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SKF IMx-8 User Manual

SKF IMx-8
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PRODUCT SPECIFICATIONS
SKF Multilog On-line System IMx-8/IMx-8Plus
SKF Multilog On-line System IMx-8/IMx-8Plus
User Manual
Revision E
47 (63)
o 4 mA constant current
o On/off control, individual per channel
Impedance >100 kΩ
Analogue input voltage range without damage to the IMx is ±28 V
3.2.4 Digital inputs
Two digital inputs, non-isolated, referenced to chassis/enclosure ground
o Accepts positive voltages: up to 24V
Contact SKF for advice if the digital signal may exceed +27 V
o Trigger level: 2.9 V, Hysteresis 0.1 V, Impedance 1.6 kΩ
Can interface to:
o Common 2- or 3-wire speed sensors
o On-line oil debris sensor (Gastops MetalSCAN)
24 V DC sensor supply, maximum, peak demand up to 30 mA per channel
o Peak current demand from the sensor should be no greater than the
limit stated, even if the average demand (e.g. per shaft rotation
period) is less
3.2.5 Digital outputs
Three relay driver outputs
System status (RS), Warning and Alarm (R1 and R2)
24 V DC at 70 mA maximum, available (all, not per relay)
Minimum individual coil resistances: 345 (1 relay), 690 (2 relays) and
1035 Ω (if 3 relays are in use)
3.2.6 Analogue measurement
24-bit A/D conversion
o Enables continuous data capture without gain or AC/DC switching
One A/D converter for each channel
o Simultaneous measurements of all 8 channels (no multiplexing)
o Different channels can operate at different sampling rates
Maximum sampling frequency: 102.4 kHz (though lower for event capture)
Frequency range: from DC to 40 kHz
Dynamic range: 120 dB
Signal to noise ratio: 90 dB
Crosstalk rejection: −110 dB (at 1 kHz)
Amplitude accuracy: ±2% (up to 20 kHz), ±5% (20 to 40 kHz)
Phase accuracy: ±3° (up to 100 Hz)
Automatic detection of sensor fault and cable fault (software configurable)
3.2.7 Digital measurement
Frequency range: 0.016 Hz to 20 kHz (1 cpm to 1.2 Mcpm)
o Note that when used for order tracking, the maximum pulse frequency
is 2.5 kHz
Frequency accuracy: 0.05% of measurement value

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SKF IMx-8 Specifications

General IconGeneral
BrandSKF
ModelIMx-8
CategoryControl Systems
LanguageEnglish

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