Vertiv GL24WMCMS-B-SC-00-CM 12U Wall-Mount Network Enclosure
Overview
The Vertiv GL24WMCMS-B-SC-00-CM is a 12U, 24"-wide wall-mount enclosure in Black, configured with a SEAL Combo access control lock and integrated cable management — a purpose-built solution for small network closets, IDF rooms, access control head-end locations, and distributed surveillance equipment installations where a full floor-standing rack is neither practical nor justified. Part of Vertiv's Vertiv wall-mount enclosure line, the GL series offers a structured option matrix across height (12U, 19U, 25U), door styles, access control tiers, airflow, and cable management — so you configure exactly what the site requires rather than compromising on a one-size-fits-all box.
The GL24WMCMS-B-SC-00-CM (often searched as GL24WMCMS B SC 00 CM) ships in the 12U configuration at 24" wide, designed to accept standard 19" rack equipment while the enclosure's own footprint stays compact enough for wall mounting in tight IDF or head-end spaces. If you're deploying security cameras with a local NVR, PoE switch, and patch panel in a single closet, this enclosure keeps that stack organized, secured, and serviceable without the floor space a full rack demands.
Key Features
- 12U Capacity at 24" Width: Holds up to 12U of standard 19" rack equipment — enough for a PoE switch, 8- or 16-channel NVR, patch panel, and a PDU in a single installation. The 24"-wide form factor keeps the wall footprint manageable in hallway closets and IDF spaces where every inch of wall real estate matters.
- SEAL Combo Access Control: The SEAL Combo lock provides key-free combination access — no key to lose, no key cylinder to pick or bump. For multi-technician sites where several people need access without issuing and tracking physical keys, a combination lock is a straightforward operational win. The GL series also offers Swing Handle (basic key) and SEAL Electronic (programmable electronic lock) on the same chassis if your access policy requires a different credential type.
- Integrated Cable Management: This configuration includes the Cable Bar/Clear cable management option, which routes patch cables and power cords through defined pathways rather than leaving them loose inside the enclosure. Clean cable runs mean faster troubleshooting, reduced strain on RJ-45 and fiber connectors, and easier additions or moves when the installation grows.
- Multiple Door Options on the GL Platform: The GL series supports Plexi (transparent — you can read LED status indicators without opening the door), Mesh (passive ventilation for heat-generating equipment), and Solid doors. This specific configuration's door style should be confirmed against the full part number matrix on the Vertiv configurator; select the door type that matches your airflow and visual-access requirements before ordering.
- No Active Airflow (Passive Cooling): The -00- position in the part number indicates no fan kit in this configuration. Passive cooling is appropriate for lightly loaded enclosures — a PoE switch and NVR in a conditioned or ventilated room typically won't require forced air. If you're running equipment with high sustained thermal output in an unconditioned space, the GL series supports a fan option; select that configuration instead to avoid heat-related reliability issues.
- Black Finish (-B-): The Black color option integrates cleanly into typical IT environments and server rooms. The GL series also offers Winter White for installations where enclosures are visible in office or retail spaces and aesthetics factor into the specification.
- Configurable Across Three Heights: The GL platform scales to 24" (12U), 36" (19U), and 48" (25U) — all sharing the same access control, door, airflow, and cable management options. If the 12U capacity in the GL24WMCMS-B-SC-00-CM turns out to be tight for your equipment list, you can step up to the 19U or 25U variant without changing any other element of the specification.
Integration & Compatibility
The GL24WMCMS-B-SC-00-CM accepts standard PoE network switches, NVRs, patch panels, and PDUs on a 19" rail system. When planning equipment load, account for the passive cooling configuration — calculate the total BTU output of all installed equipment against the room's ambient temperature and ventilation to confirm passive airflow is sufficient before finalizing the build. For structured cabling deployments, the cable management provisions integrate with standard horizontal and vertical cable management accessories. Pair with a UPS or power conditioning unit appropriate to the equipment load to protect against power events in remote or utility closets where power quality may be inconsistent.
Frequently Asked Questions
Q: What rack unit capacity does the GL24WMCMS-B-SC-00-CM provide?
A: This configuration provides 12U of usable rack space at 24" enclosure width, accommodating standard 19" rack-mount equipment.
Q: What type of lock does the GL24WMCMS-B-SC-00-CM use?
A: It ships with a SEAL Combo combination lock — key-free access via a combination code. The GL series also supports Swing Handle (keyed) and SEAL Electronic (electronic programmable) lock options on the same platform if your site requires a different access control method.
Q: Does the GL24WMCMS-B-SC-00-CM include active cooling (fans)?
A: No. The -00- segment of this part number indicates the passive/no-fan airflow configuration. For heat-sensitive or heavily loaded installations, Vertiv offers a fan-equipped variant in the GL series.
Q: Can the GL24WMCMS-B-SC-00-CM be upgraded to a larger capacity?
A: The GL platform is available in 12U (24"), 19U (36"), and 25U (48") heights. If your equipment list exceeds 12U, specify the larger variant at time of order — the access control, cable management, and color options carry across all three sizes.
Q: What color is the GL24WMCMS-B-SC-00-CM?
A: Black, as indicated by the -B- segment of the part number. A Winter White option is available on the GL platform for installations where enclosure visibility in the space is a consideration.
I spec the GL24WMCMS-B-SC-00-CM regularly for distributed surveillance and access control head-end closets where the equipment list tops out around 8-10U — a PoE switch, compact NVR, and a patch panel — and where a full floor rack would be overkill. The SEAL Combo lock is the right call for multi-tech sites: no key management headache, and the combination can be changed without calling a locksmith if staff turns over.
Technical Highlights:
- SEAL Combo Lock: Combination-based access eliminates key issuance and tracking overhead — meaningful on distributed deployments with 20+ remote closet locations where physical key logistics become a real operational burden.
- Passive Cooling (-00- config): No fan means no moving parts to fail and no noise — appropriate for a lightly loaded IDF or surveillance closet in a conditioned building. Saves you the service call to replace a failed fan in a remote location.
- Cable Management Included: The Cable Bar/Clear routing provisions keep patch and power runs organized inside a 12U box that fills up fast. In my experience, the installations that skip cable management in small enclosures pay for it the first time they need to swap a switch port under pressure.
Deployment Considerations:
- Confirm wall-stud or backing-plate load capacity before mounting — a fully loaded 12U enclosure with a switch and NVR is heavier than the wall framing in many commercial interiors is rated for without a backing plate or dedicated wall blocking.
- The passive cooling configuration is only appropriate if the room maintains reasonable ambient temperature. If this closet doubles as a janitor's room or has no HVAC, specify the fan variant instead — heat is the leading cause of premature switch and NVR failure in remote closets.
Best fit: distributed multi-site deployments (retail chains, school campuses, industrial facilities) where each node needs a standardized, lockable, cable-managed 12U enclosure that a field technician can service quickly without specialized tools or key access procedures.
