Allied Telesis AT-PWR9 990-001242-00 Dépliant

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613-000750 Rev. B

The AT-PWR9 Power Supply, as shown below, is a DC power supply for the AT-MR12 
Media Conversion Rack-Mount Chassis. The power supply is shipped preinstalled in slot 
A in the rear of the DC version of the AT-MCR12 chassis.

This guide describes how to install the AT-PWR9 Power Supply as an auxiliary power 
supply for the chassis, and how to hot swap a power supply if one fails.

For details on the features and functions of the AT-MCR12 Media Conversion Rack-
Mount Chassis, refer to the following document on our web site, www.alliedtelesis.com:

AT-MCR12 Media Conversion Rack-Mount Chassis Installation Guide 

Make sure that the correct components are included in your package:

One AT-PWR9 Power Supply
This installation guide
Warranty card

If any item is missing or damaged, contact your Allied Telesis sales representative for 
assistance.

The AT-PWR9 Power Supply has one POWER LED as described in the following table.

Before you install the AT-PWR9 Power Supply, review the following safety precautions.

The 

 indicates that a translation of the safety statement is available in a PDF 

document titled Translated Safety Statements on the Allied Telesis website at 
www.alliedtelesis.com.

You can install an AT-PWR9 Power Supply as an auxiliary power supply when the 
AT-MCR12 chassis is operating and installed in a rack. To replace a power supply that has 
failed, refer to “Hot Swapping an AT-PWR9 Power Supply.”
To install an AT-PWR9 Power Supply, perform the following procedure:
1.

Unpack all the items from the shipping container and store the packaging material in 
a safe place. You must use the original shipping package if you need to return the 
unit to Allied Telesis.

2.

Remove the two screws that secure the blank faceplate covering the auxiliary power 
supply slot, as shown below.

3.

Turn the AT-PWR9 Power Supply upside down and slide it into the slot, as shown 
below. 

4.

Press the power supply firmly into the backplane.

5.

Secure the power supply by tightening the captive screws. 

6.

Identify the negative, frame ground, and positive terminals on the terminal block, 
as shown below. 

7.

Before you strip and attach the wires, review the following safety precautions.

Green

The power supply is operating normally.

Off

The power supply is off or has failed.

*613-000750 Rev B*

Warning: Do not work on equipment or cables during periods of lightning activity. 

 E2

Caution: Air vents must not be blocked and must have free access to room 
ambient air for cooling. 

 E6

Warning: Operating Temperature. This product is designed for a maximum 
ambient temperature of 40 degrees C. 

 E7

All Countries: Install product in accordance with local and National Electrical 
Codes. 

 E8

Warning: As a safety precaution, install a circuit breaker with a minimum value of 
15 Amps between the equipment and the DC power source.

Always connect the wires to the LAN equipment first before you connect the wires 
to the circuit breaker. Do not work with HOT feeds to avoid the danger of physical 
injury from electrical shock. Always be sure that the circuit breaker is in the OFF 
position before connecting the wires to the breaker. 

 E9

This system works with positive grounded or negative grounded DC systems. 

 

E13

Warning: For centralized DC power connection, install only in a restricted access 
area. 

 E23

A tray cable is required to connect the power source if the unit is powered by 
centralized DC power. The tray cable must be UL listed Type TC tray cable and 
rated at 600 V and 90 degrees C, with three conductors, minimum 14 AWG. 

 

E24

Warning: Circuit breaker is used as a disconnection device. To de-energize 
equipment, shut down the circuit breaker and then disconnect the input wire. 

 

E38

Warning: The DC input shall be from a secondary source isolated from the mains 
by reinforced insulation.

Positive

Negative

Frame Ground