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SRX5800 Services Gateway Standard-Capacity AC Power Supply LEDs
AC Power Cord Specifications for the SRX5800 Services Gateway
AC Power Circuit Breaker Requirements for the SRX5800 Services Gateway
SRX5800 Services Gateway Standard-Capacity DC Power Supply LEDs
DC Power Cable Specifications for the SRX5800 Services Gateway
DC Power Cable Lug Specifications for the SRX5800 Services Gateway
DC Power Circuit Breaker Requirements for the SRX5800 Services Gateway
SRX5800 Services Gateway Chassis Grounding Point Specifications
SRX5800 Power System
SRX5800 Services Gateway Power System Overview
The SRX5800 Services Gateway uses either AC or DC power supplies. The services gateway is configurable with two to four AC power supplies or two or four DC power supplies. The power supplies connect to the midplane, which distributes the different output voltages produced by the power supplies to the services gateway components, depending on their voltage requirements.
Table 1 describes the different types of power supplies available.
Table 1: Power Supply Type Summary
Power Supply Type | Input Condition (If Any) | Maximum Output | Redundancy | Power Distribution |
---|---|---|---|---|
AC standard-capacity | 1700 W | 3+1 | Shared | |
AC high-capacity | One AC input | 1700 W | 2+2 | Zoned |
Two AC inputs | 4100 W | |||
DC standard-capacity | 1700 W | |||
DC high-capacity | One DC input | 1700 W | ||
Two DC inputs | 4100 W |
The services gateway must be running Junos OS Release 10.4 or later in order to use high-capacity AC power supplies. The services gateway must be running Junos OS Release 12.1X44-D10 or later in order to use high-capacity DC power supplies.
Redundant power supplies are hot-removable and hot-insertable. Each power supply is cooled by its own internal cooling system.
Devices configured from the factory with DC power supplies are shipped with a blank panel installed over the power distribution modules. Devices configured with AC power supplies have no blank panel.
The services gateway cannot be powered from AC and DC power supplies simultaneously. The first type of power supply detected by the services gateway when initially powered on determines the type of power supply allowed by the services gateway. All installed power supplies of the other type are disabled by the services gateway. If you install a power supply of the other type while the services gateway is operating, the services gateway disables the power supply and generates an alarm.
When the services gateway is powered by standard-capacity AC
power supplies, the services gateway contains either three or four
AC power supplies, located at the rear of the chassis in slots PEM0
through PEM3
(left to right).
Each power supply provides power to all components in the services
gateway. When three power supplies are present, they share power almost
equally within a fully populated system. Four power supplies provide
full power redundancy. If one power supply fails or is removed, the
remaining power supplies instantly assume the entire electrical load
without interruption. Three power supplies provide the maximum configuration
with full power for as long as the services gateway is operational.
When the services gateway is powered by either standard- or high-capacity DC power supplies, or by high-capacity AC power supplies, power distribution within the chassis is divided into zones, as described in Table 2.
Table 2: SRX5800 Services Gateway Power Distribution (DC or High-Capacity AC Power Supplies)
Zone | Power Supplies | Provide Power To: |
---|---|---|
Zone 0 |
|
|
Zone 1 |
|
|
Figure 1 shows the distribution of power from the power supplies to the chassis components in an SRX5800 Services Gateway chassis powered by DC power supplies or high-capacity AC power supplies.

The craft interface draws its power from the SCBs installed in the SCB slots 0, 1, and 2 at the center of the card cage. In the standard configuration, with SCBs in slots 0 and 1, the craft interface is powered on even when one of the two zones loses power. But if the chassis only has one SCB installed, the craft interface draws all of its power from that card, and consequently is powered off if the zone in which that SCB is installed loses power.
You can install either two or four DC power supplies or high-capacity
AC power supplies. Two power supplies are required to power the two
zones, while four power supplies provide full redundancy for both
zones. The power supplies in slots PEM0
and PEM2
form a redundant pair, as do the power supplies in
slots PEM1
and PEM3
. When
two power supplies are installed for a zone, they share the load.
If a power supply fails, its redundant power supply assumes the full
load of that zone without interruption.
If you do install only two power supplies, they must be installed
so that one is in an odd-numbered slot and the other is in an even-numbered
slot. For example, you can install one high-capacity AC power supply
in each of the slots PEM0
and PEM1
.
SRX5800 Services Gateway Standard-Capacity AC Power Supply
Each standard-capacity AC power supply has a corresponding AC appliance inlet located in the chassis directly above the power supply. Each inlet requires a dedicated AC power feed and a dedicated 15 A (250 VAC) circuit breaker. See Figure 2.
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the services gateway chassis must be adequately grounded before power is connected. See Grounding the SRX5800 Services Gateway for instructions.

