Model DI-5B43-01

Description

Each DI-5B43 displacement transducer module provides a single channel of displacement transducer input which is filtered, isolated, scaled, and converted to a high level analog voltage output (see block diagram). This voltage output is logic switch controlled, which allows these modules to share a common analog bus without the requirement of external multiplexers. The DI-5B modules are designed with a completely isolated computer side circuit which can be floated to ±50V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin to I/O Common, pin 19.

The DI-5B43 can interface to DC displacement transducers and other devices which require a precision 10VDC supply and produce a high level output. The 1kHz bandwidth significantly reduces ripple and noise inherent in these devices.

Transducer excitation is provided from the module by a very stable 10V source. The excitation supply is fully isolated, allowing the amplifier inputs to operate over the full range of the excitation voltage. This feature offers significant flexibility in real world applications. Ten full scale input ranges are provided, from ±1V to ±10V, producing ±5V full scale output.

The input signal is processed through a preamplifier on the field side of the isolation barrier. This preamplifier has a gain-bandwidth product of 5MHz and is bandwidth limited to 1kHz. After amplification, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%. Special input circuits on the DI-5B43 module provide protection of the signal inputs and the isolated excitation supply up to 240VAC.

Accessories

Specifications

Input
Input Range:	±1V
Input Bias Current:	±0.05nA
Input Resistance:	Normal: 2MΩ (minimum) Power Off: 2MΩ (minimum) Overload: 2MΩ (minimum)
Input Protection:	Continuous: 240Vrms max Transient: ANSI/IEEE C37.90.1-1989
Excitation Voltage, Vexc	+10.0Vdc ±2mV
Excitation Current:	40mA (maximum)
Excitation Load Regulation:	±5ppm/mA
Excitation Stability:	±15ppm/°C
Isolated Excitation Protection:	Continuous: 240Vrms max Transient: ANSI/IEEE C37.90.1-1989
CMV, Input to Output:	Continuous: 1500Vrms max Transient: ANSI/IEEE C37.90.1-1989
CMR (50Hz or 60Hz):	100dB
NMR (-3db at 1kHz):	120db per decade above 1kHz
Accuracy:	±0.1% Span ±10µV RTI (Includes nonlinearity, hysteresis and repeatability; RTI=Referenced to Input)
Nonlinearity:	±0.02% Span
Stability:	Input Offset: ±20µV/°C Output Offset: ±40µV/°C Gain: ±50ppm/°C
Noise:	Input, 0.1Hz to 10Hz: 0.4µVrms Output, 100kHz: 5mVp-p
Bandwidth, -3dB:	1kHz
Response Time, 90% Span:	750µs
Output Range:	±5V
Output Resistance:	50Ω
Output Protection:	Continuous Short to Ground
Output Selection Time: (to ±1mV of Vout)	6µs at Cload = 0 to 2000pF
Output Enable Control:	Max Logic “0”: +0.8V Min Logic “1”: +2.4V Max Logic “1”: +36V Input Current, “0,1”: 0.5µA
Power Supply Voltage:	+5VDC ±5%
Power Supply Current:	200mA full excitation load 100mA no excitation load
Power Supply Sensitivity:	±200µV/% RTI
Environmental:	Operating Temperature: -40ºC to +85ºC Storage Temperature: -40ºC to +85ºC Relative Humidity: 0 to 90% Noncondensing RFI Susceptibility: ±0.5% Span Error at 400MHz, 5W, 3ft
Mechanical Dimensions:	2.28" × 2.26" × 0.60" (58mm × 57mm × 15mm)

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