24 channels of two-, three- or four-wire high-accuracy PT100, PT200, PT500 or PT1000 measurement channels

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RTD Measurement for VMEbus – VME390

The VME390 features 24 two, three or four wire high-accuracy PT100 measurement channels. Each channel has programmable alarm limits on which an interrupt can be issued.
Quad. local DSPs (TMS320C203) perform linearization, auto-calibration and alarm-limit checking. Sensor-data is available in °C, °F, K and Ohms. All inputs are optically isolated from the system.
This VMEbus board has a 6U form and is also available as 3U VMEbus board.


Sigma/Delta ADC with 16-bit resolution
Excitation current: 1mA
PT100 linearization (IEC751-1983, DIN43760-1980, JIS C1604-1989)
Programmable minimum/maximum value alarms
Auto calibration
No potentiometers
Analog front-end is optically isolated
On-board DC/DC converter for isolated power supply
Data acquisition handled by TMS320C203 DSP, transparent for user
Measurement values continuously updated in dual-ported SRAM
Measurement range: -200°C .. +850°C
Up to 7.5Hz output update rate


VME390 datasheet – product datasheet