DC Power Source Cabling for the MX240 Router
Figure 1 shows a typical DC source cabling arrangement.
Figure 1: Typical DC Source Cabling to the Router
The DC power supply in PEM0 must be powered by a dedicated power feed derived from feed A, and the DC power supply in PEM2 must be powered by a dedicated power feed derived from feed B. This configuration provides the commonly deployed A/B feed redundancy for the system.
 | Caution: 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. |
 | Warning: For field-wiring connections, use copper conductors only. |
| Caution: Power cords and cables must not block access to device components or drape where people could trip on them. |
