CTI Products DC Distribution Panel Manual del usuario - Página 6

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CTI Products, Inc.

Status Indication

Three status signals are available to inform monitoring equipment if the redundant power supplies

are functioning or if any fuses are blown. The three status signals are driven from solid state

relays, with an output rating of 60V, and protected with 0.5A fuses. (These fuses are non-field

replaceable, since they are soldered.) These signals are referenced to the COM signal. Table 2

lists the terminal connections for these signals and jumpers for referencing to GND.

Signal

GND

ALRM_FUSE-

ALRM_FUSE+

PWRB_OK-

PWRB_OK+

PWRA_OK-

PWRA_OK+

OUNTING

The Power Supply Options are normally mounted to the panel on the side opposite to where the

relay boards are mounted as indicated in Error! Reference source not found.. This figure shows

the Hot-Standby Power Supply Option. For the Single Power Supply Option, only the supply on

the right-hand side is used. (The Relay Power Distribution Board is not used for the Single Power

Supply Option.)

Index

TB7

GND

Terminal

Referenc

e Jumper

Table 2 – TB7 Signal Connections

DC Distribution Panel User Guide

Description

Ground Reference

Relay contact closes if either

input supply is not

present, or if any fuse (F1 –

F6) is blown.

Relay contact closes if the

input supply is

present and Fuse F6 is OK.

Relay contact closes if the

input supply is

present and Fuse F5 is OK.