The 8B51-12 is a voltage-input module designed to isolate, filter, and amplify high-level voltage signals for data acquisition systems. It accepts an input range of -60V to +60V and provides a -5V to +5V analog output. The module features 1500Vrms isolation, 100dB CMR at 50/60Hz, and 100dB per decade normal-mode rejection above 20kHz. Input protection supports continuous exposure to 240VAC and transient events per 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 device is rated for operation from -40°C to +85°C, housed in a 1.11" x 1.65" x 0.40" package, and complies with UL/cUL, CE, and RoHS III standards. It is suitable for Class I, Division 2 hazardous locations and is designed for industrial environments with high vibration and electrical noise.
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 | 8B51-12 |
| 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 |