The Dell CRMRT is a 550 W reverse-airflow AC power supply for the PowerSwitch N3200-ON and N2200-ON campus series, drawing air in at the port face and exhausting it at the PSU face. It is a hot-swappable field-replaceable unit and it is interchangeable with Dell part number CRMCT.
Matching the airflow to the rack
Dell builds these switches in normal- and reverse-airflow variants, and the power supply carries the direction. Reverse airflow - marked PSU-IO in Dell's part descriptions - exhausts at the power-supply end, which is the correct direction for a switch mounted with its ports toward the cold aisle. The normal-airflow supply for the same platform is part number 097PT and is marked IO-PSU.
Everything in the chassis has to agree. Pair this supply with the reverse-airflow fan module (Dell 8YXH5) and the whole switch moves air in one direction. Mix directions and the switch recirculates its own exhaust.
Redundancy on a campus switch
N3200 and N2200 switches take two supplies. On an access-layer switch feeding phones, access points and cameras over PoE, losing the only power supply takes a floor of the building offline - which is a rather different incident from losing a spine link. The second supply is cheap insurance, and a hot-swappable design means adding it later costs no downtime.
Which switches take it
N2224X-ON, N2248X-ON, N3224T-ON, N3224F-ON, N3248TE-ON and N3248X-ON.
Condition
Refurbished, tested and covered with warranty.
Related models
Specifications
| Output | 550 W AC |
|---|---|
| Airflow direction | Reverse airflow (port-to-PSU, [PSU-IO]) |
| Platform | Dell PowerSwitch N3200-ON / N2200-ON series |
| Redundancy | Switches take two supplies; both must share the same airflow direction |
| Serviceability | Hot-swappable field-replaceable unit |
| Interchangeable Dell part numbers | CRMCT |
| Normal-airflow counterpart | 097PT |
| Shipping weight | 2.0 lbs |
