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Panel

In this section:

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Tooltip

tip	Use ESD protective device

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systems configured for AC power are equipped with either a single or dual redundant AC power supplies. These are Customer Replaceable Units (CRU). The figure AC Power Supply depicts a dual redundant configuration. The AC Power Supply product code is SBC-5400-PSUAC.

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	AC Power Supply
	AC Power Supply

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1	AC Power Supply

In a dual redundant power supply configuration, the power supplies are hot-swappable meaning that a power supply may be replaced without powering down the

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platform (provided that the redundant power supply is operational).

Note

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Before replacing a power supply in a redundant power supply configuration, verify the status of the redundant power supply. The “POK” LED status must be “solid green”. Removing the power supply when the redundant supply does not show a solid green status, may cause the system to power down. Contact Sonus Customer Support if required.

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1	SBC 5400 AC power supply states

Power Supply Condition	LED Status (Green/Amber)
Standby ON, Main Output OFF, AC Present	Blinking Green
Standby ON, Main Output ON	Solid Green
Main Output OCP, UVP, OVP	Blinking Amber
FAN Fail, OTP, Standby OCP/UVP	Amber

Parts and Tools Required

Electrostatic discharge (ESD) strap
Replacement AC power supply

Note
The chassis is shipped with one power supply, unless a second power supply is added to the order.

Note
To prevent damage from electrostatic discharge, an ESD strap is provided in the accessory kit. See Connecting ESD Wrist Strap to install it.

Replacing a Power Supply

Perform the following procedure to replace a power supply:

Verify the POK green LED of the redundant power supply is lit.
Attach an Electrostatic Discharge wrist strap to the ESD grounding point on the back panel of the chassis, and place the other end around your wrist (see Connecting Electrostatic Discharge Wrist Strap for details).
Disconnect the AC power cable from the AC power supply as shown below.
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1 Disconnecting the AC power cable
Disengage the AC power supply by moving the latch to the left as shown below.
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1 Disengaging the AC Power supply
Pull on the loop handle to slide the AC power supply out of the
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chassis as shown below.
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1 Disengaging the AC Power supply from the SBC 5000 series chassis
Install the replacement AC power supply into the
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chassis by sliding it forward until you hear the latch click in place.
Reconnect the AC power cable, as shown below.
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1 Reconnecting the AC power cable
Observe that the POK green LED on the newly-inserted power supply is solid green.
From the application, ensure that no power supply alarms are generated.