The Generic mounting interface encompasses all other mounting interfaces outside of the ones listed above. Unless indicated to be tool-less, tools are required for installation.
Stab-in Sliding rails require the inner (chassis) rail members must first be attached to the sides of the system and then inserted into the outer (cabinet) members installed in the rack and allow a system to be portion extended out of the rack for service. For systems that are 2U and larger, it is recommended that two people perform this operation. Most stab-in Sliding rails are compatible with CMA and SRB solutions.
Cable management arm (CMA) is a cable management accessory which connects to the rails behind the system. It allows a fully cabled system to be extended out of the rack into a service position.
Strain relief bar (SRB) is a cable management solution, which in most cases, attaches to the back of the rails via the strain relief bar brackets. Cables from the back of the chassis are placed across the top of the SRB and secured by straps.
Dell Technologies rail kits install into two different rack types with various flange hole designs. These rack types are broken down in Table 2 into 4-post and 2-post styles.
4-post rack types contain vertical mounting flanges with either square-hole, unthreaded round-hole, or threaded round-hole designs as part of the rack and rail interface.
2-post rack types generally contain threaded round-hole designs and require users to mount the server in either the front or center mount orientations. Only stab-in static rail designs that support 2-post rack configurations may be installed into a 2-post rack and commonly require additional hardware to secure the rails to the rack.
Square-hole describes a 4-post rack mounting flange type where rails utilize Square holes sized according to EIA-310-D standard for mounting.
Round-hole describes a 4-post rack mounting flange type where rails utilize Unthreaded-Round holes sized according to EIA-310- D standard for mounting.
Threaded-hole describes a 4-post rack mounting flange type where rails utilize Threaded-round holes for mounting. Threaded round holes may require additional hardware for mounting and hardware may vary by thread type. See footnotes in table 2 for specific information on threaded-round hole mounting.
| Rail identifier | Mounting interface | Rail type | Rack types supported | Rail adjustability range (mm) | Rail depth (mm) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4-Post | 2-Post | Square | Round | Threaded | without CMA/SRB | with CMA(SRB) | |||||||||||||
| Square | Round | Thread | Flush | Center | Min | Max | Min | Max | Min | Max | |||||||||
| A20 | Generic Tool-less | Stab-in Sliding h,t | X | X | X | X a | X a | 472 |
757 |
472 | 757 | 472 | 757 | 445 b | 605 (498/520) |
||||
|
a Minor conversion required b With CMA brackets removed | |||||||||||||||||||
Category: accessories-type-rail-kits, dell, dell_accessories, dell_components, rail-kit-type-2-post, rail-kit-type-4-post, rail-type-stab-in-sliding
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Important notes:
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