SRX4120 Chassis

Learn about the components in the SRX4120 chassis.

The SRX4120 chassis is a rigid sheet-metal structure that houses all components of the device.

SRX4120 Specifications

Table 1: Physical Specifications
Specification	Value
Height	1.74 in (4.42 cm)
Width	17.28 in (43.89 cm)
Depth	18.20 in (46.23 cm)
Weight	We ship the SRX4120 with only one power supply unit (PSU). As shipped (one PSU): 17.10 lb (7.6 kg) Fully-loaded with 2 PSUs: 19.12 lb (8.5 kg)

Table 2: Environmental Specifications
Specification	Value
Operating altitude	6000 ft (1828 m)
Operating temperature	32 °F to 104 °F (0 °C to 40 °C)
Storage temperature	-40 °F to 158 °F (-40 °C to 70 °C)
Relative humidity (operating) (non-condensing)	5% through 90%

SRX4120 Front Panel

Figure 1: SRX4120 Front Panel

Table 3: Components on the SRX4120 Front Panel
Callout	Item	Description
1	Ethernet ports	Eight 1/2.5/5/10-Gigabit Ethernet (GbE) MACsec ports for network traffic
2	SFP+ ports	Eight 1/10 GbE SFP+ MACsec ports for network traffic
3	SFP28 ports	Four 1/10/25 GbE SFP28 MACsec ports for network traffic
4	QSFP28	Two 40/100 GbE QSFP28 MACsec ports for network traffic
5	Chassis cluster ports (HA)	Two 1 GbE SFP chassis cluster control CTL ports with MACsec support
6	Management port (MGMT)	1 GbE RJ-45 port
7	USB port	One USB 3.0 Type A port that accepts a USB storage device.
8	Chassis LEDs	Indicate component and system status and troubleshooting information at a glance.
9	Power button	Power button
10	Pull tab	Contains the CLEI code and serial number of the device.
11	RESET	Reset button. To reset the system, press and hold the RESET button for around 250 ms.
12	Console port (CON)	You can connect a laptop to the device for CLI management. The port uses an RJ-45 serial connection and supports the RS-232 (EIA-232) standard.
13	Claim code	You can use the QR code to claim and onboard your device to Juniper Security Director.

SRX4120 Rear Panel

Figure 2: SRX4120 Rear Panel (AC Variant) Technical diagram of a server's rear panel layout with five labeled sections from cooling fans to power supply units.

Technical diagram of a server's rear panel layout with five labeled sections from cooling fans to power supply units.

Table 4: Components on the SRX4120 Rear Panel (AC Variant)
Callout	Item	Description
1	Grounding point	Used to connect the device to earth ground.
2	Fan modules	Four airflow out (AFO) fan modules (3+1 redundancy). Three fan modules are required for proper airflow across the chassis internal components. The fourth fan module provides redundancy.
3	ESD	ESD socket.
4	PSU (Power Supply Unit)	A 450 W AC PSU is provided with the SRX4120.
5	Empty PSU slot	A blank slot to install an additional PSU (1+1 redundancy).

Note:

We ship the SRX4120 with only one power supply. You can order the second power supply separately, if required.

You must not mix AC and DC power supplies in the same chassis.

Figure 3: SRX4120 Rear Panel (DC Variant) Technical diagram of a rack-mounted server showing labeled sections: power supply, cooling fans, indicator panel, I/O ports, and drive bays.

Technical diagram of a rack-mounted server showing labeled sections: power supply, cooling fans, indicator panel, I/O ports, and drive bays.

Table 5: Components on the SRX4120 Rear Panel (DC Variant)
Callout	Item	Description
1	Grounding point	Used to connect the device to earth ground.
2	Fan modules	Four airflow out (AFO) fan modules (3+1 redundancy). Three fan modules are required for proper airflow across the chassis internal components. The fourth fan module provides redundancy.
3	ESD	ESD socket
4	PSU (Power Supply Unit)	A 650W DC PSU is provided with the SRX4120.
5	Empty PSU slot	A blank slot to install an additional PSU (1+1 redundancy).