Technical Documentation
Power Requirements for AC-Powered SRX3400 Services Gateways
 | Note: If you plan to operate a maximally configured AC-powered services gateway, we recommend that you provision 6 A @ 240 VAC (or 14 A @ 100 VAC) for the system. |
If you do not plan to provision 6 A @ 240 VAC (or 14 A @ 100 VAC) for the system, you can use the information in Table 1 and Table 2 to calculate power consumption for various hardware configurations, and thermal output.
Table 1 lists the power requirements for base AC-powered services gateways operating under typical voltage conditions. It includes the efficiency for the AC power supplies.
Table 1: Base System AC Power Requirements
Component | Power Requirement (Watts) |
|---|---|
Nonredundant configuration includes AC power supply, midplane, SFB, Routing Engine, and the fan tray. | 271 W (approximate) |
Redundant configuration includes two AC power supplies, midplane, SFB, Routing Engine, and the fan tray. | 310 W (approximate) |
| Note: The power requirement values shown in Table 1 are for a lightly loaded system. For a heavily loaded system, the contribution of the base system to the overall system power requirement is lower, because the power supply efficiency improves as the load increases. For a heavily loaded system, both the redundant and nonredundant base systems contribute approximately 271 W to the overall system power requirement. |
Table 2 lists the power requirements for various hardware components when the services gateway is operating under typical voltage conditions.
Table 2: Component AC Power Requirements
Component | Power Requirement (Watts) | AC Input Power Requirement at 85% Power Supply Efficiency |
|---|---|---|
Routing Engine | 53 W | 62 W |
SPC | 118 W | 139 W |
NPC | 64 W | 75 W |
SCM | 35 W | 41 W |
IOC (min) | 40 W | 47 W |
IOC (max) | 52 W | 61 W |
Use the information in Table 1 and Table 2 to calculate power consumption for various hardware configurations, input current from a different source voltage, and thermal output, as shown in the following examples. These examples use maximum values per IOC.
Typical power consumption for AC-powered services gateways:
- Minimum AC-powered configuration:Base services gateway (nonredundant) + 1 SPC + 1 NPC =271 W + 139 W + 75 W = 485 W
- Maximum AC-powered configuration:Base services gateway (redundant) + 4 SPCs + 2 NPC + 1 IOC (max) + 1 SCM =271 W + 4(139) W + 2(75) W + 61 W + 41 W =271 W + 556 W + 150 W + 61 W + 41 W = 1079 W
- Typical system thermal output (based
on maximally configured AC-powered services gateway @ 110 V input):Watts * 3.41 = BTU/hr1079 W * 3.41 = 3679 BTU/hr
