Telephone Line; Power - ACC RC-85 Owner's Manual

RC-85 Repeater Controller Owner's Manual

Telephone Line

The RC-85 controller may connect directly to the telephone line through
connector J2. The controller is not polarity sensitive. Since all the autopatch,
autodial, reverse patch, and control over the phone line functions are handled by
the controller, connection to the phone line enables all these capabilities.
Note: Depending on your telephone service, you may require a protective
coupler to comply with FCC Part 68 regulations.

Power

The RC-85 controller will operate from a supply voltage of 11.5 to 15 volts dc.
Since the circuitry is primarily low power, high performance CMOS, its current
requirements are less than about 200 mA. Low power single supply operation
means it's easy to battery backup, along with the rest of your repeater, to keep it
available in case the primary supply goes away. It also means that primary
power can be borrowed from the existing system 12 volt supply. Good system
design suggests avoiding unnecessary duplication of power supplies in the
repeater system, so it shouldn't be necessary to dedicate a supply to the
controller.
Inputs for your primary supply and an optional backup battery are provided at
connector J1. The inputs are diode isolated so that the battery is normally
isolated from the load through a back biased diode until the primary supply goes
away, at which time the battery instantly begins supplying the power. The
battery is only necessary to continue operation of the controller - remotely
programmed information is stored in non-volatile memory and does not require
battery backup. The controller does not provide trickle charging to the battery.
Two ground signals are located at the connector - one for the digital circuitry and
the other for the analog circuitry. It's best to connect seperate wires from each
ground back to the supply's ground to prevent digital noise from entering the
audio signals. BOTH GROUNDS MUST BE CONNECTED TO THE
SUPPLY GROUND.
(Installing in Your Repeater) 2 - 4 V3 4/87