Zhone Technologies IMACS-200 manual DC power installation, DC Power plug

System Installation Power and Grounding on the IMACS-200

The telecommunications voice signaling ground is a referenced ground connection to the

-48VDC power system. Both feeds are referenced to the same place within the IMACS-200. This reference ground can occur at the -48VDC power source. If the ground connection is not maintained, and one side of the connection equipment is not referenced to an earth ground then a floating ground condition can occur causing the voice circuits and the voice signaling to react erratically when either end of the connecting equipment tries to start the circuit.

Sites using only loop start telecommunication circuits (no ground start or E&M signaling) can operate properly without the Telecom Signaling Ground.

When grounding the system, use 14 gauge solid wire for a single connection to the provided earth ground screw.

For AC powered systems, the right and left-hand connections provide for separate, redundant power feeds to the system's pre-installed AC power supplies if so equipped. These two sets of leads provide a connection for separate, redundant power feeds to the system in a load-sharing mode.

2.5.7DC power installation

When wiring to an external power source, such as a battery rack, fuse panel, or circuit breaker, make sure that the correct rating of wire is used. Figure 2-5illustrates the DC power plug. It is recommended that you use 20 to 18 gauge solid wire.

Figure 2-5. DC Power plug

When the IMACS-200 is ordered with a single-power supply unit, the IMACS-200 will come with the power supply installed on the right-hand rear of the box, closest to the T1/E1 ports and grounding screw. Insert the power plug illustrated above into this right-hand rear connector.

System Installation 2-15