Independent Mode

Installation

If you want to operate in Independent mode and you plan to use either one or two ± 48 Vdc power sources, configure the option straps as shown in Table 2-3.

Table 2-3

Settings for Independent Mode

S1 Raised

S2 Raised

S3 Raised

S4 Raised

S5 Raised

To set the option straps for Independent mode of operation:

"Procedure

1.Loosen the screws on all five straps (S1 through S5) on the CO Power Unit's backplane so that the screws are not touching the contacts. (Two complete turns will suffice.)

Redundant Mode Ð One Source, One Cable

If you want to operate in Redundant mode and you plan to use a single ± 48 Vdc power source and a single input power cable, configure the option straps as shown in Table 2-4.

Table 2-4

Settings for Redundant Mode

Using a Single ±48 Vdc Power Source and a Single Input Power Cable

S1 Lowered

S2 Lowered

S3 Lowered

S4 Lowered

S5 Lowered

To set the option straps for Redundant mode of

operation using a single ± 48 Vdc power source and a single input power cable:

"Procedure

1.Tighten the screws on all five straps (S1 through S5) on the CO Power Unit's backplane. Make sure

that the screws are securely touching the contacts, but do not screw the straps too tight because doing so can damage the equipment.

Redundant Mode Ð Two Cables

If you want to operate in Redundant mode and you plan to use either a single ± 48 Vdc power source and two input power cables or two separate ± 48 Vdc power sources and two input power cables, configure the option straps as shown in Table 2-5.

Table 2-5

Settings for Redundant Mode with Either a Single Power Source and Two Input Power Cables, or Two Separate

Power Sources and Two Input Power Cables

S1 Lowered

S2 Lowered

S3 Lowered

S4 Raised

S5 Raised

To set the option straps for Redundant mode of operation with either a single power source and two input power cables, or two separate power sources and two input power cables:

"Procedure

1.Tighten the screws on the S1, S2, and S3 straps on the CO Power Unit's backplane. Do not screw the straps too tight because doing so can damage the equipment. Make sure that the screws are securely touching the contacts. Then loosen the screws on the S4 and S5 straps. (Two complete turns will suffice.)

NOTE

In either Independent or Redundant mode of operation, the S4 and S5 straps on the backplane must be raised (loosened) when two separate ±48 Vdc power sources are used to prevent operational problems and voltage incompatibilities.

3000-A2-GB41-40

May 1998

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