Delphin ProfiMessage, Руководство по оборудованию

Страница: 238 / 322

Profi Message
Channels can be individually scaled. Scaling takes place in the required unit (e.g.
0 to 100 µm for distance/proximity sensors or 0 to 50 g for acceleration sensors)
Application
Analogue outputs are used as monitors for specific measurement data (e.g. rota-
tion speed or vibration amplitude). Also as signal generators (z. B. set-point
ramp).
9.1.5.4
Digital inputs
Properties
4 digital inputs. Potential isolation up to 2.5 kV. Polarity prtection up to 1 kV.
Low level 0 … 1.5 V/ 0 ... 1.5 mA. High level 3.5 ... 90 V / 3 mA.
Refresh rate
Digital inputs are sampled at 1 kHz (1 ms). The minimum pulse width of a signal
that can be analysed is 1 ms. Recommended pulse width is >2.5 ms. Maximum
continuous signal frequency is 50 Hz.
Application
Digital inputs are used as trigger sources with simultaneous frequency or rotation
speed (for rotating machinery) measurement and phasing (reference) acquisition
are simultaneously carried out.
9.1.5.5 Counter
Properties
2 or 4 digital inputs (see above) are each equipped with 16-bit counters. Choice of
pulse counting in the 0 to 65535 range, or frequency measurement in the 0.2 Hz
to 30 kHz range. Automatic switching of measurement mode at 100 Hz
Refresh rate
Counters are sampled at 4 Hz (250 ms). The minimum pulse width of a signal that
can be analysed is 0.02 ms. Recommended pulse width is >0.1 ms.
Frequency measurement precision
Basic accuracy is ±1 % of the input frequency up to 100 Hz and ±1 Hz above
100 Hz.
Application
238
Delphin Technology AG
Dezember 2015
Profi Message Manual