Middle Atlantic MON MT DYN Clmn 3X1 BK - MM3-C-330-BK

Middle Atlantic MM3-C-330-BK 3-Display Dynamic Column Monitor Mount

The Middle Atlantic MM3-C-330-BK is a three-display dynamic column monitor mount engineered for operations centers, security control rooms, and AV integration environments where you need to position multiple screens precisely without sacrificing structural integrity or reconfigurability. At 51.17 inches wide and a combined 60-pound weight capacity, the MM3-C-330-BK handles three full-size commercial displays in a single rigid array — eliminating the piecemeal bracket approach that plagues multi-monitor deployments and complicates cable management.

Overview

Built from aluminum in a black (BK) finish, this MM3 Series column mount from Middle Atlantic's Middle Atlantic AV mounting lineup is designed to integrate directly into rack-adjacent column structures or dedicated mounting columns in multi-display monitor mount configurations. The dynamic articulation gives integrators real flexibility during commissioning — depth adjusts from 2.45 inches to 25.5 inches, letting you dial in the precise screen-to-operator distance without cutting new hardware or shimming brackets. Height adjusts from 11.61 to 31.61 inches on the column, so vertical positioning adapts to the console furniture or room layout rather than forcing the room to adapt to the mount.

Key Features

• Three-Display Capacity in a Single Mount: The MM3-C-330-BK supports exactly three monitors simultaneously, which means one mounting solution, one column interface, one cable bundle — not three independent brackets fighting for column real estate. In a 24/7 security operations center, that consolidation translates directly to a cleaner installation and faster head swaps when displays need replacement.
• 60 lb Combined Weight Capacity: At 60 lbs (27.2 kg) total across all three display positions, the MM3-C-330-BK accommodates most commercial 24–32-inch monitors at roughly 20 lbs per display. Verify individual display weights before specifying — three 27-lb commercial-grade monitors would exceed the limit.
• Adjustable Depth: 2.45 to 25.5 Inches: That 23-inch depth range is the core of the 'dynamic' designation. Pull displays close for tight console ergonomics or extend them out for wider sight-line separation — the adjustment handles both without swapping components. This is the spec that makes the MM3-C-330-BK genuinely useful across different console depths in the same product family.
• Adjustable Height: 11.61 to 31.61 Inches: A 20-inch vertical travel range on the column means you can position the display array from seated eye-level to standing view without tools in the field. In control rooms where operators work alternating sit/stand shifts, this range covers the ergonomic requirement without a motorized lift.
• 51.17-Inch Array Width: At just over 51 inches across, the three-display array fits a standard 55-inch-wide operator console bay with margins on each side for cable routing. Plan your console width to this dimension — it is not a collapsible array.
• Aluminum Construction, Black Finish: Aluminum keeps the mount weight reasonable while maintaining the rigidity needed to hold three displays without flex or drift. The black finish matches standard rack and console infrastructure — no custom paint, no finish mismatch in dark control room environments.
• Mounting Hardware Included: All required mounting hardware ships with the MM3-C-330-BK. For integrators running multi-station deployments, that means consistent hardware kits across stations — no sourcing hardware separately per unit or managing mismatched fastener inventories.
• TAA Non-Compliant: The MM3-C-330-BK is not TAA compliant. If your project has federal procurement requirements under the Trade Agreements Act, confirm with your contracting officer before specifying this model — it will not satisfy TAA line-item requirements without a waiver.

Integration and Compatibility

The MM3-C-330-BK integrates into Middle Atlantic's MM3 Series column mounting ecosystem. When deploying in a security operations center or control room console environment, pair with compatible Middle Atlantic column structures and AV rack furniture from the same product family to ensure column attachment hardware aligns. Display VESA pattern compatibility is determined by the individual arm/bracket components used within the MM3 Series — confirm VESA sizing for your specific monitors against the arm specifications before ordering. The 51.17-inch fixed width of the array means left-to-right spacing between displays is set at the mount level; bezel-to-bezel gap is driven by the display sizes selected, not the mount itself.

Internationally available — the MM3-C-330-BK ships for global deployments where Middle Atlantic products are in distribution. Patents referenced at legrandav.com/patents apply to this product.

Frequently Asked Questions

Q: What is the maximum weight this mount can support across all three displays?

A: The MM3-C-330-BK has a total weight capacity of 60 lbs (27.2 kg) across all three display positions. Plan for roughly 20 lbs per display maximum — verify the weight of each specific monitor model before finalizing your specification.

Q: Is the MM3-C-330-BK TAA compliant for government or federal projects?

A: No. The MM3-C-330-BK is not TAA compliant. Federal or government projects with Trade Agreements Act requirements should confirm whether a waiver applies or identify a TAA-compliant alternative in the Middle Atlantic lineup before specifying this model.

Q: How much does the depth adjust on this mount?

A: Depth adjusts from 2.45 inches to 25.5 inches — a range of approximately 23 inches. This allows you to position displays close to the column for compact console configurations or extend them significantly for larger sight-line distances without swapping components.

Q: Does the MM3-C-330-BK ship with mounting hardware?

A: Yes. Mounting hardware is included with the MM3-C-330-BK. No separate hardware kit is required for standard installation.

Q: What is the total width of the three-display array?

A: The MM3-C-330-BK spans 51.17 inches (130 cm) wide across the full three-display array. Account for this fixed width when planning console bay dimensions — it does not collapse or contract.

Q: What material is the MM3-C-330-BK constructed from?

A: The primary structure is aluminum with a black finish. Aluminum provides a good strength-to-weight ratio for a three-display commercial mount, keeping the mount itself from contributing significantly to the 60 lb capacity load.

Karl Wilson

The MM3-C-330-BK is one of those mounts that earns its place specifically in control room builds where the integrator has actual column infrastructure to attach to — the dynamic depth adjustment from 2.45 to 25.5 inches is what sets it apart from fixed-position triple-display brackets that lock you into a single ergonomic position during rough-in and leave the end user stuck with whatever the installer picked on day one.

Technical Highlights:

• 60 lb Weight Capacity: Sufficient for three mid-size commercial displays, but tight if you're specifying 32-inch monitors in the 22–25 lb range each — run the math per-display, not just in aggregate, before signing off on the spec.
• 23-Inch Depth Travel (2.45–25.5 in): Gives real ergonomic flexibility during commissioning and post-install. In sit/stand console environments, this range lets operators pull screens in or push them back without mechanical tools — a genuine quality-of-life spec for 24/7 operations staff.
• 51.17-Inch Fixed Array Width: This is the number to put in your console drawings first. At just over 51 inches, it fits a standard 55-inch bay with a few inches of margin, but it is not adjustable — so console layout must account for this dimension before the mount ships.

Deployment Considerations:

• Confirm column attachment hardware compatibility with your specific Middle Atlantic column structure before ordering — the MM3-C-330-BK integrates into the MM3 Series ecosystem, and mismatched column interfaces require additional adapters that are not included.
• TAA non-compliance is a hard stop for many government and DoD contracts — flag this early in the procurement process rather than at the submittal stage.

Best fit: a security operations center or network operations center with dedicated Middle Atlantic column console infrastructure, three-display operator stations, and a sit/stand ergonomic requirement — where the adjustable depth and height range justify the MM3 Series over simpler fixed-position alternatives.