Recognition Systems HandPunch 1000, Manual

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Planning an Installation
Page 10
Wiring Two basic circuits typically connect to the HandPunch:
•
Power Input
• HandPunch to Host Computer
-
RS-232
- modem
The minimum wire size for these circuits is AWG 22; the maximum is AWG 18.
Power Input The HandPunch 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. The HandPunch comes with a 120 VAC to 13.5 VDC power
supply (Class 2, Model No. P48131000A010G – 120 VAC, 60 Hz, 21 W, 13.5
VDC output @ 1000mA). An optional 220 VAC to 13.5 VDC power supply is also
available.
To power the HandPunch with this power supply, a 120 VAC (or 220 VAC as
applicable) duplex outlet must be within 5 feet of the HandPunch. The power
supply has a 6-foot cable to provide a comfortable reach between power outlet
and HandPunch. The barrel jack at the end of the power supply’s cable is
connected to J12 on the HandPunch PCB.
Do not connect a HandPunch’s power supply to a switched duplex outlet. The
HandPunch must have a constant source of power for proper operation.
Battery
Backup
Operation An optional power-fail protection circuit board can be attached to the main
circuit board to provide and control battery backup. 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.
The design of the HandPunch’s 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 backup battery charger is disabled to save power, and uninterrupted
operation continues on battery power.
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
WARNING