Baldor BC140, Installation & Operating Manual

Page: 5 / 20

1-1 MN703
Chapter 1
Introduction
Introduction
Thank you for purchasing the BC140™ / BC140-FBR, full-wave variable speed DC motor controls.
Baldor is committed to providing total customer satisfaction by producing quality products that are
easy to install and operate. The BC140 and BC140-FBR offer the user the ultimate in reliability and
performance at an affordable price.
The BC140 and BC140-FBR are able to handle both 115 and 208/230 Volt AC line inputs. In addition,
one model can be used on a wide range of motors by selecting and inserting the appropriate Plug-in
Horsepower Resistor®.
The standard model, BC140, controls all motors through 3/4 HP at 115 Volt AC line input and 1-1/2 HP
at 230 Volt AC line input. By installing the Auxiliary Heat Sink (see Table 1-2), the horsepower range
is increased to 1 HP at 115 Volt AC line input and 2 HP at 230 Volt AC line input. The versatility of the
control is enhanced with the optional Forward-Brake-Reverse Switch Kit (Catalog No. BC144)*.
*Note: Forward-Brake-Reverse Switch Kit, BC144, is factory installed on the BC140-FBR model.
The electronics for the BC140 and BC140-FBR consist of a patented speed control module. Its field-
proven reliability is confirmed by over 100,000 controls presently in operation. The module is housed
in a rugged metal enclosure not plastic. Keyhole slots facilitate mounting and an easily accessible
terminal block simplifies connections.
SAFETY NOTICE
A Warning statement indicates a potentially hazardous situation which, if not avoided, could result in
injury or death.
A Caution statement indicates a potentially hazardous situation which, if not avoided, could result in
damage to property.
A Note indicates additional information that is not critical to the installation or operation.
WARNING: This equipment may contain voltages as high as 1000 volts! Electrical shock can cause serious or fatal
injury. Only qualified personnel should attempt the start-up procedure or troubleshoot this equipment.
WARNING: Be sure the system is properly grounded before applying power. Do not apply AC power before you ensure
that all grounding instructions have been followed. Electrical shock can cause serious or fatal injury.
WARNING: Electrical shock can cause serious or fatal injury. Be sure that all power is disconnected and there is
no voltage present from this equipment or equipment to which it is or will be connected. Electrical
shock can cause serious or fatal injury. Only qualified personnel should attempt the installation and
start-up procedures.
WARNING: Electrical shock can cause serious or fatal injury. Verify there is no voltage phase-to-phase or phase-
to-neutral at the motor leads before connecting motor to this control. Motor may have high voltage
present even when disconnected from this control.
WARNING: Do not use motor overload relays with an automatic reset feature. These are dangerous since the
process may injure someone if a sudden or unexpected automatic restart occurs. If manual reset
relays are not available, disable the automatic restart feature using external control wiring.
WARNING: This unit has an automatic restart feature that will start the motor whenever input power is applied
and a RUN (FWD or REV) command is issued. If an automatic restart of the motor could cause injury to
personnel, the automatic restart feature should be disabled.
WARNING: Using a jumper to eliminate the start/stop function will cause the motor to run at the Main Speed
Potentiometer setting when the AC line is applied.
WARNING: If possible, do not adjust trim pots with the main power applied. Electrical shock can cause serious or
fatal injury. If adjustments are made with the main power applied, an insulated adjustment tool must
be used to prevent shock hazard and safety glasses must be worn.
WARNING: Do not use this drive in an explosive environment. An explosion can cause serious or fatal injury.
This drive is not explosion proof.
WARNING: When the Enable jumper is installed, the drive and motor will start and run when AC power is applied,
when power is restored after a momentary power loss, or after an overload or TCL fault is reset. The
user must ensure that automatic start up of the driven equipment will not cause injury to operating
personnel or damage to the driven equipment. The user is responsible for providing suitable audible or
visual alarms or other devices to indicate that the drive may start at any moment. Failure to observe
this warning could result in severe bodily injury or loss of life.