User guide

Troubleshooting and Maintenance

890 USE 108 00 August 2001 217

Battery Maintenance

Battery

Maintenance

The batteries are used to back up the RAM and to provide power to the clock.

You can access the batteries from the front of the Compact PLCs after you remove

the front panel of the DTA 200.

A new battery is needed when the battery low LED (red) comes ON. The LED

indicates the battery needs to be replaced but it has: a 14 day hold-up for A984-1xx,

E984-24x/251/255 PLCs, or a 10 day hold-up for E984-258/265/275/285 PLCs from

the initial indication. The minimum backup retention period is one-hundred days.

You should replace the battery every five years to assure its backup capacity.

Ensure the supply voltage is switched ON. Remove the DTA 200 front panel, battery

compartment cover, and the battery. Then insert the new battery (+ pole towards

you) and note the date.

CAUTION

Used batteries are hazardous refuse

Please properly dispose of used batteries. Never disassemble, short-

circuit or recharge Lithium batteries. There is the possibility of

supercharge (voltage reversal) if a battery is overheated by external

heat sources.

The following figure shows the proper placement of the battery.

Failure to observe this precaution can result in injury or equipment

damage.