SRX5800 Services Gateway Standard-Capacity AC Power Supply LEDs
Each standard-capacity AC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 3). The power supply status is also reflected in two LEDs on the craft interface. In addition, a power supply failure triggers the red alarm LED on the craft interface.
Table 3: Standard Capacity AC Power Supply LEDs
Label | Color | State | Description |
---|---|---|---|
| Green | Off | AC power applied to power supply is not within the normal operating range. |
On | AC power applied to power supply is within the normal operating range. | ||
| Green | Off | DC power outputs generated by the power supply are not within the normal operating ranges. |
On | DC power outputs generated by the power supply are within the normal operating ranges. | ||
| Red | Off | Power supply is functioning normally. |
On | Power supply is not functioning normally. Check |
SRX5800 Services Gateway High-Capacity AC Power Supply
High-capacity AC power supplies provide a maximum of 4100 W of power each. Two high-capacity power supplies are required, and you can install four high-capacity power supplies for redundancy. Each high-capacity AC power supply has two corresponding AC appliance inlets: one located in the chassis directly above the power supply and one located near the top edge of the power supply itself. For each power supply, you connect one power cord to the inlet on the chassis above the power supply and one power cord to the inlet on the power supply itself. Each inlet you connect requires a dedicated AC power feed and a dedicated 15 A (250 VAC) circuit breaker. See Figure 3.
The services gateway cannot be powered from standard-capacity and high-capacity AC power supplies simultaneously. The one exception is during the process of replacing standard-capacity AC power supplies with high-capacity AC power supplies, when it is permissible to have both types installed briefly.
The high-capacity power supply will operate with only one of its two AC inlets connected to an AC power feed. However, its DC output will be limited to a maximum of 1700 W. We recommend that you connect two AC power feeds to each high-capacity AC power supply.
The services gateway must be running Junos OS Release 10.4 or later in order to use high-capacity AC power supplies.
Each high-capacity AC power supply has an input mode switch, covered by a small metal plate. The input mode switch tells the system the number of AC power feeds it should expect. The input mode switch settings are described in Table 4. The default setting is 1.
Table 4: High-Capacity AC Power Supply Input Mode Switch Settings
Mode Switch Setting | AC Inputs | Result |
---|---|---|
| Both AC inlets powered | AC output of 4100 W
|
Only one AC inlet powered | AC output of 1700 W
| |
| Both AC inlets powered | AC output of 4100 W
|
Only one AC inlet powered | AC output disabled
|
We recommend that you set the input mode switch to 1
and connect two AC input feeds to each high-capacity
AC power supply.
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the services gateway chassis must be adequately grounded before power is connected. See Grounding the SRX5800 Services Gateway for instructions.

