Storage Elements

Lithium battery

AC500 Processor Modules are supplied without a Lithium battery. It therefore must be ordered separately. The TA521 Lithium Battery is used to save RAM contents of AC500 Processor Modules and back-up the real-time clock. Although the Processor Modules can work without a battery, its use is still recommended in order to avoid process data being lost.

The Processor Module monitors the battery status. A low battery warning is output before the battery condition becomes critical (about 2 weeks before). After the warning message appears, the battery should be replaced as soon as possible. The technical data, handling instructions and the insertion/replacement of the battery is described in detail in chapter TA521 Lithium Battery. TA521 - Lithium Battery

SD Memory Card

AC500 Processor Modules are supplied without an SD Memory Card. It therefore must be ordered separately. The SD Memory Card is used to back-up user data and store user programs as well as to update the internal Processor Module firmware. AC500 Processor Modules can be operated with and without SD Memory Cards.

The Processor Module uses a standard file system. This allows standard card readers to read the MC502 SD Memory Cards.

The technical data, handling instructions and the insertion/replacement of the SD Memory Card is described in detail in chapter SD Memory Card MC502. MC502 - SD Memory Card