The 8B31-12 is a voltage input module that isolates, filters, and amplifies a -60V to +60V input signal to produce a -5V to +5V analog output. It features 1500Vrms isolation, 120dB common-mode rejection, and 70dB normal-mode rejection at 60Hz, with ±0.05% accuracy and ±0.02% linearity. The module includes input protection against continuous 240VAC and transient events compliant with ANSI/IEEE C37.90.1, and is powered by +5VDC ±5%. It operates from -40°C to +85°C, measures 1.11" x 1.65" x 0.40" (28.1mm x 41.9mm x 10.2mm), and is UL/cUL listed and CE compliant. It is certified for installation in Class I, Division 2 hazardous locations.
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.
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.
| Dataforth Corporation | |
|---|---|
| Product Category | Data Acquisition |
| Product Number | 8B31-12 |
| Product Name | 8B31 Voltage Input Modules, Narrow Bandwidth |
| Data Acquisition | Input Module |
| Form Factor | Modular Bay or Slot System |
| Outputs | Analog Voltage Output |
| User Interface | None |
| Application | General Lab & Industrial |
