Baldor MN781W manual III. Setting Selectable Jumpers, AC Line Input Voltage Selection

Models: MN781W

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Note: To eliminate the Start/Stop function, connect RUN and COM terminals with the jumper that is provided. See Figure 7, on page 6.

CAUTION! 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.

F.

Voltage Following Connection – An isolated 0 - 5

FIGURE 8 – VOLTAGE

 

 

Volt DC analog signal can also be used to control

FOLLOWING CONNECTION

 

motor speed. See Figure 8.

 

 

 

 

 

 

 

 

Note: If an isolated signal voltage is not available,

 

0 - 5V DC

 

 

 

 

 

(ISOLATED)

 

 

 

 

an optional signal isolator can be installed (ID5SI-2).

 

+

-

 

 

 

 

Connect the isolated signal voltage to P2 (+) and

 

 

 

 

 

 

 

P1 (-) terminals. The MIN trimpot must be set fully

CON1

 

 

 

 

 

 

counterclockwise.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G. Enable Circuit Connection – The control can also be

 

P3

P2

P1

 

 

 

 

 

 

 

 

 

started and stopped with an Enable circuit (close to

 

 

 

 

 

 

 

start). See Figure 9. The Enable

FIGURE 9 – ENABLE CIRCUIT CONNECTION

 

function is established by wiring a

 

switch in series with the orange

 

 

 

ENABLE

 

 

 

Main Speed Potentiometer lead

 

 

 

 

 

 

 

 

SWITCH OR RELAY

 

which connects to P2 terminal.

 

WHITE (LOW)

(CLOSE TO START)

 

 

ORANGE (WIPER)

 

 

 

 

 

 

When the Enable switch is closed,

 

 

 

 

 

 

 

 

VIOLET (HIGH)

 

 

 

 

 

 

the control will accelerate to the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Main Speed Potentiometer setting.

MAIN SPEED POTENTIOMETER

CON1

 

 

 

 

 

When the Enable switch is opened,

 

 

 

 

 

 

 

 

 

 

 

(BACK VIEW)

 

 

 

 

 

 

 

the motor will coast to stop.

 

 

 

 

P3

P2

P1

 

 

 

 

 

 

 

 

III.SETTING SELECTABLE JUMPERS

The control circuit board has customer selectable jumpers which must be set before the motor control can be used. See Figure 1, on page 3, for location of jumpers.

Note: Disconnect the AC line before changing position of jumpers.

A.AC Line Voltage Selection (J1 and J2) – Jumpers J1 and J2 are both factory set to the “230V” position, for 208/230 Volt AC line input. For 115 Volt AC line input, set both Jumpers J1 and J2 to the “115V” position. See Figure 10.

FIGURE 10 – AC LINE INPUT VOLTAGE SELECTION

 

Control Set for 208/230 Volt AC Line Input

 

 

Control Set for 115 Volt AC Line Input

 

 

 

 

 

 

 

 

 

(Factory Setting)

 

 

 

 

 

 

 

 

 

 

 

 

J1 Set for 208/230 Volt

J2 Set for 208/230 Volt

J1 Set for 115 Volt

J2 Set for 115 Volt

 

 

AC Line Input

AC Line Input

 

AC Line Input

AC Line Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

230V

 

 

 

 

 

 

 

 

 

230V

 

 

 

 

 

 

 

 

 

J1

 

 

 

 

 

 

 

 

 

 

 

J1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

115V

230V

J2

 

 

 

115V

 

230V

J2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

115V

 

 

 

 

 

 

 

 

 

115V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B.Motor Horsepower Selection (J3) – Jumper J3 is factory set to the “1HP” position, for 1HP motors. For motors of lower horsepower, set Jumper J3 to the corresponding position for the motor being used. See Figure 11.

C.Reset Mode Selection (J4) – Jumper J4 is facto- ry set to the "MAN" position, for manual resetting of the control every time the AC line is applied or after a fault condition has occurred (undervoltage, overvoltage, phase-to-phase short circuit and I2t

FIGURE 11 – MOTOR

HORSEPOWER SELECTION

J3 Set for 1 HP Motor

Motor Horsepower

(Factory Setting)

HP, (kW)

 

 

 

 

 

 

 

 

 

 

 

1, (0.75)

 

 

 

 

 

 

 

 

 

 

3/4, (0.5)

 

 

 

 

 

1/2, (0.37)

 

 

 

 

 

1/4, (0.18)

 

 

 

 

 

 

7

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Baldor MN781W manual III. Setting Selectable Jumpers, AC Line Input Voltage Selection

MN781W specifications

The Baldor MN781W is a versatile and robust motor designed for various industrial applications. Known for its high performance and efficiency, this motor is an integral component in diverse sectors, including manufacturing, agriculture, and energy production. Its design emphasizes durability, reliability, and energy efficiency, making it a preferred choice for many professionals.

One of the main features of the Baldor MN781W is its premium efficiency rating, which ensures reduced energy consumption and lower operational costs. This motor meets or exceeds the efficiency standards set by the National Electrical Manufacturers Association (NEMA), contributing to substantial energy savings over its lifespan. When compared to traditional motors, the MN781W not only helps in cutting energy expenses but also supports environmentally friendly initiatives by minimizing carbon footprints.

The MN781W motor utilizes advanced insulation materials and coating technologies, providing enhanced protection against moisture, dust, and other environmental factors. This ensures optimal performance in challenging conditions while prolonging the motor’s life. The unique design of the motor housing and internal components minimizes heat generation, which is essential for extending operational longevity and preventing breakdowns.

In terms of technological features, the MN781W incorporates state-of-the-art bearing designs that reduce friction and enhance overall efficiency. This enables the motor to operate smoothly under heavy loads, which is particularly beneficial in industrial applications requiring consistent performance. Additionally, the motor is equipped with built-in thermal protection, which automatically shuts down the motor in case of overheating, thereby preventing damage and ensuring safety.

Another significant characteristic of the Baldor MN781W is its ease of installation and maintenance. The motor is designed with user-friendly access points for wiring and inspection, allowing technicians to conduct routine checks and repairs with minimal downtime. Furthermore, its modular design supports a range of mounting options, enabling seamless integration into existing systems.

In conclusion, the Baldor MN781W stands out as a reliable, energy-efficient motor that meets the demands of modern industries. With its premium efficiency rating, advanced protection features, and easy maintenance, it is an excellent choice for any business looking to enhance operational efficiency and reduce costs. Whether used in heavy machinery or process equipment, the MN781W ensures optimal performance and reliability, making it a valuable investment in industrial applications.