Vanguard Managed Solutions 650 - Manual (Page 22)

1-8 Getting Started
652/654 POTS With/Without Battery Backup
652/654 With POTs and Battery Backup
Rechargeable
Battery Pack The 652 and 654 devices are also available with a 12 volt rechargeable battery
backup pack. This pack consists of ten 1.2 volt NiCd battery cells in a metal carrier.
This enables these units to support POTS and ISDN operation during power failures,
for approximately 2.5 hours of normal telephone use. If both POTS ports are in
continuous use during battery operation, the useful time drops to approximately 1.5
hours. Battery operating time (capacity) is also dependent on the temperature;
battery capacity decreases as temperature increases.
Operation On
Battery Backup To reduce power consumption, during battery operation, the data and modem ports
will not operate. When the battery is in operation, the power LED flashes.
The electric power plug, which connects to the external wall-mounted power supply,
acts as a battery switch. When the power supply transformer is plugged in, the
battery is connected to the circuit, and vice versa.
Recharging Battery
Pack A completely discharged battery pack takes about 14 to 16 hours to fully recharge.
The charging circuit activates every time the unit powers up. After 16 hours of
operation, the charging circuit reduces the current to the batteries to a trickle charge
level to prevent overcharging.
Replacing
Batteries The batteries are shrink wrapped around a metal carrier, installed inside the unit on
the Printed Circuit Board (PCB). A pair of wires connects the battery pack to a
connector on the PCB. The connector is keyed to prevent inserting the connector the
wrong way and reversing the order of the battery pack.
To replace the battery, perform the following steps:
Battery Disposal Please contact the Rechargeable Battery Recycling Corporation (RBRC), at one of
the following telephone numbers, for specific information on the safe disposal and/or
recycling of rechargeable batteries.
• Individual Household Batteries:1-800-822-8837
• Retailers Disposal:1-770-984-0708
Step Action
1 Remove the unit’s cover.
2 Remove the battery connection from the PCB.
3 Remove the screws on the bottom of unit that hold the battery pack in
place.
4 Remove the battery pack.
5 Install a new battery pack by performing these steps in the reverse
order.