User`s manual

User’s Manual 15
2.8 Remove Battery Tab
The backup battery on the OP7200 has a plastic tab to protect the battery against discharg-
ing before the OP7200 is placed into service. Although the battery is located inside the
OP7200’s protective casing, it is possible to reach the plastic tab using pliers or tweezers
from the opening on the side of the OP7200 shown in Figure 4.
Figure 4. Remove Battery Tab
NOTE: Rabbit recommends that the battery tab not be removed until you are ready to
place the OP7200 in normal service with regular power connected to header J3.
The backup battery protects the contents of the SRAM and keeps the real-time clock
running when regular power to the OP7200 is interrupted. If you plan to use the real-time
clock functionality in your application, you will need to set the real-time clock once you
remove the plastic tab. Set the real-time clock using the onscreen prompts in the demon-
stration program. Alternatively, you may set the real-time clock using the
SETRTCKB.C
sample program from the Dynamic C SAMPLES\RTCLOCK folder. The RTC_TEST.C
sample program in the Dynamic C SAMPLES\RTCLOCK folder provides additional exam-
ples of how to read and set the real-time clock.
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GND
GND
EGND
DS2
LN
K
ACT
D
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1
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2
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Flash
EPROM
J2
J6
J3
J10
PROG
1
1
1
1
E-Net
R-Net
1
USR PWR
LNK ACT
Pull
Plastic
Tab
CAUTION: Disconnect power
before making or removing
terminal connections.