Myalarm V-LCD1 Manual de Instruções descarregar pdf (Página 30)

INSTALLATION

5-24

System 2 Installation / Programming Manual

External Back-up Power

If you are using an external 12 volt back-up power supply that has its own back-up battery and charging

circuit, and do not wish to use the supplied 4 amp hr. back-up battery, follow the instructions below. This

modification will disconnect the charging circuit of the System 2.

U Remove power from the System 2

U Cut Diode D7 on the System 2 circuit board

The diode is located approximately 2" above Terminal #4 and just to the left of capacitor C2

U Cut the lead ends off the battery connector

U Connect the ends of the connector to your external power supply

U Apply power to the System 2

Battery Replacement

Modern maintenance-free sealed lead acid rechargeable batteries have an approximate life of three years, or

1000 charge/discharge cycles. When replacement is necessary, the battery must be replaced with a lead acid

type of the same capacity (i.e. = 12 volts, 4 or 6 amp/hrs.). The connecting wires require .187 inch quick

disconnect tabs. The recommended battery measures 3.5 in. x 2.75 in. x 4.0 in. and is manufactured by

YUASA Battery Co., LTD., Part No. NP4-12. Installing a battery with less capacity will degrade the standby

performance times and likewise installing a battery with more capacity will increase standby time.

CAUTION! Do not use dry cell or ni-cad type batteries. They may explode if connected to this System. The

battery used in this device may present a risk of fire or chemical burn if mistreated. Do not recharge,

disassemble, heat above 100°C (212°F) or incinerate. Use of another battery may present a risk of fire or

explosion.

Dispose of used battery promptly. Keep away from children. Do not disassemble and do not dispose of in

fire.

Testing The Battery

After the battery has been charged for at least 24 hours, the voltage measured across the battery terminals

with the charging circuit still connected should be 13.5 to 13.8 volts. A digital voltmeter is required for this

measurement.

To test the quality of the battery, disconnect the battery from the System and attach a 33 ohm, 10 watt resistor

to the battery terminals with jumper leads or test clips. Measure the battery voltage with a voltmeter. If after

60 seconds, the voltage falls below 12.0 volts, the battery should be replaced. CAUTION! The 33 ohm

resistor will get hot if the battery has a full charge!

Internal Lithium Battery

A coin shaped battery (BT1) is located in the upper right hand corner of the circuit board. This battery is used

to run the system clock and backup the memory (RAM). As shipped, the battery is connected to the clock but

it is not connected to the memory. To install this jumper, the battery may be placed "in circuit" to provide

memory backup by installing a jumper on pins 1&2 of the three pin header H4 which is located just above the

TP1 and SCKT 6, in the upper right hand corner of the circuit board. This battery will retain memory for

approximately 30 days.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 335 336

Sem comentários

Myalarm V-LCD1 Manual de Instruções Página 30