QFX5241-64OD and QFX5241-64QD Power System

QFX5240-PWR-AC-AO—Two redundant AC power supply units (PSUs) power the AC variant of QFX5241-64OD and QFX5241-64QD switches (with 1 + 1 redundancy). Each QFX5240-PWR-AC-AO PSU provides a maximum output of 3000 W. The PSU modules support airflow out (AFO) cooling, also known as front-to-back or ports-to FRUs airflow. The PSUs are fully redundant and perform load sharing after you install and power on the second PSU. The AC PSUs are hot-removable and hot-insertable field-replaceable units (FRUs). That is, you can remove and replace the PSUs without powering off the switch or disrupting the functioning of the switch.

QFX5241-PWR-DC-AO—Two redundant DC PSUs power the DC variant of QFX5241-64OD and QFX5241-64QD switches (with 1 + 1 redundancy). Each QFX5241-PWR-DC-AO PSU provides a maximum output power of 3000 W. The PSU modules support airflow out (AFO) cooling, also known as front-to-back or ports-to FRUs airflow. The PSUs are fully redundant and perform load sharing after you install and power on the second PSU. The DC PSUs are hot-removable and hot-insertable field-replaceable units (FRUs). That is, you can remove and replace the PSUs without powering off the switch or disrupting the functioning of the switch.

The PSUs for the QFX5241-64OD and QFX5241-64QD switches are located in the FRU panel at the rear of the chassis.

Figure 1: QFX5241-64OD and QFX5241-64QD AC FRU Panel Rear view of a server with two power supply units and drive bays with handles for cooling airflow.

Rear view of a server with two power supply units and drive bays with handles for cooling airflow.

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Power supply units (PSUs)

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Fan modules

Figure 2: QFX5241-64OD and QFX5241-64QD DC FRU Panel

QFX5241-64OD and QFX5241-64QD AC Power Supply Unit Description

Each 3000-W AC power supply unit (PSU) has a single AC input and provides 12 V of output voltage for an AC input current rating of 16 A. The maximum output power of the PSU is 2.8 kilowatt (kW) for the input voltage range of 200 VAC through 215 VAC and 3 kW for the input voltage range of 215 VAC through 240 VAC.

Note:

At the output power and input voltages provided, you can maintain the input current of the switch within the rated limits.

Table 1: AC Power Specifications for QFX5241-64OD and QFX5241-64QD Switches
Item	Specifications
AC input voltage	Input voltage range: 200 V through 240 V.
AC input current rating	16 A
Output voltage (DC)	12 V
Maximum power output	3000 W (for input voltage of 215 VAC through 240 VAC) 2800 W (for input voltage of 200 VAC through 214 VAC)

Figure 3: AC Power Supply Unit Technical drawing of a power supply unit with labeled components: connector, mounting holes, airflow vent, fan, and latch or handle. Hot-swappable design.

Technical drawing of a power supply unit with labeled components: connector, mounting holes, airflow vent, fan, and latch or handle. Hot-swappable design.

1 — Power connector	4 — Handle
2 — PSU LED	5 — Velcro strap for cable management
3 — Ejection lever

To replace a PSU, see Maintain the QFX5241-64OD and QFX5241-64QD Power System.

AC Power Cord Specifications

We ship detachable AC power cords with the chassis if you include the power cords in your order.

Note:

In North America, AC power cords must not exceed 14.75 feet (approximately 4.5 meters) in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52, and Canadian Electrical Code (CEC) Section 4-010(3). The cords that can be ordered for the QFX Series switches are in compliance.

Table 2 lists AC power cord specifications provided for each country or region.

Table 2: AC Power Cord Specifications
Country/Region	Electrical Specifications	Plug Standards	Juniper Model Number
US/China/Europe	250 VAC, 16 A, 50 Hz	Straight,C20 Plug (EN 60320) to C19 Connector (EN 60320)-	CBL-PWR-C19-C20-2M

QFX5241-64OD and QFX5241-64QD AC Power Supply Unit LED

Each QFX5241-64OD and QFX5241-64QD switch PSU has a single LED on the module faceplate to indicate the power status.

