Delphin ProfiMessage, Hardware Manual

Page: 237 / 322

Profi Message
AC coupling
The differential input is factory set as DC-coupled. Switching to AC coupling is pos-
sible using DIP switches on the signal conditioning board. The DC part of a signal
is eliminated through a HW-filter. Cut-off frequency is around ca. 4 Hz.
The DC part of a signal can also be eliminated through a SW-filter (i.e.through the
DSP).
Scaling / sensor compensation
Channels can be individually scaled. Scaling takes place in the required unit (e.g.
± 100 µm for distance/clearance sensors or ±50 g for acceleration sensors). Zero
offset/correction and amplification adjustment can be performed using sensor
compensation.
Anti-aliasing filter (SW)
The (SW) anti-aliasing filter's frequency limit is set automatically at 40 % of the
sampling frequency setting. This filter is optional. It is a digital deep pass of the
8th or 4th order with Butterworth characteristic.
Application
Analogue inputs deliver continuous or event-triggered recording of vibration sig-
nals or of signals requiring rapid sampling.
9.1.5.3 Analogue outputs
Properties
2 analogue outputs. Voltage range 0 to 10 V. Resolution 12 bit and 2.4 mV.
Board V2.0x: Output range restricted to 0.3 V to 9.7 V.
Board V2.1x: Output range 0 to 10 V.
Max. load of 4 mA at min. 2.5 k
Ω
.
Refresh rate
Determined by source channel (e.g. set-point channel).
Typical rates are 0 to 10 Hz. Dependent on DSP load.
Precision
DC precision is factory set using calibration and adjustment.
Basic precision is ±0.25 % of the output range, i.e. ±25 mV.
Scaling
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Delphin Technology AG
Dezember 2015
Profi Message Manual