sMICA-ACC

0 – 10 kHz bandwidth accelerometer and temperature
sensor for machine condition monitoring applications.

sMICA-ACC [P/N:72SMICAACCR01]
sMICA-ACC is a vibration and temperature measurement probe. Packaged in a small aluminium housing it consistsof three sensors: a) single axis accelerometer with 0-10 kHz bandwidth and analog voltage output, b) temperature
sensors with I2C interface and c) low-speed triaxial accelerometer with I2C interface. The probe is rated with IP66
ingress protection and -20 to 85 degC temperature range.
Key features:0-10 kHz bandwidth, 50 g range, 25 µg√Hz noise density
Embedded temperature sensor
Fits to MonoDAQ-E-ASI-2-T EtherCAT interface
Typical applications:
Production robot condition monitoring
Machine condition monitoring
Bearing fault detection
Speciﬁcations
General speciﬁcations:Operating temperature
IP rating
Cable lengthConnector
Mounting type
Housing material-20 ... 85 degC
IP66
2m
M8, 8 pin, male
Vertical, M6 thread
Aluminum, hard anodized

Speciﬁcations of the single axis vibration accelerometer inside the sensor probe:Min.
Measurement range
Bandwidth (+-10%)
Noise density
0g Oﬀset error (-40...125 degC)
Nominal sensitivity
Sensitivity change due to temperature (0...85 degC)
Linearity error
Crossaxis sensitivity
Sensor module weight
Supply voltage

Typ.
50*
0-10
25
540
+-2
0.1

-1Max.

+140
5Unitg
kHzµg/√HzgmV/g%% FS%gramV

Sensitivity deviation over frequency - the graph below shows the sensitivity variation over frequency with respect
to the sensitivity at 1000 Hz at which the accelerometer is calibrated. The 95% low and high curves show the limits
within which 95% of tested accelerometers are performing.
Version 1.3

sMICA-ACC
sMICA-ACC Sensitivity Deviation over Frequency

Speciﬁcations of the temperature sensor inside the sensor module (I2C):
Measurement range
Accuracy (-40 ... 85 degC)
Resolution
Supply voltage

Min.
-40

Typ.

Max.
125+-310
3.3

UnitdegC
degC
bits
V

Speciﬁcations of the 3-axis MEMS accelerometer inside the sensor module (I2C):
Measurement range*
Sample rate
Resolution
0g Oﬀset error
0g Oﬀset temp. drift
Sensitivity variation
Linearity error
Crossaxis sensitivity
Supply voltageMin.
2Typ.

Max.
16*

1**
10-250250+-1.2+-10+-0.5-1+1
3.3

Unitg
Hzbitsmg
mg/°C%% FS%
V*default range is 2 g, contact jp@HARTING.com if diﬀerent range is desired**higher sample rates are possible, contact jp@HARTING.com if higher sample rate is desired

Principle of operation – single axis analog output accelerometer with 10 kHz bandwidth
The accelerometer requires 5 V excitation voltage on the +5VA pin and outputs analog voltage on the Vout pinaccording to the speciﬁed sensitivity (mV/g). The sensitivity is ratiometric to the excitation voltage. Eachaccelerometer is shipped with the calibrated sensitivity information at 5.00 V excitation voltage. If the excitation
voltage is lower in the user application, the sensitivity will also be lower accordingly. The accelerometer outputs½ of the excitation voltage at 0 g. Keep in mind the 0 g drift speciﬁcation – the accelerometer may not be used for
accurate static acceleration measurements due to large oﬀset drift.
Version 1.3

sMICA-ACC

Calibration options – single axis analog output accelerometer with 10 kHz bandwidth
Each sensor probe’s sensitivity is factory calibrated at 1000 Hz. The calibrated sensitivity is supplied with the probe
and written inside its I2C EEPROM memory. Frequency response over the 0-10 kHz spectrum is according to thespeciﬁcation in this datasheet. Optionally the probe can be ordered with the accredited calibration certiﬁcate.
Principle of operation – triaxial MEMS accelerometer and temperature sensor
The additional two sensors inside the sMICA-ACC probe use the I2C interface. 3.3 V supply voltage is required
if I2C sensors are to be used.
Connector type and pinout
The probe features a direct cable output. Standard cable length is 2 m. Cable end connector is an M8 male threadplug with male pins.

Pin 1 (blue): connection checkPin 2 (White/Blue): +5VA (5 V analog voltage supply / excitation)
Pin 3 (Orange): Vout (accelerometer analog voltage output)
Pin 4 (White/Orange): GNDA (analog GND)
Pin 5 (Green): I2C SCL
Pin 6 (White/Green): +3V3 (3.3 V digital power supply for I2C)
Pin 7 (Brown): I2C SDAPin 8 (White/Brown): GNDD (digital GND)
Mechanical drawing

Version 1.3

sMICA-ACC

Customer testimonial» sMICA-ACC gives us a ﬂat frequency response up to 10 kHz which evenmuch more
expensive accelerometers ﬁnd diﬃcult to match. This presents an ideal widescale
solution for early failure detection in our predictive maintenance applications inautomotive industry production lines.«
Kenji Nogata, HARTING K.K.

Version 1.3