Frame size Terminal Torque Bolt sizeDMainsMotor19–40 Nm(168–354 in-lbs) M10Load sharingBrake8.5–20.5 Nm(75–181 in-lbs) M8EMainsMotorLoad sharing19–40 Nm(168–354 in-lbs) M10Brake 8.5–20.5 Nm(75–181 in-lbs) M8FMainsMotor19–40 Nm(168–354 in-lbs) M10Load sharing 19–40 Nm(168–354 in-lbs) M10Brake 8.5–20.5 Nm(75–181 in-lbs) M8Regen 8.5–20.5 Nm(75–181 in-lbs) M8Table 3.14 Torque for terminals3.6 Additional Connections3.6.1 Mechanical Brake ControlIn hoisting/lowering applications, it is necessary to beable to control an electro-mechanical brake:• Control the brake using any relay output ordigital output (terminal 27 or 29).• Keep the output closed (voltage-free) as long asthe frequency converter is unable to ‘support’ themotor, due to the load being too heavy, forexample.• Select [32] Mechanical brake control in parametergroup 5-4* Relays for applications with an electro-mechanical brake.• The brake is released when the motor currentexceeds the preset value inparameter 2-20 Release Brake Current.• The brake engages when the output frequency isless than the frequency set inparameter 2-21 Activate Brake Speed [RPM] orparameter 2-22 Activate Brake Speed [Hz], only ifthe frequency converter completes a stopcommand.If the frequency converter is in alarm mode or in anovervoltage situation, the mechanical brake immediatelycuts in.3.6.2 Parallel Connection of MotorsThe frequency converter can control several parallel-connected motors. The total current consumption of themotors must not exceed the rated output current IM,N forthe frequency converter.NOTICEInstallations with cables connected in a common joint asin Illustration 3.31, is only recommended for short cablelengths.NOTICEWhen motors are connected in parallel, 1-29 AutomaticMotor Adaptation (AMA) cannot be used.NOTICEThe electronic thermal relay (ETR) of the frequencyconverter cannot be used as motor protection for theindividual motor in systems with parallel-connectedmotors. Provide further motor protection withthermistors in each motor or individual thermal relays.Circuit breakers are not suitable as protection.LC filter130BA170.10Illustration 3.31 Installations with Cables Connected in aCommon JointInstallation Operating InstructionsMG37A202 Danfoss A/S © Rev. 2014-07-29 All rights reserved. 353 3