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  5. Installation & Operating Manual

Baldor BC141 Installation & Operating Manual

Manual is about: DC CONTROL. DC DRIVE

Summary of BC141

  • Page 1

    5/17 installation & operating manual mn704 bc141, bc142, bc142-5 & bc142-6 dc control.

  • Page 2

    Any trademarks used in this manual are the property of their respective owners. Important: be sure to check www.Baldor.Com to download the latest version of this manual in adobe acrobat pdf format..

  • Page 3

    I mn704 chapter 1 introduction introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 safety notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 4: Chapter 1

    1-1 mn704 chapter 1 introduction introduction thank you for purchasing the bc141, bc142, bc142-5 or bc142-6 full-wave variable speed dc motor control. The control, with surface mount (smt) construction, offers the user the ultimate in reliability and performance at an affordable price. The controls ...

  • Page 5

    1-2 mn704 safety notice continued 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 m...

  • Page 6

    1-3 mn704 table 1-1 electrical ratings catalog number ac line vac (±15%, 50/60hz) motor vdc rating without auxiliary heat sink rating with auxiliary heat sink field vdc (1.13 amps max) max ac line current amps max dc load current amps max power hp (kw) max ac line current amps max dc load current am...

  • Page 7

    1-4 mn704.

  • Page 8: Chapter 2

    2-1 mn704 chapter 2 installation warning: do not use this drive in an explosive environment. An explosion can cause serious or fatal injury. This drive is not explosion proof. Mounting instructions it is recommended that the control be mounted on a flat surface with adequate ventilation. Leave enoug...

  • Page 9

    2-2 mn704 the ac line fuse protects the control against catastrophic failure. If the ac line fuse blows, the control is miswired, the motor is shorted or grounded, or the control is defective. Fuse holders and fuses not supplied with bc142-5. Note: fuse each ac line conductor that is not at ground p...

  • Page 10

    2-3 mn704 permanent magnet (pm) motor connection connect the motor armature positive lead (+) to terminal a+ (armature fuse*) and the negative lead (-) to terminal a-. On catalog nos. Bc142, bc142-5 and bc142-6, be sure jumper j2 is set to the corresponding motor voltage. Be sure the correct plug-in...

  • Page 11

    2-4 mn704 table 2-4 plug-in horsepower resistor® & armature fuse kit selection 90 -130 vdc motors (hp) 180 vdc motors (hp) approximate motor current (adc) plug-in hp resistor and armature fuse kit cat. No. Plug-in hp resistor value (Ω) armature fuse rating (amps) 1/100 1/50 0.2 br1000 1 0.5 1/50 1/2...

  • Page 12

    2-5 mn704 figure 2-4 voltage following connection co nn 1 p2 max en p3 p1 v - + 0 - 9 volts dc (isolated) terminal "p1" terminal "p2" notes: 1. If an isolated signal input is not available, or if using a 4 - 20 ma dc signal input, install the optional plug-on catalog no. Bc152 signal isolator. This ...

  • Page 13

    2-6 mn704 notes: 1. The deceleration time can only be made longer than the normal coasting time of the load. 2. If the bc152, signal isolator option board is installed onto the bc141, or bc142 control, the enable circuit will not funciton as described. If an enable feature is required for the applic...

  • Page 14

    2-7 mn704 seven (7) volt per 1000 rpm tachometer connect the tachometer positive lead (+) to terminal t and the negative lead (-) to terminal i2. Figure 2-8 dc tachometer connection (7 volts per 1000 rpm) b pw r on i2 t dc tachometer - + 7v g 1000 terminal "t" terminal "i2" j2 fifty (50) volt per 10...

  • Page 15

    2-8 mn704 armature switching and dynamic braking if the armature is to be disconnected and reconnected with the ac power applied, connect a relay (or contactor) and a brake resistor (rb) in the armature circuit. The inhibit circuit must be simultaneously activated when braking. Wire a double pole do...

  • Page 16

    2-9 mn704 figure 2-11 motor voltage & dc tachometer selection (jumper j2) catalog no.Bc141 catalog nos. Bc142, bc142-5 and bc142-6 j2 set for 90 volt motor (factory setting) j2 set for tachometer j2 set for 180 volt motor (factory setting) j2 set for 90 volt motor (step-down) j2 set for tachometer j...

  • Page 17

    2-10 mn704 note: readjusting the min trimpot will affect the maximum speed setting. Therefore, it is necessary to readjust the max trimpot if readjusting the min trimpot. It may be necessary to repeat these adjustments until both the minimum and maximum speeds are set to the desired levels. Maximum ...

  • Page 18

    2-11 mn704 3. Run the motor with the maximum load and adjust the ir trimpot so that the motor speed under load equals the unloaded speed recorded in step 2. 4. Remove the load and recheck the rpms. 5. If the unloaded rpm has changed, repeat steps 2 - 4 for more exact regulation. The control is now c...

  • Page 19

    2-12 mn704 table 2-4 troubleshooting guide (without optional forward-brake-reverse switch) symptom possible cause suggested corrective action motor will not run in forward or reverse direction. Faulty wiring or loose connections to the reversing switch. Check and correct connections. Forward-brake-r...

  • Page 20

    Baldor electric company p.O. Box 2400, fort smith, ar 72902-2400 u.S.A., ph: (1) 479.646.4711, fax (1) 479.648.5792, international fax (1) 479.648.5895 www.Baldor.Com © baldor electric company mn704 all rights reserved. Printed in usa. (a40249) - rev e 5/17 mn704-0517.