JCS1200 Platform Power Overview
The JCS1200 platform does not have a power switch. The platform has four power connectors; each powers a power module. As viewed from the rear of the JCS1200 platform, power connector 1 (top-right connector) supplies power to power module bay 1, power connector 2 (bottom-left connector) supplies power to power module 2, power connector 3 (top-left connector) supplies power to power module 3, and power connector 4 (bottom-right connector) supplies power to power module 4 (see Figure 1).
Figure 1: Direction of Power from Power Connectors to Power Modules on the JCS1200 Platform
Power modules 1 and 2 are redundant and provide power to Routing Engine bays 1 through 6; power modules 3 and 4 are redundant and provide power to Routing Engine bays 7 through 12. To ensure power redundancy, a typical power configuration is to supply power to power connectors 1 and 4 from one power source location while supplying power to power connectors 2 and 3 from another power source location. The power domains are shown in Figure 2.
Figure 2: Logical View of Power Domains on the JCS1200 Platform
 | Note: The release handles on the fan shuttle have a safety switch that disables power output from the power boxes. If the release handles are not secured to the chassis with the thumbscrews, the JCS1200 platform will not power on. |
