GE DS200SSBBG1A CPU module

When the internal braking resistor fitted in the Midi-Maestro is inadequate, a larger resistor may be connected externally, between pins 16 & 24 of the power connector. Also, if the external braking resistor that is supplied with the Maxi-Maestro is inadequate a larger resistor may be used instead. This should be connected between pins 24 & 25 of the power connector. These connections are shown in Figure 4-11 and Figure 4-12. The required value for the braking resistor is determined by the amount of energy to be dissipated, the duty cycle and repetition time, as well as the cooling available for the resistor. When the value and power rating have been calculated, a decision can be made whether to use the internal resistor (fitted as default in the Midi-Maestro) or an external resistor (can be used with both Midi & Maxi drives).

External braking resistor 

When a Maxi-Maestro drive is used, due to the fact that there is no internal braking resistor, an external braking resistor is required. The braking resistor defined below is supplied with the drive.The minimum resistor value has been set to limit the current, through the braking circuit, to protect the drive if a larger rated external braking resistor is required.Electric shock risk The voltages present on the braking resistor, its associated components and terminals on the drive are capable of inflicting a severe electric shock and may be lethal. Thermal overload protection When an external braking resistor is used, it is essential that a thermal overload protection device is incorporated in the braking-resistor circuit in order to minimise the risk of fire in the event of unexpectedly high current, or loss of control of the braking circuit. A typical protection circuit is shown in the following section - Thermal protection of the braking resistor.

Thermal protection of the braking resistor 

When an external braking resistor is used with either a Midi or a Maxi-Maestro, a thermal-protection circuit must be added. This must disconnect the AC supply from the drive if the braking resistor becomes overloaded. (see Figure 4-11 and Figure 4-12 for guidance). When the internal braking resistor is used (Midi-Maestro only) a thermal-protection circuit is not required since the thermal protection in the drive causes the drive to disable when the temperature of the heat-sink reaches 95°C. When the temperature subsequently falls to below 95°C the drive is automatically re-enabled.

 Company product range

----------------------Ruichang Mingsheng Automation Equipment Co., Ltd----------------------

PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module

Network communication module,

Ethernet module, motion control module, analog input module, analog output module, digital input module, digital output

Module, redundancy module, power module, relay output module, relay input module, processor module