8B30/31 Voltage Input Modules, Narrow Bandwidth
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SensorLex® 8B Isolated Analog Signal Conditioning Products 8B30/31 Voltage Input Modules, Narrow 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 8B30 or 8B31 module isolates, filters, and amplifies a voltage input signal and provides an analog voltage output. Features • Accepts Millivolt and Voltage Level Signals • High-Level Voltage Outputs Signal filtering is accomplished with a 5-pole filter optimized for time and frequency response which provides 70dB of normal-mode rejection at 60Hz. 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 8B30 and 8B31 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. • ANSI/IEEE C37.90.1 Transient Protection • Input Protection to 240VAC Continuous • 70dB NMR at 60Hz • ±0.05% Accuracy • Low Drift with Ambient Temperature • C-UL-US Listed • ATEX Compliance Pending • Mix and Match Module Types on Backpanel Figure 1: 8B30/31 Block Diagram ©1995-2011 Dataforth Corporation, All Rights Reserved ISO9001:2008-Registered QMS

SensorLex® 8B Isolated Analog Signal Conditioning Products Specifications Module Ordering Information 500kΩ (minimum) 500kΩ (minimum) 500kΩ (minimum) CMV, Input to Output Transient, Input to Output CMR (50Hz or 60Hz) NMR –40°C to +85°C –40°C to +85°C 0 to 95% Noncondensing ISM, Group 1 Class A ISM, Group 1 Performance A ±0.5% Span Error Performance B Power Supply Voltage Power Supply Current Power Supply Sensitivity See Ordering Information Continuous Short to Ground ANSI/IEEE C37.90.1 Output Range Accuracy(2) Linearity Stability Offset Gain Noise Output, 100kHz Bandwidth, –3dB Response...