How to Connect the DC Adapter for the ASA 5506H-X?
Cisco ASA 5506-X, ASA 5506W-X, and ASA 5506H-X Hardware Installation Guide
How to maintain and upgrade your ASA firewalls, such as the popular ASA 5506-X, ASA 5506W-X and ASA 5506H-X? In this article we will share the two guides for Cisco ASA 5506-X, ASA 5506W-X and ASA 5506H-X, which contain the following sections:
- Connect the DC Adapter for the 5506H-X
- Install the Adjustable Power Supply Retainer
How to Connect the DC Adapter for the ASA 5506H-X?
You can order an optional DC power supply that supplies 24V DC (part number PWR2-20W-24VDC) or 20W 20-60V DC (part number PWR2-22W-20-60VDC).
Warning:
1. This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than 36 VDC, 5A. Statement 1005
2. This product requires short-circuit (overcurrent) protection to be provided as part of the building installation. Install only in accordance with national and local wiring regulations.
3. The device is designed to work with TN power systems.
To connect the DC power on your 5506H-X, follow these steps:
Step1: Connect the black and white lead wires to a 12 VDC source. The black lead is negative or ground and the white lead is positive. The output cable is 1.3 meters and the input cable is 1 meter in length.
Figure1. DC Power Adapter

1 | Black wire (negative) | 2 | White wire (positive) |
3 | Adapter |
Step2: Plug the adapter cord into the ASA.
Note: The power adapters have 18 AWG wires for the input connection. Tinned bare wires are used for the input connection because there is no standard established for connector type. Screw terminal blocks are most often used.
Step3: Power on the ASA and check that it has power. See LEDs for information on the power LED.
How to Install the Adjustable Power Supply Retainer?
You can install an adjustable power supply retainer for the Delta and LiteOn power supplies in the rack-mount tray. The bracket kit contains the bracket, 2 M3 screws, and washers. The following figure shows the adjustable retainer.
Figure2. ASA Bracket Assembly

1 | Two screws to loosen to change from high to low bracket | 2 | Two captive screws to attach to rack-mount tray |
Step1: Slide the rack-mount shelf containing the ASA(s) out of the rack.
Step2: At the back of the rack-mount shelf behind the power supplies, install the adjustable retainer.
The Delta power supply uses the bracket extended to its tallest configuration. This configuration has item 1 shifted to the bottom of the slot on the bracket over the power supply. The LiteOn power supply uses the bracket extended to its shortest configuration. This configuration has item 1 shifted to the top of the slot on the bracket over the power supply.
- Install the bracket over the power supply and screw the 2 bottom M3 captive screws (item 2 in the figure above) on each side of the bottom of the bracket into the rack-mount tray.
The following figure shows the installed power supply retainer.
Figure3. Installed Power Supply Retainer

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