New Smart Battery for RX3i CPUs - Thursday, December 09, 2010

The IC695ACC302 Auxiliary Smart Battery Module is an Enhanced version of IC693ACC302. In addition to providing an extended memory backup time compared to that of the standard memory backup batteries for PACSystems CPUs, the smart battery module has battery monitor circuit which enables the user to detect the Low battery state in advance before it is drained out completely.  The Auxiliary Smart Battery Module replaces the standard CPU RAM backup battery in your control system for the PACSystems CPUs.

Key Applications
All RX3i and RX7i controller applications that required retenative data and Real Time Functionality

Smart Battery Operation
The battery output voltage is > 2.5 V when the battery is operating in its good state. At the end of the battery good period, the battery output drops to  <2.5 V for the battery low state. The period for the battery low state is 15 days for all CPU models. Once battery output voltage drops to <2.5V, the PACSystems CPU detects this as a battery low condition, a fault is logged in the CPU fault table and the Battery LED on the CPU starts blinking in red.

Once the battery low state is active, the user has only 15 days of accumulative battery backed energy left for CPU RAM retention during power loss.  If the battery is not replaced within 15 days of accumulative power loss period the CPU RAM memory contents will be lost.

If the Battery Low condition occurs when the controller is in the Power OFF state, a low battery fault will be logged in the Fault table only at the time when the controller is powered ON. The Battery Low period of 15 days is counted as soon as the Battery Good period is over and the user should consider how much time the power was off prior to the battery low signal to determine the amount of battery backup energy is left.