SRX5800 Services Gateway High-Capacity AC Power Supply LEDs
Each high-capacity AC power supply faceplate contains four LEDs that indicate the status of the power supply (see Table 5). The power supply status is also reflected in two LEDs on the craft interface. In addition, a power supply failure triggers the red alarm LED on the craft interface.
Table 5: High-Capacity AC Power Supply LEDs
Label | Color | State | Description |
---|---|---|---|
| Green | Off | AC power applied to power supply at the upper appliance inlet is not within the normal operating range. |
On | AC power applied to power supply at the upper appliance inlet is within the normal operating range. | ||
| Green | Off | AC power applied to power supply at the lower appliance inlet is not within the normal operating range. |
On | AC power applied to power supply at the lower appliance inlet is within the normal operating range. | ||
| Green | Off | DC power outputs generated by the power supply are not within the normal operating ranges. |
On | DC power outputs generated by the power supply are within the normal operating ranges. | ||
| Red | Off | Power supply is functioning normally. |
On | Power supply is not functioning normally. Check the |
SRX5800 Services Gateway AC Power Supply Specifications
Table 6 lists the AC power supply electrical specifications for both the standard-capacity and high-capacity AC power supply. Table 7 lists the AC power system electrical specifications.
Table 6: AC Power Supply Electrical Specifications
Item | Specification | |
---|---|---|
Standard-Capacity | High-Capacity | |
Maximum output power | 1700 W | 4100 W (two AC inputs) 1700 W (one AC input) |
AC input current rating | 11 A @ 240 VAC maximum | 13 A @ 240 VAC maximum per AC input (26 A per power supply when two AC inputs are used) |
AC input voltage | Operating range: 200 to 240 VAC | |
AC input line frequency | 50 to 60 Hz | |
Efficiency | ~88% Note: This value is at full load and nominal voltage. |
Table 7: AC Power System Specifications
Item | Normal-Capacity | High-Capacity | |
---|---|---|---|
Two AC inputs for each power supply | One AC input for each power supply | ||
Redundancy | 3+1 | 2+2 | 2+2 |
Output power (maximum) per supply | 1700 W | 4100 W | 1700 W |
Output power (maximum) per system | 5100 W | 8200 W | 3400 W |
AC Power Cord Specifications for the SRX5800 Services Gateway
Each AC power supply has a single AC appliance inlet located in the chassis directly above the power supply that requires a dedicated AC power feed. Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the services gateway. An AC power cord connects each power supply to the power distribution panel.
The services gateway is not shipped with AC power cords. You must order power cords separately using the model number shown in Table 8. The C19 appliance coupler end of the cord inserts into the AC appliance inlet coupler, type C20 (right angle) as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source receptacle that is standard for your geographical location.
Table 8 provides specifications and Figure 4 depicts the plug on the AC power cord provided for each country or region.
Table 8: AC Power Cord Specifications
Country | Model Number | Electrical Specification | Plug Type |
---|---|---|---|
Australia | CBL-M-PWR-RA-AU | 240 VAC, 50 Hz AC | SAA/3 |
China | CBL-M-PWR-RA-CH | 220 VAC, 50 Hz AC | PSB-10 |
Europe (except Denmark, Italy, Switzerland, and United Kingdom) | CBL-M-PWR-RA-EU | 220 or 230 VAC, 50 Hz AC | CEE 7/7 |
Italy | CBL-M-PWR-RA-IT | 230 VAC, 50 Hz AC | CEI 23-16/VII |
Japan | CBL-M-PWR-RA-JP | 220 VAC, 50 or 60 Hz AC | NEMA L6-20P |
North America | CBL-M-PWR-RA-TWLK-US | 250 VAC, 60 Hz AC | NEMA L6-20P |
United Kingdom | CBL-M-PWR-RA-UK | 240 VAC, 50 Hz AC | BS89/13 |

The AC power cord for the services gateway is intended for use with the services gateway only and not for any other use.
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5800 Services Gateway for instructions.
Power cords and cables must not block access to services gateway components or drape where people could trip on them.
In North America, AC power cords must not exceed 4.5 m (approximately 14.75 ft) 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 listed in Table 8 are in compliance.
AC Power Circuit Breaker Requirements for the SRX5800 Services Gateway
Each AC power supply has a single AC appliance inlet located in the chassis directly above the power supply that requires a dedicated AC power feed. We recommend that you use a dedicated customer site circuit breaker rated for 15 A (250 VAC) minimum for each AC power supply, or as required by local code.
SRX5800 Services Gateway Standard-Capacity DC Power Supply
In the DC power configuration, the services gateway contains
either two or four DC power supplies (see Figure 5), located at the lower rear of
the chassis in slots PEM0
through PEM3
(left to right). You can upgrade your DC power system
from two to four power supplies.
Four power supplies provide full redundancy. If a DC power supply fails, its redundant power supply takes over without interruption.
Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated 80 A (–48 VDC) circuit breaker for the maximum hardware configuration.

