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The LIU-4
provides signal conditioning for four 5 wire LVDT positioning sensors. When
the LVDT sensors are being used in latency critical control systems, the
conditioned signals are passed to the host ECU as four 0 to 5V analogue
outputs. Where LVDT sensors are used for diagnostics or where control system
speed is less critical, the signal conditioned values can be made available
over the CAN bus communications link in order to reduce system harnessing.
A
common primary sine wave signal is generated to supply all 4 LVDT sensors.
This prevents beat notes being generated due to stray magnetic coupling when
the LVDT sensors are used in close proximity using similar frequencies. The
frequency and amplitude of the common primary signal are software
programmable. The primary signal to each LVDT is individually buffered such
that an overload on one sensor primary does not affect the other.
The
four 0 to 5V LVDT signal conditioned analogue outputs are individually
software programmable for gain and offset in order to provide more
flexibility for the measurement span. LVDT sensor open circuit diagnostics
are available through the CAN bus communications link.
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Features
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4 off 5 wire LVDT inputs with
ratiometric measurement
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Common primary signal, software
adjustable frequency between 1kHz to 15kHz, and voltage between 0.5Vrms to
3.0Vrms. Maximum output current 20mArms.
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Software adjustable gain and offset for
each signal conditioned output
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Secondary signal input range 1Vrms to
3.5Vrms
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CAN Bus address ID analogue input
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Unit reset input – switch to ground
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4 off 0 to 5V LVDT signal conditioned
analogue outputs, with separate reference ground input
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Internal 16 bit micro controller, 12 bit
resolution ADC, Flash program memory
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LVDT sensor open circuit diagnostics,
unit internal diagnostics including internal temperature
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CAN Bus interface, 1Mbaud standard
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Application
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LVDT sensor signal conditioning
Electro Magnetic Compatibility
Complies with the essential protection requirements of EMC
Directive 204/108/EC
Mechanical
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Case material hard anodised aluminium
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Estimated weight 140g
Connection Definition
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Integral, sealed, Deutsch high density
Autosport series connectors
LVDT connector 23 way ASDD210-23PN
Main connector 11 way ASDD208-11PN
For
pin numbers please consult our Technical
Consultancy service
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