Impulse 8B50_51 User Manual
Voltage input modules, 20khz bandwidth
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8B Isolated Analog Signal Conditioning Products
8B
8B50/51
Voltage Input Modules, 20kHz Bandwidth
Description
8B modules are an optimal solution for monitoring real-world process signals
and providing high level signals to a data acquisition system. Each 8B50 or 8B51
module isolates, filters and amplifies a voltage input signal and provides an
analog voltage output.
Signal filtering is accomplished with a five-pole filter optimized for time and
frequency response which provides 100dB per decade of rejection above
20kHz. 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 8B50 and 8B51 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 optical 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: 8B50/51 Block Diagram
Features
Accepts Millivolt and Voltage Level Signals
High Level Voltage Outputs
1500Vrms Isolation
ANSI/IEEE C37.90.1 Transient Protection
Input Protected to 240VAC Continuous
100dB CMR
20kHz Signal Bandwidth
±0.10% Accuracy
±0.05% Linearity
Low Drift with Ambient Temperature
UL Listing Pending
Mix and Match Module Types on Backpanel
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