Planning an Installation
10
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.
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.
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.
Wiring
Power Input
NOTE
Battery Backup
Operation
