Question:
Which devices of the i700 Servo Inverter series have a device fan and how is it controlled?
Answer:
All i700 supply modules and i700 axis modules have a device fan, except for the smallest device (5A single axis).
The device fan is switched on and off for all i700 devices via the measured temperature at the heat sink.
i700 supply modules:
The fan in the analog i700 supply modules is controlled via an analog circuit. The switching thresholds are fixed accordingly:
- Switch-on threshold: 68 °C (fix)
- Switch-off threshold: 61 °C (fix)
i700 axis modules:
In the digitized i700 axis modules, the temperature switching thresholds of the device fans can be set by parameter. However, the adjustment of the switching thresholds is normally not necessary:
- 0x2D84.3: Switch-on threshold: 55 °C
- 0x2D84.4: Switch-off threshold: 45 °C
Hint:
The device fan can be quasi deactivated by entering very high switching thresholds. However, this should only be done in exceptional cases, e.g. when low noise is the priority and the drive controller is not being fully utilized. The lack of cooling capacity when the fan is deactivated leads to a lower utilization of the drive controller and may also affect the service life of the device due to higher thermal load.
To protect the device, when a certain heat sink temperature is reached, the inverter is disabled and the 'Fault' status is changed. A corresponding fault message is output. For analog supply modules, the fault is signaled via the digital fault output:
- i700 supply modules Overtemperature threshold: ON: 92 °C (fix) OFF: 87 °C (fix)
- i700 axis modules Overtemperature threshold: ON: 100 °C (fix)
Keywords: device fan, cooling, noise, heat sink fan
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