AMX Enhanced Master RS-232 Controller AXB-EM232 - Manual (Page 11)

Product Information
7 AXB-EM232 Enhanced Master RS-232 Controller
RS-232 male program connector
Use either an AMX RS-232 cable (FG 10-726 ) for a DB-25 connector or AMX Programming
cable (FG10-727) for a DB-9 port to connect your PC to the AXB-EM232 and download the
Axcess program. Do not use a null modem cable.
Replacing the Lithium Batteries
The AXB-EM232's two lithium batteries each have a life of approximately 5 years to protect its
memory. When DC power is on, the batteries are not used. When you install the AXB-EM232,
record for future reference the date the batteries should be replaced. When you replace the batteries
(FIG. 10), remove one battery at a time to avoid losing the program in memory.
Before removing the batteries, contact your AMX dealer and verify that they have a current copy of
your program. This will avoid any inadvertent loss of data and prevent an unnecessary service
outage..
1. Discharge the static electricity from your body.
2. Unplug the 2-pin power connector and any other connectors.
3. Remove the two screws on the front panel.
4. Remove the front panel, and slide the circuit board out of the enclosure.
Program Connector and Pinouts
Pin Signal
2 RXD
3 TXD
4 +12 VDC
5 GND
7 +12 VDC
Pin 1
Pin 9
Only an AMX Programming cable or equivalent is to be used due to the voltage on
pins 4 and 7. Failure to do so could damage the com port on a PC.
All data in the AXB-EM232 memory will be lost if you are not timely in replacing the
batteries.
FIG. 10 Lithium battery and socket
There is a danger of explosion if you replace the bat-teries incorrectly. Replace
batteries with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer's instructions. Never
recharge, dis-assemble, or heat the battery above 212°F (100°C). Never solder
directly to the battery or expose the contents of the battery to water.