Orange box input Input couplings Overview ICP Accelerometer

Orange box input

Input couplings • • • Overview ICP Accelerometer Displacement sensor (negative supply) Positive power supply sensor Bipolar sensor Grounding 06 -02 -2022 Name. Etc.

The Orange box input: Multi purpose Every channel floating +12 V V Internal Ref voltages +14 V PWR+ 4 m. A V ~10 M Ω 0 V 500 Ω Hi LO V ~10 M Ω PWR(COM) GND -14 V

Integrated Circuit Piezoelectric (ICP) Accelerometer Constant Current Line Drive (CCLD)

ICP Accelerometer - Constant Current Line Drive (CCLD) +12 V V +14 V PWR+ 4 m. A HI V ~10 M Ω 500 Ω 0 V V LO ~10 M Ω PWR- (COM) Cable shield only if not connected at machine GND -14 V

Vibra. Sens ICP Accelerometer Cable Colour Coding Cable connectors 1 Vibra. Sens 109 with Connector M 12 Shield: Green HI: Pin 4 Black LO: Pin 3 Blue 4 2 3 LO Remember cable pin numbers are mirrored HI

Hansfort ICP Accelerometer

Proximity probe – Displacement Sensor – Eddy current probe COM Measurement Out (Sig) Supply Voltage (-24 V) VT (-DC) 3 wire Applications: Orbit, Shaft Centerline Vibration, Tacho

Displacement Sensor (Negative power supply) +12 V V +14 V PWR+ 4 m. A Hi Out (Sig) ~10 M Ω 0 V 500 Ω COM V V LO ~10 M Ω VT (-DC) PWR- (COM) GND -14 V

Transducer with positive power supply +12 V V VT (+DC) +14 V PWR+ 4 m. A Hi V ~10 M Ω 0 V 500 Ω Out (Sig) COM V LO ~10 M Ω PWR- (COM) GND -14 V

Current measurement (4 m. A – 20 m. A) +12 V Do not connect PWR+ V +14 V PWR+ 4 m. A V ~10 M Ω 0 V 500 Ω Hi V LO ~10 M Ω 4 m. A-20 m. A Signal PWR- (COM) GND -14 V

Velocity probe

Bi – Polar (Velocity Probe, Signal Generator or Buffered Out) +12 V V +14 V PWR+ 4 m. A Hi V ~10 M Ω 500 Ω 0 V V LO ~10 M Ω PWR- (COM) GND -14 V

Grounding is used for • Protective grounding – Avoiding power shock accidents. • Removing of low frequency ”hum” – 50 Hz noise • In some countries 60 Hz – Ground loops • Removing high frequency noise – Introduced into the power network by variable speed motors etc. – Transmitter and radio noise • Anchoring a floating system – ”Floating systems” have a tendecny to float on AC voltage corresponding to half the power supply – Due to high frequency filter

Ground loops Monitor Coax Cable Sensor ~ EG ES EI ~ EG

Traditional ground loop (low frequency) avoidance Monitor Sensor Twisted Pair ~ Screen Isolated (Ground Loop not Established) Sensor Element Isolated ~ EG

Hig frequency filters on input may give half the suply voltage High frequency filter 230 V AC + 115 V AC if not grounded -