Impulse 8B43 User Manual

SensorLex® 8B Isolated Analog Signal Conditioning Products

8B43

DC LVDT Input Modules

Description

8B modules are an optimal solution for monitoring real-world process signals and providing high-level signals to a data acquisition system. Each 8B43 module isolates, filters, and amplifies a voltage input signal and provides an analog voltage output.

The 8B43 can interface to transducers that will operate on a 10V excitation voltage and up to 30mA of excitation current.

Signal filtering is accomplished with a 5-pole filter optimized for time and frequency response which provides 100dB per decade of normal-mode rejection above 1kHz. One pole of this filter is on the field side of the isolation barrier for anti-aliasing, and the other four are on the system side.

A special input circuit on the 8B43 modules provides protection against accidental connection of power-line voltages up to 240VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.

Isolation is provided by transformer coupling to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.

The modules are designed for installation in Class I, Division 2 hazardous locations and have a high level of immunity to environmental noise.

Features

• Interfaces to DC Linear Voltage Displacement Transducers

• High-Level Voltage Outputs

• 1500Vrms Isolation

• ANSI/IEEE C37.90.1 Transient Protection

• Input Protection to 240VAC Continuous

• 100dB CMR

• 1kHz Signal Bandwidth

• ±0.05% Accuracy

• ±0.02% Linearity

• Low Drift with Ambient Temperature

• CE Compliant

• C-UL-US Listed

• ATEX Compliance Pending

• Mix and Match Module Types on Backpanel

Figure 1: 8B43 Block Diagram

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SensorLex® 8B Isolated Analog Signal Conditioning Products

Specifications

Typical at TA=+25°C and +5V power

Module 8B43

Input Range ±1V to ±5V Input Bias Current ±0.05nA Input Resistance

Normal 2MΩ (minimum) Power Off 2MΩ (minimum) Overload 2MΩ (minimum)

Input Protection

Continuous Transient ANSI/IEEE C37.90.1

Excitation

Voltage +10V ±5mV Current 5mA min, 30mA max Load Regulation 15ppm/mA Stability 50ppm/°C Protection 120VAC

CMV, Input to Output 1500Vrms max Transient, Input to Output ANSI/IEEE C37.90.1 CMR (50Hz or 60Hz) 100dB NMR (-3dB at 1kHz) 100dB per decade above 1kHz

Accuracy Linearity ±0.02% Span Stability

Offset ±25ppm/°C Gain ±100ppm/°C

Noise

Output, 100kHz 500µVrms Bandwidth, –3dB 1kHz Response Time, 90% Span 550µs

Output Range See Ordering Information Output Protection Continuous Short to Ground

Transient ANSI/IEEE C37.90.1 Power Supply Voltage +5VDC ±5%

Power Supply Current 160mA Full Exc. Load Power Supply Sensitivity ±100ppm/%

Mechanical Dimensions 1.11" x 1.65" x 0.40"

(h)(w)(d) (28.1mm x 41.9mm x 10.2mm) Environmental

Operating Temp. Range –40°C to +85°C

Storage Temp. Range –40°C to +85°C

Relative Humidity 0 to 95% Noncondensing Emissions EN61000-6-4 ISM, Group 1

Radiated, Conducted Class A Immunity EN61000-6-2 ISM, Group 1

RF Performance A ±0.5% Span Error

ESD,EFT Performance B

NOTES: (1)240VAC between +Input terminal and –Input, +EXC, or –EXC terminals.

120VAC between –Input and +EXC or –EXC terminals. 120VAC between +EXC and –EXC terminals.

(2) Includes linearity, hysteresis and repeatability.

(1)

(2)

240VAC

±0.05% Span

Ordering Information

Model Input Range Output Range

8B43-01 –1V to +1V 8B43-02 –2V to +2V –5V to +5V 8B43-03 –3V to +3V –5V to +5V 8B43-04 –4V to +4V 8B43-05 –5V to +5V –5V to +5V

8B43-11 –1V to +1V 0V to +5V 8B43-12 –2V to +2V 0V to +5V 8B43-13 –3V to +3V 0V to +5V 8B43-14 –4V to +4V 0V to +5V 8B43-15 –5V to +5V 0V to +5V

–5V to +5V

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