cage nuts and M6 x 12-mm screws.
• Ships with limited assembly required.

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Chapter 2: Overview
2.3 What's Included
The parts list in the Assembly section of this manual lists everything that's included with your rack.
2.4 Hardware Description
Figures 2-1 through 2-4 show the Mobile Open Rack models available. Detailed assembly instructions are included in the
Assembly section of this manual.
2.4.1 RM210A
Figure 2-1. Mobile Open Rack - 2-Post, 11U (RM210A), top, angled front, and straight-on front views.

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Chapter 2: Overview
2.4.2 RM215A
Figure 2-2. Mobile Open Rack - 4-Post, 11U (RM215A)., top, angled front, and straight-on front views.

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Chapter 2: Overview
2.4.3 RM220A
Figure 2-3. Mobile Open Rack - 2-Post, 19U (RM220A), top, angled front, and straight-on front views..

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Chapter 2: Overview
2.4.4 RM225A
Figure 2-4. Mobile Open Rack - 4-Post, 19U (RM225A), top, angled front, and straight-on front views.

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Chapter 3: Assembly Instructions
3. Assembly Instructions
3.1 RM210A
Tool List
Item Number Tool Description
113-mm open-end wrench
213-mm socket and ratchet
Parts List
Item Number Quantity Part Description
1 1 2-post base plate
2 1 11U rack top
3 2 swivel caster
4 2swivel, locking caster
5 22 M8 x 16-mm hex-head machine screw
6 22 M8 hex nut
7 44 M8 flat washer
8 25 M6 cage nut (not shown in exploded view)
9 25 M6 x 12-mm pan-head machine screw (not shown in exploded view)

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Chapter 3: Assembly Instructions
RM210A Exploded View
Figure 3-1. RM210A exploded view.

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Chapter 3: Assembly Instructions
Assembling the RM210A
STEP 1: Place the 11U rack top (#2 in Figure 3-1) on the 2-post base plate (#1 in Figure 3-1) so that the three holes align on both
sides.
Figure 3-2. RM210A assembly, Step 1.

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Chapter 3: Assembly Instructions
STEP 2: Bolt the 11U rack top (#2 in Figure 3-1) to the 2-post base plate (#1 in Figure 3-1) using (6) M8 x 16-mm hex-head
machine screws (#5 in Figure 3-1), (6) M8 hex nuts (#6 in Figure 3-1), and (12) M8 flat washers (#7 in Figure 3-1). Do not tighten
the bolts until all six hex head screws are inserted through their appropriate holes.
Figure 3-3. RM210A assembly, Step 2.

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Chapter 3: Assembly Instructions
STEP 3: Tighten down all bolts holding the hex nut (#6 in Figure 3-1) with the open-end wrench (#1 in Tool List) and tighten the
bolt head with the socket wrench (#2 in Tool List).
STEP 4: Attach the (2) swivel casters (#3 in Figure 3-1) and (2) swivel, locking casters (#4 in Figure 3-1) to the bottom of the
2-post base plate (#1 in Figure 3-1) using the remaining (16) M8 x 16-mm hex-head machine screws (#5 in Figure 3-1), (16) M8
hex nuts (#6 in Figure 3-1), and (32) M8 flat washers (#7 in Figure 3-1). Locking casters (#4 in Figure 3-1) should be attached on
the same side. Do not attach locking casters on diagonal corners.
Figure 3-3. RM210A assembly, Step 4.

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Chapter 3: Assembly Instructions
STEP 5: Assembly is complete.
Figure 3-4. RM210A assembly, Step 5.
STEP 6: Use the included (25) M6 cage nuts (not shown in Figure 3-1) and (25) M6 x 12-mm pan-head machine screws (also not
shown in Figure 3-1) for mounting equipment.
The Mobile Open Rack requires no further installation. Just slide it under your sitting-height or standing-height desk and roll the
rack out when you need to access IT, test, diagnostic, and other electrical equipment stored on the rack. Its swiveling, locking
casters make the rack easy to move and secure as needed.

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Chapter 3: Assembly Instructions
3.2 RM215A Assembly Instructions
Tool List
Item Number Tool Description
113-mm open-end wrench
213-mm socket and ratchet
Parts List
Item Number Quantity Part Description
1 1 4-post base plate
2 2 11U rack top
3 2 swivel caster
4 2swivel, locking caster
5 28 M8 x 16-mm hex-head machine screw
6 28 M8 hex nut
7 56 M8 flat washer
8 25 M6 cage nut (not shown in exploded view)
9 25 M6 x 12-mm pan-head machine screw (not shown in exploded view)

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Chapter 3: Assembly Instructions
RM215A Exploded View
Figure 3-5. RM215A exploded view.

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Chapter 3: Assembly Instructions
Assembling the RM215A
STEP 1: Place one 11U rack top (#2 in Figure 3-5) on one side of the 4-post base plate (#1 in Figure 3-5) so that all six holes align
with the holes in the base plate.
Figure 3-6. RM215A assembly, Step 1.

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Chapter 3: Assembly Instructions
STEP 2: Bolt the 11U rack top (#2 in Figure 3-5) to the 4-post base plate (#1 in Figure 3-5) using (6) M8 x 16-mm hex-head
machine screws (#5 in Figure 3-5), (6) M8 hex nuts (#6 in Figure 3-5), and (12) M8 flat washers (#7 in Figure 3-5). Do not tighten
the bolts until all six hex head screws are inserted through their appropriate holes.
Figure 3-7. RM215A assembly, Step 2.
STEP 3: Tighten down all bolts holding the hex nut (#6 in Figure 3-5) with the open-end wrench (#1 in Tool List) and tighten the
bolt head with the socket wrench (#2 in Tool List).

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Chapter 3: Assembly Instructions
STEP 4: Repeat STEPS 1–3 to attach the second 11U rack top (#2 in Figure 3-5).
Figure 3-8. RM215A assembly, Step 4.
STEP 5: Attach the (2) swivel casters (#3 in Figure 3-5) and (2) swivel, locking casters (#4 in Figure 3-5) to the bottom of the
4-post base plate (#1 in Figure 3-5) using the remaining (16) M8 x 16-mm hex-head machine screws (#5 in Figure 3-5), (16) M8
hex nuts (#6 in Figure 3-5), and (32) M8 flat washers (#7 in Figure 3-5). Locking casters (#4 in Figure 3-5) should be attached on
the same side. Do not attach locking casters on diagonal corners.
Figure 3-9. RM215A assembly, Step 5.