i950, i750, i700 Hardware: Control of brake module E82ZWBRB via brake output (X106, BD1, BD2) only possible with i950 and i750. Keyword: Measuring pulses
Question:
X106 (BD1, BD2) - 24V holding brake output: can the output be used to indirectly control a 180V / 205V brake via an intermediate brake module E82ZWBRB or E82ZWBRE can be used?
Answer: Servo inverter i950, Servo inverter i750:
Yes, with the i950 and i750 device series dthe control of a brake module 'E82ZWBRB' or 'E82ZWBRE' via the 24V holding brake output (BD1, BD2) of the device is possible if the brake parameters are configured accordingly.
Set parameter 0x2820:23 = [1]. With this setting, the output of the measurement pulses, as part of the brake monitoring functionality, is inactive. See background info on the output of measurement pulses.
In addition, the i950 the possibility to use a digital output to control a brake (function extension From FW V01.02.03): Setting brake parameters: 0x2820:23 = [2].
Servo inverter i700:
No, dthe control of a brake module 'E82ZWBRB' or 'E82ZWBRE' via the 24V holding brake output (BD1, BD2) of the i700 cannot be used by Lenze be permitted, due to the permanently issued measurement. See background information on the output of measurement pulses.
Background info: measurement pulses The servo inverters have brake monitoring, for which measuring pulses of 500 µs duration are output every 100 ms via the holding brake output. These are output continuously, regardless of the setting of the error response of the brake monitoring. With the setting "no reaction" therefore the output of the measurement pulses is not switched off! Only with the i950 and i750 can the output of the measurement pulses be deactivated via corresponding parameterization see above. When directly connection of a 24V brake, as intended, the brief interruptions in the control due to the measurement pulses have no effect, due to the existing inductance of the 24V holding brake. When using an E82ZWBRB or E82ZWBRE brake module, however, the holding brake output is used to control the digital input of the brake module. Its internal transistor (FET) is briefly switched off cyclically so that the brake current is then taken over by the freewheel. During the 500µs switch-off time, a power loss occurs that represents an impermissibly high load for the internal suppressor diodes. It also cannot be ruled out that the brake could be released, even when not activated. Furthermore, parallel impedances to the FET allow such a large current that the optocoupler in the 180V/205V brake module is activated and the brake would thus be permanently released.
