Servodrives / inverters series COSMOS 301X Installation, use and maintenance manual - EN
5.7.8 Counter input
Some versions of the servo-drive/inverter are equipped with a high-speed digital input to be used as a
counter. It accepts 24V digital signals and can acquire signals with a maximum frequency of 100kHz. The
recommended connection diagram is shown in the following picture:
Since the input stage has a relatively wide passband to allow acquisition of high-frequency signals, it is
particularly susceptible to electrical interference. Therefore, it is recommended to use a shielded cable for
the wiring. In this case, the shield must be connected to earth on both sides, preferably with low-impedance
connection, such as a metal cam; the shield is totally ineffective if it is left floating.
Check the sensor polarity before connection; inverted polarity may damage the sensor
and/or servo-drive.
Ver. 1.09 SMITECdd 48/74
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