Warner Electric CBC-750 - Manual (Page 3)

3 Warner Electric • 800-825-9050 819-0494
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . 3
Technical Specifications . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
System Wiring
Wiring Precautions . . . . . . . . . . . . . . . . . . . . . 6
AC Input Power. . . . . . . . . . . . . . . . . . . . . . . . 7
Clutch-Brake Wiring . . . . . . . . . . . . . . . . . . . . 7
Switching Inputs . . . . . . . . . . . . . . . . . . . . . . 8
Auxiliary Outputs . . . . . . . . . . . . . . . . . . . . . . 9
Remote Torque Adjust Potentiometers. . . . . 9
System Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . 11
System Troubleshooting . . . . . . . . . . . . . . . . . . 14
Replacement Parts Listing . . . . . . . . . . . . . . . . 16
Warranty . . . . . . . . . . . . . . . . . . . . . . . . Back Page
LIST OF FIGURES
Figure #
1 Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 C/B and Power Terminal Connection . . . . . . . . 7
3 AC Selector Switch. . . . . . . . . . . . . . . . . . . . . . . 7
4 I/O Terminal Connection . . . . . . . . . . . . . . . . . . 8
5 Auxiliary Connection . . . . . . . . . . . . . . . . . . . . . 9
6 Remote Potentiometer Connection . . . . . . . . . 9
7 Terminal Board Overview - Inside . . . . . . . . . 10
8 Main Board Switches - Black Switches . . . . . 10
9 I/O Relationships . . . . . . . . . . . . . . . . . . . . . . . 12
Failure to follow these instructions
may result in product damage, equipment damage,
and serious or fatal injury to personnel.
Theory Of Operation
The CBC-750 Series of controls will operate all
Warner Electric clutches and brakes with the
exception of the 1525 HT. Two devices may be
operated from the control; however, only one
device is energized at a time.
The CBC-750’s operate from either 120, 220, or 240
VAC, 50 or 60 Hertz, line voltage. Input voltage is
switch selectable on the Terminal Block Board. A
transformer converts the AC input line voltage to
the three different voltage levels required for the
controls’ internal functioning.
The control logic circuits operate from a regulated
12 VDC supply, which can also provide output for
external sensor connections via the terminal strip. A
filtered, unregulated supply provides the necessary
voltages for operation of the over-excitation circuits
as follows:
CBC-750-6: 75 VDC
CBC-750-24 and -90: 240 VDC
These voltages vary within the tolerance limits
necessary to maintain steady state currents.
Normally, a brake operating alone is connected to
Channel 1 output and the clutch is connected to the
Channel 2 output when a combination clutch and
brake is used. Other connections are possible.
A green LED located on the control faceplate
illuminates when the adjacent channel is active.
The steady state output to the clutch and brake is
adjusted by either the torque adjust potentiometers
on the control faceplate or optional external torque
adjust potentiometers. A switch on the main logic
board selects local or remote torque adjust.
Short circuit protection is provided on both output
channels. In case of a short circuit, a red LED
indicator illuminates on the control faceplate for
the output channel affected. Activation of the short
circuit scheme turns the output off until the short is
cleared and the reset pushbutton is activated.
Input switching via opto-isolated input circuits allow
for a variety of interface configurations and make
the control PC compatible in all respects. This
means that switching can be accomplished with
either AC or DC signals as well as electromechanical
contact closures.