Viking 12in. in. Analog Clock Double Mount - CL-DMA12

Viking Electronics CL-DMA12 Double Mount Housing for 12-Inch Analog Clocks

Overview

The Viking Electronics CL-DMA12 is a double mount housing designed to hold two CL-A12 12-inch analog clocks simultaneously, orienting them perpendicular to a wall or ceiling. That geometry is the whole point: rather than placing two single clocks on opposite walls down a corridor, you install one CL-DMA12 at a central ceiling or wall junction and both faces point down the hallway in opposite directions. The result is clear time visibility from either approach — no blind zones, one conduit run, one installation point. This is a purpose-built accessory within the Viking Electronics CL Series wireless clock line, not a universal bracket. If you're building out a synchronized wireless clock system for a school, healthcare facility, or industrial corridor, the CL-DMA12 is the right bracket to spec alongside your CL-A12 clock pairs.

Key Features

• Dual perpendicular clock mounting: Holds two CL-A12 units at 90° to the mounting surface. In long corridors — think hospital wings, school hallways, warehouse aisles — this single mount point covers both directions simultaneously. You halve the number of installation locations compared to single-face mounts without sacrificing coverage.
• No-glass fiber ABS plastic housing: The enclosure material is ABS plastic without glass fiber reinforcement. That keeps weight down (shipping weight is 4.2 lbs / 1.91 kg for the CL-DMA12) and avoids the brittleness of fiber composites in impact-prone corridor environments. It's not rated for outdoor or wet-location use — this is an interior-grade housing.
• Compact 4.2 lb shipping weight: At 4.2 lbs for the housing alone (CL-A12 clocks ship separately at 2.9 lbs each), the assembly remains manageable for a single-person ceiling installation. Factor in the two CL-A12 units and you're looking at roughly 10 lbs total at the mount point — within standard single-gang electrical box load tolerances in most jurisdictions, but verify your specific ceiling substrate before committing.
• Designed for CL-A12 12-inch analog clocks: The CL-DMA12 (often searched as CL DMA12) is dimensioned specifically for the CL-A12 movement, which measures 7.32″ × 3.46″ × 1.81″. Do not attempt to fit third-party clock movements — the recess geometry is proprietary to the Viking CL Series.
• Part of a wireless synchronized system: The CL-A12 clocks this housing accepts operate on 915–928 MHz frequency-hopping technology with a -103 dBm receiver sensitivity and up to 3,300 ft transmission range from the master transmitter. That means once you mount the CL-DMA12 in a ceiling junction, no data wiring runs to the clock pair — only a single AC power connection for the clocks themselves.
• Operating temperature 0°C to 32°C (32°F to 90°F): The CL-A12 clocks housed within are rated for this range, which covers standard HVAC-conditioned interior spaces. Unheated warehouses, loading docks, or cold storage corridors that drop below freezing will push past the clock module's rated range — choose a different product for those environments.

Integration & Compatibility

The CL-DMA12 is compatible exclusively with the CL-A12 12-inch analog clock from Viking Electronics. It does not accept the CL-D series digital displays or the 16-inch analog variant (for that size, Viking offers the CL-DMA16, which ships at 6.1 lbs). Within a CL Series deployment, the wireless clocks pair to a Viking master clock transmitter operating in the 915–928 MHz ISM band under FCC Part 15. No additional licensing is required for the RF system in the US. If you're wiring into a structured cabling infrastructure or integrating with a building management system, note that the CL Series operates autonomously via RF sync — there is no IP or PoE interface on the analog clock variant. For facilities requiring NTP-synchronized digital displays with network integration, review other products in the synchronized clock systems category.

Frequently Asked Questions

Q: What clocks are compatible with the CL-DMA12?

A: The CL-DMA12 is designed specifically to hold two CL-A12 12-inch analog clocks from Viking Electronics. It is not compatible with the 16-inch analog variant (use CL-DMA16 for that) or with Viking's digital clock displays.

Q: Does the CL-DMA12 include the CL-A12 clocks?

A: No. The CL-DMA12 is the double mount housing only. The CL-A12 clocks must be ordered separately. Budget for two CL-A12 units per CL-DMA12 installation.

Q: Is the CL-DMA12 suitable for outdoor installation?

A: No. The housing is ABS plastic with no environmental ingress rating, and the CL-A12 clocks it holds are rated for interior conditioned spaces only (0°C to 32°C / 32°F to 90°F). Outdoor or wet-location use is not supported.

Q: What RF frequency does the CL Series wireless system use?

A: The CL Series operates on 915–928 MHz frequency-hopping spread spectrum (FHSS) technology. This falls under FCC Part 15 — no site license is required in the US. The system achieves up to 3,300 ft transmission range from the master transmitter.

Q: How heavy is the CL-DMA12 assembly with two CL-A12 clocks installed?

A: The CL-DMA12 housing ships at 4.2 lbs. Each CL-A12 clock ships at 2.9 lbs, so a fully loaded double mount is approximately 10 lbs total. Confirm your ceiling substrate and junction box load rating before installation.

James Everett

The CL-DMA12 solves a real field problem I see constantly on long-corridor installs: integrators spec two single-face clocks on opposite walls, run two separate home-runs back to the RF receiver, and pay for two installation drops where one would do. The double mount approach cuts that to a single ceiling penetration with both CL-A12 faces pointing in opposite directions — visibility in both directions, one power connection, one rough-in location.

Technical Highlights:

• 4.2 lb housing weight: Light enough for a single technician to manage the ceiling rough-in before the clocks are loaded. The two CL-A12 units add roughly 5.8 lbs combined, bringing the fully loaded assembly to approximately 10 lbs — manageable at most ceiling junction points but worth confirming against your substrate spec before you order.
• ABS plastic, no glass fiber: The housing material is a deliberate trade-off — lighter and less brittle at interior temperatures than fiber-reinforced composites, but it means you should not force this into any location that sees impacts, moisture, or temperature swings outside 0°C to 32°C. Interior conditioned corridors only.
• CL-A12 specific fit: The recess is dimensioned for the 7.32″ × 3.46″ × 1.81″ CL-A12 movement geometry. There is no adjustment or adapter — if your project spec calls for a 16-inch face, you need the CL-DMA16 (6.1 lbs shipping) instead. Mixing up the housing and clock size is the most common ordering error on CL Series corridor projects.

Deployment Considerations:

• The CL-A12 clocks operate wirelessly on 915–928 MHz FHSS under FCC Part 15. At the ceiling mount point you need only AC power for the clocks — no data conduit, no Cat6, no PoE infrastructure. That simplifies the rough-in considerably but means your master transmitter placement is critical: the 3,300 ft range spec assumes open-air line of sight, and concrete or CMU walls will cut that materially.
• Verify ceiling load capacity before installation. The combined assembly runs approximately 10 lbs. Standard 4-inch octagon boxes are typically rated for 35–50 lbs in fan-rated configurations, but slab anchors in older tile-grid ceilings may be rated much lower — check your structural drawings, especially in healthcare or historic building retrofits.

The CL-DMA12 is the right spec for K–12 corridors, hospital wings, and long warehouse aisles where a single synchronized clock pair needs to serve foot traffic moving in both directions — and where running separate wall drops for each face would add unnecessary labor cost to the project.