Renishaw SP25M Installationsanleitung Seite 42

SP25M installation and integration guide
www.renishaw.com
Probe signals
Renishaw strongly recommends that SP25M be integrated using either the AC3 card or UCC controller. However, for those OEMs who wish to
integrate without them, the following information is provided to assist in dealing with the probe outputs.
Grounding arrangement
The SP25M has two 0 V connections, 0 V power and 0 V reference. It is recommended that they are connected to a star point in the interface
and kept separate from the probe screen as shown below.
The 0 V power is used to power the internal circuitry and transducers
The 0 V reference is a signal from which the outputs are referenced
Screening
It is recommended that the screening arrangements are based on the Faraday cage principle with the screen being continuous throughout the
system. The SP25M connector shell is connected to the body of the probe.
Power supply filtering
The power supply to the probe should be filtered as close to the interface output connector as possible to reduce the output noise to <20 mV
RMS in the frequency range 0 kHz to 7 kHz.
Measurement signal filtering
The input bandwidth is 700 Hz. The measurement signals should be filtered as close to the interface connector as possible to stop high
frequency noise getting into the interface. It is recommended that a first order filter with a 3 dB cut-off frequency of ~700 Hz is used.
Issued 12 2021
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