Juniper Networks ERX-1410, ERX-1440, ERX-700 manual Cabling the Power Input Module, Cable/Wire From

4-4

CHAPTER 4

Cabling the ERX System

Lightning Activity Warning: Do not work on the system or connect or disconnect cables during lightning activity.

DC Power Disconnection Warning: Before powering on the ERX system, remove power from the DC circuit by deactivating the circuit breaker on the panel board that services the DC circuit.

Servicing Unit Warning: Before servicing the ERX system, turn off the power.

Jewelry Removal Warning: Remove jewelry (including rings, necklaces, and watches) before working on equipment that is connected to power lines. Metal objects heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.

Metal Objects Warning: Do not insert any metal object, such as a screwdriver, into an open slot or the backplane. Doing so may cause electric shock and serious burns.

Note: If you plan on using a cable-management bracket, install it before you begin cabling your ERX system. Cable-management brackets are helpful to keep network interface cables untangled and orderly and to prevent cables from hindering access to other slots.

Cabling the Power Input Module

Input power is supplied to the system by two redundant and independent –48 VDC line feeds. If one line fails, the other can carry the full load of the system. See Appendix A, System Specifications for the power requirements for the ERX system.

Table 4-1identifies the power input module cabling requirements.

Table 4-1Power input module cables/wires needed

Cable/Wire	From	To
One 10-AWG	Power input module ground	Termination ground
ground wire	terminal
Two 10-AWG wire	Power input module Power A	Appropriate leads on power
leads	–48 VDC and RTN leads	source No. 1
Two 10-AWG wire	Power input module Power B	Appropriate leads on power
leads	–48 VDC and RTN leads	source No. 2