SRX5800 Services Gateway Standard-Capacity DC Power Supply LEDs
Each standard-capacity DC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 9). The power supply status is also reflected in two LEDs on the craft interface. In addition, a power supply failure triggers the red alarm LED on the craft interface.
Table 9: DC Power Supply LEDs
Label | Color | State | Description |
---|---|---|---|
| Green | Off | Power supply is not functioning normally. Check the |
On | Power supply is functioning normally. | ||
| Green | Off | DC power supply circuit breaker is turned off. |
On | DC power supply circuit breaker is turned on. | ||
| Green | Off | DC input to the PEM is not present. |
On | DC input is present, and is connected in correct polarity. | ||
Amber | On | DC input is present, but connected in reverse polarity. |
SRX5800 Services Gateway High-Capacity DC Power Supply
High-capacity DC power supplies provide a maximum of 4100 W of power each. Two high-capacity DC power supplies are required, and you can install four high-capacity DC power supplies for redundancy. Each high-capacity DC power supply has inlets for two DC power feeds. The four power connectors (-48V and RTN for each of the two inlets) are located behind a clear plastic cover near the bottom of the power supply. Each DC power inlet you use requires a dedicated DC power feed and a dedicated 80 A circuit breaker. See Figure 6.
The services gateway cannot be powered from standard-capacity and high-capacity DC power supplies simultaneously. The one exception is during the process of replacing standard-capacity DC power supplies with high-capacity DC power supplies, when it is permissible to have both types installed briefly.
The high-capacity power supply will operate with only one of its two DC inlets connected to a DC power feed. However, its DC output will be limited to a maximum of 1700 W. We recommend that you connect two DC power feeds to each high-capacity DC power supply.
The services gateway must be running Junos OS Release 12.1X44-D10 or later in order to use high-capacity DC power supplies.
Each high-capacity DC power supply has an input mode switch, covered by a small metal plate. The input mode switch tells the system the number of DC power feeds it should expect. The input mode switch settings are described in Table 10. The default setting is 1.
Table 10: High-Capacity DC Power Supply Input Mode Switch Settings
Mode Switch Setting | DC Inputs | Result |
---|---|---|
| Both DC inlets powered | DC output of 4100 W
|
Only one DC inlet powered | DC output of 1700 W
| |
| Both DC inlets powered | DC output of 4100 W
|
Only one DC inlet powered | DC output disabled
|
We recommend that you set the input mode switch to 1
and connect two DC input feeds to each high-capacity
DC power supply.
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the services gateway chassis must be adequately grounded before power is connected. See Grounding the SRX5800 Services Gateway for instructions.

SRX5800 Services Gateway High-Capacity DC Power Supply LEDs
Each high-capacity DC power supply faceplate contains four LEDs that indicate the status of the power supply (see Table 11). The power supply status is also reflected in two LEDs on the craft interface. In addition, a power supply failure triggers the red alarm LED on the craft interface.
Table 11: High-Capacity DC Power Supply LEDs
Label | Color | State | Description |
---|---|---|---|
| Green | Off | DC power applied to the power supply at input INP0 is not within the normal operating range. |
On | DC power applied to the power supply at input INP0 is within the normal operating range. | ||
| Green | Off | DC power applied to the power supply at input INP1 is not within the normal operating range. |
On | DC power applied to the power supply at input INP1 is within the normal operating range. | ||
| Green | Off | DC power outputs generated by the power supply are not within the normal operating ranges. |
On | DC power outputs generated by the power supply are within the normal operating ranges. | ||
| Red | Off | Power supply is functioning normally. |
On | Power supply is not functioning normally. Check the |
SRX5800 Services Gateway DC Power Supply Specifications
Table 12 lists the DC power supply electrical specifications.
Table 12: DC Power Supply Electrical Specifications
Item | Standard-Capacity | High-Capacity | |
---|---|---|---|
Two-Feed Mode | One-Feed Mode | ||
Maximum output power | 2800 W | 4100 W | 1700 W |
DC input voltage | Nominal: –48 VDC Operating range: –40 to –72 VDC | Nominal: –48 VDC Operating range: –40 to –72 VDC | Nominal: –48 VDC Operating range: –40 to –72 VDC |
Maximum input current rating @ 40 VDC | 70 A | 128 A for both feeds (66 A and 62 A per feed) | 52 A |
DC nominal input current rating @48 VDC | 58 A maximum@–48 VDC (nominal) | 104 A for both feeds (54 A and 50 A per feed) | 42 A |
Efficiency | 99% | 86% | |
Note: This value is at full load and nominal voltage. | |||
Internal Circuit Breaker | 80 A | – | – |
Table 13 lists the power system electrical specifications.
Table 13: Power System Electrical Specifications
Item | Normal-Capacity | High-Capacity | |
---|---|---|---|
Redundancy | 2+2 | 2+2 | |
Output power (maximum) per supply | 2800 W | Two-feed mode | One-feed mode |
4100 W | 1700 W | ||
Output power (maximum) per system | 5600 W | 8200 W | 3400 W |
DC Power Cable Specifications for the SRX5800 Services Gateway
Table 14 summarizes the specifications for the power cables, which you must supply.
Table 14: DC Power Cable Specifications
Cable Type | Quantity | Specification |
---|---|---|
Power | Four 6-AWG (13.3 mm2) cables for each power supply | Minimum 60°C wire, or as required by the local code |
You must ensure that power connections maintain the proper polarity.
The power source cables might be labeled (+)
and (–)
to indicate their polarity. There is no standard
color coding for DC power cables. The color coding used by the external
DC power source at your site determines the color coding for the leads
on the power cables that attach to the terminal studs on each power
supply.
DC Power Cable Lug Specifications for the SRX5800 Services Gateway
The accessory box shipped with the services gateway includes the cable lugs that attach to the terminal studs of each power supply (see Figure 7).

