Verilink PRISM 3021 (34-00262) Product Manual Manual do Utilizador descarregar pdf (Página 18)

2-10 Installation

PRISM 3021

Redundant Power Source: The power board allows the

connection of two independent -48 VDC supplies operated

in a redundant mode. All slots are powered from the com-

bined input from the A and B power supplies (the A and B

buses are in a logical OR arrangement). If one supply fails,

the other powers the entire chassis. An example using a

TxPORT 1041 power supply is shown in Figure 2-11.

Single Power Source: Using a single power source is

essentially the same as the redundant configuration with

power supply B not operational. If the redundant power

board is not used, the A and B buses must be connected

together as shown in Figure 2-12.

External Clock Connection

Contacts on the rear of the 1051 chassis permit connection

to an external timing source (using TB1, pins 1 and 2). The

station timing is configured through the Terminal Interface

(see Line Parameters on page 4-13) or through the configu-

ration switches (see Timing Source on page 2-2).

TxPORT

1051

Chassis

TxPORT

1041

Power

Supply

–

GND

TB2

Figure 2-11 Wiring for Redundant Power Sources

PS A

PS B

TxPORT

1051

Chassis

TxPORT

1040

Power

Supply

–

GND

TB2

Figure 2-12 Wiring for a Single Power Source

PS A

PS B

–

GND

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 46 47

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