# RK-420B-CW

# Quiet Safety 4U Rackmount Industrial Chassis

# Supports 15-slot Backplane and 7-slot Motherboard

# Features

• EIA RS-310C 19” rack mount standard
• Supports up to 15-slot backplane and ATX, Micro-ATX, Mini-ITX motherboards.
• Two 5.25” external, one 3.5” external and one 3.5” internal drive bay
• Two USB ports inside front I/O
• Replaceable, easy-to-clean air filter
• Low noise 12cm PWM controlled (full Loading 45db)

![Exterior view of a white industrial device labeled 'ADLINK' with ventilation grilles and a black triangular cutout (no readable text beyond branding)](.rk-420b-cw-20250626/f86522cc8ad173b344aae774f5b0cba8dc0bf8515b572dbf4ddf4ae472782716.jpg)

Ordering Information

<table><tr><td>Model Number</td><td>Color</td><td>Description</td></tr><tr><td>RK-620B-CW</td><td>White</td><td>Hand Screw Quiet 4U Rack Mounted Industrial ChassisSupports 15-slot Backplane and 7-slot Motherboard</td></tr><tr><td>7-slot rear window</td><td>-</td><td>Changeable 7-slot rear window for the chassis</td></tr></table>

Power Supply Options

<table><tr><td rowspan="2">Model Number</td><td rowspan="2">Watt</td><td colspan="10">Output (Max.)</td></tr><tr><td>Input Range</td><td>+3.3 V</td><td>+5 V</td><td>+12 V1</td><td>+12 V2</td><td>+12 V3</td><td>+12 V4</td><td>-12 V</td><td>+5 Vsb</td><td>-5 V</td></tr><tr><td>APS950XA-EPS12</td><td>500W</td><td>Universal</td><td>19 A</td><td>16 A</td><td>17 A</td><td>17 A</td><td>N/A</td><td>N/A</td><td>0.3 A</td><td>2.5 A</td><td>0.3 A</td></tr><tr><td>APS960XA-EPS12</td><td>600W</td><td>Universal</td><td>19 A</td><td>16 A</td><td>17 A</td><td>17 A</td><td>N/A</td><td>N/A</td><td>0.3 A</td><td>2.5 A</td><td>0.3 A</td></tr><tr><td>APS750W, ATX</td><td>750W</td><td>Universal</td><td>19 A</td><td>16 A</td><td>17 A</td><td>17 A</td><td>N/A</td><td>N/A</td><td>0.3 A</td><td>2.5 A</td><td>0.3 A</td></tr><tr><td>APS1200W, ATX</td><td>1200W</td><td>Universal</td><td>25 A</td><td>25 A</td><td>16 A</td><td>16 A</td><td>16 A</td><td>16 A</td><td>0.5 A</td><td>4.0 A</td><td>0.5 A</td></tr><tr><td>APS2000W ATX</td><td>2000W</td><td>Universal</td><td>25 A</td><td>25 A</td><td>16 A</td><td>16 A</td><td>16 A</td><td>16 A</td><td>0.5 A</td><td>4.0 A</td><td>0.5 A</td></tr></table>

Specifications

<table><tr><td>Model</td><td>RK-420B-CW</td></tr><tr><td>Dimensions (W x H x D)</td><td>16.8 in x 7 in x 17.4 in (427 mm x 177 mm x 447.9 mm)</td></tr><tr><td>Drive Bays</td><td>Two 5.25&quot; and one 3.5&quot; front externalOne 3.5&quot; internal</td></tr><tr><td>Color</td><td>White</td></tr><tr><td>Cooling Fans</td><td>120 mm x 120 mm x 25 mm PWM ball bearing fan(103 CFM)System fan speed would change refer to chassis thermal sensor, or CPU temperature</td></tr><tr><td>Front Panel</td><td>Front door with lock, two USB connectorsLEDs: HDD active and system powerSystem reset switch and ATX power switchTwo USB type A connectors</td></tr><tr><td>Motherboard</td><td>15-slot passive backplaneMini-ITX, microATX, or ATX industrial motherboard</td></tr><tr><td>Power Supply</td><td>PS2 form factor ATX power supply</td></tr><tr><td>Carton Size (W x H x D)</td><td>25 in x 13.8 in x 23.4 in (635 mm x 350 mm x 595 mm)</td></tr><tr><td>Weight</td><td>Net 12 kg (26.4 lbs)</td></tr></table>

Dimensions

![This image is a technical engineering drawing displaying five orthographic projections of a computer chassis or server case with specific dimensions.\n\n**Top View (Top Center):**\nShows the top surface with a grid of slots.\n*   Horizontal dimension: **127.00 + 0.5**\n*   Vertical dimension: **172.70 + 0.5**\n*   Circle label: **5**\n*   Small dimension below the view: **26.84 + 0.5**\n\n**Front View (Far Left):**\nShows the front panel profile.\n*   Vertical dimension: **343.10 + 1.2**\n*   Circle label: **1**\n\n**Rear View (Center):**\nShows the back panel with mounting holes.\n*   Left vertical dimension: **272.10 + 0.5**\n*   Right vertical dimension: **165.67 + 0.5**\n*   Circle label: **4**\n\n**Side View (Center Right):**\nShows the side profile.\n*   Top dimension: **86.5**\n*   Middle dimensions: **92**, **92**\n*   Bottom dimension: **120**\n\n**Right-Side Views (Far Right):**\nTwo views stacked vertically showing front and bottom panels.\n*   **Top View:** Features the logo 'ADLINK'.\n    *   Horizontal dimensions: **482.6**, **465.6**\n    *   Vertical dimensions: **101.6**, **177**\n*   **Bottom View:** Shows the bottom plate with vents and ports (no text or dimensions listed).](.rk-420b-cw-20250626/e5411be34e93cd065a3c967729c26b7e7cb8f15b34f0c11395f3d6c0898f811d.jpg)
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