Schlage PIB300 User Manual page 995

Planning an Installation
HandPunch to
Host Computer
Connection
RS-232 Host
Computer
Connection
10
Additional options installed and specific configurations within the HandPunch make it
difficult to predict precisely how long battery support will last, but in general two hours
of battery operation can be expected. While operating on battery backup due to loss of
main input power, the battery output voltage is constantly monitored by internal circuitry.
If the battery voltage reaches approximately 9.5 volts the HandPunch automatically shuts
down. This is done to prevent full exhaustion of the battery. A yellow indicator on the
top panel illuminates to indicate that the HandPunch is running on battery power. This
indicator turns off when main input power is restored.
Shunt J7, which is located immediately in front of the DIP switches on the main logic
board (see Figure 4-1 on page 16), enables or disables battery operation on those
HandPunches equipped with optional battery backup. If a HandPunch does not have the
optional battery backup package installed, J7 is not used. On HandPunches equipped
with the battery backup option, J7 allows service personnel a mechanism for disabling
battery backup operation before removal of main input power.
To fully power down a HandPunch equipped with battery backup, remove or reposition
shunt J7 so that the two pins protruding up from the main logic board are not connected
to each other. This effectively opens the circuit, removing the battery from any internal
circuitry. Main input power can then be removed and the HandPunch will fully shut down.
Once the HandPunch has fully shut down, shunt J7 may be reinstalled.
The design of the power supply is such that main input power must be reapplied to re-
enable the battery protection mechanism. If shunt J7 is not properly installed, the internal
backup battery will not be charged, and in the event of a main input power loss, the
HandPunch will shut down.
HandPunch/host computer communications can be configured in one of two ways:
• via a direct RS-232 connection
• via an optional Modem connection
A direct HandPunch connection to a host computer can be made through an 4- conductor
cable in an RS-232 serial configuration. A 6' or 50' cable may be purchased through RSI
or a wiring diagram for the RS-232 to host computer connection is found on Table 2 on
page 17.