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As much as necessary, as little as possible: Page 3
- The ROBA-switch adapts the energy requirement for the magnetic coil to the brake operating condition. This means energy savings of up to 75 %.
Integrated DC-side switch-off
Due to its own control input and an integrated DC-side switch-off, the ROBA-switch 24 V takes over control of the entire brake coil without mechanical contactor contacts or relay contacts, directly from the PLC control signal. If the control signal goes to zero, or if the supply voltage is switched off, the coil is automatically switched off DC-side via an electronic switch. The inductivity energy is transformed into heat in the rectifier without spark production or contact consumption.
The optimum control of electromagnetic safety brakes, for example using the ROBA-switch 24 V, saves a great deal of energy and operating costs, lowers the brake operating temperature, increases the lifetime of the magnetic coil and reduces the retardation period when the brakes are closed. The ROBA-switch supplies the closed brake with 24 VDC temporarily for release. After this, it switches to a selectable holding voltage of 6, 8, 12 or 16 VDC. The selectable level of holding voltage offers optimum flexibility for brake control. In this way, for example, a brake with a 24 V coil can be released with nominal voltage and then operated using 12 or 16 VDC holding voltage. On a 12 V coil, there is a further interesting control option The brake is released with overexcitation at doubled nominal voltage in order to achieve the shortest possible switching times n operation, the holding voltage is switched to 6 or 8 VDC. The extended functionality of the new ROBA-switch 24 V is mainly applicable for modern, braking torque-optimised safety brakes and sound-damped designs.