Ingersoll-Rand SCHLAGE HP-3000, User Manual

Page: 15 / 101

HandPunch 3000/4000 Manual
13
When input power is restored, the HandPunch switches off of battery
operation and the battery charger is re-enabled to recharge the battery.
Battery charge voltage is set at approximately 13.65 volts, and battery charge
current is limited to approximately 50 mA. A fully discharged battery requires
approximately 12 hours of charge to fully recover.
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 off of battery power. This
indicator extinguishes when main input power is restored.
Shunt J7 which is located to the left of TS3 see “Figure 4-1” on page 31 enables
or disables battery operation on those HandPunchs equipped with optional
battery backup. If a HandPunch does not have the optional battery backup
package installed, J7 is not used. On HandPunchs 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.
The HandPunch with the battery backup option uses a 12 volt 800 ma/hour
sealed lead acid battery to provide backup battery power. This battery is
located immediately inside the rear panel of the HandPunch and plugs into
jack J4 on the keypad control circuit board located in the top of the chassis.
Schlage Biometrics recommends that all HandPunchs be grounded with a
solid, reliable earth ground connection. This connection establishes a common
ground return point used to protect internal semiconductor devices from
ElectroStatic Discharge (ESD) and from external signal line transients. It also
provides a common signal level reference point between externally networked
HandPunchs. Schlage Biometrics recommends that the earth ground source
be identified by a qualified electrician familiar with electrical codes as well as
wiring and grounding techniques.
Earth
Ground
and
Shielding