Warner Electric CBC-300C Dual - Manual (Page 2)

2 Warner Electric • 800-825-9050 P-269-1
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical Connections . . . . . . . . . . . . . . . . . . . 6
Internal Adjustments . . . . . . . . . . . . . . . . . . . 11
Troubleshooting Checklist . . . . . . . . . . . . . . . 12
Warranty . . . . . . . . . . . . . . . . . . . . . . Back Page
Failure to follow these
instructions may result in product dam-
age, equipment damage, and serious or
fatal injury to personnel.
Introduction
Warner Electric’s CBC-300 series Constant
Current Clutch Brake Controls are 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. Additionally, on some
versions a level adjust can be used to set the
operating level with the torque adjustment
setting the maximum current level. 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.
Several versions of the CBC-300 are provided to
handle a wide range of applications. These
include both enclosed and chassis mount
versions for mounting in an external enclosure
or control panel. The standard version is offered
the same as before, but with the chassis version
added. The CBC-300-1 and CBC-300-C1
versions are being offered where an external
limit adjustment potentiometers are required.
The CBC-300-2 and CBC-300-C2 versions
maintain the limit adjust potentiometers on the
PC board but allow for an external
potentiometer for level adjustment of the output.
This allows the output to be controlled from zero
to maximum level on both the current adjusted
output channels. The CBC-300-3 and
CBC-300-C3 allow for both the current limit and
level adjustment potentiometers to be mounted
remotely.
Operations of all units are identical except for
the method of the control potentiometer
mounting. All units that have external
potentiometer options have 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.
No protection is provided for line to ground
shorts because the unit is not isolated.
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.
The chassis mount version does not have a
cover and must be mounted in an enclosure or
control panel.