Impulse 8B43 User Manual

8b43, Dc lvdt input modules

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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.

Figure 1: 8B43 Block Diagram

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