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Warner Electric • 800-825-9050
P-2105-WE 819-0549 5/17
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Electrical Connections . . . . . . . . . . . . . . . . . . . . .5, 6, 7
Internal Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . .8
Troubleshooting Checklist . . . . . . . . . . . . . . . . . . . . . .9
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Page
Failure to follow these instructions
may result in product damage, equipment damage,
and serious or fatal injury to personnel.
Introduction
Warner Electric’s CBC-300 and CBC-300-1 are constant
current, solid state electronic power supplies designed
to operate any of the Warner Electric 90 Volt clutches
and brakes, including fail safe designs . They can operate
a single clutch or brake, two clutches, two brakes,
a combination clutch and brake, or a combination
clutch and fail safe brake, depending on the switching
arrangement used and the application requirements .
The CBC-300 series controls operate from 120 VAC
single-phase input power . They provide constant current
output as set by the torque adjustment potentiometers
on the front panel or remote potentiometer . On the CBC-
300 series both outputs are adjustable . Output current
ranges are selectable for the adjustable output channels
in one of five ranges by the DIP switches located on the
control’s printed circuit board .
Two versions of the CBC-300 are provided to handle
a wide range of applications . The standard version
is offered the same as before . The CBC-300-1
version is available where an external limit adjustment
potentiometers are required .
Operations of both units are identical except for the
method of the control potentiometer mounting . The
CBC-300-1, external potentiometer option, has terminal
blocks mounted on the PC boards for connection of the
potentiometers .
The potentiometers used can be supplied either as
optional accessory items or be obtained from a local
electronic supply house .
An internal 1 .5A FA fuse is provided for line to ground
shorts .
Two LED indicators are provided on the front panel of
the control for “POWER” and “SHORT” indications .
The green indicator marked “POWER” is illuminated
whenever the AC input power is applied to the control . A
red indicator marked “SHORT” is illuminated whenever
a short circuit condition occurs in either of the outputs .
To reset, power must be removed, the shorted condition
cleared, and the AC input power reapplied to the control .
The enclosed version may be used with or without the
cover . Removal of the plastic cover when the control
is used in an enclosure will increase the operating
temperature range of the control .
