User Guide

Product Information
4
AXC-EM Enhanced Master Card
Replacing the Battery
There are two lithium batteries on the AXC-EM. The batteries protect the memory on the
AXC-EM. While the DC power is on, the batteries are not used. The battery life is five years. At the
time of installation, record when you need to replace the batteries.
When you replace the batteries, you may do so one battery at a time without loss of data in memory.
To remove and replace the batteries:
1. Discharge static electricity from your body.
2. Remove the card from the CardFrame.
3. Lift the handle and remove one battery from its socket.
4. Carefully slide the new battery under the handle and into the socket.
5. Reset the card in the CardFrame to apply power to the card.
6. Follow steps 1 through 5 to replace the second battery.
Upgrading the Memory Chips
The AXC-EM has two 256 Kb RAM chips. You can upgrade with two 1 Mb RAM chips (FG-072).
To install the RAM chips:
1. Remove the battery.
2. Remove the 256 Kb RAM chips currently in sockets U1 and U2 (FIG. 3).
3. Remove the 1 Mb RAM chips from their anti-static packaging. Save the packaging for storing
the 256 Kb RAM chips.
4. Align the notch end of one of the 1 Mb RAM chips with the notch on one of the sockets. Then,
align Pin 1 of the RAM chip with Pin 1 of the socket (FIG. 4).
All data in memory will be lost if you are not timely in replacing the batteries.
As a precaution, be sure you have access to a backup of your Axcess program. If your program
was loaded with the Source-Send option on, retrieve a copy of the source code from the AXC-EM.
If it was loaded with the Source-Send option off, be sure you obtain a copy of the program before
replacing the batteries.
Improper handling of a lithium battery can be hazardous.
• Never recharge, disassemble, or heat the battery above 212°F (100°C).
• Never solder directly to the battery or expose the contents of the battery to water.
• Dispose of used batteries according to the manufacturer's instructions.
• Replace the battery with a battery of the same type.
FIG. 3 Removing the 256 Kb chip
Pin 1
Pin hole 3