Technical Documentation
T1600 DC Power Requirements
To allow for future growth so that you can operate the router in any hardware configuration without upgrading the power infrastructure, we recommend that you provision the following for each power supply.
 | Note: Although the power requirements for each input varies, we recommend that you provision the same amount of power for each input. |
- Three-input 240-A DC power supply: 67 A @ –48 VDC per input
- Four-input 240-A power supply: 50 A @ –48 VDC per input
Table 1 lists the power requirements
for various hardware components when the router is operating
under typical voltage conditions. For PIC power requirements, see
the T1600 Core Router PIC Guide 
.
You can use the information in Table 1 and the T1600 Core Router PIC Guide to calculate power consumption for various
hardware configurations, input current from a different source voltage,
and thermal output, as shown in the following examples for a DC-powered router.
Table 1: Typical DC Power Requirements for T1600 Components
Component | Current Requirement (Amps @ –48 VDC) |
|---|---|
Base system, not including FPCs and PICs (includes five T1600-SIBs, one host subsystem, one SCG, two power supplies, cooling system at normal speed, and craft interface) | 30.9 A |
T1600-SIB | 3.6 A |
TXP-1600 SIB | 4.1 A |
Enhanced II FPC1 | 3.4 A |
Enhanced Scaling FPC1 | 7.1 A |
FPC2 and Enhanced II FPC2 | 3.4 A |
FPC3, Enhanced FPC3,and Enhanced II FPC3 | 6.8 A |
Enhanced Scaling FPC3 | 9.11 A |
T640 Enhanced Scaling FPC4 | 8.2 A |
T1600 Enhanced Scaling FPC4 | 11.3 A |
Host subsystem (600, 1600, or 2000 Routing Engine and T-CB) | 2.6 A |
Line-card chassis control board (LCC-CB) | 1.0 A |
C1800 Routing Engine | 1.7 A |
SCG | 0.2 A |
Redundant backup 3-input 240 A DC power supply | 1.7 A |
Redundant backup 4-input 240 A DC power supply | 1.7 A |
Cooling system (normal speed) | 6.7 A |
Cooling system (full speed) | 22 A |
Craft interface | 0.2 A |
PIC—Generalized typical value | 0.625 A |
PIC—Generalized maximum value | 3.3 A |
- Example of calculating power consumption for a minimum
configuration under typical voltage conditions::Base System + 1 Type 3 FPC + 1 PIC =30.9 A + 6.8 A + 0.625 A = 38.33 A @ –48 VDC = 1,840 W
- Example of calculating power consumption for a maximum
configuration under typical voltage conditions::Base System + 8 T1600-Type 4 FPCs + 1 LCC-CB + 1 RE-C1800 + 1 SCG + 16 PICs + 5 (TXP-T1600 SIBs – T1600 SIBs) =30.9 A + 8 (11.3 A) + 1.0 A + 1.7 A + + 0.2 A + 16 (3.3 A) + 5(0.5) A=30.9 A + 90.4 A + 1.0 A + 1.7 A + + 0.2 A + 52.8 A + 2.5 A= 179.5 A @ –48 VDC = 8616 W
- Current requirement adjustment for fans running at full
speed (high temperature environment or cooling component failure):Calculated system current (X) – Cooling (normal) + Cooling (full speed) =X A – 6.7 A + 22 A = X A + 15.3 A
- Input current from a DC source other than –48 VDC
(based on maximum configuration):(–54 VDC input) x (input current X) = (–48 VDC) x (input current Y)54 x X = 48 x 94.1 AX = 48 x 94.1 A/54 = 83.6 A
- Typical system thermal output for maximum configuration:Watts DC/0.293 = BTU/hr8616/0.293 = 29,406 BTU/hr