Figure 4: QFX5241-64OD and QFX5241-64QD AC PSU LED Location Technical drawing of device rear panel with circular fan on left, three-prong power socket on right, labeled g051584, circled 1.

Technical drawing of device rear panel with circular fan on left, three-prong power socket on right, labeled g051584, circled 1.

AC PSU LED

The AC PSU uses an amber and green bicolor LED to indicate the operating state.

Table 3: QFX5241-64OD and QFX5241-64QD AC PSU LED Color and State
LED Color and State	Description
Off	The PSU is not receiving AC power.
Solid green	The PSU is on and functioning properly.
Blinking green (1 second on, 1 second off, 0.5 Hz)	The PSU is in standby state.
Blinking green (0.25 second on, 0.25 second off, 2 Hz)	The PSU is in redundant or offline mode.
Solid amber	Standby mode with overtemperature protection (OTP) The PSU shuts down because of a critical event such as high temperature, high power, high current, or fan failure.
	Any of the following faults detected at 12 V: Overvoltage Protection (OVP) Undervoltage Protection (UVP) Overcurrent Protection (OCP) Shortcircuit Protection (SCP) Overtemperature Protection (OTP)
	The PSU fan stops working for more than 15 seconds.

QFX5241-64OD and QFX5241-64QD DC Power Supply Unit Description

The QFX5241-64OD and QFX5241-64QD DC power supply units (PSUs) are hot-removable and hot-insertable FRUs with redundancy (1 + 1). Each PSU has a single DC input and provides 12 V of output voltage to the system. The output power of the QFX5241-64OD and QFX5241-64QD DC PSU is 3 KW for the input voltage range of –48 V to –60 V.

Table 4: DC Power Specifications for QFX5241-64OD and QFX5241-64QD Switches
Item	Specifications
DC input voltage	Input voltage range: –48 V through –60 V.
Output voltage (DC to DC)	12 V
Input current (for the maximum power output of 3 kW)	80 A (maximum per PSU)
Maximum power output	3000 W

Figure 5: QFX5241-64OD and QFX5241-64QD DC Power Supply Unit

Handle
Power connector
Ejection lever
PSU LED

DC Power Cord Specifications

We ship detachable DC power cords with the chassis if you include the power cords in your order. DC power cables must meet the specifications required by the local code, laws, and standards. The wire insulation is color coded. The green wire serves as the ground, the black wire acts as the line, and the white wire for neutral connection. The wires are labeled (+) and (–) to indicate their polarity.

The M-CRPS power cords for QFX5241-64OD and QFX5241-64QD DC PSUs are designed to operate at a temperature range of –40 °F (–40 °C) through 221 °F (105 °C). The connectors of the DC PSU power cords support wire sizes of 8 AWG to 12 AWG. The power cord employs a low-profile pull-tab latch to secure the connection with the DC PSU.

CAUTION:

You must ensure that power connections maintain the proper polarity.

Warning:

For field-wiring connections, use copper conductors only.

Make sure that DC power cables do not block access to the switch components or lie on the ground where people can trip on them.

QFX5241-64OD and QFX5241-64QD DC Power Supply Unit LED

Each QFX5241-64OD and QFX5241-64QD DC power supply unit (PSU) has a bicolor status LED on the PSU faceplate.

Figure 6: QFX5241-64OD and QFX5241-64QD DC PSU LED Status

DC PSU LED

The DC PSU uses an amber and green bicolor LED to indicate the operating state.

Table 5: QFX5241-64OD and QFX5241-64QD DC PSU LED Color and State
LED Color and State	Description
Off	The PSU is not receiving DC power.
Solid green	The PSU is on and functioning properly.
Blinking green (1 second on, 1 second off, 0.5 Hz)	The PSU is in standby state.
Blinking green (0.25 second on, 0.25 second off, 2 Hz)	The PSU is in redundant or offline mode.
Yellow	Standby mode with overtemperature protection (OTP) The PSU shuts down because of a critical event such as high temperature, high power, high current, or fan failure.
	Any of the following faults detected at 12 V: Overvoltage protection (OVP) Undervoltage protection (UVP) Overcurrent protection (OCP) Shortcircuit protection (SCP) Overtemperature protection (OTP)
	The PSU fan stops working for more than 15 seconds.

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