Braking resistor When a Maxi-Maestro drive is used, or the internal braking resistor for a Midi-Maestro is insufficient, the drive requires an external braking resistor. A braking resistor is supplied with the Maxi-Maestro drive. Refer to Figure 3-7 for the dimensions of this braking resistor.Drives are protected against overheating. When the temperature of the heat-sink reaches 95°C, the drive is disabled. When the temperature subsequently falls to below 95°C the drive is automatically re-enabled.
Installing in a sealed enclosure
To maintain sufficient cooling of the drive when it is installed inside a sealed enclosure, heat generated by all the equipment must be taken into account and the enclosure must be of adequate size. The drive must be installed in a vertical position, to ensure the correct airflow is flowing between the cooling fins of the heat-sink. Vertical installation above other drives or any other heat producing equipment may result in overheating.The total power dissipated by drives, chokes, transformers and braking resistors is about 12% of the total of the motor rating.
An additional braking resistor
for the Midi-Maestro drive is connected between pins 24 and 16. Please refer to section 4.8 Braking resistor connections on page 27 for further information. The braking resistor for the Maxi-Maestro is connected between pins 24 and 25. Please refer to section 4.8 Braking resistor connections on page 27 for further information. If using an external braking resistor with the Midi-Maestro, the internal braking resistor must be disconnected. WARNING The supply terminals are not isolated from the control terminals. The AC supply MUST be isolated or have its negative pole grounded.
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----------------------Ruichang Mingsheng Automation Equipment Co., Ltd----------------------
PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module
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Module, redundancy module, power module, relay output module, relay input module, processor module