Product Overview
The Ergotron 45-489-224 LX Desk Dual Direct Arm is a dual-monitor mounting system finished in matte black. It supports two compatible LCD monitors on a shared desk-mounted structure, providing adjustable screen positioning while freeing up workspace.
The system combines an articulated arm, extension, dual-monitor crossbar, two monitor pivots, and a desk clamp. Ergotron's Constant Force motion technology allows users to reposition the displays with a light touch. The compact movement range also allows the monitors to be folded aside when additional desk space is needed.
Monitor Positioning and Adjustment
The LX Desk Dual Direct Arm provides independent adjustment of the two monitors, allowing users to change their viewing angles and screen orientations. The articulated structure extends away from the desk mounting point and folds back when the displays are not needed.
- Height adjustment: Up to 13 inches (33 cm), depending on the combined monitor weight.
- Tilt: 13 degrees backward and 17 degrees forward.
- Pan: 360-degree horizontal movement.
- Screen rotation: 360-degree rotation with portrait/landscape positioning and lockout.
- Extension: Up to 24.3 inches (61.7 cm) of extended reach.
Monitor Compatibility
This mounting system supports two LCD monitors, typically up to 25 inches each. Each monitor must weigh between 2 and 11 lb (0.9–5 kg), and the combined monitor weight must remain within the 4–22 lb (1.8–10 kg) system capacity.
The mount supports VESA MIS-D mounting patterns of 75 x 75 mm and 100 x 100 mm. Monitor dimensions and depth also affect compatibility. Displays wider than the recommended limits may interfere with one another or restrict the available movement.
Desk Mounting
The included two-piece desk clamp attaches to a compatible desk edge between 0.4 and 2.4 inches (10–60 mm) thick. The central pole supports the arm and dual-monitor crossbar.
A separate grommet mounting accessory is available for compatible installations through a desk surface. Check the mounting requirements before selecting an alternative installation method.
Cable Management
Integrated cable management routes monitor cables beneath the arm and through the extension. This helps organize display connections and reduces exposed cable runs around the workstation.
Key Features
- Dual-monitor support: Mounts two compatible LCD displays on one desk-mounted system.
- Constant Force technology: Enables convenient screen repositioning with a light touch.
- Independent monitor adjustment: Allows each display to be tilted and rotated for different viewing orientations.
- Compact storage position: The arms fold aside to help reclaim desk space when the monitors are not in use.
- Integrated cable routing: Guides cables beneath the arm and through the extension.
Applications
The LX Desk Dual Direct Arm is suitable for office workstations, administrative desks, programming environments, research workspaces, and other setups requiring two monitors. Its adjustable mounting arrangement helps users position applications and reference material across separate displays while keeping the desk surface more accessible.
DC Supplies Product Note
Check the weight of each monitor separately before installation. Both displays must fall within the supported individual weight range, and the combined weight must not exceed 22 lb (10 kg). The full 13-inch height-adjustment range is available when the combined monitor weight is below 17 lb (7.7 kg); heavier configurations may have a reduced vertical range. Monitor depth greater than 3 inches (7.5 cm) can also reduce capacity.
Technical Specifications
| Brand | Ergotron |
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| Part Number / MPN | 45-489-224 |
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| Product Type | Dual-monitor desk mounting arm |
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| Product Series | LX |
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| Model | LX Desk Dual Direct Arm |
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| Color | Matte black |
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| Supported Displays | 2 LCD monitors |
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| Typical Display Size | Up to 25 inches per monitor |
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| Individual Monitor Weight | 2–11 lb (0.9–5 kg) |
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| Combined Monitor Weight Capacity | 4–22 lb (1.8–10 kg) |
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| Height Adjustment | Up to 13 inches (33 cm), depending on total monitor weight |
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| Tilt Range | 13 degrees backward and 17 degrees forward |
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| Pan | 360 degrees |
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| Screen Rotation | 360 degrees, with portrait/landscape positioning and lockout |
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| Maximum Extended Reach | 24.3 inches (61.7 cm) |
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| VESA Compatibility | MIS-D, 75 x 75 mm and 100 x 100 mm |
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| Mounting Type | Desk-edge clamp |
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| Supported Desk Thickness | 0.4–2.4 inches (10–60 mm) |
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| Motion Technology | Constant Force |
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| Cable Management | Integrated routing beneath the arm and through the extension |
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| Included Components | LX arm, extension, two-piece desk clamp, dual-monitor crossbar, two monitor pivots, 8-inch pole, and monitor mounting hardware |
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| Product Weight | 5.2 kg |
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| GTIN | 00698833073904 |
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| Warranty | 10 years |
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Frequently Asked Questions
1. How many monitors does the Ergotron 45-489-224 support?
This model supports two compatible LCD monitors mounted on a shared dual-monitor crossbar.
2. What is the weight limit for each monitor?
Each monitor must weigh between 2 and 11 lb (0.9–5 kg). The combined weight of both displays must remain within the system's 4–22 lb (1.8–10 kg) capacity.
3. Does the arm support portrait monitor orientation?
Yes. The monitor pivots support 360-degree rotation, allowing compatible displays to be positioned in portrait or landscape orientation.
4. Which VESA mounting patterns are compatible?
The arm supports VESA MIS-D mounting patterns of 75 x 75 mm and 100 x 100 mm. Both monitors should be checked for compatible mounting holes before installation.
5. Does the product include a desk clamp?
Yes. The listed components include a two-piece desk clamp designed for compatible desk edges measuring 0.4–2.4 inches (10–60 mm) thick.
6. Does the monitor weight affect height adjustment?
Yes. The full 13-inch height-adjustment range is available when the combined monitor weight is below 17 lb (7.7 kg). Heavier supported configurations may have a reduced vertical adjustment range.
