Connectrix Cisco MDS: MDS switch 9396s power supply "DS-CAC-1200W-E" replaced with "DS-CAC-1200W"

Per Cisco, the DS-CAC-1200W-E PSU has been discontinued and is not orderable through logistics. It is not going to be available or sourced.
The part is automatically substituted for a DS-CAC-1200W, which is the bi-directional version.

Details about the PSU and the Part Number:
To verify the direction of airflow in fan modules, the following colors are denoted on the fan modules:
Red—Port-side intake airflow (DS-C96S-FAN-I)
Blue—Port-side exhaust airflow (DS-C96S-FAN-E)

Fan modules which support port-side intake airflow can be used with a new Power Supply Unit, DS-CAC-1200W, only. If an older PSU (DS-CAC-1200W-E) is used with the fan modules which support port-side intake airflow, a warning is issued on the software after which the switch shuts down in 10 minutes.

If a chassis has two different fan modules, one supporting port-side exhaust airflow and the other supporting port-side intake airflow, the switch is immediately powered down.

Power Supplies
The Cisco MDS 9396S Multilayer Fabric switch supports two hot swappable AC power supply units (PSUs). Each unit has a power receptacle and a status LED on the faceplate, and a handle for inserting and removing the unit from the chassis. If a PSU or AC supply (in grid redundant mode) failure, the system continues to run. PSUs are hot swappable and can be individually replaced without shutting down the system. Procedures for installing and removing PSUs are detailed in the Removing and Installing AC Power Supplies section.

A new high voltage AC and DC PSU (DS-CAC-1200W) which supports bi-directional airflow, port-side exhaust airflow, and port-side intake airflow, of fan modules has been introduced in Cisco MDS NX-OS Releases 6.2(x) starting from Cisco MDS NX-OS Release 6.2(17) and Cisco MDS NX-OS Releases 7.3(x) starting from Cisco MDS NX-OS Release 7.3(1)D1(1).

To verify the direction of airflow in PSUs, the following colors are denoted on the PSUs:

• White (DS-CAC-1200W)—Represents bi-directional airflow. Port-side intake airflow or port-side exhaust airflow depending on the type of airflow of the system fan modules. This PSU automatically configures itself to work in port-side exhaust airflow mode if the switch has Blue system fan modules installed. Similarly, the PSU automatically configures itself to work in port-side intake airflow mode if the switch has Red fan modules installed. For more information about the direction of airflow in fan modules, see the Fan Modules section.

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• Blue (DS-CAC-1200W-E)—Represents port-side exhaust airflow. This power supply can only be used with the port-side exhaust airflow fan (DS-C96S-FAN-E).

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The substitute part 'DS-CAC-1200W' can be used to replace the PSU on the Connectrix MDS-9396S switch, instead of the 'DS-CAC-1200W-E.'
To facilitate this replacement, the ‘CAB-HVAC-C14-2M' HVAC Power Cable (2 meters) will be required. The logistics team sends this cable along with the PSU part.

Mixing of 1200W-E and 1200W - bi-directional PSUs should be allowed in the same chassis. We have tested this and these two PIDs can co-exist in the same chassis.

Reference Link: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/hw/9396S/installation/guide/b_mds9396_hardware_install_guide/overview.html#concept_03598C3DCDE748CEA09FEAC644D71E63