Baldor NEMA-4X, Installation And Operation Manual

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5   IMPORTANT APPLICATION INFORMATION 

 WARNING! DO NOT USE THIS DRIVE IN AN EXPLOSIVE ENVIRONMENT. AN 

 EXPLOSION CAN CAUSE SERIOUS OR FATAL INJURY. THIS DRIVE IS NOT EXPLOSION 
 PROOF. 

 5.1 

Motor Type –

 The BC-154 / BCWD140 is designed for Permanent Magnet (PM), Shunt     

 Wound and  Universal  (AC/DC) motors. Use  of higher voltage motors will result in     
 reduction of available maximum  (MAX) speed (Trimpot  Adjustment). Also, if motor is not an  
 SCR  rated type, the actual AC   line amperage at full load  should not exceed the motor's     
 DC nameplate rating. 

5.2

Torque Requirements

 – When replacing an AC induction motor with a DC motor and           

   speed  control, consideration must be given to the maximum torque requirements. The full   
   load  torque  rating of the DC motor must be equal to, or greater than, that of the AC motor. 

5.3

Acceleration Start –

 The BC-154 / BCWD140 contains an adjustable acceleration start 

 feature that allows the motor to smoothly accelerate from 0-full speed over a time period of 
 0.5 to 4 seconds. 

5.4

Limitation in Use –

 The BC-154 / BCWD140 controls are designed for use on machine 

applications. 

CAUTION!  - Be sure the BC-154 / BCWD140 is used within its maximum ratings. Follow all 
installation instructions carefully 

(Refer to Sections 3 and 4, on pages 15 and 16). 

6   SETTING SELECTABLE JUMPERS 

The BC-154 / BCWD140 has customer selectable jumpers which can be changed to 
accommodate various applications. 

Jumpers must be set before the control can be used.

 See 

Figure 3, on page 14 for location of jumpers.  
 

6.1 

J1 - Speed and Torque Mode - 

Set J1, in according to the application               

  requirements. Refer to Section 6.1.1. 

Note: Factory setting for J1 is Speed mode. 

6.1.1 Control 

Mode 

– 

Speed 

(SPD) 

or Torque (TRQ). 

When Jumper J1 is placed in the "SPD" position the 
drive will control motor speed as a linear function of 
the main potentiometer setting, or analog voltage 
input. The range of output speed can be adjusted 
with the MIN and MAX trimpots. The motor will 
maintain the preset speed as long as the maximum 
load does not exceed the current limit set point. If the 
motor load exceeds the current limit setting, the 
Overload LED will turn on and the motor will stall. 
See Figure 12, Figures 13 – 16, on pages 24 and 25, which illustrate Motor Speed and 
Torque Modes. 

FIGURE 12 - 

J1 (CONTROL MODE) 

TRQ         SPD

J1