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Installing 505 System Hardware SIMATIC 545/555/575 System Manual

Replacing and Handling the Battery (continued)

ATTENTION: Danger of explosion if battery is incorrectly replaced. Replace

only with the same or equivalent type recommended by the manufacturer.

Discard used batteries according to the manufacturer’s instructions.

ATTENTION: Il y a danger d’explosion s’il y a remplacement incorrect de la

batterie. Remplacer uniquement avec une batterie du même type ou d’un type

recommandé par le constructeur. Mettre au rebut les batteries usagées

conformement aux instructions du fabricant.

* Canadian standard CAN/CSA C22.2, No. 950–M89

Battery changes require advance planning. For the 545–1103/1104 and

555–1103/1104 CPUs, keep the following guidelines in mind:

• In order to change the lithium battery, you must power down the

system.

• Memory can be lost if system power is removed from the CPU for

longer than twenty minutes during a battery change.

• A good battery must be in place when power is restored, or else the

CPU goes through a battery-bad powerup and all memory is lost.

NOTE: As a safeguard, consider using SoftShop, TISOFT, or APT to save

your program before you replace the battery.

Follow these steps to replace the lithium battery:

1. Place your process in a safe state.

WARNING

Installing or removing a CPU from a powered-up base disrupts your process.

Disruption of your process can cause death or serious injury to personnel,

and/or damage to equipment.

Ensure that all power is disabled before installing or removing the CPU.

2. Disconnect power from the chassis.

At room temperature, you have approximately twenty minutes to

replace the battery after power is removed from the CPU.

If the CPU detects a bad battery before power is either removed or lost

(e.g., power failure), you must replace the battery before restoring

power, or lose memory contents.

Replacing the

Battery in

–1103/–1104 CPUs

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Siemens SIMATIC TI500 Especificaciones Pagina 75