Before services gateway installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the services gateway.
The services gateway is a pluggable type A equipment installed in restricted access location. It has a separate protective earthing terminal [Metric -M6 and English - ¼-20 screw) ground lugs] provided on the chassis. This separate protective earth terminal must be permanently connected to earth.
DC Power Circuit Breaker Requirements for the SRX5800 Services Gateway
If you plan to operate a maximally configured DC-powered services gateway with standard-capacity power supplies, we recommend that you provision at least 116 A (58 A per feed) @ –48 VDC (nominal) for the system. Use a customer site circuit breaker rated according to respective National Electrical Code and customer site internal standards to maintain proper level of protection for the current specified above.
If you plan to operate a maximally configured DC-powered services gateway with high-capacity power supplies, we recommend that you provision at least 208 A (104 A per supply) @ –48 VDC (nominal) for the system. This is maximum current draw at –48 VDC when two power supplies are providing the power to the system and the redundant power supplies are not supplying power or not present. Use a customer site circuit breaker rated according to respective National Electrical Code and customer site internal standards to maintain proper level of protection for the current specified above.
If you plan to operate a DC-powered services gateway at less than the maximum configuration, we recommend that you provision a circuit breaker according to respective National Electrical Code and customer site internal standards to maintain proper level of protection for the current specified above or each DC power supply rated for at least 125% of the continuous current that the system draws at –48 VDC.
DC Power Source Cabling for the SRX5800 Services Gateway
Figure 8 shows a typical DC source cabling arrangement.

The DC power supplies in slots PEM0
and PEM1
must be powered by dedicated power feeds derived
from feed A, and the DC power supplies in slots PEM2
and PEM3
must be powered by dedicated power
feeds derived from feed B. This configuration provides the commonly
deployed A/B feed redundancy for the system.
You must ensure that power connections maintain the
proper polarity. The power source cables might be labeled (+)
and (–)
to indicate their
polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to
the terminal studs on each power supply.
For field-wiring connections, use copper conductors only.
Power cords and cables must not block access to device components or drape where people could trip on them.
SRX5800 Services Gateway Chassis Grounding Point Specifications
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5800 Services Gateway for instructions.
Before services gateway installation begins, a licensed electrician must attach cable lugs to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the services gateway.
The services gateway chassis has two grounding points along the lower edge of the back panel. Each grounding point consists of two threaded holes spaced 0.625-in. (15.86-mm) apart (see Figure 9). The left grounding point fits M6 screws (European), and the right grounding point fits UNC 1/4–20 screws (American). The accessory box shipped with the services gateway includes the cable lug that attaches to the grounding cable and two UNC 1/4–20 screws used to secure the grounding cable to the right-side grounding point on the services gateway.

To ground the services gateway, you must connect a grounding cable to earth ground and then attach it to the chassis grounding point using the two screws provided.
Additional grounding is provided to an AC-powered services gateway when you plug its power supplies into grounded AC power receptacles.
SRX5800 Services Gateway Grounding Cable Specifications
The grounding cable that you provide must meet the specifications in Table 15.
Table 15: Grounding Cable Specifications
Cable Type | Quantity and Specification |
---|---|
Grounding | One 6-AWG (13.3 mm2), minimum 60°C wire, or as required by the local code |
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5800 Services Gateway for instructions.
SRX5800 Services Gateway Grounding-Cable Lug Specification
The accessory box shipped with the services gateway includes the cable lug that attaches to the grounding cable (see Figure 10) and two UNC 1/4–20 screws used to secure the grounding cable to the grounding points.

Before services gateway installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the services gateway.
The same cable lug is used for the DC power cables.