Baldor MN1851 manual Optional M-Contactor Connections

Figure 3-13 Optional M-Contactor Connections

U V W

* M M M

V W	Note 1
	Note 2

UG

*Motor

	* M-Contactor	* RC Device
To Power Source		Electrocube
(Rated Coil Voltage)		RG1781-3

For three phase controls, this is labeled “PE”.

*Optional components not provided with control.

*X3

M Enable

Note: Close “Enable”

9 after “M” contact closure.

M=Contacts of optional M-Contactor

Notes:

1.Use same gauge wire for Earth ground as is used for L and N. (VDE (Germany) requires10mm2 minimum, 6AWG).

2. For UL installations, connect motor ground to of the control as shown.

For CE installations, connect motor ground to the enclosure backplane (see Figure 3-12).

Motor Thermostat A relay contact can be used to isolate the motor thermostat leads for use with other devices, shown in Figure 3-14. The thermostat or overload relay should be a dry contact type with no power available from the contact. The optional relay (CR1) shown provides the isolation required and the N.O. contact is open when power is applied to the relay and the motor is cold. If the motor thermostat is tripped, CR1 is de-energized and the N.O. contact closes.

Connect the External Trip Input wires (N.O. relay contact) to a PLC or other device. Note that a machine input may be used and the PLC software of the Lin+Drive can define the thermal protection. Do not place these wires in the same conduit as the motor power leads.

Figure 3-14 Motor Temperature Relay

Customer Provided

Source Voltage

*

CR1

VW G

UMotor Thermostat Leads

*Linear Motor

Note: Add appropriately rated protective device for AC relay (snubber)

or DC relay (diode).

External Trip

Do not run these wires in same conduit as motor leads or AC power wiring.

*Optional, customer provided hardware.

X1 Dynamic Brake Resistor An external DB (dynamic brake or regen resistor) resistor may be required to dissipate excess power from the DC bus during motor deceleration operations. Some controls have an internal resistor. For selection of the DB resistor, refer to the specifications located in Section 7 and the regeneration resistor specifications in Section 9 of this manual. DB hardware is connected at R1 and R2 terminals of the X1 connector, Figure 3-9 and 3-10.

MN1851 Receiving & Installation 3-11