Panduit CMDRH1-C Open-Access Single Horizontal D-Ring Cable Manager
Overview
The Panduit CMDRH1-C is a 1U single horizontal D-ring from the Open-Access™ cable manager family, sold in a 100-piece pack. At 1.53 inches high and 3 inches deep, each ring provides a low-profile routing point that keeps structured cabling organized along the horizontal run without eating up rack units you need for active equipment. If you're building out or refreshing a network rack or enclosure, this is the component that keeps patch cables from cascading into a tangle between panel rows.
The CMDRH1-C (often searched as CMDRH1 C) is engineered specifically for use with Panduit's horizontal Open-Access managers — the ring snaps into the manager channel rather than floating as a standalone fixture, which keeps cable loads evenly distributed across the manager's full span rather than concentrating stress at a single anchor point.
Key Features
- 1U Form Factor (1.53" H × 1" W): At 38.9 mm tall and 25.4 mm wide, each D-ring fits cleanly within a single rack unit. That matters in high-density panels where every millimeter of vertical clearance affects how many patch cables you can route without blocking airflow or adjacent port access.
- 3-Inch Depth: The 3-inch reach gives cables a proper bend radius for both copper patch leads and fiber jumpers. Forcing a tight bend on a Cat6A or OM4 fiber cable at the panel face is one of the leading causes of intermittent link errors and attenuation — this depth keeps you well clear of that problem.
- Open-Access™ Design: The open ring profile (no lid, no door) means you can add, re-route, or remove individual cables without disturbing the entire bundle. In a live data center or IDF where moves, adds, and changes happen regularly, that's a significant labor saver compared to enclosed lacing guides that require full re-dressing to access a single run.
- Black Finish: Standard black matches the majority of commercial rack and enclosure deployments. Consistent color coding across your cable management hardware makes it easier to identify tiers and zones at a glance during troubleshooting.
- 100-Piece Pack Quantity: Sold in packs of 100, the CMDRH1-C is priced and packaged for full-rack or multi-rack deployments — not single-unit replacement. If you're populating a 42U rack with patch panels on every other U, you'll consume 20–40 rings per rack; a 100-pack covers two to five racks in one order, reducing re-order overhead on larger rollouts.
- RoHS Compliant: Meets RoHS (Restriction of Hazardous Substances) requirements, which matters for projects with government, EU-market, or sustainability mandates. Specifying RoHS-compliant passive infrastructure from the start avoids rework if compliance documentation is requested during project closeout.
Integration & Compatibility
The CMDRH1-C is designed for use with Panduit horizontal Open-Access cable managers. The D-ring slides into the manager's mounting slots and is not intended as a standalone panel-mount fixture — verify your horizontal manager model is Open-Access compatible before ordering. Because the ring profile and mounting geometry are standardized within the Open-Access line, these are straightforward to mix across different manager widths in the same rack when your cable counts vary by row.
For integrators building structured cabling infrastructure to support IP camera systems, access control panels, or PoE switch deployments, consistent D-ring spacing at the patch panel row keeps camera home-run cables and data runs separated and traceable — especially useful in rack builds where security and IT cabling share the same enclosure. Pair with a compatible rack enclosure and a horizontal cable manager to complete the assembly.
What's in the Box
- 100× Panduit CMDRH1-C Open-Access Single Horizontal D-Ring (black, 1U, 3" deep)
Frequently Asked Questions
Q: What horizontal cable managers is the CMDRH1-C compatible with?
A: The CMDRH1-C is designed for use with Panduit horizontal Open-Access cable managers. It is not a standalone panel-mount ring — it requires an Open-Access manager channel to seat correctly.
Q: How many D-rings come in a pack of CMDRH1-C?
A: Each order of the CMDRH1-C includes 100 individual D-rings, making it suitable for full-rack or multi-rack cable management deployments.
Q: What are the dimensions of each CMDRH1-C D-ring?
A: Each ring measures 1.53 inches (38.9 mm) high by 1 inch (25.4 mm) wide, with a 3-inch depth — providing adequate bend radius clearance for copper and fiber patch cables.
Q: Is the CMDRH1-C RoHS compliant?
A: Yes, the CMDRH1-C meets RoHS (Restriction of Hazardous Substances) compliance requirements.
Q: Can the CMDRH1-C be used for fiber optic cable routing?
A: The 3-inch depth supports the minimum bend radius requirements for most fiber optic jumpers. Verify the specific bend radius spec for your fiber type against the 3-inch ring depth before final installation in high-density fiber environments.
The CMDRH1-C is the component that separates a cable plant that looks professional three years after installation from one that doesn't. That 3-inch depth isn't arbitrary — it's there to keep your Cat6A and OM3/OM4 fiber jumpers above their minimum bend radius at the panel face, where most installers cut corners and where most intermittent link errors originate.
Technical Highlights:
- 1.53" (38.9mm) Profile Height: Stays within 1U, so you're not sacrificing active equipment real estate for cable routing. In high-density 1U patch panel rows, this clearance is what lets you maintain port access without re-dressing the entire run.
- Open-Access Ring Geometry: No lid means individual cable moves without full bundle re-dress. On a live rack supporting an IP camera system or access control headend, that's the difference between a 2-minute MAC and a 45-minute re-lacing job.
- 100-Piece Pack: At 20–40 rings per 42U rack depending on panel density, a single 100-pack order covers two to five racks — the right unit of purchase for a structured cabling rollout rather than a break-fix replacement.
Deployment Considerations:
- The CMDRH1-C seats into Panduit Open-Access horizontal manager channels — confirm your manager model is Open-Access compatible before specifying these on a bill of materials. Installing into a non-compatible manager will leave the rings loose or non-functional.
- RoHS compliance is verified for this SKU, which satisfies documentation requirements on government facility projects and EU-destined equipment — capture this at the BOM stage, not during project closeout audits.
The CMDRH1-C is the right call on any structured cabling deployment supporting IP security infrastructure — camera home runs, PoE switch patch fields, or access control panel wiring — where cable plant longevity and MAC efficiency matter more than upfront cost per ring.
