CHAPTER 6 FUNCTIONING OF EQUIPMENT - TM-5-6350-262-14-110022

TM 5-6350-262-14/11/NAVALEX 0967-4669111/TO 31S94-39-1

CHAPTER 6

FUNCTIONING OF EQUIPMENT

6-1.

General

month

storage

period

without

recharging. This may be done in one of

the three following ways:

This chapter contains a description for each of the

(1) For a Monitor Unit left in place

modules which are an integral part of the monitor

and still connected to ac power, pull dc

cabinet(s) (i.e., power supply, signal module, and

fuse Fl, throw the power switch to ON,

interconnecting cable assembly).

Explanations are

and leave ON. This will maintain a

keyed to the monitor cabinet(s) functional schematic

trickle charge on the battery, thus

diagrams shown in figures 6-1, FO-1, and FO-2.

preventing

the

battery

from

6-2.

Monitor Cabinet Power

deteriorating.

2. For the same Monitor Unit

condi- tions as 1 above, ac power may

Input power for the monitor cabinet is provided by two

be shut off, but a schedule of turning the

different sources. The primary power source of 115 V

ac power ON for 72 consecutive hours

ac, 60 Hz is supplied through TB1 of the power supply.

every six months shall be maintained.

The secondary, or emergency, power source of 24 V dc

3. If the Monitor Unit is completely

is supplied through TB2 of the power supply by one to

disconnected, remove the batteries, and

three sealed, rechargeable batteries. Monitor Cabinet

store. If batteries are kept in storage in

CY-7361( )/FSS-9(V) is provided with provisions for an

excess of 6 months, recharge every 6

auxiliary battery which is connected to TB4 of the power

months. Charging supply shall be a

supply through an auxiliary DC input located on the

constant voltage source set between 30-

exterior of the enclosure.

31 volts, with a charging current not to

exceed 5 amperes per 30 AMP-HR

6-3.

Power Supply

battery for a 24-hour recharging rate.

The' charging current for the 5 AMP-HR

The POWER ON/OFF switch (S1) controls the ac

batteries shall not exceed 800

primary and the dc emergency input power source to the

milliamperes per battery for the 24-hour

power supply module. The ac input circuit is protected

charging rate. REASON: The average

by a fuse (F2). The 115 V ac input from TB1-1 and -2 is

shelf life of the batteries without

rectified and regulated to +20 V dc and presented at

recharging is 7-9 months. After this

TB3-2, -3 and -4 with respect to TB3-5, -6, and -7.

length of time a majority of the batteries

When the power supply is operating from the emergency

will not take or hold a charge. To

input the 24 V dc is regulated to +20 Vdc and presented

prevent any possibility of losing any

at TB3-2, -3, and -4. The output circuit is protected by a

batteries, the 6-month recharging cycle

fuse (F1). The power supply automatically switches

was established.

internally to the emergency power source when there is

a failure of the primary power source. Circuitry within

6-4.

Signal Module

the power supply continuously monitors the source of

input power. When the power supply is operating from

The signal module is an integral part of each monitor

the primary power source, 22 V ac is present at TB3-1.

cabinet. Its function is to monitor the ac power in the

If the power supply is operating from the emergency

monitor cabinet and provide an audible and visual alarm

power source, no voltage is seen at TB3-1. The power

when a change in status or operating power or an alarm

supply contains a battery charging circuit that maintains

is presented to the monitor module(s) Whenever there is

the emergency source at a 27.5 V dc unloaded level

a change in status of the monitor cabinet input power the

while the power supply is operating from the primary

visual (DL1 and DL2) and audible (DS1) alarm on the

power source.

signal module are activated.

The signal module

operates on +20 V dc supplied by the monitor cabinet

NOTE

power supply to TB1-3 of the signal module. Two lamps

(DS1 and DL2) labeled MONITOR AC POWER provides

If for any reason the Monitor Unit is

the visual alarm. A sonalert (DS1) provides the aural

deactivated, steps shall be taken to

prevent the battery from exceeding a 6-

Change 1 6-1