The 8B51-04 is a voltage-input module that isolates, filters, and amplifies a -1V to +1V input signal to produce a 0V to +5V output. It features 1500Vrms isolation, 100dB common-mode rejection at 50Hz or 60Hz, and 100dB per decade normal-mode rejection above 20kHz. The module accepts continuous input voltages up to 240VAC and provides transient protection compliant with ANSI/IEEE C37.90.1. It operates from a +5VDC ±5% power supply, drawing 25mA, and maintains ±0.05% accuracy and ±0.02% linearity. The package measures 1.11" x 1.65" x 0.40" (28.1mm x 41.9mm x 10.2mm) and is rated for operation from -40°C to +85°C. It is UL/cUL listed, CE compliant, and designed for 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 8B50 or 8B51 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 100dB per decade of normal-mode 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.
| Dataforth Corporation | |
|---|---|
| Product Category | Data Acquisition |
| Product Number | 8B51-04 |
| Product Name | 8B50/51 Voltage Input Modules, 20kHz Bandwidth |
| Data Acquisition | Input Module |
| Form Factor | Modular Bay or Slot System |
| Outputs | Analog Voltage Output |
| User Interface | None |
| Application | General Lab & Industrial |
