Schlage PIB300 User Manual page 324

Planning an Installation
Wiring
Power Input
NOTE
NOTE
NOTE
Battery Backup
8
Four basic circuits typically connect to the HandReader:
• Power Input
• Door Control Inputs and Outputs
• Networking and Communications
• Card Reader Input and Emulation Output
The HandReader requires 12 to 24 volts DC (600 mA) or 12 to 24 volts AC (7 watts).
Power can be connected either to the power terminal pins 1 and 2 or through barrel jack
J12.
Terminal 1 and the center pin of power jack J12 are connected together. Terminal 2 and
the sleeve of power jack J12 are connected together.
A full-wave bridge rectifier input structure is used in the power supply of the HandReader,
making the polarity of terminals 1 and 2 irrelevant. Schlage Biometrics recommends using
terminal 1 for positive (+) voltage and terminal 2 for common (-) for consistency. If J12
is used to attach power with the optional Schlage Biometrics wall-mount power supply,
terminal 1 will reflect +13.8 VDC (unregulated) and terminal 2 will be power supply
common.
Neither terminal 1 or terminal 2 is connected to the HandReader ground.
Do not connect a HandKey's power supply to a switched duplex outlet. The HandKey
must have a constant source of power for proper operation.
The HandReader uses an internal switching regulator to obtain internal operational power.
It accepts input voltages from 12 to 24 VDC or 12 to 24 VAC at 50 to 60 Hz. An optional
power-fail protection circuit board can be attached to the main circuit board to provide and
control battery backup. The design of the internal power supply is such that any range of
the above input voltages may be used and still provide proper battery charge voltage and
battery backup operation. Switch-over to battery power is automatic and occurs when the
input voltage falls to approximately 10.5 volts. At that time the internal battery charger is
disabled to save power and uninterrupted operation continues on battery power.
When input power is restored, the HandReader 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 HandReader 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 HandReader 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 HandReader is running off of battery power. This
indicator extinguishes 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 5-1 on page 25) enables or disables battery operation on those
HandReaders equipped with optional battery backup. If a HandReader does not have the
optional battery backup package installed, J7 is not used. On HandReaders 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
HandReader equipped with battery backup, remove or reposition shunt J7 so that the