Frontends

Heim Systems - Dic24

DIC24 Heim2 Heim3 Click to enlarge

The Signal Modules provide the interface to the different signal sources to be measured. A range of individual Signal Modules can be used for signal conditioning of different sensors or data sources. A maximum of 24 channels can be connected to one Signal Module. Visualisation of the input signals is carried out by means of a display and overload LED’s. The display ensures the identificatin of the module within a decentralised configuration by displaying the selected unique module number.

The Signal Module performs the signal conditioning and the A/D conversion (24bit). Each channel is completely independent and consists of sensor support (power), amplifier, A/D converter, anti aliasing filter and optional high or low pass filter. In view of accuracy, measurement speed, and noise characteristic the Signal Modules represent “State-of-the-art” technology. The digital and the analogue module parts and the power voltage input part are galvanic isolated to remove the noise introduced by potential differences. All modules have their own power supplies as well as their own calibration units. The low power consumption of a Signal Module and the enhanced cooling technology avoids the integration of fans in the Signal module which is a big advantage especially for acoustic measurements.
The sample rate can be set for each module individually. A special 6 channel module feature is the overload detection. An overload situation will be detected by means of a comparator already before the A/D conversion. Also one channel can be used as signal channel or a RPM channel. One Signal Module can be connected directly to the USB interface of a PC.

General:
Number of Channels : 24
Sampling Frequency (Fs ) : up to 50 kHz, settable in steps of 10 Hz. Each module can work with an own sampling frequency,
                                              which is a binary divider of system FS
Bandwidth : to max. 20 kHz (settable)
Sampling Ratio : 2.5; no mirroring effect
Dynamic Range (SFDR) : > 90 dB at 0dBV Range in DATaRec 3 Mode
Analogue to digital converter : 24 bit
Data resolution : 16 bit ( DATaRec 3 Mode ) or
                             32-bit*( DATaRec 4 Mode ), selectable
THD : <-90 dB at 0dBV Range
Phase Accuracy : <0.2°
AC Accuracy : ±0.1 % or ±1 mV
DC Accuracy : ±0.1 % or ±1 mV
Input impedance : 1 M Ohm
Signal Level : ±10mV peak to ±10V peak
Coupling : AC (-3dB at 0.75 Hz typical)
ICP power : 22V DC, 4 mA constant current
TEDS sensor identification : IEEE 1451.4 standard for all 24 channels
RPM channel : channel 24 is useable as RPM input
RPM sampling frequency : DATaRec 3 – Mode :16 x Fs ( max. 800 kHz )
Threshold level : 0 – 100% in 5 % steps of the selected amplifier step
Mode : Single Ended
Connector : 1 * 50 pin D-sub
Dimensions : 48.1x 184 x 124,5 mm (w x h x d) including fixing system
Weight : 1100 g typical
Cooling : no fan
Power consumption : 15 watts typical
Power input range : 17 up to 28 voltages
Input DC Power : Low Power detection
Communication : built-in USB 2.0, RS-232 and high speed Link interfaces

Functions:
Integrated calibration unit : 1 ppm reference Calibration
Galvanic isolation : yes
Max. isolation voltages : power input (48 voltage)
                                         digital / analogue part (48 voltage)
Input channel voltage safety : ± 35 V peak

Environmental specifications:
Vibration : 5g
Shock : 10g
Operating temp. : -30°C - +65°C
Storage temp. : -40°C - +90°C
Humidity : 0 - 95% relative, non-condensing