Technical Documentation
Power Requirements for AC-Powered SRX3600 Services Gateways
 | Note: If you plan to operate a maximally configured AC-powered services gateway, we recommend that you provision 24 A @ 100 V for the system, or 12.0 A @ 100-127 V / 7 A @ 200-240 V for each power supply. |
If you do not plan to provision 24 A @ 100 V for the system, or 12.0 A @ 100-127 V / 7 A @ 200-240 V for each power supply, 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 two AC power supplies, midplane, SFB, Routing Engine, and the fan tray | 353 W (approximate) |
Redundant configuration includes four AC power supplies, midplane, SFB, Routing Engine, and the fan tray | 430 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 353 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, 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 =353 W + 139 W + 75 W = 567 W
- Maximum AC-powered configuration:Base services gateway (redundant) + 7 SPCs + 3 NPCs + 2 IOCs + SCM =353 W + 7(139) W + 3(75) W + (2) 61 W + 41 W =353 W + 973 W + 225 W + 122 W + 41 W = 1714 W
- Typical system thermal output (based on maximally
configured AC-powered services gateway @ 110 V input):Watts * 3.41 = BTU/hr1714 W * 3.41 = 5845 BTU/hr
